© Semiconductor Components Industries, LLC, 2009
October, 2009 Rev. 6
1Publication Order Number:
CAT28C16A/D
CAT28C16A
16 kb CMOS Parallel
EEPROM
Description
The CAT28C16A is a fast, low power, 5Vonly CMOS Parallel
EEPROM organized as 2K x 8bits. It requires a simple interface for
insystem programming. Onchip address and data latches,
selftimed write cycle with autoclear and VCC power up/down write
protection eliminate additional timing and protection hardware. DATA
Polling signals the start and end of the selftimed write cycle.
Additionally, the CAT28C16A features hardware write protection.
The CAT28C16A is manufactured using ON Semiconductors
advanced CMOS floating gate technology. It is designed to endure
100,000 program/erase cycles and has a data retention of 100 years.
The device is available in JEDEC approved 24pin DIP and SOIC or
32pin PLCC packages.
Features
Fast Read Access Times: 90 ns, 120 ns, 200 ns
Low Power CMOS Dissipation:
– Active: 25 mA Max.
– Standby: 100 mA Max.
Simple Write Operation:
– Onchip Address and Data Latches
– Selftimed Write Cycle with Autoclear
Fast Write Cycle Time: 10 ms Max
End of Write Detection: DATA Polling
Hardware Write Protection
CMOS and TTL Compatible I/O
100,000 Program/Erase Cycles
100 Year Data Retention
Commercial, Industrial and Automotive Temperature Ranges
PIN CONFIGURATION
TOP VIEW
PLCC Package (N, G)
DIP Package (L)
SOIC Package (J, K, W, X)
5
4
7
6
3
2
1
10
9
12
11
8
20
21
18
19
22
23
24
15
16
13
14
17
VCC
A8
A9
WE
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
5
7
6
10
9
12
11
8
13
14 15 16 17 18 19 20
4 3 2 1 32 31 30
29
27
28
24
25
22
23
26
21
A8
A9
NC
NC
OE
A10
CE
I/O7
I/O6
A7
NC
NC
NC
VCC
WE
NC
A6
A5
A4
A3
A2
A1
A0
NC
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
VSS
NC
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See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
ORDERING INFORMATION
PDIP24
L SUFFIX
CASE 646AD
PLCC32
N, G SUFFIX
CASE 776AK
Address InputsA0A10
Data Inputs/OutputsI/O0I/O7
Chip EnableCE
Output EnableOE
Write EnableWE
5 V SupplyVCC
FunctionPin Name
PIN FUNCTION
SOIC24
J, K, W, X SUFFIX
CASE 751BK
GroundVSS
No ConnectNC
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Figure 1. Block Diagram
ADDR. BUFFER
& LATCHES
ADDR. BUFFER
& LATCHES
INADVERTENT
CONTROL
LOGIC
TIMER
HIGH VOLTAGE
GENERATOR
I/O BUFFERS
2,048 x 8
EEPROM
ARRAY
CE
OE
WE
VCC
A0A3
A4A10
WRITE
PROTECTION
COLUMN
DECODER
ROW
DECODER
DATA POLLING
I/O0I/O7
Table 1. MODE SELECTION
Mode CE WE OE I/O Power
Read L H L DOUT ACTIVE
Byte Write (WE Controlled) L H DIN ACTIVE
Byte Write (CE Controlled) L H DIN ACTIVE
Standby, and Write Inhibit H X X HighZ STANDBY
Read and Write Inhibit X H H HighZ ACTIVE
Table 2. CAPACITANCE (TA = 25°C, f = 1.0 MHz, VCC = 5 V)
Symbol Test Max Conditions Units
CI/O (Note 1) Input/Output Capacitance 10 VI/O = 0 V pF
CIN (Note 1) Input Capacitance 6 VIN = 0 V pF
1. This parameter is tested initially and after a design or process change that affects the parameter.
Table 3. ABSOLUTE MAXIMUM RATINGS
Parameters Ratings Units
Temperature Under Bias –55 to +125 °C
Storage Temperature –65 to +150 °C
Voltage on Any Pin with Respect to Ground (Note 2) –2.0 V to +VCC + 2.0 V V
VCC with Respect to Ground 2.0 to +7.0 V
Package Power Dissipation Capability (TA = 25°C) 1.0 W
Lead Soldering Temperature (10 secs) 300 °C
Output Short Circuit Current (Note 3) 100 mA
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
2. The minimum DC input voltage is 0.5 V. During transitions, inputs may undershoot to 2.0 V for periods of less than 20 ns. Maximum DC
voltage on output pins is VCC + 0.5 V, which may overshoot to VCC + 2.0 V for periods of less than 20 ns.
3. Output shorted for no more than one second. No more than one output shorted at a time.
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Table 4. RELIABILITY CHARACTERISTICS (Note 4)
Symbol Parameter Min Max Units
NEND (Note 5) Endurance 100,000 Cycles/Byte
TDR (Notes 5) Data Retention 100 Years
VZAP ESD Susceptibility 2,000 V
ILTH (Note 6) LatchUp 100 mA
4. This parameter is tested initially and after a design or process change that affects the parameter.
5. For the CAT28C16A20, the minimum endurance is 10,000 cycles and the minimum data retention is 10 years.
6. Latchup protection is provided for stresses up to 100 mA on address and data pins from 1 V to VCC + 1 V.
Table 5. D.C. OPERATING CHARACTERISTICS (VCC = 5 V ±10%, unless otherwise specified.)
Symbol Parameter Test Conditions
Limits
Units
Min Typ Max
ICC VCC Current (Operating, TTL) CE = OE = VIL,
f = 1/tRC min, All I/O’s Open
35 mA
ICCC (Note 7) VCC Current (Operating, CMOS) CE = OE = VILC,
f = 1/tRC min, All I/O’s Open
25 mA
ISB VCC Current (Standby, TTL) CE = VIH, All I/O’s Open 1 mA
ISBC (Note 8) VCC Current (Standby, CMOS) CE = VIHC, All I/O’s Open 100 mA
ILI Input Leakage Current VIN = GND to VCC 10 10 mA
ILO Output Leakage Current VOUT = GND to VCC,
CE = VIH
10 10 mA
VIH (Note 8) High Level Input Voltage 2 VCC + 0.3 V
VIL (Note 7) Low Level Input Voltage 0.3 0.8 V
VOH High Level Output Voltage IOH = 400 mA2.4 V
VOL Low Level Output Voltage IOL = 2.1 mA 0.4 V
VWI Write Inhibit Voltage 3.0 V
7. VILC = 0.3 V to +0.3 V
8. VIHC = VCC 0.3 V to VCC + 0.3 V
Table 6. A.C. CHARACTERISTICS, READ CYCLE (VCC = 5 V ±10%, unless otherwise specified.)
Symbol Parameter
28C16A90 28C16A12 28C16A20
Units
Min Max Min Max Min Max
tRC Read Cycle Time 90 120 200 ns
tCE CE Access Time 90 120 200 ns
tAA Address Access Time 90 120 200 ns
tOE OE Access Time 50 60 80 ns
tLZ (Note 9) CE Low to Active Output 0 0 0 ns
tOLZ (Note 9) OE Low to Active Output 0 0 0 ns
tHZ (Notes 9, 10) CE High to HighZ Output 50 50 55 ns
tOHZ (Notes 9,
10)
OE High to HighZ Output 50 50 55 ns
tOH (Note 9) Output Hold from Address Change 0 0 0 ns
9. This parameter is tested initially and after a design or process change that affects the parameter.
10.Output floating (HighZ) is defined as the state when the external data line is no longer driven by the output buffer.
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Figure 2. A.C. Testing Input/Output Waveform (Note 11)
INPUT PULSE LEVELS REFERENCE POINTS
2.0 V
0.8 V
2.4 V
0.45 V
11. Input rise and fall times (10% and 90%) < 10 ns.
Figure 3. A.C. Testing Load Circuit (example)
1.3V
DEVICE
UNDER
TEST
1N914
3.3K
OUT
CL = 100 pF
CL INCLUDES JIG CAPACITANCE
Table 7. A.C. CHARACTERISTICS, WRITE CYCLE (VCC = 5 V ±10%, unless otherwise specified.)
Symbol Parameter
28C16A90 28C16A12 28C16A20
Units
Min Max Min Max Min Max
tWC Write Cycle Time 5 5 10 ms
tAS Address Setup Time 0 0 10 ns
tAH Address Hold Time 100 100 100 ns
tCS CE Setup Time 0 0 0 ns
tCH CE Hold Time 0 0 0 ns
tCW (Note 12) CE Pulse Time 110 110 150 ns
tOES OE Setup Time 0 0 15 ns
tOEH OE Hold Time 0 0 15 ns
tWP (Note 12) WE Pulse Width 110 110 150 ns
tDS Data Setup Time 60 60 50 ns
tDH Data Hold Time 0 0 10 ns
tDL Data Latch Time 5 10 5 10 50 ns
tINIT (Note 13) Write Inhibit Period After Powerup 0.05 100 0.05 100 5 20 ms
12.A write pulse of less than 20 ns duration will not initiate a write cycle.
13.This parameter is tested initially and after a design or process change that affects the parameter.
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DEVICE OPERATION
Read
Data stored in the CAT28C16A is transferred to the data bus when WE is held high, and both OE and CE are held low. The
data bus is set to a high impedance state when either CE or OE goes high. This 2line control architecture can be used to
eliminate bus contention in a system environment.
Figure 4. Read Cycle
ADDRESS
DATA OUT DATA VALIDDATA VALID
HIGHZ
tOHZ
tHZ
tAA
tOH
tOE
tOLZ
tCE
tLZ
tRC
VIH
CE
OE
WE
Figure 5. Byte Write Cycle [WE Controlled]
ADDRESS
DATA OUT
DATA IN DATA VALID
HIGHZ
WE
OE
CE
tAH
tAS
tCS tCH
tWP
tOES tOEH
tDL
tDS tDH
tWC
Byte Write
A write cycle is executed when both CE and WE are low,
and OE is high. Write cycles can be initiated using either WE
or CE, with the address input being latched on the falling
edge of WE or CE, whichever occurs last. Data, conversely,
is latched on the rising edge of WE or CE, whichever occurs
first. Once initiated, a byte write cycle automatically erases
the addressed byte and the new data is written within 10 ms.
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DATA Polling
DATA polling is provided to indicate the completion of a
byte write cycle. Once a byte write cycle is initiated,
attempting to read the last byte written will output the
complement of that data on I/O7 (I/O0–I/O6 are
indeterminate) until the programming cycle is complete.
Upon completion of the selftimed byte write cycle, all I/O’s
will output true data during a read cycle.
Figure 6. Byte Write Cycle [CE Controlled]
ADDRESS
DATA OUT
DATA IN DATA VALID
HIGHZ
WE
OE
CE
tAS tAH
tCS
tOES
tCW
tOEH
tCH
tDL
tDS tDH
tWC
Figure 7. DATA Polling
ADDRESS
I/O7
WE
OE
CE
DIN = X DOUT = X DOUT = X
tOEH tOE
tWC
tOES
Hardware Data Protection
The following is a list of hardware data protection features
that are incorporated into the CAT28C16A.
1. VCC sense provides for write protection when VCC
falls below 3.0 V min.
2. A power on delay mechanism, tINIT (see AC
characteristics), provides a 5 to 20 ms delay before
a write sequence, after VCC has reached 3.0 V
min.
3. Write inhibit is activated by holding any one of
OE low, CE high or WE high.
4. Noise pulses of less than 20 ns on the WE or CE
inputs will not result in a write cycle.
CAT28C16A
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PACKAGE DIMENSIONS
PLCC 32
CASE 776AK01
ISSUE O
E1 E2E
PIN#1 IDENTIFICATION
D
D1
be
b1
D2
A2
A3
SIDE VIEW
TOP VIEW END VIEW
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MS-016.
SYMBOL MIN NOM MAX
A2
A3
b
b1
D
D1
D2
E
E1
e
E2
2.54
0.33
0.66
12.32
12.10
11.36
9.56
14.86
0.38
2.80
0.54
0.82
12.57
13.86
11.50
11.32
15.11
1.27 BSC
13.90 14.04
CAT28C16A
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PACKAGE DIMENSIONS
SOIC24, 300 mils
CASE 751BK01
ISSUE O
E1 E
A1
A2
e
PIN#1 IDENTIFICATION
b
D
c
A
TOP VIEW
SIDE VIEW END VIEW
q1
q1
h
h
L
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-013.
q
SYMBOL MIN NOM MAX
θ
A
A1
b
c
D
E
E1
e
h
0.10
0.31
0.20
0.25
15.20
10.11
7.34
1.27 BSC
2.65
0.30
0.51
0.33
0.75
15.40
10.51
7.60
L0.40 1.27
2.35
A2 2.05 2.55
θ1 15º
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PACKAGE DIMENSIONS
PDIP24, 600 mils
CASE 646AD01
ISSUE A
E1
D
ebb1 eB
c
SIDE VIEW
TOP VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MS-011.
A2 A
A1 L
E
SYMBOL MIN NOM MAX
A
A1
A2
b
b1
c
D
e
E1
L
0.39
3.18
0.36
12.32
0.77
0.21
31.50
2.54 BSC
6.35
4.95
0.55
14.73
1.77
0.38
32.25
eB 15.24 17.78
E 15.24 15.87
2.93 5.08
CAT28C16A
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Example of Ordering Information
Prefix Device # Suffix
Company ID
CAT 28C16A N
Product Number
28C16A
I 20 T
Package
Blank = Commercial (0°C to +70°C)
I = Industrial (40°C to +85°C)
A = Automotive (40°C to +105°C)
Temperature Range
N: PLCC
J: SOIC (JEDEC)
K: SOIC (EIAJ)
L: PDIP (Lead Free, Halogen Free)
G: PLCC (Lead Free, Halogen Free)
W: SOIC (JEDEC) (Lead Free, Halogen Free)
X: SOIC (EIAJ) (Lead Free, Halogen Free)
T: Tape & Reel
Speed
90: 90 ns
12: 120 ns
20: 200 ns
Tape & Reel (Note 15)
(Optional)
14.The device used in the above example is a CAT28C16ANI20T (PLCC, Industrial Temperature, 200 ns Access Time, Tape & Reel).
15.For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
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CAT28C16A/D
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Phone: 421 33 790 2910
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Phone: 81357733850
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