DS1216D

Overview

The DS1216D is a SmartWatch RAM socket manufactured by Analog Devices Inc./Maxim Integrated. It integrates a CMOS watch function, an NV RAM controller circuit, and an embedded lithium energy source within a 32-pin DIP package. The device converts standard CMOS static RAMs ranging from 2K x 8 to 512K x 8 into nonvolatile memory solutions. It maintains timekeeping data and retains RAM information using the internal battery. The component operates within a voltage range of 4.5V to 5.5V and supports a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrates a built-in CMOS watch function for tracking time and date alongside NV RAM control
• Converts standard CMOS SRAMs into nonvolatile memory with an embedded lithium energy source
• Features automatic leap year compensation valid up to the year 2100
• Maintains watch information and RAM data retention during power loss

Applications

• Memory systems requiring nonvolatile storage without external batteries
• Applications needing precise time and date tracking integrated with memory
• Embedded systems utilizing standard CMOS SRAMs for persistent data retention

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to discontinued status. Confirm package integrity and pin compatibility with target SRAM sockets. Check for RoHS compliance limitations as indicated in product documentation. Ensure supply chain sources provide valid traceability records for critical applications.

Selection Notes

Select this component when integrating standard CMOS SRAMs into nonvolatile configurations. Verify that the required memory size falls within the supported 2K x 8 to 512K x 8 range. Ensure the application environment operates within the specified 0°C to +70°C temperature limits. Confirm that the 32-pin DIP form factor matches the system board layout requirements.

Part Context

The DS1216D belongs to the DS1216 series of SmartWatch RAM and ROM sockets. This family provides complete nonvolatile memory solutions by combining memory controllers with real-time clock capabilities. The series addresses volatility issues in standard SRAMs by incorporating internal power sources and timekeeping functions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.