DS1314E

Controllers Overview

The DS1314E+ is a CMOS nonvolatile controller designed to convert standard CMOS SRAM into nonvolatile memory. It operates within an industrial temperature range of -40°C to +85°C and supports supply voltages from 2.7V to 3.6V depending on the TOL pin configuration. The device features a 20-pin TSSOP package and includes a lithium battery monitor that provides advanced warning of impending battery failure via an open-drain output. It automatically switches to battery backup during power failures and unconditionally write-protects the SRAM when VCC is out of tolerance.

Controllers Feature Summary

• Converts CMOS SRAM into nonvolatile memory by managing power switching between system supply and backup battery
• Monitors lithium cell voltage and signals low-battery conditions through an active-low open-drain output
• Unconditionally write-protects SRAM when VCC is out of tolerance to prevent data corruption
• Includes reset functionality for processor-based systems, holding the processor in reset during power-up

Controllers Applications

• Battery backup support for SRAM modules
• Lithium battery monitoring in nonvolatile memory applications
• Processor-based systems requiring power-fail detection and reset generation

Controllers Procurement Notes

Verify the specific ordering suffix to confirm package type and RoHS compliance status, as the base part number covers multiple variants. Confirm the TOL pin configuration requirements for your target supply voltage (3.0V or 3.3V) to ensure correct trip point operation. Check for availability constraints as this component may have limited stock or discontinuation notices from Analog Devices/Maxim Integrated.

Controllers Selection Notes

Select the DS1314E+ variant specifically for designs requiring the 20-pin TSSOP package. Ensure the application utilizes a 3.0V or 3.3V system supply, as the device is optimized for these levels. Consider the TOL pin connection to set the appropriate VCC trip point threshold. Verify that the connected SRAM can be powered by the VCCO output current capabilities specified in the datasheet.

Controllers Part Context

The DS1314 series includes multiple package options: 8-pin DIP, 8-pin SOIC, 16-pin SOIC, and 20-pin TSSOP. The DS1314E+ specifically denotes the 20-pin TSSOP version with lead-free/RoHS-compliant packaging. Other variants like DS1314S-2 offer 8-pin SOIC packages without the reset pin functionality found in the E and S versions.

Controllers Replacement Considerations

DS1314S+ (16-pin SOIC), DS1314S-2+ (8-pin SOIC), DS1314+ (8-pin PDIP). These are functionally similar but differ in package type and pin count.