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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