DS1238A Dallas, DS1238A Datasheet - Page 12

• Manufacturer Part Number: DS1238A
• 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 Int Clock
Long period
Short period
Watchdog Time Delay, Ext
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
t
RPD
RST
RPU
REC
OSC
FPU
FB1
IPD
PPF
t
t
OUT
PB
PD
CE
TD
TD
ST
CF
R
F
IN
12 of 13
MIN
MIN
300
110
0.1
1.7
40
40
40
20
30
40
10
7
0
0
20480
TYP
5120
TYP
100
100
100
170
2.7
(0 C to 70 C; V
85
12
MAX
MAX
175
175
150
144
100
150
250
20
5
2
5
7
UNITS
UNITS
CC
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
DS1238A
10%)
13
11
5
7
8