Rainbow Electronics DS1642 - Manual (Page 9)

DS1642
9 of 11
POWER-UP/DOWN AC CHARACTERISTICS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CE or WE at V
IH
Before Power-down
t
PD
0 µs
V
CC
Fall Time: V
PF
(MAX) to
V
PF
(Min)
t
F
300 µs
V
CC
Fall Time: V
PF
(MIN) to V
BAT
t
FB
10 µs
V
CC
Rise Time: V
PF
(MIN) to
V
PF
(MAX)
t
R
0 µs
Power-up Recover Time t
REC
35 ms
Expected Data Retention Time
(Oscillator On) t
DR
10 years 4, 5
POWER-UP/DOWN WAVEFORM TIMING
CAPACITANCE (t
A
= 25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance on all pins (except DQ) C
IN
7 pF
Capacitance on DQ pins C
O
10 pF