MXD1210EPA+

Overview

The MXD1210EPA+ is a nonvolatile RAM controller manufactured by Analog Devices Inc. (formerly Maxim Integrated). It converts standard volatile CMOS RAM into nonvolatile memory using battery backup. The device operates within a supply voltage range of 4.5V to 5.5V and features a quiescent current of 230µA in operating mode and 2nA in battery-backup mode. It supports an optional redundant battery configuration and includes a battery freshness seal feature. The component is housed in an 8-pin PDIP package and is rated for an industrial temperature range of -40°C to +85°C.

Feature Summary

• Converts standard volatile CMOS RAM into nonvolatile memory via battery backup
• Continuously monitors power supply to provide write protection during marginal conditions
• Supports optional redundant battery selection with automatic switching between sources
• Includes battery freshness seal mode to preserve shelf life during storage

Applications

• Microprocessor systems requiring data retention
• Computer memory subsystems
• Embedded systems needing reliable nonvolatile storage

Procurement Notes

Verify the specific suffix 'E' confirms the -40°C to +85°C industrial temperature rating. Confirm the '+' suffix indicates lead-free packaging compliance. Ensure the PDIP-8 through-hole package matches the target PCB footprint. Check for availability constraints as this component may have limited stock or be subject to allocation.

Selection Notes

Select this controller when converting volatile SRAM to nonvolatile storage is required without external microcontroller intervention. The MXD1210EPA+ is suitable for applications demanding low standby current and robust power-fail detection. Consider the 8-pin PDIP package for through-hole assembly requirements. Evaluate the need for redundant battery support if extended uptime is critical.

Part Context

The MXD1210 series belongs to the family of nonvolatile RAM controllers designed by Maxim Integrated, now part of Analog Devices. These devices simplify system design by handling power management and write protection logic externally to the main processor. The E-suffix variant specifically targets industrial environments requiring wider thermal tolerance compared to commercial grade parts.

Replacement Considerations

MXD1210CPA+

FAQ

How does the MXD1210EPA+ protect data during a power failure?

It detects when the power supply drops below a threshold and immediately switches to battery backup while holding the chip-enable output high to prevent writes.

What is the function of the TOL pin?

The TOL pin allows selection between two power-fail detection thresholds: 4.75V/4.50V when grounded, or 4.50V/4.25V when connected to VCCO.