DS1216C

Controllers Overview

The DS1216C 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 600-mil-wide DIP package. Designed for memory sizes from 2K x 8 to 512K x 8, it converts standard CMOS static RAMs into nonvolatile memory using a common energy source for timekeeping and data retention. The device operates within a voltage range of 4.5V to 5.5V and supports a commercial temperature range of 0°C to 70°C.

Controllers Feature Summary

• Integrates a CMOS watch function with automatic leap year compensation valid up to the year 2100.
• Converts standard CMOS static RAMs into nonvolatile memory solutions.
• Features an embedded lithium energy cell that maintains both watch information and RAM data.
• Includes an NV RAM controller circuit with electrically disconnected lithium source until first power application.

Controllers Applications

• Smartwatch RAM applications requiring integrated timekeeping and data storage.
• Systems converting standard CMOS SRAMs into nonvolatile memory.
• Embedded systems needing simultaneous date/time tracking and volatile memory retention.

Controllers Procurement Notes

Verify component obsolescence status prior to procurement as the DS1216C is listed as obsolete. Confirm RoHS compliance requirements against the specific manufacturing lot, as historical batches may not meet current environmental standards. Ensure replacement strategies account for the discontinuation of this specific part number in active supply chains.

Controllers Selection Notes

Select this component when a combined solution for nonvolatile memory and real-time clock functionality is required in a DIP form factor. Verify compatibility with the target CMOS SRAM density, which ranges from 2K x 8 to 512K x 8. Ensure the application environment falls within the specified commercial temperature range and voltage supply constraints.

Controllers Part Context

The DS1216C belongs to the DS1216 family of SmartWatch sockets produced by Maxim Integrated, now part of Analog Devices. This series provides integrated solutions for memory volatility issues by combining RAM control with timekeeping capabilities. The C suffix typically denotes the commercial temperature grade variant within the product line.

Controllers Replacement Considerations

M48Z35-70PC1 is identified as a similar substitute part number available from STMicroelectronics for legacy designs requiring equivalent functionality.