DS1239 - MicroManager Chip

DS1239 Datasheet Preview — Preview of DS1239 PDF

Datasheet Details

Part number	DS1239
Manufacturer	DALLAS
File Size	56.43 KB
Description	MicroManager Chip
Datasheet	DS1239_DALLAS.pdf

DS1239 Product details

Description

VBAT VCCO VCC GND PF PF WC/ SC PSI IN NMI ST CEO CEI PBRST RST PSO - +3 Volt Battery Input - Switched SRAM Supply Output - +5 Volt Power Supply Input - Ground - Power Fail (Active High) - Power Fail (Active Low) - Wake-Up Control (Sleep) - Power Supply Control Input - Early Warning Input - Non-Maskable Interrupt - Strobe Input - Chip Enable Output - Chip Enable Input - Pushbutton Reset Input - Reset Output (Active low) - Power Supply Control Outputs DESCRIPTION The DS1239 MicroManager provi

Features

Provides necessary control for start up and shutdown of power supply from keyboard Holds microprocessor in check during power transients Halts and restarts an out-of-control microprocessor Monitors push button for external override Warns microprocessor of an impending power failure Converts CMOS SRAM into nonvolatile memory Unconditionally write-protects memory when power supply is out of tolerance Consumes less than 100 nA of battery current Controls external power switch for high current appli.

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Published: Jun 10, 2005 |