MM1075 Datasheet, PDF (4/10 Pages) Mitsumi Electronics, Corp. – System Reset (with built-in watchdog timer) Monolithic IC

MITSUMI
System Reset (with built-in watchdog timer) MM1075
(mS)
100
80
TWD ⁶⁰
40
20
0
50k 100k
1M
10M
100M ∞ (Ω)
RCT
Graph 1 RCT & Monitoring Time
Note : The above graph shows data for when CT=0.1µF.
TWD is proportionate to CT. Refer to the calculation formula for TWD above.
Block Diagram
Note 1 : CP=0.1µF approx.
Note 2 : C- ^~1000pF
Note 3 : The watchdog timer can be stopped by connecting the RCT pin to
GND. (Then it functions as a voltage detection circuit.)
Note 4 : TPR and TWD can be varied by pulling up the RCT pin to VCC with a
resistor. The recommended range for RCT is 100kΩ~RCT pin OPEN.