SUPPLY VOLTAGE
MONITOR
ISSUE 1 鈥?NOVEMBER 1995
DEVICE DESCRIPTION
The ZSM530 is a three terminal under
v o l t a g e mo ni t or ci r cui t f or us e i n
microprocessor systems. The threshold
voltage of the device has been set to 4.3 volts
making it ideal for 5 volt circuits.
Included in the device is a precise voltage
reference and a comparator with built in
hysteresis to prevent erratic operation. The
ZSM530 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 providing a power on reset function.
Should the supply voltage, once established,
at any time drop below the threshold level
then the output again will pull low.
The device is available in a TO92 package for
through hole applications as well as SO8 and
SOT223 for surface mount requirements.
ZSM530
FEATURES