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PRELIMINARY
CY9C62256
Document #: 38-15001 Rev. *E
Page 8 of 11
Power-down/-up Mode AC Waveforms
Parameter
Description
Min.
Typ.
Max.
Unit
VPFD
Power-fail Deselect Voltage
4.2
4.35
4.5
V
tF[18]
VPFD (max.) to VPFD (min.) VCC Fall
Time
100
µs
tFB
VPFD (min.) to VSS VCC Fall Time
50
µs
tR
VSS to VPFD (max.) Rise Time
20
µs
tWP
Write Protect Time On VCC = VPFD (typ)
20
µs
tREC
VPFD (max.) to Inputs Recognized
500
µs
Vcc
VPFD (max)
VPFD (min)
tWP
tFB
tR
tREC
INPUTS
OUTPUTS
DON’T CARE
RECOGNIZED
RECOGNIZED
VALID
VALID
HIGH-Z
tF
tR
VPFD (typ)
Ordering Information
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
70
CY9C62256
−70SC
S21
28-lead (300-mil) Molded SOIC
Commercial
CY9C62256-70SI
S21
28-lead (300-mil) Molded SOIC
Industrial
CY9C62256-70SNC
SN28
28-lead (300-mil) Narrow Body SOIC
Commercial
CY9C62256-70SNI
SN28
28-lead (300-mil) Narrow Body SOIC
Industrial
CY9C62256
−70ZC
Z28
28-lead Thin Small Outline Package
Commercial
CY9C62256
−70ZI
Z28
28-lead Thin Small Outline Package
Industrial
CY9C62256
−70PC
P15
28-lead (600-mil) Molded DIP
Commercial
CY9C62256-70PI
P15
28-lead (600-mil) Molded DIP
Industrial
Note:
18. VPFD (max.) to VPFD (min.) fall time of less than tF may result in deselection/ write protection not occurring until 20 µs after VCC passes VPFD (min.).
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