DS1216E

Overview

The DS1216E is a SmartWatch ROM socket manufactured by Analog Devices Inc./Maxim Integrated. It is designed as a 600-mil-wide DIP socket with an embedded CMOS watch function, NV RAM controller circuit, and lithium energy source. This component converts standard CMOS Static RAMs into nonvolatile memory for sizes ranging from 2K x 8 to 512K x 8. The package size ranges from 26 pins to 32 pins. It maintains time, date, and RAM data using a common energy source.

Feature Summary

• Converts standard CMOS static RAMs into nonvolatile memory solutions
• Includes built-in CMOS watch function for tracking time and date
• Features an embedded lithium energy source for data retention
• Provides automatic leap year compensation valid up to the year 2100

Applications

• Memory systems requiring nonvolatile storage capabilities
• Applications needing precise time and date tracking
• Systems utilizing CMOS SRAMs that require data retention during power loss

Procurement Notes

Verify the specific pin count and package width required for the target application, as the series supports various sizes from 2K x 8 to 512K x 8. Confirm compatibility with the intended CMOS SRAM chip before procurement. Check current availability status as these components may be discontinued or have limited stock. Ensure the lithium energy source freshness is maintained until first power application.

Selection Notes

Select this component when a combined solution for nonvolatile memory and real-time clock functionality is needed in a single socket. It is suitable for designs where space constraints favor a DIP form factor. Consider the memory size requirements (2K x 8 to 512K x 8) to ensure the correct pin configuration is chosen. Verify that the ±10% operating range meets the system voltage specifications.

Part Context

The DS1216E belongs to the DS1216 SmartWatch family, which includes both RAM (DS1216B/C/D/H) and ROM (DS1216E/F) variants. These sockets are part of a broader line of NV RAM controllers designed to simplify the integration of volatile memory with nonvolatile capabilities. The manufacturer, Analog Devices Inc./Maxim Integrated, provides these solutions for industrial and commercial applications requiring reliable data retention.

Replacement Considerations

The DS1216B, DS1216C, and DS1216D are listed as similar parts within the same SmartWatch RAM family. For direct functional equivalents in the ROM category, verify other DS1216F variants if available. Cross-reference pinouts and memory size support to ensure compatibility with existing PCB layouts.