DS1210SN/T&R

Controllers Overview

The DS1210SN/T&R is a nonvolatile controller chip designed to convert standard CMOS RAM into nonvolatile memory. It operates within a supply voltage range of 4.5V to 5.5V, depending on the TOL pin configuration. The device consumes less than 100nA in battery mode and supports an industrial temperature range from -40°C to +85°C. It features automatic power-fail detection, unconditional write protection, and battery redundancy capabilities.

Controllers Feature Summary

• Converts CMOS RAM into nonvolatile memory by monitoring incoming power for out-of-tolerance conditions
• Automatically switches to battery backup when power failure occurs while inhibiting chip enable for write protection
• Tests battery condition on power-up to prevent data loss if voltage falls below 2.0 volts
• Provides internal isolation switch allowing connection of two batteries for redundancy

Controllers Applications

• Microprocessor-based systems requiring battery-backed SRAM
• Applications demanding unconditional write protection during power failures
• Systems utilizing redundant battery configurations for critical data integrity

Controllers Procurement Notes

Verify the specific package variant required, as the SN suffix denotes the 16-pin SO package with industrial temperature rating. Confirm RoHS compliance status based on the '+' suffix presence. Check current availability as this component may be subject to limited supply or end-of-life restrictions.

Controllers Selection Notes

Select the DS1210SN/T&R when industrial temperature operation (-40°C to +85°C) is required alongside a surface-mount 16-pin SO package. Ensure the application utilizes CMOS RAM compatible with the specified voltage ranges. Consider the TOL pin configuration to set the appropriate power-fail detection threshold for the system design.

Controllers Part Context

This component belongs to the DS1210 series of nonvolatile controllers manufactured by Analog Devices / Maxim Integrated. It is part of a family of chips designed to simplify the implementation of nonvolatile memory solutions using standard volatile RAM components and external batteries.

Controllers Replacement Considerations

DS1210SN+ (Tube packaging)

Controllers FAQ

How does the DS1210 handle battery redundancy?

The DS1210 contains an internal isolation switch that allows the connection of two batteries. During backup operation, it selects the battery with the highest voltage. If one fails, the other takes over transparently.

What is the function of the TOL pin?

The TOL pin sets the power-fail detection threshold. Grounding it sets the trip point between 4.5V and 4.74V, while connecting it to VCCO sets the trip point between 4.25V and 4.49V.