Rainbow Electronics DS1687 - Manual (Page 33)

DS1685/DS1687
33 of 38
POWER-UP/DOWN TIMING, 5V (T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CS High to Power-Fail t
PF
0 ns
Recovery at Power-Up t
REC
150 ms
V
CC
Slew Rate Power-Down
t
F
4.0 £ V
CC
£ 4.5V
300 ms
V
CC
Slew Rate Power-Down
t
FB
3.0 £ V
CC
£ 4.0V
10 ms
V
CC
Slew Rate Power-Up
t
R
4.5V ³ V
CC
³ 4.0V
0 ms
Expected Data Retention t
DR
10 years 10, 11
POWER-UP/DOWN TIMING, 3V (T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CS High to Power-Fail t
PF
0 ns
Recovery at Power-Up t
REC
150 ms
V
CC
Slew Rate Power-Down
t
F
2.6 £ V
CC
£ 2.7V
300 ms
V
CC
Slew Rate Power-Up
t
R
2.7V ³ V
CC
³ 2.6V
0 ms
Expected Data Retention t
DR
10 years 10, 11
Warning: Under no circumstances are negative undershoots, of any amplitude, allowed when device is
in battery-backup mode.
CAPACITANCE (T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
IN
12 pF
Output Capacitance C
OUT
12 pF
WAKE-UP/KICKSTART TIMING (T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Kickstart Input Pulse Width t
KSPW
2 ms
Wake-Up/Kickstart Power
On Timeout
t
POTO
2 seconds 8