LS7223 Datasheet PDF - LSI Corporation

GENERAL DESCRIPTION:
The LS7223 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  electromechanical 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 circuit
• Tamper detection output
• Status outputs
• Low current consumption
• +4V to +15V operation (VDD-VSS)
• LS7223 (DIP), LS7223-S (SOIC) - See Figure 1