DS1210+

Overview

The DS1210+ is a nonvolatile controller chip designed to convert standard CMOS RAM into nonvolatile memory. It operates with a supply voltage range of 4.75V to 5.5V and consumes less than 100nA of battery current during backup. The device features an 8-pin PDIP package and supports redundant batteries for enhanced reliability. It includes power-fail detection, write protection, and battery status monitoring functions.

Feature Summary

• Converts CMOS RAM into nonvolatile memory by managing power switching between the main supply and backup batteries.
• Unconditionally inhibits write operations when the incoming supply voltage falls out of tolerance.
• Tests battery condition upon power-up to prevent data loss from low battery voltage.
• Supports redundant battery configurations using two separate battery inputs.

Applications

• Microprocessor-based systems requiring persistent data storage
• Battery-backed SRAM applications
• Systems needing automatic processor reset on power failure

Procurement Notes

Verify the specific package variant required, as the base model number covers multiple temperature ranges and packages. Confirm RoHS compliance status via the datasheet ordering information. Check for end-of-life or limited availability notices from authorized distributors before finalizing procurement plans.

Selection Notes

Select the DS1210N+ variant if operation in industrial temperatures ranging from -40°C to +85°C is required. For commercial applications within 0°C to +70°C, the standard DS1210+ is suitable. Ensure the chosen package matches the PCB layout constraints, either 8-pin PDIP or 16-pin SO.

Part Context

The DS1210 belongs to a family of nonvolatile controllers manufactured by Analog Devices / Maxim Integrated. These chips are specifically engineered to provide seamless battery backup solutions for volatile memory components in embedded systems.

Replacement Considerations

DS1210N+

FAQ

How does the DS1210 protect data during a power failure?

It monitors the incoming supply voltage and automatically switches to a backup battery while inhibiting the chip enable output to prevent writes.

What is the maximum propagation delay for the Chip Enable signal?

The maximum propagation delay from CE input to CEO output is 20ns under nominal supply conditions.