DS1312S-2/T&R

Controllers Overview

The DS1312S-2/T&R is a nonvolatile memory controller in an 8-pin SOIC package. It converts CMOS SRAM into nonvolatile memory by monitoring VCCI for out-of-tolerance conditions and automatically switching to a lithium battery backup supply upon power failure. The device features a Battery Warning output that signals low-battery conditions based on periodic loaded-voltage measurements. Operating voltage ranges from 4.5V to 5.5V, with operating currents of 50µA (CMOS inputs) or 200µA (TTL inputs). It supports an industrial temperature range of -40°C to +85°C.

Controllers Feature Summary

• Converts CMOS SRAM into nonvolatile memory via automatic battery backup switching
• Monitors lithium cell voltage and provides advanced warning of impending battery failure
• Unconditionally write-protects SRAM when VCC is out of tolerance

Controllers Applications

• Battery backup systems for CMOS RAM
• Lithium battery monitoring circuits
• Power-fail detection and protection

Controllers Procurement Notes

Verify the specific suffix T&R indicates tape-and-reel packaging. Confirm the S-2 designation corresponds to the 8-pin SOIC variant. Ensure compatibility with the required voltage range and temperature specifications for the target application environment before procurement.

Controllers Selection Notes

Select this component for applications requiring nonvolatile memory conversion without complex external circuitry. Consider the 8-pin SOIC package constraint versus other available pinouts. Evaluate the need for battery warning signals and power-fail reset capabilities inherent to this controller family.

Controllers Part Context

This part belongs to the DS1312 series of nonvolatile controllers manufactured by Analog Devices Inc./Maxim Integrated. The series includes variants in DIP, SOIC, and TSSOP packages. The DS1312S-2 specifically denotes the 8-pin SOIC version within this product line.

Controllers Replacement Considerations

DS1312S+ is a direct replacement offering the same functionality in a 16-pin SOIC package.