DS1244Y-150 Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
DS1244Y-150 Datasheet PDF : 12 Pages
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DS1244Y
PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
TYP
Read Cycle Time
CE Access Time
OE Access Time
CE to Output Low Z
OE to Output Low Z
CE to Output High Z
OE to Output High Z
Read Recovery
Write Cycle Time
Write Pulse Width
Write Recovery
Data Setup Time
Data Hold Time
CE Pulse Width
RESET Pulse Width
CE High to Power–Fail
tRC
120
tCO
tOE
tCOE
10
tOEE
10
tOD
tODO
tRR
20
tWC
120
tWP
100
tWR
20
tDS
40
tDH
10
tCW
100
tRST
200
tPF
(0°C to 70°C; VCC = 4.5 to 5.5V)
MAX
UNITS NOTES
ns
100
ns
100
ns
ns
ns
40
ns
5
40
ns
5
ns
ns
ns
ns
10
ns
11
ns
11
ns
ns
0
ns
POWER-DOWN/POWER-UP TIMING
PARAMETER
SYMBOL MIN
TYP
MAX
UNITS NOTES
CE at VIH before Power–Down
tPD
0
VCC Slew from 4.5V to 0V
(CE at VIH)
tF
300
VCC Slew from 0V to 4.5V
(CE at VIH)
tR
0
CE at VIH after Power–Up
tREC
µs
µs
µs
2
ms
PARAMETER
(tA = 25°C)
SYMBOL MIN
TYP
MAX
UNITS NOTES
Expected Data Retention Time
tDR
10
years
9
WARNING:
Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery backup mode.
032697 7/12
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