MXD1210CWE+

Overview

The MXD1210CWE+ is a nonvolatile RAM controller manufactured by Analog Devices Inc. (formerly Maxim Integrated). It converts standard volatile CMOS RAM into nonvolatile memory and monitors the power supply to provide write protection during marginal voltage conditions. The device operates within a supply voltage range of 4.5V to 5.5V, with a quiescent current of 230µA in normal mode and 2nA in battery backup mode. It features a 16-pin Wide SOIC package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Battery backup capability with low forward-voltage drop on the VCC supply switch
• Memory write protection that activates when power supply voltage falls out of tolerance
• Battery freshness seal feature to preserve battery shelf life during storage
• Optional redundant battery support for enhanced reliability

Applications

• Microprocessor systems
• Computers
• Embedded Systems

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C) and 'WE+' denotes the 16-pin Wide SOIC lead-free package. Confirm compatibility with the target system's voltage levels and interface requirements before integration. Check for updated datasheets from Analog Devices as Maxim Integrated products are now managed under ADI.

Selection Notes

Select this component for applications requiring reliable data retention in volatile RAM without complex nonvolatile memory interfaces. Consider the 230µA operating current and 2nA backup current for power-sensitive designs. Ensure the system design accommodates the required external capacitors and battery connections for the redundancy and freshness-seal functions.

Part Context

The MXD1210 series includes variants like MXD1210CPA (8-Pin PDIP), MXD1210CSA (8-SO), and MXD1210EWE (Extended Temperature). The MXD1210CWE+ specifically refers to the commercial grade version in a 16-pin Wide SOIC package. This part is part of the broader NVRAM controller family designed to simplify nonvolatile memory implementation in embedded systems.

Replacement Considerations

MXD1210CWE

FAQ

How does the MXD1210CWE+ protect data during a power failure?

It continuously monitors the power supply and switches to battery-backup mode when voltage drops below the threshold. It also holds the chip-enable output high to prevent writes during the transition.

What is the purpose of the Battery Freshness Seal?

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