DS1321 Datasheet PDF - Maxim Integrated Flexible Nonvolatile Controller Specs

DS1321 - Flexible Nonvolatile Controller

Datasheet Summary

Description

VCCI VCCO VBAT A, B - +5V Power Supply Input - SRAM Power Supply Output - Backup Battery Input - Address Inputs CEI1 - CEI4 - Chip Enable Inputs CEO1 - CEO4 - Chip Enable Outputs TOL - VCC Tolerance Select BW - Battery Warning Output (Open Drain) RST - Reset Output (Open Drain) MODE - Mod

Features

Converts CMOS SRAM into nonvolatile memory.
Unconditionally write-protects SRAM when VCC is out of tolerance.
Automatically switches to battery backup supply when VCC power failure occurs.
Flexible memory organization - Mode 0: 4 banks with 1 SRAM each - Mode 1: 2 banks with 2 SRAMs each - Mode 2: 1 bank with 4 SRAMs each.
Monitors voltage of a lithium cell and provides advanced warning of impending battery failure.
Signals low-battery condition on active low Batte.

Datasheet Details

Part number	DS1321
Manufacturer	Maxim Integrated
File Size	528.18 KB
Description	Flexible Nonvolatile Controller
Datasheet	DS1321 Datasheet
Additional preview pages of the DS1321 datasheet.

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Full PDF Text Transcription

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19-6312; Rev 6/12 DS1321 Flexible Nonvolatile Controller with Lithium Battery Monitor FEATURES  Converts CMOS SRAM into nonvolatile memory  Unconditionally write-protects SRAM when VCC is out of tolerance  Automatically switches to battery backup supply when VCC power failure occurs  Flexible memory organization - Mode 0: 4 banks with 1 SRAM each - Mode 1: 2 banks with 2 SRAMs each - Mode 2: 1 bank with 4 SRAMs each  Monitors voltage of a lithium cell and provides advanced warning of impending battery failure  Signals low-battery condition on active low Battery Warning output signal  Resets processor when power failure occurs and holds processor in reset during system power-up  Optional 5% or 10% power-fail detection  16-pin PDIP, 16-pin SO and 20-pin TSSOP packages  Industrial

Published: Mar 27, 2020 |