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SP6334 Datasheet(PDF) 6 Page - Sipex Corporation |
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SP6334 Datasheet(HTML) 6 Page - Sipex Corporation |
6 / 13 page Nov20-06 Rev M SP6330/32/34 Quad Power Supervisory Circuit Family © Copyright 2006 Sipex Corporation 6 The SP6330, SP6332, and SP6334 include a low-voltage precision bandgap reference, four 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 4 independent supply voltages. V1 and V2 supply inputs have their resistor dividers on the chip. Their trip thresholds are factory trimmed. V3 and V4 inputs allow user to customize Block Diagram THEORY OF OPERATION two additional supply thresholds to be monitored by means of external resistor dividers. The devices also feature manual reset and watchdog functionalities. As these devices do not have watchdog outputs, the watchdog timer is serviced internally during the watchdog timeout period when WDI is left unconnected. The watchdog functionality can be disabled by leaving the WDI input floating. OSC WDI LOGIC CONTROL LOGIC V1 V2 V3 V4 WDI RSTB (RST) GND 1.25V 0.5V MRIB Bandgap Ref |
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