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CAT28C16A
A 4 ? A 10
ADDR. BUFFER
& LATCHES
ROW
DECODER
2,048 x 8
EEPROM
ARRAY
V CC
CE
OE
WE
A 0 ? A 3
INADVERTENT
WRITE
PROTECTION
CONTROL
LOGIC
TIMER
ADDR. BUFFER
& LATCHES
HIGH VOLTAGE
GENERATOR
DATA POLLING
COLUMN
DECODER
I/O BUFFERS
I/O 0 ? I/O 7
Figure 1. Block Diagram
Table 1. MODE SELECTION
Read
Mode
CE
L
WE
H
OE
L
I/O
D OUT
Power
ACTIVE
Byte Write (WE Controlled)
Byte Write (CE Controlled)
L
L
H
H
D IN
D IN
ACTIVE
ACTIVE
Standby, and Write Inhibit
Read and Write Inhibit
H
X
X
H
X
H
High ? Z
High ? Z
STANDBY
ACTIVE
Table 2. CAPACITANCE (T A = 25 ° C, f = 1.0 MHz, V CC = 5 V)
Symbol
C I/O (Note 1)
C IN (Note 1)
Test
Input/Output Capacitance
Input Capacitance
Max
10
6
Conditions
V I/O = 0 V
V IN = 0 V
Units
pF
pF
1. This parameter is tested initially and after a design or process change that affects the parameter.
Table 3. ABSOLUTE MAXIMUM RATINGS
Parameters
Temperature Under Bias
Storage Temperature
Voltage on Any Pin with Respect to Ground (Note 2)
V CC with Respect to Ground
Package Power Dissipation Capability (T A = 25 ° C)
Lead Soldering Temperature (10 secs)
Output Short Circuit Current (Note 3)
Ratings
–55 to +125
–65 to +150
–2.0 V to +V CC + 2.0 V
? 2.0 to +7.0
1.0
300
100
Units
° C
° C
V
V
W
° C
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 V CC + 0.5 V, which may overshoot to V CC + 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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