Features
•Single 3.3V ± 10% Supply
•Fast Read Access Time – 200 ns
•Automatic Page Write Operation
– Internal Address and Data Latches for 128 Bytes
– Internal Control Timer
•Fast Write Cycle Time
– Page Write Cycle Time – 10 ms Maximum
– 1 to 128-Byte Page Write Operation
•Low Power Dissipation
– 15 mA Active Current
–20 µA CMOS Standby Current
•Hardware and Software Data Protection
•DATA Polling for End of Write Detection
•High Reliability CMOS Technology
– Endurance: 105 Cycles
– Data Retention: 10 Years
•JEDEC Approved Byte-Wide Pinout
•Industrial Temperature Range
•Green (Pb/Halide-free) Packaging Option Only
1. Description
The AT28LV010 is a high-performance 3-volt only Electrically Erasable and Program-
mable Read-Only Memory. Its 1 megabit of memory is organized as 131,072 words by
8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device
offers access times to 200 ns with power dissipation of just 54 mW. When the device
is deselected, the CMOS standby current is less than 20 µA.
The AT28LV010 is accessed like a Static RAM for the read or write cycle without the
need for external components. The device contains a 128-byte page register to allow
writing of up to 128 bytes simultaneously. During a write cycle, the address and 1 to
128 bytes of data are internally latched, freeing the address and data bus for other
operations. Following the initiation of a write cycle, the device will automatically write
the latched data using an internal control timer. The end of a write cycle can be
detected by DATA polling of I/O7. Once the end of a write cycle has been detected a
new access for a read or write can begin.
Atmel’s 28LV010 has additional features to ensure high quality and manufacturability.
The device utilizes internal error correction for extended endurance and improved
data retention characteristics. Software data protection is implemented to guard
against inadvertent writes. The device also includes an extra 128 bytes of EEPROM
for device identification or tracking.
1-Megabit
(128K x 8)
Low Voltage
Paged Parallel
EEPROMs
AT28LV010
0395F–PEEPR–08/09
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0395F–PEEPR–08/09
AT28LV010
2. Pin Configurations
2.1 32-lead PLCC Top View
Pin Name Function
A0 - A16 Addresses
CE Chip Enable
OE Output Enable
WE Write Enable
I/O0 - I/O7 Data Inputs/Outputs
NC No Connect
DC Don’t Connect
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
4
3
2
1
32
31
30
14
15
16
17
18
19
20
I/O1
I/O2
GND
I/O3
I/O4
I/O5
I/O6
A12
A15
A16
DC
VCC
WE
NC
2.2 32-lead TSOP Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A11
A9
A8
A13
A14
NC
WE
VCC
NC
A16
A15
A12
A7
A6
A5
A4
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
A3
3
0395F–PEEPR–08/09
AT28LV010
3. Block Diagram
4. Device Operation
4.1 Read
The AT28LV010 is accessed like a Static RAM. When CE and OE are low and WE is high, the
data stored at the memory location determined by the address pins is asserted on the outputs.
The outputs are put in the high impedance state when either CE or OE is high. This dual-line
control gives designers flexibility in preventing bus contention in their system.
4.2 Write
The write operation of the AT28LV010 allows 1 to 128 bytes of data to be written into the
device during a single internal programming period. Each write operation must be preceded by
the software data protection (SDP) command sequence. This sequence is a series of three
unique write command operations that enable the internal write circuitry. The command
sequence and the data to be written must conform to the software protected write cycle timing.
Addresses are latched on the falling edge of WE or CE, whichever occurs last and data is
latched on the rising edge of WE or CE, whichever occurs first. Each successive byte must be
written within 150 µs (tBLC) of the previous byte. If the tBLC limit is exceeded the AT28LV010
will cease accepting data and commence the internal programming operation. If more than
one data byte is to be written during a single programming operation, they must reside on the
same page as defined by the state of the A7 - A16 inputs. For each WE high to low transition
during the page write operation, A7 - A16 must be the same.
The A0 to A6 inputs are used to specify which bytes within the page are to be written. The
bytes may be loaded in any order and may be altered within the same load period. Only bytes
which are specified for writing will be written; unnecessary cycling of other bytes within the
page does not occur.
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0395F–PEEPR–08/09
AT28LV010
4.3 DATA Polling
The AT28LV010 features DATA Polling to indicate the end of a write cycle. During a byte or
page write cycle an attempted read of the last byte written will result in the complement of the
written data to be presented on I/O7. Once the write cycle has been completed, true data is
valid on all outputs, and the next write cycle may begin. DATA Polling may begin at anytime
during the write cycle.
4.4 Toggle Bit
In addition to DATA Polling the AT28LV010 provides another method for determining the end
of a write cycle. During the write operation, successive attempts to read data from the device
will result in I/O6 toggling between one and zero. Once the write has completed, I/O6 will stop
toggling and valid data will be read. Reading the toggle bit may begin at any time during the
write cycle.
4.5 Data Protection
If precautions are not taken, inadvertent writes may occur during transitions of the host system
power supply. Atmel® has incorporated both hardware and software features that will protect
the memory against inadvertent writes.
4.5.1 Hardware Protection
Hardware features protect against inadvertent writes to the AT28LV010 in the following ways:
(a) VCC power-on delay – once VCC has reached 2.0V (typical) the device will automatically
time out 5 ms (typical) before allowing a write; (b) write inhibit – holding any one of OE low, CE
high or WE high inhibits write cycles; and (c) noise filter – pulses of less than 15 ns (typical) on
the WE or CE inputs will not initiate a write cycle.
4.5.2 Software Data Protection
The AT28LV010 incorporates the industry standard software data protection (SDP) function.
Unlike standard 5-volt only EEPROM’s, the AT28LV010 has SDP enabled at all times. There-
fore, all write operations must be preceded by the SDP command sequence.
The data in the 3-byte command sequence is not written to the device; the addresses in the
command sequence can be utilized just like any other location in the device. Any attempt to
write to the device without the 3-byte sequence will start the internal timers. No data will be
written to the device. However, for the duration of tWC, read operations will effectively be poll-
ing operations.
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0395F–PEEPR–08/09
AT28LV010
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
5. DC and AC Operating Range
AT28LV010-20 AT28LV010-25
Operating
Temperature (Case) Ind. -40°C - 85°C -40°C - 85°C
VCC Power Supply 3.3V ± 5% 3.3V ± 10%
6. Operating Modes
Mode CE OE WE I/O
Read VIL VIL VIH DOUT
Write(2) VIL VIH VIL DIN
Standby/Write Inhibit VIH X(1) X High Z
Write Inhibit X X VIH
Write Inhibit X VIL X
Output Disable X VIH X High Z
7. Absolute Maximum Ratings*
Temperature Under Bias................................ -55°C to +125°C *NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age 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
Storage Temperature..................................... -65°C to +150°C
All Input Voltages (including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground .............................-0.6V to VCC + 0.6V
Voltage on OE and A9
with Respect to Ground ...................................-0.6V to +13.5V
8. DC Characteristics
Symbol Parameter Condition Min Max Units
ILI Input Load Current VIN = 0V to VCC 1µA
ILO Output Leakage Current VI/O = 0V to VCC 1µA
ISB VCC Standby Current CMOS CE = VCC - 0.3V to VCC + 1V Ind. 50 µA
ICC VCC Active Current f = 5 MHz; IOUT = 0 mA; VCC = 3.6V 15 mA
VIL Input Low Voltage 0.8 V
VIH Input High Voltage 2.0 V
VOL Output Low Voltage IOL = 1.6 mA; VCC = 3.0V 0.45 V
VOH Output High Voltage IOH = -100 μA; VCC = 3.0V 2.4 V
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0395F–PEEPR–08/09
AT28LV010
10. AC Read Waveforms(1)(2)(3)(4)
Notes: 1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC.
2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change
without impact on tACC.
3. tDF is specified from OE or CE whichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
5. If CE is de-asserted, it must remain de-asserted for at least 50ns during read operations otherwise incorrect data may be
read.
9. AC Read Characteristics
Symbol Parameter
AT28LV010-20
UnitsMin Max
tACC Address to Output Delay 200 ns
tCE(1) CE to Output Delay 200 ns
tOE(2) OE to Output Delay 0 80 ns
tDF(3)(4) CE or OE to Output Float 0 55 ns
tOH Output Hold from OE, CE or Address, Whichever Occurred First 0 ns
tCEPH(5) CE Pulse High Time 50 ns
tCEPH
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0395F–PEEPR–08/09
AT28LV010
Note: 1. All write operations must be preceded by the SDP command sequence.
15. AC Write Waveforms
15.1 WE Controlled
15.2 CE Controlled
14. AC Write Characteristics(1)
Symbol Parameter Min Max Units
tAS, tOES Address, OE Set-up Time 0 ns
tAH Address Hold Time 100 ns
tCS Chip Select Set-up Time 0 ns
tCH Chip Select Hold Time 0 ns
tWP Write Pulse Width (WE or CE)200ns
tDS Data Set-up Time 100 ns
tDH, tOEH Data, OE Hold Time 10 ns
9
0395F–PEEPR–08/09
AT28LV010
17. Programming Algorithm
Notes: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex).
2. Data protect state will be re-activated at the end of program cycle.
3. 1 to 128 bytes of data are loaded.
18. Software Protected Program Cycle Waveforms(1)(2)(3)
Notes: 1. A0 - A14 must conform to the addressing sequence for the first three bytes as shown above.
2. After the command sequence has been issued and a page write operation follows, the page address inputs (A7 - A16) must
be the same for each high to low transition of WE (or CE).
3. OE must be high only when WE and CE are both low.
16. Software Protected Write Characteristics
Symbol Parameter Min Max Units
tWC Write Cycle Time 10 ms
tAS Address Set-up Time 0 ns
tAH Address Hold Time 100 ns
tDS Data Set-up Time 100 ns
tDH Data Hold Time 10 ns
tWP Write Pulse Width 200 ns
tBLC Byte Load Cycle Time 150 µs
tWPH Write Pulse Width High 100 ns
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
LOAD DATA XX
TO
ANY ADDRESS
(3)
LOAD LAST BYTE
TO
LAST ADDRESS
(3)
ENTER DATA
PROTECT STATE
WRITES ENABLED
(2)
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0395F–PEEPR–08/09
AT28LV010
Notes: 1. These parameters are characterized and not 100% tested.
2. See AC Read Characteristics
20. Data Polling Waveforms
Notes: 1. These parameters are characterized and not 100% tested.
2. See AC Read Characteristics
22. Toggle Bit Waveforms
Notes: 1. Toggling either OE or CE or both OE and CE will operate toggle bit.
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
19. Data Polling Characteristics(1)
Symbol Parameter Min Typ Max Units
tDH Data Hold Time 10 ns
tOEH OE Hold Time 10 ns
tOE OE to Output Delay(2) ns
tWR Write Recovery Time 0 ns
21. Toggle Bit Characteristics(1)
Symbol Parameter Min Typ Max Units
tDH Data Hold Time 10 ns
tOEH OE Hold Time 10 ns
tOE OE to Output Delay(2) ns
tOEHP OE High Pulse 150 ns
tWR Write Recovery Time 0 ns
11
0395F–PEEPR–08/09
AT28LV010
23. Ordering Information
Note: To receive product with the SDP feature temporarily disabled, order with SL319.
23.1 Green Package Option (Pb/Halide-free)
tACC
(ns)
ICC (mA)
Ordering Code Package Operation RangeActive Standby
200 15 0.05 AT28LV010-20JU 32J Industrial
(-40° to 85°C)
AT28LV010-20TU 32T
Package Type
32J 32-lead, Plastic J-leaded Chip Carrier (PLCC)
32T 32-lead, Plastic Thin Small Outline Package (TSOP)
23.2 Die Products
Contact Atmel Sales for die sales options.
12
0395F–PEEPR–08/09
AT28LV010
24. Packaging Information
24.1 32J – PLCC
DRAWING NO. REV.
2325 Orchard Parkway
San Jose, CA 95131
R
TITLE
32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) B
32J
10/04/01
1.14(0.045) X 45˚ PIN NO. 1
IDENTIFIER
1.14(0.045) X 45˚
0.51(0.020)MAX
0.318(0.0125)
0.191(0.0075)
A2
45˚ MAX (3X)
A
A1
B1 E2
B
e
E1 E
D1
D
D2
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE.
2. Dimensions D1 and E1 do not include mold protrusion.
Allowable protrusion is .010"(0.254 mm) per side. Dimension D1
and E1 include mold mismatch and are measured at the extreme
material condition at the upper or lower parting line.
3. Lead coplanarity is 0.004" (0.102 mm) maximum.
A 3.175 – 3.556
A1 1.524 – 2.413
A2 0.381 – –
D 12.319 – 12.573
D1 11.354 – 11.506 Note 2
D2 9.906 – 10.922
E 14.859 – 15.113
E1 13.894 – 14.046 Note 2
E2 12.471 – 13.487
B 0.660 – 0.813
B1 0.330 – 0.533
e 1.270 TYP
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0395F–PEEPR–08/09
AT28LV010
24.2 32T – TSOP
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
32T, 32-lead (8 x 20 mm Package) Plastic Thin Small Outline
Package, Type I (TSOP) B
32T
10/18/01
PIN 1
D1 D
Pin 1 Identifier
b
e
EA
A1
A2
0º ~ 8º c
L
GAGE PLANE
SEATING PLANE
L1
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This package conforms to JEDEC reference MO-142, Variation BD.
2. Dimensions D1 and E do not include mold protrusion. Allowable
protrusion on E is 0.15 mm per side and on D1 is 0.25 mm per side.
3. Lead coplanarity is 0.10 mm maximum.
A – – 1.20
A1 0.05 – 0.15
A2 0.95 1.00 1.05
D 19.80 20.00 20.20
D1 18.30 18.40 18.50 Note 2
E 7.90 8.00 8.10 Note 2
L 0.50 0.60 0.70
L1 0.25 BASIC
b 0.17 0.22 0.27
c 0.10 – 0.21
e 0.50 BASIC
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0395F–PEEPR–08/09
AT28LV010
Revision History
Doc. Rev. Date Comments
0395F 08/2009 Implemented Revision History and updated AC Characterisitics and
ordering information.
0395F 07/2009
Add a revision history page and update this version ‘F’ with the
changes.
Update AC Characateristics.
0395F–PEEPR–08/09
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