
DS1647/DS1647P
10 of 12
AC ELECTRICAL CHARACTERISTICS—POWER-UP/POWER-DOWN TIMING
(VCC = 5.0V ±10%, TA = 0°C to +70°C.)
PARAMETER
SYMBOL MIN
TYP
MAX
UNITS NOTES
CE
or WE at VIH before Power-Down
tPD
0
s
VPF (MAX) to VPF (MIN) VCC Fall Time
tF
300
s
VPF (MIN) to VSO VCC Fall Time
tFB
10
s
VSO to VPF (MIN) VCC Rise Time
tRB
1
s
VPF (MIN) to VPF (MAX) VCC Rise Time
tR
0
s
Power-Up
tREC
15
35
ms
Expected Data-Retention Time +25°C
(Oscillator On)
tDR
10
years
4
POWER-DOWN/POWER-UP TIMING
OUTPUT LOAD