DS1210N

Overview

The DS1210N+ 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 5mA of working power current. The device supports an industrial temperature range from -40°C to +85°C and is housed in an 8-pin PDIP package. Key electrical parameters include a battery current consumption of less than 100nA, a maximum propagation delay of 20ns for the Chip Enable signal, and a typical forward voltage drop of less than 0.3V on the VCC switch.

Feature Summary

• Converts CMOS RAM into nonvolatile memory by monitoring incoming power and automatically switching to battery backup during power failures.
• Unconditionally write-protects the connected memory when the supply voltage is out of tolerance, preventing data corruption.
• Tests battery condition upon power-up to warn of potential data loss if battery voltage falls below 2.0 volts.
• Provides support for redundant batteries with internal isolation switches to ensure reliability.

Applications

• Microprocessor-based systems requiring data retention during power interruptions
• Battery-backed SRAM configurations
• Industrial control applications needing wide temperature operation

Procurement Notes

Verify that the specific part number matches the required industrial temperature grade (-40°C to +85°C) indicated by the 'N' suffix. Confirm RoHS compliance status as denoted by the '+' suffix. Ensure the 8-pin PDIP package footprint aligns with the target PCB design. Check for end-of-life or obsolescence status prior to finalizing procurement plans.

Selection Notes

Select this component when converting external CMOS RAM to nonvolatile storage is required. Choose the N variant for industrial temperature environments. Verify that the system's memory interface timing meets the 20ns maximum propagation delay requirement. Ensure the application can accommodate the necessary battery connections for backup functionality.

Part Context

The DS1210 belongs to the Maxim Integrated (now Analog Devices) family of nonvolatile controllers. These devices are specifically engineered to manage power transitions between main supplies and backup batteries. The N suffix denotes the industrial temperature extension compared to commercial variants.

Replacement Considerations

Public confirmed substitute part numbers: None available.