DS1314E+

Overview

The DS1314E+ is a nonvolatile SRAM controller in a 20-pin TSSOP package. It operates within a supply voltage range of 2.7V to 3.6V and supports an industrial temperature range from -40°C to +85°C. The device converts CMOS SRAM into nonvolatile memory by automatically switching to a lithium battery backup during power failures. It features unconditionally write-protects the SRAM when VCC is out of tolerance, monitors lithium cell voltage for advanced warning of impending failure, and provides a Battery Warning output signal.

Feature Summary

• Converts CMOS SRAM into nonvolatile memory with automatic battery backup switching
• Unconditionally write-protects SRAM when VCC is out of tolerance
• Monitors lithium cell voltage and signals low-battery condition on active low Battery Warning output
• Includes reset processor functionality during power failure and system power-up

Applications

• Battery backup support for SRAM modules
• Lithium battery monitoring in nonvolatile memory systems
• Processor reset generation during power failure events

Procurement Notes

Verify the specific package type (TSSOP) and RoHS compliance status (+ suffix) against the manufacturer's current ordering information. Confirm that the operating voltage requirements align with the target system design. Check for any recent product change notices or end-of-life announcements from Analog Devices/Maxim Integrated before finalizing procurement plans.

Selection Notes

Select this component when a reliable nonvolatile memory solution is required for CMOS SRAM applications. Ensure the system design accommodates the 20-pin TSSOP footprint and meets the specified industrial temperature range. Consider the battery monitoring capabilities if long-term data retention without frequent power cycles is critical.

Part Context

The DS1314 series includes various packages such as 8-pin DIP, 8-pin SOIC, 16-pin SOIC, and 20-pin TSSOP. The DS1314E+ specifically refers to the 20-pin TSSOP variant. This family of devices is designed to provide robust power management and data protection for nonvolatile memory applications in industrial environments.

Replacement Considerations

DS1314S+

FAQ

How does the DS1314E+ handle write protection during power failure?

It unconditionally write-protects the SRAM by inhibiting the chip enable output when VCC is detected to be out of tolerance.

What is the function of the Battery Warning (BW) pin?

The BW pin is an active-low open-drain output that signals an impending battery failure when the monitored lithium cell voltage falls below a factory-programmed trip point.