DS1238 Dallas, DS1238 Datasheet - Page 13

• Manufacturer Part Number: DS1238
• Description: MicroManager
• Manufacturer: Dallas

AC ELECTRICAL CHARACTERISTICS
CAPACITANCE
PARAMETER
V
V
RESET Active OSCSEL=High
PBRST @ V
V
Chip Enable Prop Delay
V
V
V
V
Chip Enable Output Recovery
Time
V
Chip Enable Pulse Width
Watchdog Time Delay Internal
Clock Long period
Short Period
Watchdog Time Delay, External
Clock, after Reset
Normal
V
OSC IN Frequency
PARAMETER
Input Capacitance
Output Capacitance
ST
CC
TP
CC
CC
CC
CC
CC
CC
BAT
Pulse Width
to
Fail Detect to RST,
Slew Rate 4.75 to 4.25
Fail to Chip Enable High
Valid to RST (RC=1)
Valid to RST
Slew to 4.25 to V
Slew 4.25 to 4.75
Detect to PF
NMI
IL
BAT
RST
SYMBOL
SYMBOL
C
t
t
t
f
t
t
t
t
t
C
t
t
t
t
t
t
RPD
RST
t
RPU
REC
OSC
FPU
FB1
IPD
PPF
t
t
OUT
PB
CE
TD
TD
ST
PF
CF
R
F
IN
13 of 14
MIN
MIN
300
110
0.1
1.7
40
40
40
20
30
40
10
7
0
0
20480
TYP
5120
TYP
(0 C to 70 C; V
100
100
100
170
2.7
85
12
MAX
MAX
175
175
150
100
150
250
20
44
5
2
5
7
CC
UNITS
UNITS
clocks
clocks
kHz
ms
ms
ms
ms
pF
pF
ns
ns
ns
= 5V
s
s
s
s
s
s
s
s
s
s
(t
A
=25 C)
NOTES
NOTES
10%)
DS1238
13
11
5
7
8