DS1211S/T&R

Controllers Overview

The DS1211S/T&R is a nonvolatile memory controller designed to convert full CMOS RAMs into nonvolatile memories. It features an integrated 3-to-8 decoder providing control for up to eight CMOS RAM chips. The device monitors incoming power for out-of-tolerance conditions, automatically inhibiting chip enables to write protect data and switching to battery backup upon power failure. It supports redundant batteries and includes circuitry to test battery condition on power-up.

Controllers Feature Summary

• Converts full CMOS RAMs into nonvolatile memories
• Unconditionally write protects when VCC is out of tolerance
• Automatically switches to battery when power-fail occurs
• Tests battery condition on power-up

Controllers Applications

• Converting CMOS RAMs into nonvolatile memories
• Providing control for up to eight CMOS RAMs
• Power-fail signal interrupt for processor

Controllers Procurement Notes

Verify the specific suffix 'T&R' indicates tape-and-reel packaging against official documentation. Confirm the operating temperature range matches application requirements, as industrial variants (-40°C to +85°C) may differ from standard options. Ensure compatibility with the target CMOS RAM voltage levels before integration.

Controllers Selection Notes

Select this component when managing multiple CMOS RAM banks requiring unified nonvolatile control. The built-in 3-to-8 decoder simplifies addressing logic for up to eight chips. Consider the low battery current consumption and redundant battery support for long-term reliability in critical storage applications.

Controllers Part Context

The DS1211 series serves as a dedicated nonvolatile controller within the Analog Devices/Maxim Integrated portfolio. It addresses the common engineering challenge of maintaining data integrity in volatile memory systems during power interruptions by integrating monitoring, decoding, and switching functions into a single CMOS circuit.

Controllers Replacement Considerations

Consult the datasheet for the DS1212 Nonvolatile Controller x 16 Chip for related electrical specifications and operational comparisons.