DS1315 Datasheet, PDF (17/21 Pages) Dallas Semiconductor – Phantom Time Chip

Figure 12. 5V Power-Down Condition
DS1315 Phantom Time Chip
3.3V DEVICE POWER-UP POWER-DOWN CHARACTERISTICS—
ROM/RAM = V_CCO OR GND
(T_A = 0°C to +70°C)
PARAMETER
SYMBOL MIN TYP MAX UNITS
Recovery Time at Power-Up
t_REC
1.5
2.5
ms
V_CC Slew Rate
Power-Down
t_F
300
µs
V_PF(max) to V_PF(min)
V_CC Slew Rate
Power-Up
t_R
0
µs
V_PF(min) to V_PF(max)
CEI High to Power-Fail
t_PF
0
µs
CEI Propagation Delay
t_PD
10
ns
NOTES
12
12
12
12
2, 3, 11
17 of 21