SUPPLY
VOLTAGE MONITOR
ISSUE 1 – NOVEMBER 1995 DEVICE DESCRIPTION
The ZSM330 is a three terminal under vo l ta ge mo ni t or ci rc ui t f or use i n microprocessor systems.
The threshold
voltage of the device has been set to 3.
1 volts making it ideal for 3.
3 volt circuits.
Included in the device is a precise
voltage reference and a comparator with built in hysteresis to prevent erratic operation.
The ZSM330 features an open collector output capable of sinking at least l0mA which only requires a single external resistor to interface to following circuits.
Operation of the device is guaranteed from one volt upwards, from this level to the device threshold
voltage the output is held low providi...