Rainbow Electronics DS1643P - Manual (Page 9)

DS1643/DS1643P
9 of 14
POWER-UP/DOWN AC CHARACTERISTICS (0
°
C to 70
°
C; V
CC
= 5.0V
± =10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CE or WE at V
IH
, CE2 at V
IL
, Before
Power-down
t
PD
0
µ
s
V
CC
Fall Time: V
PF
(MAX) to V
PF
(MIN) t
F
300
µ
s
V
CC
Fall Time: V
PF
(MIN) to V
BAT
t
FB
10
µ
s
V
CC
Rise Time: V
PF
(MIN) to V
PF
(MAX) t
R
0
µ
s
Power-up Recover Time t
REC
35 ms
Expected Data Retention Time
(Oscillator On) t
DR
10 years 5, 6
POWER-UP/POWER-DOWN TIMING
CAPACITANCE (t
A
= 25
°
C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance on all pins C
IN
7 pF
Capacitance on all output pins C
O
10 pF