GENERAL DESCRIPTION:
The LS7222 is a programmable electronic lock implemented in a monolithic CMOS integrated circuit. The circuit contains all the necessary memory, decoder and control logic to make a programmable "keyless" lock system to control electro-mechanical locks. Input is provided by a
matrix keypad whose maximum allowable size is 4 x 4.

FEATURES:
• Stand alone lock logic
• 38416, 4-digit combinations
• 3 different user programmable codes
• Momentary and static lock control outputs
• Internal key debounce circuitry
• Tamper detection output
• Status outputs
• Low current consumption
• +4V to +15V operation (VDD -Vss)
• LS7222 (DIP), LS7222-S (SOIC)- See Figure 1