DS1251 Datasheet, PDF (10/22 Pages) Dallas Semiconductor – 4096k NV SRAM with Phantom Clock

DS1251/DS1251P
MEMORY AC ELECTRICAL CHARACTERISTICS Over the operating range (5V)
PARAMETER
SYMBOL
DS1251Y-70
MIN
MAX
UNITS NOTES
Read Cycle Time
Access Time
t_RC
70
ns
t_ACC
70
ns
OE to Output Valid
t_OE
35
ns
CE to Output Valid
t_CO
70
ns
OE or CE to Output Active
t_COE
5
ns
5
Output High-Z from Deselection
t_OD
25
ns
5
Output Hold from Address Change
t_OH
5
ns
Write Cycle Time
t_WC
70
ns
Write Pulse Width
t_WP
50
ns
3
Address Setup Time
t_AW
0
ns
Write Recovery Time
t_WR
0
ns
Output High-Z from WE
t_ODW
25
ns
5
Output Active from WE
t_OEW
5
ns
5
Data Setup Time
t_DS
30
ns
4
Data Hold Time from WE
t_DH
5
ns
4
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