Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
Standard Serial EEPROM Features
Low-voltage Operation
1.7V Minimum (VCC = 1.7V to 5.5V)
Internally Organized as 256 x 8 (2K)
I2C-compatible (2-wire) Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bi-directional Data Transfer Protocol
400kHz (1.7V) and 1MHz (2.5V, 5.0V) Compatibility
Write Protect Pin for Hardware Data Protection of the Entire Array
Permanent and Reversible Software Write Protection for the First-half of the
Array
Software Procedure to Verify Write Protect Status
16-byte Page Write Modes
Partial Page Writes Allowed
Self-timed Write Cycle (5ms max)
High-reliability
Endurance: 1,000,000 Write Cycles
Data Retention: 100 Years
Green Package Options (PB/Halide-free/RoHS Compliant)
8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, and 5-lead SOT23
Die Sale Options: Wafer Form and Tape and Reel
Enhanced Features in the MAC Serial EEPROM Family
Factory-programmed EUI-48 or EUI-64 Compatible Address
Permanently Locked, Read-only Value
Stored in a Separate Memory Area
Guaranteed Unique EUI Address
Custom Programming Services Available
Manage and Program Customer’s IEEE Assigned OUI
Unique Factory-programmed 128-bit Serial Number
Unique for all Atmel® AT24CS, AT93CS, and AT25S Series Serial EEPROMs
Permanently Locked, Read-only Value
Stored in a Separate Memory Area
AT24MAC402 and AT24MAC602
I2C-Compatible (2-wire) 2-Kbit Serial EEPROM with a
Factory-Programmed EUI-48™ or EUI-64™Address
Plus an Embedded Unique 128-bit Serial Number
2-Kbit (256 x 8)
DATASHEET
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
2
1. Description
The Atmel AT24MAC402 and AT24MAC602 provides 2048 bits of Serial Electrically-Erasable Programmable
Read-Only Memory (EEPROM) organized as 256 words of eight bits each and is accessed via an
I2C-compatible (2-wire) serial interface. In addition, AT24MAC402/602 incorporates an easy and inexpensive
method to obtain a globally unique MAC or EUI address (EUI-48 or EUI-64). AT24MAC402 is an EUI-48
compatible device that contains a 48-bit EUI address, and AT24MAC602 is an EUI-64 compatible device that
contains a 64-bit EUI address.
The EUI-48 and EUI-64 addresses can be assigned as the actual physical address of a system hardware device
or node or it can be assigned to a software instance. These addresses are factory programmed by Atmel and
permanently write protected in an extended memory block located outside of the standard 2-Kbit bit memory
array.
In addition, the AT24MAC402/602 provides the value added feature of a factory-programmed, guaranteed
unique 128-bit serial number located in the extended memory block (same area as the EUI address values).
The serial number is Atmel factory-programmed and permanently write protected. This 128-bit serial number is
compatible with all AT24CS, AT93CS, and AT25S family serial numbers, therefore, providing guaranteed
unique serial numbers for any application that is also using Atmel Serial EEPROMs.
The first-half of the AT24MAC402/602 incorporates a permanent and a reversible software write protection
feature while a hardware write protect feature for the entire array is available via an external pin. The permanent
software write protection is enabled by sending a special command to the device. This protection cannot be
reversed once executed. However, the reversible software write protection can be reversed by sending and
executing a special command. The hardware write protection is controlled by the WP pin state and can be used
to protect the entire array regardless of whether or not the software write protection has been enabled. The
software and hardware write protection features allow the user the flexibility to protect no portion of the memory,
the first-half of the memory, or the entire memory array depending on the specific needs of the application.
The device is optimized for use in many industrial and commercial applications where low-power and
low-voltage operations are essential. The AT24MAC402/602 is available in space saving 8-lead JEDEC SOIC,
8-lead TSSOP, 8-pad UDFN, and 5-lead SOT23 packages. Both devices operate across a wide supply voltage
range from 1.7V to 5.5V VCC.
3
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
2. Pin Configurations and Pinouts
Figure 1. Pin Configurations
Notes: 1. For use of the 5-lead SOT23, the software A2, A1, and A0 bits in the device address word must be set to zero
to properly communicate with the device since the A2, A1, and A0 pins are not bonded out. Some functionality
is not possible due to these pins not being available. See “Write Protection” on page 15 for more details.
2. Drawings are not to scale.
3. Absolute Maximum Ratings*
Pin Name Function
A0-A
2Address Inputs
SDA Serial Data
SCL Serial Clock Input
WP Write Protect
GND Ground
VCC Power Supply 1
2
3
4
A0
A1
A2
GND
8
7
6
5
VCC
WP
SCL
SDA
8-pad UDFN
(Top View)
8-lead TSSOP
(Top View)
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
1
2
3
4
A0
A1
A2
GND
8
7
6
5
VCC
WP
SCL
SDA
8-lead SOIC
(Top View)
5-lead SOT23
(Top View)
SCL
GND
SDA
WP
VCC
1
2
3
5
4
Operating Temperature . . . . . . . . . . .-55°C to +125°C
Storage Temperature . . . . . . . . . . . . .-65°C to +150°C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . -1.0V to +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage
to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
4
4. Block Diagram
Figure 4-1. Block Diagram
Start
Stop
Logic
Data Word
ADDR/Counter
Row Decoder
Device
Address
Comparator
Data Latches
DOUT / ACK
Logic
Column
Decoder
EEPROM
Array
Serial
Control
Logic
High Voltage
Pump & Timing
128-bit
Serial
Number
Serial MUX
Read
Read/Write
Enable
COMP Load
INC
V
CC
GND
WP
SCL
SDA
DOUT
DIN
A
2
A
1
A
0
MAC-48
EUI-48
EUI-64
Address
Read
5
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
5. Pin Description
Serial Clock (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative
edge clock data out of each device.
Serial Data (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may
be wire-ORed with any number of other open-drain or open collector devices.
Device Addresses (A0, A1, A2): The A0, A1, and A2 pins are device address inputs that are hard wired for the
AT24MAC402/602. As many as eight 2K devices may be addressed on a single bus system. Device addressing
is discussed in detail in Section 9., “Device Addressing” on page 13.
Write Protect (WP): The AT24MAC402/602 has a Write Protect pin that provides hardware data protection.
When the Write Protect pin is connected to ground (GND), normal Read/Write operations to the full array are
possible. When the Write Protect pin is connected to VCC, all write operations to the memory are inhibited, but
read operations are still possible. However, due to capacitive coupling that may appear during customer
applications, Atmel recommends always connecting the WP pins to a known state. When using a pull-up
resistor, Atmel recommends using 10k or less. The write protection operation is summarized in Table 5-1
below.
5.1 Write Protection Modes
Table 5-1. Write Protection Modes
WP Pin Status
Permanent Write Protect
Register
Reversible Write Protect
Register
Part of the Array Write
Protected
VCC — — Full Array (2K)
GND or Floating Not Programmed Not Programmed Normal Read/Write
GND or Floating Programmed — First-half of Array
GND or Floating — Programmed First-half of Array
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
6
6. Electrical Characteristics
6.1 Pin Capacitance
Table 6-1. Pin Capacitance(1)
Note: 1. This parameter is characterized and is not 100% tested.
6.2 DC Characteristics
Table 6-2. DC Characteristics
Note: 1. VIL min and VIH max are reference only and are not tested.
Symbol Test Condition Max Units Conditions
CI/O Input/Output Capacitance (SDA) 8 pF VI/O = 0V
CIN Input Capacitance (A0, A1, A2, SCL) 6 pF VIN = 0V
Applicable over recommended operating range from: TAI = -40°C to +85°C, VCC = 1.7V to 5.5V (unless otherwise noted).
Symbol Parameter Test Condition Min Typ Max Units
VCC Supply Voltage 1.7 5.5 V
ICC1 Supply Current VCC = 5.0V Read at 400kHz 0.4 1.0 mA
ICC2 Supply Current VCC = 5.0V Write at 400kHz 2.0 3.0 mA
ISB1 Standby Current VCC = 1.7V VIN = VCC or VSS 1.0 μA
ISB2 Standby Current VCC = 2.5V VIN = VCC or VSS 2.0 μA
ISB3 Standby Current VCC = 5.5V VIN = VCC or VSS, A0 = VSS 6.0 μA
ILI Input Leakage Current VIN = VCC or VSS 0.10 3.0 μA
ILO Output Leakage Current VOUT = VCC or VSS 0.05 3.0 μA
VIL Input Low Level(1) -0.6 VCC x 0.3 V
VIH Input High Level(1) VCC x 0.7 VCC + 0.5 V
VOL1 Output Low Level VCC = 1.7V IOL = 0.15mA 0.2 V
VOL2 Output Low Level VCC = 3.0V IOL = 2.1mA 0.4 V
7
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
6.3 AC Characteristics
Table 6-3. AC Characteristics
Note: 1. This parameter is characterized and is not 100% tested.
Figure 6-1. Bus Timing
SCL Serial Clock, SDA: Serial Data I/O
Symbol Parameter
1.7V 2.5V, 5.0V
UnitsMin Max Min Max
fSCL Clock Frequency, SCL 400 1000 kHz
tLOW Clock Pulse Width Low 1.2 0.4 μs
tHIGH Clock Pulse Width High 0.6 0.4 μs
tINoise Suppression Time(1) 100 50 ns
tAA Clock Low to Data Out Valid 0.1 0.9 0.05 0.55 μs
tBUF
Time the bus must be free before a new
transmission can start.(1) 1.3 0.5 μs
tHD.STA Start Hold Time 0.6 0.25 μs
tSU.STA Start Set-up Time 0.6 0.25 μs
tHD.DAT Data In Hold Time 0 0 μs
tSU.DAT Data In Set-up Time 100 100 ns
tRInputs Rise Time(1) 0.3 0.3 μs
tFInputs Fall Time(1) 300 100 ns
tSU.STO Stop Set-up Time 0.6 0.25 μs
tDH Data Out Hold Time 50 50 ns
tWR Write Cycle Time 5 5 ms
Endurance(1) 25°C, Page Mode, 3.3V 1,000,000 Write cycles
SCL
SDA IN
SDA OUT
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
8
7. Memory Organization
AT24MAC402/602, 2K Serial EEPROM: The 2-Kbit memory array is internally organized as 16 pages of 16
bytes of EEPROM each. Random word addressing requires a 8-bit data word address.
EUI Address and Serial Number: The 48-bit EUI address in the AT24MAC402 and the 64-bit EUI address in
the AT24MAC602 are located in the extended memory block. In addition, the serial number data is also located
in the extended memory block as shown below in Figure 7-1. These EUI-48 or EUI-64 addresses are stored in a
dedicated read-only EEPROM memory block located outside the standard 2K memory array as shown below.
This means the full standard 2-Kbit EEPROM array is available for use as opposed to solutions where only half
of the EEPROM memory array is available for application usage.
Figure 7-1. Memory Organization
The EUI-48 and EUI-64 address fields contain either six or eight bytes respectively. The first three bytes of the
EUI read-only address field are called the Organizationally Unique Identifier (OUI) and the IEEE Registration
Authority has assigned FCC23Dh as the Atmel, OUI.
Following the OUI, the remaining bytes are called the Extension Identifier and will be either three bytes or five
bytes depending on if it is an EUI-48 address (AT24MAC402) or EUI-64 address (AT24MAC602). Atmel
generates this unique 24-bit/40-bit data value along with the OUI to guarantee a globally unique EUI address
value and programs it at the factory before permanently locking the extended memory region.
Standard
2-Kbit
EEPROM
Extended
Memory
Second-half
Address Range (80h-FFh)
EUI-48/64 Value
EUI-48 Address Range (9Ah-9Fh)
EUI-64 Address Range (98h-9Fh)
128-bit Serial Number
Address Range (80h-8Fh)
Permanent or
Reversible Software
Write Protection Capable
or
Full Array Hardware
Write Protection Capable
Full Array Hardware
Write Protection
Capable
Read-only
Read-only
Device Address
‘1010’
Device Address
‘1011’
First-half
Address Range (00h-7Fh)
9
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
7.1 EUI-48 Support
The EUI-48 address is stored in the last six bytes of the AT24MAC402’s extended memory block as shown in
Table 7-1. For information on the protocol to read the EUI-48 value, see Section 9., “Device Addressing” on
page 13 and Section 12., “Read Operations” on page 19.
Table 7-1. 48-Bit EUI Address Memory Map Example
Using an EUI-48 Value in an EUI-64 Application: An EUI-64 compatible value can be generated from the
EUI-48 value contained in the AT24MAC402 by concatenating the 24-bit OUI, an FFFEh data value, and the
24-bit Extension Identifier. This is commonly referred to as an Encapsulated EUI-48 value. However, Atmel
recommends using the AT24MAC602 which contains a true EUI-64 value so that post read processing is not
required by the application.
7.2 EUI-64 Support
For applications that utilize an EUI-64 standard, the EUI-64 address is stored in the last eight bytes of the
AT24MAC602’s extended memory block. Similar to EUI-48, the EUI-64 standard consists of the same three
byte OUI coupled with a five byte extension identifier (Table 7-2). Atmel generates this unique 40-bit data value
coupled with the OUI to guarantee a globally unique 64-bit EUI value and requires no additional data
manipulation like other solutions where the application must manually insert a two byte FFFEh value in between
the OUI and Extension Identifier. For information on how to read the EUI read protocol, see See Section 9.,
“Device Addressing” on page 13 and “Read Operations” on page 19.
Table 7-2. 64-Bit EUI Address Memory Map Example
Note: 1. The data values FFFEh and FFFFh are prohibited beginning from the 40-bit Extension Identifier in Byte 1 and
Byte 2. These values are reserved for denoting an encapsulated MAC-48 or EUI-48 value for use in an EUI-64
environment.
7.3 Non-Atmel OUI Programming Option
For customers with their own IEEE-assigned OUI or Company ID, Atmel offers the time saving option to
manage and deliver custom AT24MAC402/602 devices with their EUI-48/64 values uniquely pre-programmed
at delivery. Contact your local Atmel Sales Office for additional information.
48-Bit EUI
Description 24-Bit OUI 24-Bit Extension Identifier
Memory Address 9Ah 9Bh 9Ch 9Dh 9Eh 9Fh
EUI Data Value FCh C2h 3Dh Byte 1 Byte 2 Byte 3
64-Bit EUI
Description 24-Bit OUI 40-Bit Extension Identifier
Memory Address 98h 99h 9Ah 9Bh 9Ch 9Dh 9Eh 9Fh
EUI Data Value FCh C2h 3Dh Byte 1(1) Byte 2(1) Byte 3 Byte 4 Byte 5
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
10
8. Device Operation
Clock and Data Transitions: The SDA pin is normally pulled high with an external component such as a
pull-up resistor. Data on the SDA pin may change only during SCL low time periods. Data changes during SCL
high periods will indicate a Start or Stop condition as defined below.
Figure 8-1. Data Validity
Start Condition: A high-to-low transition of SDA with SCL high is a Start condition which must precede any
other command.
Stop Condition: A low-to-high transition of SDA with SCL high is a Stop condition. After a read sequence, the
stop command will place the EEPROM in a standby power mode.
Figure 8-2. Start and Stop Condition
SDA
SCL
Data Stable Data Stable
Data
Change
SDA
SCL
Start Stop
11
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
Acknowledge: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words.
The EEPROM sends a zero to acknowledge that it has received each word. This happens during the ninth clock
cycle.
Figure 8-3. Output Acknowledge
Standby Mode: The AT24MAC402/602 features a low-power standby mode which is enabled upon
Power-up or
After the receipt of the Stop condition and the completion of any internal operations.
2-Wire Software Reset: After an interruption in protocol, power loss or system reset, any 2-wire part can be
reset by following these steps:
1. Create a Start condition (if possible).
2. Clock nine cycles.
3. Create another Start condition followed by Stop condition as shown below.
The device should be ready for the next communication after above steps have been completed. In the event
that the device is still non-responsive or remains active on the SDA bus, a power cycle must be used to reset
the device.
Figure 8-4. Software Reset
SCL
Data IN
Data OUT
Start Acknowledge
189
SCL 9
Start
Condition Start
Condition
Stop
Condition
8321
SDA
Dummy Clock Cycles
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
12
Figure 8-5. Write Cycle Timing
SCL Serial Clock, SDA: Serial Data I/O
Note: 1. The write cycle time tWR is the time from a valid Stop condition of a write sequence to the end of
the internal clear/write cycle.
tWR
(1)
Stop
Condition
Start
Condition
Word
N
SCL
SDA
8
th
bit
ACK
13
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
9. Device Addressing
Standard EEPROM Access: The 2K EEPROM requires an 8-bit device address word following a start
condition to enable the chip for a read or write operation (see Figure 10-1 on page 14).
The device address word consists of a mandatory one-zero sequence for the first four most-significant bits
‘1010’(Ah) for normal read and write operations and ‘0110’ (6h) for writing to the Software Write Protect
Register.
The next three bits in the protocol sequence are the A2, A1, and A0 device address bits. These three bits must
match their corresponding hard-wired input pins A2, A1, and A0in order for the part to acknowledge.
The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is
high, and a write operation is initiated if this bit is low. Upon a compare of the device address, the EEPROM will
output a zero. If a compare is not made, the device will return to a standby state. The device will not
acknowledge if the Write Protect Register has been programmed and the control code is ‘0110’(6h).
Serial Number Access: The AT24MAC402/602 incorporates an extended memory block containing a
factory-programmed 128-bit serial number. Access to this memory location is obtained by beginning the device
address word with a ‘1011’(Bh) sequence. The behavior of the next three bits (A2, A1, and A0) remain the
same as during a standard memory addressing sequence.
The eighth bit of the device address needs to be set to a one to read the serial number. A zero in this bit
position, other than during a dummy write sequence to set the address pointer, will result in a unknown condition
and behavior. Writing or altering the 128-bit serial number is not possible as it is permanently write protected.
Further specific protocol is needed to address the serial number feature of the part. For more details on
accessing this special feature, See Section 12., “Read Operations” on page 19.
EUI Address Access: The AT24MAC402/602 utilizes an extended memory block containing a
factory-programmed read-only EUI-48 or EUI-64 address respectively. Access to this memory block is obtained
by beginning the device address word with a ‘1011’ (Bh) sequence. The behavior of the next three bits (A2,
A1, and A0) remain the same as during a standard memory addressing sequence.
The eighth bit of the device address needs to be set to a one to read the EUI address. A zero in this bit position,
other than during a dummy write sequence to set the address pointer, will result in a unknown condition and
behavior. Attempting to write or alter the EUI address is not possible as it is permanently write protected. Further
specific protocol is needed to address this feature of the part. For more details on accessing this special feature,
see Section 12., “Read Operations”.
Table 9-1. Device Address
Access Area Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
EEPROM 1 0 1 0 A2A1A0R/W
EUI or Serial Number Read 1 0 1 1 A2A1A01
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
14
10. Write Operations
Byte Write: A Byte Write operation requires an 8-bit data word address following the device address word and
acknowledgment. Upon receipt of this address, the EEPROM will again acknowledge or respond with a zero
and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will output a
zero and the addressing device, such as a microcontroller, must terminate the write sequence with a Stop
condition. At this time, the EEPROM enters an internally-timed write cycle, tWR, to the nonvolatile memory. All
inputs are disabled during this write cycle and the EEPROM will not respond until the write is complete. The
device will acknowledge a write command, but not write the data if the software or hardware write protection has
been enabled. The write cycle time must be observed even when the write protection is enabled.
Figure 10-1. Byte Write
Page Write: The AT24MAC402/602 is capable of a 16-byte Page Write. A Page Write is initiated by the same
method as a Byte Write, but the microcontroller does not send a Stop condition after the first data word is
clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the microcontroller can
transmit up to fifteen more data words. The EEPROM will respond with a zero after each data word received.
The microcontroller must terminate the page write sequence with a Stop condition.
The lower four data word address bits are internally incremented following the receipt of each data word. The
higher data word address bits are not incremented, retaining the memory page row location. When the internally
generated word address reaches the page boundary, the next byte is placed at the beginning of the same page.
If more than sixteen data words are transmitted to the EEPROM, the data word address will roll-over and
previous data will be overwritten. The address roll-over during write is from the last byte of the current page to
the first byte of the same page. The device will acknowledge a write command, but will not write the data if the
software or hardware write protection has been enabled. The write cycle time must be observed even when the
write protection is enabled.
Figure 10-2. Page Write
Acknowledge Polling: Once the internally-timed write cycle has started and the EEPROM inputs are disabled,
acknowledge polling can be initiated. This involves sending a Start condition followed by the device address
word. The read/write bit is representative of the operation desired. Only if the internal write cycle has completed
will the EEPROM respond with a zero allowing the read or write sequence to continue.
S
T
A
R
T
S
T
O
P
W
R
I
T
E
Device
Address
Word
Address Data
SDA LINE
M
S
B
L
S
B
R
/
W
A
C
K
A
C
K
A
C
K
S
T
A
R
T
S
T
O
P
W
R
I
T
E
Device
Address
SDA LINE
Word
Address Data (n) Data (n + 1) Data (n + x)
M
S
B
L
S
B
R
/
W
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
15
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
11. Write Protection
Once enabled, the Software Write Protection write protects only the first-half of the array (00h - 7Fh) while the
hardware write protection, via the WP pin, is used to protect the entire array (see Table 11-2 on page 16).
Permanent Software Write Protection (PSWP): The Permanent Software Write Protection is enabled by
sending a command to the device, similar to a normal write command, which programs the Permanent Write
Protect Register. This must be done with the WP pin low. The Write Protect Register is programmed by sending
a write command with the device address of ‘0110’(6h) instead of ‘1010’ (Ah) with the address and data
bit(s) being don’t cares. The write cycle time must be observed. Once the permanent software write protection
has been enabled, the device will no longer acknowledge the ‘0110’ (6h) control byte and cannot be reversed
even if the device is powered down. The Permanent Software Write Protection can only be invoked on a SOT23
packaged device with the A2, A1, and A0 bits set to zero.
Figure 11-1. Setting Permanent Write Protect Register (PSWP)
Reversible Software Write Protection (RSWP): The Reversible Software Write Protection is enabled by
sending a command to the device, similar to a normal write command, which programs the Reversible Write
Protect Register. This must be done with the WP pin low. The Reversible Write Protect Register is programmed
by sending a write command ‘01100010’(62h) with pins A2 and A1 tied to ground or not connected and the A0
pin connected to VHV (see Figure 11-2 and Table 11-1 on page 16). The Reversible Write Protection Register or
Write Protection can be reversed by sending a command ‘01100110’(66h) with the A2 pin tied to ground or no
connect, the A1 pin tied to VCC and the A0 pin tied to VHV (see Figure 11-3 on page 16 and Table 11-1 on page
16). Due to the unavailability of the A2, A1, and A0 pins, the Reversible Software Write Protection function is not
available on the SOT23 package.
Figure 11-2. Setting Reversible Write Protect Register (RSWP)
SDA LINE
Word Address DataControl Byte
0 1 1 0 A2 A1 A0 0
S
T
A
R
T
S
T
O
P
A
C
K
A
C
K
A
C
K
= Don’t Care
0110 0100
SDA LINE
Word Address DataControl Byte
S
T
A
R
T
S
T
O
P
A
C
K
A
C
K
A
C
K
= Don’t Care
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
16
Figure 11-3. Clearing Reversible Write Protect Register (RSWP)
Table 11-1. VHV
Note: VHV – VCC > 4.8V
Hardware Write Protection: The WP pin can be connected to VCC, GND, or left floating. Connecting the WP
pin to VCC will write protect the entire array regardless of whether or not the Software Write Protection has been
enabled or invoked (see Table 11-3 on page 17 and Table 11-4 on page 18). The Software Write Protection
Register cannot be programmed when the WP pin is connected to VCC. If the WP pin is connected to GND or left
floating, the write protection mode is determined by the status of the Software Write Protect Register.
Table 11-2. Write Protection
Min Max Units
VHV 7 10 V
Pin Preamble R/W
Command A2A1A0Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Set PSWP A2A1A00 1 1 0 A2A1A00
Set RSWP 0 0 VHV 01100010
Clear RSWP 0 VCC VHV 01100110
0110 0101
SDA LINE
Word Address DataControl Byte
S
T
A
R
T
S
T
O
P
A
C
K
A
C
K
A
C
K
= Don’t Care
17
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
Table 11-3. WP Connected to GND or Floating
WP Connected to GND or Floating
Command
R/W
Bit
Permanent
Write Protect
Register
PSWP
Reversible
Write Protect
Register
RSWP
Response
from
Device Action from Device
1010 R X X ACK Read Array.
1010 W Programmed X ACK Can write to second-half (80h - FFh) only.
1010 W X Programmed ACK Can write to second-half (80h - FFh) only.
1010 W Not Programmed Not Programmed ACK Can write to full array.
Read PSWP R Programmed X No ACK STOP – Indicates Permanent Write Protect
Register is programmed.
Read PSWP R Not Programmed X ACK Data read out is undefined. Indicates PSWP
Register is not programmed.
Set PSWP W Programmed X No ACK STOP – Indicates Permanent Write Protect
Register is programmed.
Set PSWP W Not Programmed X ACK Program Permanent Write Protect Register
(irreversible).
Read RSWP R X Programmed No ACK STOP – Indicates Reversible Write Protect
Register is programmed.
Read RSWP R X Not Programmed ACK Data read out is undefined. Indicates RSWP
Register is not programmed.
Set RSWP W X Programmed No ACK STOP – Indicates Reversible Write Protect
Register is programmed.
Set RSWP W X Not Programmed ACK Program Reversible Write Protect Register
(reversible).
Clear RSWP W Programmed X No ACK STOP – Indicates Permanent Write Protect
Register is programmed.
Clear RSWP W Not Programmed X ACK Clear (unprogram) Reversible Write Protect
Register (reversible).
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
18
Table 11-4. WP Connected to VCC
WP Connected to VCC
Command
R/W
Bit
Permanent
Write Protect
Register
PSWP
Reversible
Write Protect
Register
RSWP
Response
from
Device Action from Device
1010 R X X ACK Read array.
1010 W X X ACK Device is write protected.
Read PSWP R Programmed X No ACK STOP – Indicates pErmanent Write Protect
Register is programmed.
Read PSWP R Not Programmed X ACK Data read out is undefined. Indicates PSWP
Register is not programmed.
Set PSWP W Programmed X No ACK STOP – Indicates Permanent Write Protect
Register is programmed.
Set PSWP W Not Programmed X ACK Cannot program write protect registers.
Read RSWP R X Programmed No ACK STOP – Indicates Reversible Write Protect
Register is programmed.
Read RSWP R X Not Programmed ACK Data read out is undefined. Indicates RSWP
Register is not programmed.
Set RSWP W X Programmed No ACK STOP – Indicates Reversible Write Protect
Register is programmed.
Set RSWP W X Not Programmed ACK Cannot program write protect registers.
Clear RSWP W Programmed X No ACK STOP – Indicates Permanent Write Protect
Register is programmed.
Clear RSWP W Not Programmed X ACK Cannot write to Write Protect Registers.
19
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
12. Read Operations
Read operations are initiated the same way as write operations with the exception that the read/write select bit
in the device address word is set to one. There are three types of read operations:
Current Address Read
Random Address Read
Sequential Read
Current Address Read: The internal data word address counter maintains the last address accessed during
the last read or write operation, incremented by one. This address stays valid between operations as long as
VCC to the chip is maintained. The address roll-over during read is from the last byte of the last memory page to
the first byte of the first page.
Once the device address with the read/write select bit set to one is clocked in and acknowledged by the
EEPROM, the current address data word is serially clocked out. To end the command, the microcontroller does
not respond with a zero but does generate a Stop condition in the subsequent clock cycle.
Figure 12-1. Current Address Read
Random Read: A Random Read requires a dummy byte write sequence to load in the data word address. Once
the device address word and data word address are clocked in and acknowledged by the EEPROM, the
microcontroller must generate another Start condition. The microcontroller now initiates a current address read
by sending a device address with the read/write select bit high. The EEPROM acknowledges the device
address and serially clocks out the data word. To end the random read sequence, the microcontroller does not
respond with a zero but does generate a Stop condition in the subsequent clock cycle.
Figure 12-2. Random Read
Device
Address Data
S
T
A
R
T
R
E
A
D
S
T
O
P
SDA LINE
M
S
B
L
S
B
R
/
W
A
C
K
N
O
A
C
K
SDA LINE
S
T
A
R
T
W
R
I
T
E
S
T
A
R
T
R
E
A
D
S
T
O
P
Device
Address
Word
Address (n)
Device
Address Data (n)
Dummy Write
M
S
B
R
/
W
A
C
K
N
O
A
C
K
A
C
K
A
C
K
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
20
Sequential Read: Sequential reads are initiated by either a current address read or a random address read.
After the microcontroller receives a data word, it responds with an acknowledge. As long as the Serial EEPROM
receives an acknowledge, it will continue to increment the data word address and serially clock out sequential
data words. When the memory address limit is reached, the data word address will “roll over” and the sequential
read will continue. The sequential read operation is terminated when the microcontroller does not respond with
a zero but does generate a following Stop condition in the subsequent clock cycle.
Figure 12-3. Sequential Read
Serial Number Read: Reading the serial number is similar to the sequential read sequence but requires use of
a different device address value as shown in Figure 12-4, followed by a dummy write, and the use of a specific
word address.
Note: The entire 128-bit value must be read from the starting address of the serial number block to guarantee
a unique number.
Since the address pointer of the device is shared between the regular EEPROM array and the serial number
block, a dummy write sequence, as part of a Random Read or Sequential Read protocol, should be performed
to ensure the address pointer is set to zero. A Current Address Read of the serial number block is supported but
if the previous operation was to the EEPROM array, the address pointer will retain the last location accessed,
incremented by one. Reading the serial number from a location other than the first address of the block will not
result in a unique serial number.
Additionally, the most-significant four bits of the word address must be ‘1000’(8h). Thus, if the application
desires to read the pre-programmed serial number, then the corresponding word address input would be 80h. If
a word address other than 80h is used, then the device will output undefined data.
Figure 12-4. Serial Number Read
R
/
W
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
SDA LINE
R
E
A
D
S
T
O
P
Device
Address Data (n + x) Data (n + 2) Data (n + 1) Data (n)
SDA LINE
Device
Address
Word
Address (n)
Device
Address
S
T
A
R
T
W
R
I
T
E
S
T
A
R
T
R
E
A
D
A
C
K
A
C
K
A
C
K
A
C
K
R
/
W
1 0 1 1 1 0 0 0 0 0 0 0 1 0 1 1
M
S
B
Dummy Write
Serial Number
Data Byte 0h
Serial Number
Data Byte 1h
Serial Number
Data Byte 2h
Serial Number
Data Byte 3h
Serial Number
Data Byte Fh
N
O
A
C
K
S
T
O
P
21
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
EUI Address Read: Reading the EUI address is very similar to the Serial Number read sequence with the
exceptions of the starting word address and the amount of data bytes clocked out (see Figure 12-5 on page 21).
The EUI read sequence requires use of the device address values as shown in Table 10-1 on page 14, followed
by a dummy write, and the use of a specific word address from Figure 7-1 on page 9 for EUI-48 standard or
Figure 7-2 on page 9 for EUI-64 standard.
Note: The entire six byte (EUI-48) or eight byte (EUI-64) values must be read from the respective starting
address of either 9Ah (for EUI-48) or 98h (for EUI-64) to guarantee a unique EUI data value.
Since the address pointer of the device is shared between the regular EEPROM array, the serial number block,
and the EUI block, a dummy write sequence should be performed to ensure the address pointer is set to the
correct starting EUI-48 or EUI-64 address. Random reads of the EUI block are supported, but if the previous
operation was to the EEPROM array or to the serial number block, the address pointer will retain the last
location accessed, incremented by one. Reading the EUI data from a location other than the correct starting EUI
address of the block will not result in a unique EUI data value.
Additionally, the most-significant four bits of the word address must be ‘1001’(9h). Therefore, if the application
desires to read the pre-programmed EUI value, then the corresponding word address input would be 9Ah in the
AT24MAC402 and 98h for the AT24MAC602. If a word address other than 9Ah or 98h respectively is used, the
device will output undefined data.
Once the EUI block of six or eight bytes of data have been clocked out of the device, the EUI read operation will
end when the microcontroller does not respond with a zero or acknowledge, but then creates a Stop condition. It
is important to note that the data word address will not roll-over back to the beginning of the respective EUI
starting address. If the read operation continues past the last EUI data value, the data word address will
roll-over back to the beginning of the extended memory block where the 128-bit serial number will begin to read
out. Therefore, every EUI read sequence attempt requires a valid starting address in the dummy write sequence
as shown in Figure 12-5.
Figure 12-5. EUI Address Read
SDA LINE
Device
Address
Word
Address (n)
Device
Address
S
T
A
R
T
W
R
I
T
E
S
T
A
R
T
R
E
A
D
A
C
K
A
C
K
A
C
K
A
C
K
R
/
W
1 0 0 1 * * * * 1 0 1 1 1 0 1 1
M
S
B
Dummy Write
N
O
A
C
K
S
T
O
P
EUI Address
Data Byte (n)
EUI Address
Data Byte (n + 1)
EUI Address
Data Byte (n + 2)
EUI Address
Data Byte (n + 3)
EUI Address
Data Byte (n + x)
A
C
K
A
C
K
* = 1010 (Ah) for 48-Bit EUI and 1000 (8h) for 64-Bit EUI.
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
22
Checking the Permanent Write Protect Register (PSWP) Status: Determining the status of the Permanent
Write Protect Register can be accomplished by sending a similar command to the device as was used when
programming the register, except the R/W bit must be set to one. If the device responds with an acknowledge,
the Permanent Write Protect Register has not been programmed; otherwise, it has been programmed and the
first-half of the array is permanently write protected.
Checking the Reversible Write Protect Register (RSWP) Status: Determining the status of the Reversible
Write Protect Register can be accomplished by sending a similar command to the device as was used when
programming the register, except the R/W bit must be set to one. If the device returns an acknowledge, the
Reversible Write Protect Register has not been programmed; otherwise, it has been programmed and the
first-half of the array is write protected, but remains reversible.
Table 12-1. PSWP and RSWP Status
Pin Preamble R/W
Command A2A1A0Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Read PSWP A2A1A00 1 1 0 A2A1A01
Read RSWP 0 0 A00 1 1 0 0 0 1 1
23
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
13. Ordering Information
13.1 Ordering Code Detail
Atmel Designator
Product Family
EUI Option
4 = EUI-48 Standard
6 = EUI-64 Standard
Package Option
SS = JEDEC SOIC
X = TSSOP
MA = UDFN
ST = SOT23
WWU = Wafer Unsawn
Operating Voltage
M = 1.7V to 5.5V
Package Device Grade or
Wafer/Die Thickness
H = Green, NiPdAu Lead Finish,
Industrial Temperature Range,
(-40°C to +85°C)
U = Green, Matte Sn Lead Finish,
Industrial Temperature Range,
(-40°C to +85°C)
11 = 11 mil Wafer Thickness
Shipping Carrier Option
Device Density
02 = 2-Kbit Density
24MAC = I2C-compatible Serial EEPROM
with EUI Address Feature
with 128-bit Serial Number Feature
B = Bulk (Tubes)
T = Tape and Reel, Standard Quantity Option
E = Tape and Reel, Expanded Quantity Option
AT24MAC402-SSHM-B
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
24
13.2 AT24MAC402/602 Ordering Codes
Note: 1. For wafer sales, please contact Atmel Sales.
Programming of IEEE assigned customer OUIs (non-Atmel OUIs) in conjunction with specific blocks of
EUI-48 (AT24MAC402) or EUI-64 (AT24MAC602) values is available. Contact Atmel for more details.
Additional package types that are not listed may be available. Contact Atmel for more details.
Atmel Ordering Codes Finish Package
Delivery Information Operation
Range
Form Quantity
AT24MAC402-SSHM-B
NiPdAu
(Lead-free/Halogen-free)
8S1
Bulk (Tubes) 100 per Tube
Industrial
Temperature
(-40°C to 85°C)
AT24MAC402-SSHM-T Tape and Reel 4,000 per Reel
AT24MAC402-XHM-B
8X
Bulk (Tubes) 100 per Tube
AT24MAC402-XHM-T Tape and Reel 5,000 per Reel
AT24MAC402-MAHM-T
8MA2
Tape and Reel 5,000 per Reel
AT24MAC402-MAHM-E Tape and Reel 15,000 per Reel
AT24MAC402-STUM-T Matte Tin
(Lead-free/Halogen-free) 5TS1 Tape and Reel 5,000 per Reel
AT24MAC402-WWU11M(1) N/A Wafer Sale Note 1
AT24MAC602-SSHM-B
NiPdAu
(Lead-free/Halogen-free)
8S1
Bulk (Tubes) 100 per Tube
Industrial
Temperature
(-40°C to 85°C)
AT24MAC602-SSHM-T Tape and Reel 4,000 per Reel
AT24MAC602-XHM-B
8X
Bulk (Tubes) 100 per Tube
AT24MAC602-XHM-T Tape and Reel 5,000 per Reel
AT24MAC602-MAHM-T
8MA2
Tape and Reel 5,000 per Reel
AT24MAC602-MAHM-E Tape and Reel 15,000 per Reel
AT24MAC602-STUM-T Matte Tin
(Lead-free/Halogen-free) 5TS1 Tape and Reel 5,000 per Reel
AT24MAC602-WWU11M(1) N/A Wafer Sale Note 1
Package Type
8S1 8-lead, 0.150" wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8X 8-lead, 0.170" wide, Thin Shrink Small Outline Package (TSSOP)
8MA2 8-pad, 2.00mm x 3.00mm body, 0.50mm pitch, Ultra Thin Dual No Lead (UDFN)
5TS1 5-lead, 2.90mm x 1.60mm body, Plastic Thin Shrink Small Outline (SOT23)
25
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
14. Part Markings
DRAWING NO. REV.
TITLE
Catalog Number Truncation
AT24MAC402 Truncation Code ##: P4
AT24MAC602 Truncation Code ##: P6
AAAAAAAA
## M @
ATMLHYWW
8-lead SOIC 8-lead TSSOP
AAAAAAA
## M @
ATHYWW
8-lead UDFN
##
HM@
YXX
2.0 x 3.0 mm Body
5-lead SOT-23
## MU
YMXX
Bottom Mark
Top Mark
Note 2: Package drawings are not to scale
Note 1: designates pin 1
Package Mark Contact:
DL-CSO-Assy_eng@atmel.com
24MAC402-602CSM C
4/3/12
24MAC402-602SM, AT24MAC402 and AT24MAC602
Package Marking Information
Date Codes Voltages
Y = Year M = Month WW = Work Week of Assembly M: 1.7V min
2: 2012 6: 2016 A: January 02: Week 2
3: 2013 7: 2017 B: February 04: Week 4
4: 2014 8: 2018 ... ...
5: 2015 9: 2019 L: December 52: Week 52
Country of Assembly Lot Number Grade/Lead Finish Material
@ = Country of Assembly AAA...A = Atmel Wafer Lot Number H: Industrial/NiPdAu
U: Industrial/Matte Tin
Trace Code Atmel Truncation
XX = Trace Code (Atmel Lot Numbers Correspond to Code) AT: Atmel
Example: AA, AB.... YZ, ZZ ATM: Atmel
ATML: Atmel
AT24MAC402 and AT24MAC602: Package Marking Information
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
26
15. Packaging Information
15.1 8S1 — 8-lead JEDEC SOIC
DRAWING NO. REV. TITLE GPC
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A1 0.10 – 0.25
A 1.35 – 1.75
b 0.31 – 0.51
C 0.17 – 0.25
D 4.80 – 5.05
E1 3.81 – 3.99
E 5.79 – 6.20
e 1.27 BSC
L 0.40 – 1.27
Ø
Ø
0° – 8°
Ø
E
1
N
TOP VIEW
C
E1
END VIEW
A
b
L
A1
e
D
SIDE VIEW
Package Drawing Contact:
packagedrawings@atmel.com
8S1 G
6/22/11
Notes: This drawing is for general information only.
Refer to JEDEC Drawing MS-012, Variation AA
for proper dimensions, tolerances, datums, etc.
8S1, 8-lead (0.150” Wide Body), Plastic Gull Wing
Small Outline (JEDEC SOIC) SWB
27
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
15.2 8X — 8-lead TSSOP
DRAWING NO. REV. TITLE GPC
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A - - 1.20
A1 0.05 - 0.15
A2 0.80 1.00 1.05
D 2.90 3.00 3.10 2, 5
E 6.40 BSC
E1 4.30 4.40 4.50 3, 5
b 0.19 0.25 0.30 4
e 0.65 BSC
L 0.45 0.60 0.75
L1 1.00 REF
C 0.09 - 0.20
Side View
End View
Top View
A2
A
L
L1
D
1
E1
N
b
Pin 1 indicator
this corner
E
e
Notes: 1. This drawing is for general information only.
Refer to JEDEC Drawing MO-153, Variation AA, for proper
dimensions, tolerances, datums, etc.
2. Dimension D does not include mold Flash, protrusions or gate
burrs. Mold Flash, protrusions and gate burrs shall not exceed
0.15mm (0.006in) per side.
3. Dimension E1 does not include inter-lead Flash or protrusions.
Inter-lead Flash and protrusions shall not exceed 0.25mm
(0.010in) per side.
4. Dimension b does not include Dambar protrusion.
Allowable Dambar protrusion shall be 0.08mm total in excess
of the b dimension at maximum material condition. Dambar
cannot be located on the lower radius of the foot. Minimum
space between protrusion and adjacent lead is 0.07mm.
5. Dimension D and E1 to be determined at Datum Plane H.
Package Drawing Contact:
packagedrawings@atmel.com
8X E
2/27/14
8X, 8-lead 4.4mm Body, Plastic Thin
Shrink Small Outline Package (TSSOP) TNR
C
A1
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
28
15.3 8MA2 — 8-pad UDFN
DRAWING NO. REV. TITLE GPC
8MA2 G
11/26/14
8MA2, 8-pad 2 x 3 x 0.6mm Body, Thermally
Enhanced Plastic Ultra Thin Dual Flat No-Lead
Package (UDFN)
YNZ
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A 0.50 0.55 0.60
A1 0.0 0.02 0.05
A2 - - 0.55
D 1.90 2.00 2.10
D2 1.40 1.50 1.60
E 2.90 3.00 3.10
E2 1.20 1.30 1.40
b 0.18 0.25 0.30 3
C 1.52 REF
L 0.30 0.35 0.40
e 0.50 BSC
K 0.20 - -
TOP VIEW
SIDE VIEW
BOTTOM VIEW
Package Drawing Contact:
packagedrawings@atmel.com
C
E
Pin 1 ID
D
8
7
6
5
1
2
3
4
A
A1
A2
D2
E2
e (6x)
L (8x)
b (8x)
Pin#1 ID
K
1
2
3
4
8
7
6
5
Notes: 1. This drawing is for general information only. Refer to
Drawing MO-229, for proper dimensions, tolerances,
datums, etc.
2. The Pin #1 ID is a laser-marked feature on Top View.
3. Dimensions b applies to metallized terminal and is
measured between 0.15 mm and 0.30 mm from the
terminal tip. If the terminal has the optional radius on
the other end of the terminal, the dimension should
not be measured in that radius area.
4. The Pin #1 ID on the Bottom View is an orientation
feature on the thermal pad.
29
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
15.4 5TS1 — 5-lead SOT23
DRAWING NO. REV. TITLE GPC
Package Drawing Contact:
packagedrawings@atmel.com
5TS1 D
5/31/12
5TS1, 5-lead 1.60mm Body, Plastic Thin
Shrink Small Outline Package (Shrink SOT) TSZ
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A - - 1.00
A1 0.00 - 0.10
A2 0.70 0.90 1.00
c 0.08 - 0.20 3
D 2.90 BSC 1,2
E 2.80 BSC 1,2
E1 1.60 BSC 1,2
L1 0.60 REF
e 0.95 BSC
e1 1.90 BSC
b 0.30 - 0.50 3,4
1. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash,
protrusions or gate burrs shall not exceed 0.15 mm per end. Dimension E1 does
not include interlead flash or protrusion. Interlead flash or protrusion shall not
exceed 0.15 mm per side.
2. The package top may be smaller than the package bottom. Dimensions D and E1
are determined at the outermost extremes of the plastic body exclusive of mold
flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch
between the top and bottom of the plastic body.
3. These dimensions apply to the flat section of the lead between 0.08 mm and 0.15
mm from the lead tip.
4. Dimension "b" does not include dambar protrusion. Allowable dambar protrusion
shall be 0.08 mm total in excess of the "b" dimension at maximum material
condition. The dambar cannot be located on the lower radius of the foot. Minimum
space between protrusion and an adjacent lead shall not be less than 0.07 mm.
This drawing is for general information only. Refer to JEDEC
Drawing MO-193, Variation AB for additional information.
54
2
L1
L
C
END VIEW
C
A
A2
A1
b
e
PLANE
SEATING
D
SIDE VIEW
E
e1
E1
3
1
TOP VIEW
AT24MAC402/602 [DATASHEET]
Atmel-8807E-SEEPROM-AT24MAC402-602-Datasheet_012015
30
16. Revision History
Doc. Rev. Date Description
8808E 01/2015
Add the UDFN Expanded Quantity Option and the ordering information section and
reorganize sections.
Update the 8MA2 package outline drawing.
8808D 08/2014
Add bulk SOIC and TSSOP ordering codes. Update ordering code table, 8X and 8MA2
package drawings, and the disclaimer page.
Correct pinouts from bottom to top view and reorganization figures. No changes to functional
specification.
8807C 07/2013 Update status from preliminary to release.
Update footers and disclaimer page.
8807B 09/2012 Update ordering information.
8807A 06/2012 Initial document release.
X
XXX
XX
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