DESCRIPTION

· The LS7215 and LS7216 are CMOS integrated circuits designed for generating digitally programmable delays.
· The delay is controlled by 8 binary weighted inputs (WB0 - WB7) in conjunction with an applied clock or oscillator frequency.
· The delay is initiated by a transition at the Trigger Input (TRIG) and manifests in the Delay Output (OUT) based on the selected Operating Mode (One-Shot, Delayed Operate, Delayed Release, or Dual Delay).

FEATURES

· Programmable delay ranging from microseconds to days.
· 8 binary-weighted delay inputs that can be latched from a shared 8-bit bus.
· On-chip oscillator (RC or Crystal) or external clock time base.
· Selectable prescaler for real-time delay generation based on 50Hz/60Hz time base or 32,768Hz watch crystal.
· Four operating modes: One-Shot, Delayed Operate, Delayed Release, and Dual Delay.
· Reset input for delay abort.
· Low quiescent and operating current.
· Direct relay drive capability.
· Operates from +3V to +18V (VDD - VSS).
· Available in DIP (LS7215, LS7216) and SOIC (LS7215-S, LS7216-S) packages.

APPLICATIONS

· Timing and delay control in industrial automation.
· Precision timing in consumer electronics.
· Delay generation in communication systems.
· Real-time clock synchronization.
· Relay and switch control in power systems.