SN74LS640N. Component family: TTL logic integrated circuit. Configuration: PCB through-hole mounting. Housing (JEDEC standard): -. Housing: DIP20. Logic circuits family: 74LSxx series. Logic function: 8-bit bus driver. 3-state output. Max temperature: +70°C.. Number of circuits: 1. Number of terminals: 20. RoHS: yes. Type of circuits: TTL. [V]: +5.25V. Original product from manufacturer: Texas Instruments. Quantity in stock updated on 11/13/2025, 15:28