LS7211 Description
The LS7211/LS7212 are monolithic 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.
LS7211 Key Features
- 8-bit programmable delay from nanoseconds to days
- 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 32.768KHz watch crystal
- Four operating modes
- Reset input for delay abort
- Low quiescent and operating current
- Direct relay drive
- +4V to +18V operation (VDD-VSS)
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