SP6339 Datasheet, PDF (6/13 Pages) Sipex Corporation – Triple μPower Supervisory Circuit with Manual Reset and Watchdog

V1
V2
V3
Band
Gap
Ref
1.25V
0.5V
THEORY OF OPERATION
WDI
WDI
LOGIC
OSC
CONTROL
LOGIC
WDOB
RSTB
Block Diagram
GND
MRIB
The SP6339 and SP6341 include a low-
voltage precision bandgap reference, three
precision comparators, an oscillator, a digital
counter chain, a logic control block, trimmed
resistor divider chains and additional
supporting circuitry. The family is designed
to supervise up to 3 independent supply
voltages. V1 and V2 supply inputs have
their resistor dividers on the chip. Their trip
thresholds are factory trimmed. The V3
input allows users to customize an additional
supply threshold to be monitored by means
of an external resistor divider. The parts are
furnished with manual reset and watchdog
output functionalities. The watchdog
functionality cannot be disabled.
Nov 20-06 Rev J
SP6339-SP6341 Triple µPower Supervisory Circuit
6
© Copyright 2006 Sipex Corporation