LS7216-S

Overview

The LS7216-S is a CMOS programmable digital delay timer manufactured by LSI Computer Systems. It generates digitally programmable delays ranging from microseconds to days, controlled by eight binary-weighted inputs (WB0-WB7) and an applied clock or oscillator frequency. The device supports four operating modes: One-Shot, Delayed Operate, Delayed Release, and Dual Delay. It features an on-chip oscillator capable of using RC or crystal components, or it can accept an external clock time base. The LS7216-S operates within a voltage range of +3V to +18V and includes a reset input for delay abort.

Feature Summary

• Programmable delay generation from microseconds to days via 8-bit binary weighted inputs
• Four selectable operating modes: One-Shot, Delayed Operate, Delayed Release, and Dual Delay
• Integrated on-chip oscillator supporting RC or crystal configurations, or external clock input
• Direct relay drive capability with low quiescent current consumption

Applications

• Industrial timing control systems requiring precise digital delay intervals
• Automated machinery sequencing and process control logic
• Safety interlock circuits with programmable response times
• Test equipment generating specific pulse widths or delay sequences

Part Context

The LS7216-S is the SOIC package variant of the LS7216 series, designed as a CMOS integrated circuit for generating digitally programmable delays. It is functionally related to the LS7215 but offers enhanced pinout or feature sets suitable for surface-mount applications. The component is part of the broader LS721x family of timers produced by LSI Computer Systems.

Replacement Considerations

The LS7215 serves as a functional counterpart within the same product family. Designers should verify pin compatibility and package differences when substituting between DIP and SOIC variants. Ensure that the replacement component supports the required voltage range and operating modes for the specific application.