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| DS1643 Datasheet, PDF (11/17 Pages) Dallas Semiconductor – Nonvolatile Timekeeping RAM | |||
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DS1643/DS1643P
POWER-UP/DOWN AC CHARACTERISTICS
(VCC = 5.0V ï±10%, TA = 0ï°C to +70ï°C.)
PARAMETER
SYMBOL MIN
CE or WE at VIH, CE2 at VIL, Before
Power-down
VCC Fall Time: VPF(MAX) to VPF(MIN)
VCC Fall Time: VPF(MIN) to VBAT
VCC Rise Time: VPF(MIN) to VPF(MAX)
Power-Up Recover Time
Expected Data Retention Time
(Oscillator On)
tPD
0
tF
300
tFB
10
tR
0
tREC
tDR
10
TYP
MAX
35
UNITS NOTES
ïs
ïs
ïs
ïs
ms
years 5, 6
POWER-UP/POWER-DOWN TIMING
CAPACITANCE
(TA = +25ï°C)
PARAMETER
Capacitance on All Pins
Capacitance on All Output Pins
SYMBOL
CIN
CO
MIN
TYP
MAX
7
10
UNITS
pF
pF
NOTES
11 of 17
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