DS1210SN

Overview

The DS1210SN+ is a nonvolatile controller chip designed to convert standard CMOS RAM into nonvolatile memory. It operates within a supply voltage range of 4.75V to 5.5V and consumes less than 100nA of battery current. The device features an optional industrial temperature range from -40°C to +85°C and supports redundant batteries for enhanced reliability. It provides unconditionally write protection when VCC is out-of-tolerance and automatically switches to battery backup during power failures.

Feature Summary

• Converts CMOS RAM into nonvolatile memory by monitoring incoming power and switching to battery backup upon failure.
• Unconditionally write protects the connected memory when the supply voltage is out-of-tolerance.
• Supports redundant batteries with internal isolation switches to ensure data integrity.
• Tests battery condition on power-up to prevent potential data loss.

Applications

• Microprocessor-based systems requiring nonvolatile storage
• Battery-backed SRAM applications
• Industrial control environments

Procurement Notes

Verify that the component matches the specific industrial temperature grade (-40°C to +85°C) required for your application, as commercial variants exist. Confirm the package type is the 16-pin SOIC (SO) variant. Ensure the ordering suffix includes the '+' designation if lead-free compliance is necessary. Cross-reference the datasheet revision history for any updates to absolute maximum ratings or pin assignments before finalizing procurement.

Selection Notes

Select this controller when integrating standard CMOS RAM requires automatic nonvolatile functionality without complex external circuitry. Consider the DS1210SN+ specifically for designs needing the wider industrial temperature range compared to the commercial version. Evaluate the need for redundant battery support; if only one battery is used, the second input must be grounded. Ensure the system design accommodates the low forward voltage drop on the VCC switch.

Part Context

The DS1210SN+ belongs to the Maxim Integrated (now Analog Devices) DS1210 series of nonvolatile controllers. This family focuses on simplifying the implementation of battery-backed memory in embedded systems. The 'N' suffix indicates the industrial temperature rating, while the 'S' denotes the 16-lead Small Outline package. These components are widely used in legacy microprocessor architectures where data retention during power interruptions is critical.

Replacement Considerations

DS1210S+