DS1251YP Ver la hoja de datos (PDF) - Unspecified
Número de pieza
componentes Descripción
Fabricante
DS1251YP Datasheet PDF : 18 Pages
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DS1251/DS1251P
4096K NV SRAM with Phantom Clock
PHANTIOM CLOCK AC ELECTRICAL CHARACTERISTICS
PARAMETER
Read Cycle time
Access Time
Access Time
to Output Low-Z
to Output Low-Z
to Output High-Z
to Output High-Z
Read Recovery
Write Cycle Time
Write Pulse Width
Write Recovery
Data Setup Time
Data Hold Time
Pulse Width
Pulse Width
SYMBOL
tRC
tCO
tOE
tCOE
tOEE
tOD
tODO
tRR
tWC
tWP
tWR
tDS
tDH
tCW
tRST
MIN
120
5
5
20
120
100
20
45
0
105
120
Over the operating range (3.3V)
TYP
MAX
UNITS
NOTES
ns
100
ns
100
ns
ns
ns
40
ns
5
40
ns
5
ns
ns
ns
3
ns
10
ns
4
ns
4
ns
ns
POWER-DOWN/POWER-UP TIMING
PARAMETER
SYMBOL
MIN
at VIH before Power-Down
tPD
0
Vcc Slew from VPF(max) to
VPF(min) (
at VIH)
300
tF
Vcc Slew from VPF(max) to
tR
0
VPF(min) (
at VIH)
at VIH after Power-Up
tREC
1.5
Over the operating range (3.3V)
TYP
MAX
UNITS
µs
µs
µs
2.5
ms
NOTES
PARAMETER
Expected Data Retention time
SYMBOL
MIN
tDR
10
TYP
MAX
(TA=+25℃)
UNITS
NOTES
years
9
Warning: Under no circumstances are negative undershoots of any amplitude allowed when device is in battery-backup mode.
www.artschip.com
10
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