Datasheet

DS1231/S
022698 8/9
AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; V
CC
= 5V + 10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
V
TP
to NMI Delay t
IPD
1.1 µs
V
CC
Slew Rate 4.75-4.25V t
F
300 µs
V
CC
Detect to RST and RST t
RPD
100 ns
V
CC
Detect to NMI t
IPU
200 µs 4
V
CC
Detect to RST and RST t
RPU
150 500 1000 ms 4
V
CC
Slew Rate 4.25-4.75V t
R
0 ns
NOTES:
1. All voltages referenced to ground.
2. V
CC
= +5.0 volts with outputs open.
3. Measured with outputs open.
4. t
R
= 5 µs.
5. RST
is an open drain output and requires a pull–up resister.
6. 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.
TIMING DIAGRAM: POWER-UP
V
TP
t
R
MODE=V
CC
t
RPU
V
CC
NMI
INPUT PIN 1
MODE=GND
4.5V
4.25V
4.75V
t
IPU
V
OH
V
OH
V
OL
RST
RST