Description

The LS7215 and LS7216 are CMOS integrated circuits 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 programmed time delay manifests itself in the Delay Output (OUT) as a function of the Operating Mode selected by the Mode Select inputs A and B: One-Shot, Delayed Operate, Delayed Release or Dual Delay. The time delay is initiated by a transition at the Trigger Input (TRIG).

Features:

• The LS7215 and LS7216 are extended feature versions of the LS7211N and LS7212, respectively
• Extended features include:1. Latches for loading weighting bits from an 8-bit bus2. Open drain output for direct drive of a relay coil returned to chip VDD or to a voltage as high as 110V using a single external transistor