DS1239 Datasheet Micromanager Chip

Manufacturer: DALLAS

Overview: DS1239 MicroManager Chip www.dalsemi.com.

Datasheet Details

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

General 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 provides all the necessary functions for power supply control and monitoring, reset control, and memory backup in microprocessor-based systems.

Using the DS1239, an AC power switch is no longer required for microprocessor-based syst

Key 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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