Cypress AN20639 사용자 설명서
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
[
]
20 ms max
550 µs max
t
STORE
[
12.5 ms max
10 ms max
V
SWITCH
[
]
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.
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.