LS7220 Overview
The LS7220 is a MOS digital lock circuit. When wired to a ten-digit keypad, the circuit will recognize one four-digit bination out of a possible 5040 binations. The LS7220 is configured with the.
LS7220 Key Features
- 5040 Four-Digit binations (for a 10 digit Keypad)
- binations are Hard-Wire Programmed
- Sense Input Enables Operation
- Save Memory Feature for Valet Parking
- Convenience Delay Controlled by External Capacitor
- Static or Momentary Lock Control Output
- Save Memory and Lock Status Outputs
- +5V to +18V Operation (Vss
- LS7220 (DIP), LS7220-S (SOIC)
- See Figure 1