This IC is a compact, high-precision system reset IC with a watchdog timer. It monitors a system and automatically resets the system with a reset signal on detection of an abnormality, thereby preventing uncontrolled breakdown.
The IC has a feature whereby it is possible to select a ratio between a watchdog timer monitor time (TWD) and a power on reset time (TPR) by fixing the SELECT terminal H or L.
The detection voltages are ranked in 0.1V steps in a 1.8 to 4.2V range. Also, by switching the INH terminal to H or L, the watchdog timer function can be switched OFF/ON. When the timer function is OFF, only a drop in the power voltage will be detected.
The IC is available as VSOP-8D (MM3527) and VSOP-8C (MM3601) packages.

1.	Watchdog timer included
2.	Current consumption 1 (INH terminal = H)	: 8 µA typ.
3.	Current consumption 2 (INH terminal = L)	: 3.5 µA typ.
4.	Detection voltage	: 1.8 to 4.2V (0.1V STEP)
5.	Operating temperature range (MM3527 Series)	: -40 to +105ºC
	Operating temperature range (MM3601 Series)	: -30 to +85ºC
6.	Compact package VSOP-8D (MM3527 Series), VSOP-8C (MM3601 Series)

Power Supply Voltage	1.8 to 6.0V
Current consumption 1	8µA typ. /15µA max.
Current consumption 2	3.5µA typ. /6µA max.
Detection voltage	1.8 to 4.2V ±1.2% (0.1V STEP)
Detection voltage temperature coefficient	100ppm / ºC typ.
WDT monitoring time	0.2×Ct ms typ.
Power on reset time (SEL=L)	0.018×Ct ms typ.
Power on reset time (SEL=H)	0.2×Ct ms typ.
Reset time	1.8ms typ./1.3ms min./2.3ms max.
Reset delay time	10 µs typ.
External dimensions	2.80×4.00×1.10 (VSOP-8D) 2.95×4.00×1.10 (VSOP-8C) (unit:mm)