DS1211S+

Controllers Overview

The DS1211S+ is a nonvolatile RAM controller designed to convert full CMOS RAMs into nonvolatile memories. It operates with a supply voltage range of 4.75V to 5.5V and consumes less than 100 nA of battery current. The device features an integrated 3-to-8 decoder that provides control for up to eight CMOS RAM chips. It includes automatic switching to battery power upon power-fail detection and unconditionally write protects data when VCC is out of tolerance.

Controllers Feature Summary

• Converts full CMOS RAMs into nonvolatile memories by monitoring incoming power for out-of-tolerance conditions
• Integrates a 3-to-8 decoder providing control for up to eight CMOS RAMs
• Automatically switches to battery power during power-fail events while inhibiting chip enables for write protection

Controllers Applications

• Converting standard CMOS RAMs into nonvolatile memory systems
• Battery-backed memory modules requiring low standby current
• Systems requiring unconditional write protection during power failures

Controllers Procurement Notes

Verify component authenticity through authorized channels as the product status is obsolete. Confirm RoHS compliance details and check for specific manufacturing lot variations. Ensure compatibility with existing PCB footprints for the 20-SOIC package before procurement planning.

Controllers Selection Notes

Select this controller when designing systems using multiple CMOS RAM chips that require nonvolatile retention. It is suitable for applications needing precise voltage detection at extremely low battery consumption levels. Consider the industrial temperature range option if operation outside commercial limits is required.

Controllers Part Context

The DS1211 series belongs to Analog Devices' (formerly Maxim Integrated) line of nonvolatile controllers. This specific part number denotes the SOIC surface-mount variant of the DS1211 Nonvolatile Controller x 8 Chip, which manages power transitions and memory access for up to eight RAM devices.

Controllers Replacement Considerations

DS1211SN+