DS1314S-2+T&R

Overview

The DS1314S-2+T&R is a CMOS nonvolatile memory controller with an integrated lithium battery monitor, designed to convert standard CMOS SRAM into nonvolatile memory. It operates within an industrial temperature range of -40°C to +85°C and utilizes an 8-pin SOIC package. The device monitors the VCCI supply for out-of-tolerance conditions, automatically switching to a backup battery supply upon power failure while inhibiting chip enable to write-protect the SRAM. It features automatic power-fail detection for 3.0V or 3.3V supplies and includes a Battery Warning output to signal impending battery depletion.

Feature Summary

• Converts CMOS SRAM into nonvolatile memory by managing power sources and write protection
• Monitors lithium cell voltage and signals low-battery conditions via an active-low open-drain output
• Automatically switches to battery backup when main power fails and unconditionally write-protects SRAM during out-of-tolerance events

Applications

• Battery-backed SRAM modules requiring data retention during power loss
• Systems needing advanced warning of lithium battery end-of-life
• Processor-based systems requiring power-fail detection and reset signaling

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as supply may be limited. Ensure the selected variant matches the required pin count and thermal specifications for the target application environment.

Selection Notes

Select this component for applications requiring reliable conversion of volatile SRAM to nonvolatile storage with minimal standby current. Consider the 8-pin SOIC form factor for space-constrained designs. Evaluate the need for processor reset functionality, noting that this specific 8-pin variant lacks the RST pin found in larger packages.

Part Context

This part belongs to the DS1314 family of nonvolatile controllers manufactured by Analog Devices (formerly Maxim Integrated). The family offers various package options including 8-pin DIP/SOIC, 16-pin SOIC, and 20-pin TSSOP. The DS1314S-2 specifically denotes the 8-pin SOIC version without the processor reset output available in higher pin-count variants.

Replacement Considerations

Direct substitutes include other members of the DS1314 family such as the DS1314S+ (16-pin SOIC) or DS1314E+ (20-pin TSSOP), provided pin compatibility and reset requirements are addressed.