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SP6339 Datasheet(PDF) 6 Page - Sipex Corporation

Part No. SP6339
Description  Triple μPower Supervisory Circuit with Manual Reset and Watchdog
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP6339 Datasheet(HTML) 6 Page - Sipex Corporation

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Nov 20-06 Rev J
SP6339-SP6341 Triple µPower Supervisory Circuit
© Copyright 2006 Sipex Corporation
6
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.
Block Diagram
THEORY OF OPERATION
OSC
WDI
LOGIC
CONTROL
LOGIC
V1
V2
V3
WDI
RSTB
GND
1.25V
0.5V
MRIB
WDOB
Band
Gap
Ref


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