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| X24C44 Datasheet, PDF (8/15 Pages) Xicor Inc. – Serial Nonvolatile Static RAM | |||
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X24C44
EQUIVALENT A.C. LOAD CIRCUIT
5V
OUTPUT
919â¦
497â¦
100pF
A.C. CONDITIONS OF TEST
Input Pulse Levels
Input Rise and
Fall Times
Input and Output
Timing Levels
0V to 3V
10ns
1.5V
3832 PGM T07.1
3832 FHD F11
A.C. CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Read and Write Cycle Limits
Symbol
FSK(3)
tSKH
tSKL
tDS
tDH
tPD1
tPD
tZ
tCES
tCEH
tCDS
POWER-UP TIMING
Parameter
SK Frequency
SK Positive Pulse Width
SK Negative Pulse Width
Data Setup Time
Data Hold Time
SK to Data Bit 0 Valid
SK to Data Valid
Chip Enable to Output High Z
Chip Enable Setup
Chip Enable Hold
Chip Deselect
Min.
400
400
400
80
800
350
800
Max.
1
375
375
1
Units
MHz
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
3832 PGM T08.1
Symbol
Parameter
Max.
Units
tPUR(4)
Power-up to Read Operation
200
tPUW(4)
Power-up to Write or Store Operation
5
µs
ms
3832 PGM T09
Notes: (3) SK rise and fall times must be less than 50ns.
(4) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated. These parameters
are periodically sampled and not 100% tested.
8
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