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| X28C256 Datasheet, PDF (11/24 Pages) Xicor Inc. – 5 Volt, Byte Alterable E2PROM | |||
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X28C256
ENDURANCE AND DATA RETENTION
Parameter
Endurance
Data Retention
Min.
100,000
100
POWER-UP TIMING
Symbol
tPUR(4)
tPUW(4)
Parameter
Power-up to Read Operation
Power-up to Write Operation
Max.
100
5
CAPACITANCE TA = +25°C, f = 1MHz, VCC = 5V
Symbol
Parameter
CI/O(4)
CIN(4)
Input/Output Capacitance
Input Capacitance
Max.
10
6
Units
pF
pF
A.C. CONDITIONS OF TEST
Input Pulse Levels
0V to 3V
Input Rise and
Fall Times
Input and Output
Timing Levels
10ns
1.5V
3855 PGM T08.1
MODE SELECTION
CE OE WE
L
L
H
L
H
L
H
X
X
X
L
X
X
X
H
Mode
Read
Write
Standby and
Write Inhibit
Write Inhibit
Write Inhibit
Note: (4) This parameter is periodically sampled and not 100% tested.
EQUIVALENT A.C. LOAD CIRCUIT
SYMBOL TABLE
Units
Cycles
Years
3855 PGM T05.3
Units
µs
ms
3855 PGM T06
Test Conditions
VI/O = 0V
VIN = 0V
3855 PGM T07.1
I/O
DOUT
DIN
High Z
Power
Active
Active
Standby
â
â
â
â
3855 PGM T09
5V
OUTPUT
1.92Kâ¦
1.37Kâ¦
100pF
3855 FHD F22.3
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Donât Care:
Changes
Allowed
N/A
Will be
steady
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not
Known
Center Line
is High
Impedance
11
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