Cypress CY14B256L Computer Hardware User Manual


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November 11, 2008 Document No. 001-20639 Rev. *C 2
AN20639
Summary
In most applications you can directly substitute the CY14B256L for the STK14C88-3 nvSRAM.
Auto Store/Power Up Recall
t
HRECALL
[
2
]
20 ms max 550 µs max
t
STORE
[
3
]
12.5 ms max 10 ms max
V
SWITCH
[
4
]
No minimum 2.65V max 2.7V min 2.95V max
Table 1. Comparison Table (continued)
Specification CY14B256L (35 nsec) STK14C88-3 (35 nsec)
Notes
2. The power up recall specification is the most dramatic difference between the two devices. To accommodate the much slower specification of the CY14B256L
device, system timing modifications may be required.
3. Store timing differences are not an issue because it occurs as a background operation when the system is powering down.
4. Even though there are small differences here they are unlikely to cause system level problems.
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