DS1232/DS1232S
7 of 7
AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; V
CC
=5V ± 10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
PBRST = V
IL
t
PB
20 ms
RESET Active Time t
RST
250 610 1000 ms
ST Pulse Width
t
ST
20 ns 6, 8
V
CC
Fail Detect to RST and RST
t
RPD
100 175
μs
V
CC
Slew Rate 4.75V to 4.25V t
F
300
μs
V
CC
Detect to RST and RST Transition
t
RPU
250 610 1000 ms 4
V
CC
Slew Rate 4.25V to 4.75V t
R
0 5
μs
PBRST Stable Low to RST and RST
t
PDLY
20 ms
NOTES:
1. All voltages referenced to ground.
2. Measured with outputs open.
3. PBRST is internally pulled up to V
CC
with an internal impedance of 10k typical.
4. t
R
= 5 μs.
5. RST is an open-drain output.
6. Must not exceed t
TD
minimum. See Table 1.
7. RST remains within 0.5V of V
CC
on power-down until V
CC
drops below 2.0V. RST remains within
0.5V of GND on power-down until V
CC
drops below 2.0V.
8. Watchdog can not be disabled. It must be strobed to avoid resets.
