DS1251 Ver la hoja de datos (PDF) - Unspecified
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DS1251 Datasheet PDF : 18 Pages
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DS1251/DS1251P
4096K NV SRAM with Phantom Clock
MEMORY AC ELECTRICAL CHARACTERISTICS Over the operating range (5V)
PARAMETER
SYMBOL
DS1251Y-70
MIN
MAX
Read Cycle Time
Access Time
to Output Valid
to Output Valid
or
to output Active
Output High-Z from Deselection
Output Hold from Address Change
Write Cycle Time
Write Pulse Width
Address Setup Time
Write Recovery Time
tRC
tACC
tOE
tCO
tCOE
tOD
tOH
tWC
TWP
tAW
tWR
70
70
35
70
5
25
5
70
50
0
0
Output High-Z from
Output Active from
tODW
25
tOEW
5
Data Setup Time
Data Hold Time from
tDS
30
tDH
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
5
5
3
5
5
4
4
PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
MIN
Read Cycle Time
tRC
65
Access Time
tCO
Access Time
tOE
to Output Low-Z
tCOE
5
to Output High-Z
tOEE
5
to Output High-Z
tOD
to Output High-Z
tODO
Read Recovery
tRR
10
Write Cycle Time
tWC
65
Write Pulse Width
tWP
55
Write Recovery
tWR
10
Data Setup Time
tDS
30
Data Hold Time
tDH
0
Pulse Width
tCW
60
Pulse Width
tRST
65
Over the operating range (5V)
TYP
MAX
UNITS
NOTES
ns
55
ns
55
ns
ns
ns
25
ns
5
25
ns
5
ns
ns
ns
3
ns
10
ns
4
ns
4
ns
ns
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