DS1232LP/LPS
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, 9
V
CC
Fail Detect to RST and RST
t
RPD
50 175
µs
V
CC
Slew Rate 4.75V to 4.25V t
F
300
µs
V
CC
Detect to RST and RST Inactive
t
RPU
250 610 1000 ms 4
V
CC
Slew Rate 4.25V to 4.75V t
R
0ns
PBRST Stable Low to RST and RST
t
PDLY
20 ms
NOTES:
1. All voltages referenced to ground.
2. Measured with outputs open and ST and PBRST within 0.5V of supply rails.
3. PBRST is internally pulled up to V
CC
with an internal impedance of 40k 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. Measured with outputs open and ST and PBRST at TTL levels.
9. Watchdog can not be disabled. It must be strobed to avoid resets.
MARKING INFORMATION:
8-pin DIP - “DS1232L”
16-pin SOIC - “DS1232L”
8-pin SOIC - “DS1232L”
8-pin µ-SOP - “1232”
