MB3793-42PNF-G Datasheet, PDF (12/23 Pages) Fujitsu Component Limited. – POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER

MB3793-42
5. Clock pulse input (Positive clock pulse)
*1
CK1
*2
CK2
VH
CTW
VL
Note: The MB3793 watchdog timer monitors Clock 1 (CK1) and Clock 2 (CK2) pulses al-
ternately. When a CK2 pulse is detected after detecting a CK1 pulse, the monitor-
ing time setting capacity (CTW) switches to charging from discharging.
When two consecutive pulses occur on one side of this alternation before switch-
ing, the second pulse is ignored. In the above figure, pulses *1 and *2 are ignored.
6. Inhibition input rising and falling time
90 %
INH
10 %
tri
VCC
90 %
10 %
0V
tfi
12