MXD1210EWE+

Overview

The MXD1210EWE+ is a nonvolatile RAM controller manufactured by Analog Devices Inc./Maxim Integrated. It converts standard volatile CMOS RAM into nonvolatile memory and monitors the power supply to provide write protection during marginal conditions. The device operates within a voltage range of 4.5V to 5.5V and draws 230µA in operating mode. It features battery backup capability with a quiescent current of 2nA, supports optional redundant batteries, and includes a battery freshness seal function. The component is housed in a 16-pin Wide SO package and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Battery Backup
• Memory Write Protection
• Battery Freshness Seal
• Optional Redundant Battery

Applications

• Microprocessor Systems
• Computers
• Embedded Systems

Procurement Notes

Verify the specific suffix EWE+ corresponds to the 16-pin Wide SOIC package and the -40°C to +85°C extended temperature rating. Confirm lead-free status as indicated by the plus symbol. Ensure compatibility with the required 4.5V to 5.5V supply range and check for any obsolete status or limited availability from authorized distributors before finalizing procurement plans.

Selection Notes

Select this controller when converting volatile CMOS RAM to nonvolatile storage is required. It is suitable for systems needing automatic write protection during power failures and low-power battery backup. Consider the 16-pin Wide SO package for surface-mount applications requiring the specified industrial temperature range and dual-battery redundancy support.

Part Context

This component belongs to the MXD1210 series of nonvolatile RAM controllers. It is designed to interface directly with standard CMOS RAM chips, providing essential power management and data integrity features without requiring complex external circuitry. The series offers various package options and temperature grades to suit different system constraints.

Replacement Considerations

MXD1210CWE+

FAQ

How does the MXD1210EWE+ protect data during a power failure?

It detects when the power supply drops below a set threshold and immediately holds the chip-enable output low to prevent writes, while switching power to the RAM from a connected battery.

What is the purpose of the battery freshness seal feature?

It isolates the batteries from the system upon initial connection, preventing discharge until the main power supply is applied, thereby preserving battery shelf life during inventory storage.