DS1321 - Flexible Nonvolatile Controller

Maxim Integrated

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Datasheet Details

Part number	DS1321
Manufacturer	Maxim Integrated
File Size	528.18 KB
Description	Flexible Nonvolatile Controller
Datasheet	DS1321-MaximIntegrated.pdf

DS1321 Product details

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 - Mode Input GND - Ground NC - No Connection VCCO VBAT TOL CEI1 CEI2 NC A/CEI3 B/CEI4 NC GND 1 2 3 4 5 6 7 8 9 10 20 VCCI 19 RST 18 BW 17 CEO1 16 CEO2 15 NC 14 CEO3 13 CEO4 12 NC 11 MODE DS1321E 20-

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.

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Published: Mar 27, 2020 |