Obsolete Product
X24C44
Characteristics subject to change without notice. 7 of 14
REV 1.0 6/22/00
www.xicor.com
EQUIVALENT A.C. LOAD CIRCUIT A.C. CONDITIONS OF TEST
5V
919Ω
497Ω
Output
100pF
Input pulse levels 0V to 3V
Input rise and fall times 10ns
Input and output timing levels 1.5V
A.C. CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Read and Write Cycle Limits
POWER-UP TIMING
Notes: (3) SK rise and fall times must be less than 50ns.
(4) t
PUR
and t
PUW
are the delays required from the time V
CC
is stable until the specified operation can be initiated. These parameters
are periodically sampled and not 100% tested.
Symbol Parameter Min. Max. Unit
F
SK
(3)
SK frequency 1 MHz
t
SKH
SK positive pulse width 400 ns
t
SKL
SK negative pulse width 400 ns
t
DS
Data setup time 400 ns
t
DH
Data hold time 80 ns
t
PD1
SK to data bit 0 valid 375 ns
t
PD
SK to data valid 375 ns
t
Z
Chip enable to output high Z 1 µs
t
CES
Chip enable setup 800 ns
t
CEH
Chip enable hold 350 ns
t
CDS
Chip deselect 800 ns
Symbol Parameter Max. Unit
t
PUR
(4)
Power-up to read operation 200 µs
t
PUW
(4)
power-up to write or store operation 5 ms
