
DS1315 Phantom Time Chip
17 of 21
Figure 12. 5V Power-Down Condition
3.3V DEVICE POWER-UP POWER-DOWN CHARACTERISTICS—
ROM/RAM = VCCO OR GND
(TA = 0°C to +70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Recovery Time at Power-Up
tREC
1.5
2.5
ms
12
VCC Slew Rate
Power-Down
VPF(max) to VPF(min)
tF
300
s
12
VCC Slew Rate
Power-Up
VPF(min) to VPF(max)
tR
0
s
12
CEI
High to Power-Fail
tPF
0
s
12
CEI
Propagation Delay
tPD
10
ns
2, 3, 11