Lot of 20 LSI LS7223 Keypad Programmable Digital Lock IC DIP-20 Vintage NOS
$ 42.24
Description
Lot of 20 LSI LS7223 Keypad Programmable Digital Lock IC DIP-20 Vintage NOS. Part Number: LS7223 (also replaces / similar to LS7223-S variant layouts). Manufacturer: LSI Computer Systems. Product Type: Keypad Programmable Digital Lock Integrated Circuit (IC). Massive Combination Matrix: Supports up to 38,416 distinct 4-digit combinations using a standard 4x4 keypad matrix. ## Item Description **Manufacturer:** LSI Computer Systems **Part Number:** LS7223 (also replaces / similar to LS7223-S variant layouts) **Product Type:** Keypad Programmable Digital Lock Integrated Circuit (IC) **Package Type:** DIP-20 (Dual In-Line Package, 20-Pin Through-Hole) **Total Quantity:** 1 Unit = 100% Complete Lot of 20 Chips ### Product Condition: These are original, unused vintage electronic components in pristine physical condition with clean, straight pins. Perfect for servicing legacy security equipment or building unique keyless standalone locking logic projects. ### Key Features & Technical Specifications: * **Standalone Digital Lock Logic:** Full monolithic CMOS implementation containing internal memory, decoder, and essential control logic. * **Massive Combination Matrix:** Supports up to 38,416 distinct 4-digit combinations using a standard 4x4 keypad matrix. * **Multi-Code Flexibility:** Features 3 separate user-programmable codes (Lock 1, Lock 2, and Duress/Tamper). * **Advanced Integrations:** Built-in internal key debounce circuit, tamper detection outputs, and status outputs. * **Wide Voltage Range:** Operates efficiently on standard +4V to +15V DC power supplies with very low current consumption. ### Shipping & Handling: * Professional Handling: Safely packed and shipped inside dedicated anti-static storage packaging to eliminate any ESD (Electrostatic Discharge) or pin damage during transit. * Prompt Dispatch: Ships from a reliable domestic seller within [Insert Your Handling Time, e.g., 1-2 business days] of cleared payment. Please reach out if you have any technical questions or require a specific photo of the date code markings prior to placing your order!
