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DS1558 Datasheet, PDF (17/18 Pages) Dallas Semiconductor – Watchdog Clock with NV RAM Control
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POWER-UP/DOWN CHARACTERISTICS
(VCC = +3.3V ±10%, TA = -40°C to +85°C.) (Figure 9)
PARAMETER
SYMBOL MIN
CE or WE at VIH,
Before Power-Down
VCC Fall Time: VPF(MAX) to VPF(MIN)
tPD
0
tF
300
VCC Rise Time: VPF(MIN) to VPF(MAX)
tR
0
VPF to RST High
tREC
40
DS1558
TYP MAX UNITS NOTES
ms
ms
ms
200
ms
Figure 9. +3.3V POWER-UP/DOWN WAVEFORM TIMING
CAPACITANCE
(TA = +25°C)
PARAMETER
Capacitance On All Input Pins
Capacitance On IRQ /FT, RST , and
DQ Pins
SYMBOL
CIN
CIO
MIN
TYP
MAX
7
UNITS
pF
NOTES
1
10
pF
1
17 of 18
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