Datasheet

DS1558
17 of 18
POWER-UP/DOWN CHARACTERISTICS
(V
CC

ES
= +3.3V 10%, T
A
= -40°C to +85°C.) (Figure 9)
PARAMETER SYMBOL MIN TYP MAX UNITS NOT
CE or WE at V
IH
,
Before Power-Down
t
PD
0
s
V
CC
Fall Time: V
PF(MAX)
to V
PF(MIN)
t
F
300
s
V
CC
Rise Time: V
PF(MIN)
to V
PF(MAX)
t
R
0
s
V
PF
to
RST
High
t
REC
40 200 ms
Figure 9. +3.3V POWER-UP/DOWN WAVEFORM TIMING
CAPACITANCE
(T
A
= +25C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance On All Input Pins C
IN
7 pF 1
Capacitance On IRQ /FT, RST , and
DQ Pins
C
IO
10 pF 1