Datasheet

DS1558
16 of 18
(V
C
, T
A
t
ARAMETE SYMBOL IN TYP MAX UNITS NOTES
POWER-UP/DOWN CHARACTERISTICS
C
= +5V 10% = -40°C o +85°C.) (Figure 8)
P R M
CE or WE at V
IH
,
Before Power-Down
t 0
s
PD
V e: V
PF(MAX)
to
MIN)
s
CC
Fall Tim V
PF(
t
F
300
V
CC
Fall Time: V
PF(MIN)
to V
SO
10
s
t
FB
V
CC
Rise Time: V
PF(MIN)
to
MAX)
t 0
s
V
PF( R
V
PF
to RST High
t
REC
40 200 ms
Figure 8. +5V POWER-UP/DOWN WAVEFORM TIMING