SN54LS240J – TEXAS INSTRUMENTS

The SN54LS240J is a radiation-hardened octal buffer and line driver with 3-STATE outputs, fabricated using low-power Schottky TTL technology. This device features inverting logic, providing inverted data at the output compared to the input. The ‘LS240J’ designation indicates a ceramic dual-in-line package (CDIP) suitable for applications requiring high reliability and extended temperature ranges, typically -55°C to +125°C. The device incorporates two independent groups of four buffers, each controlled by a separate output enable (OE) input. A low logic level on the OE input enables the corresponding outputs, while a high logic level forces them into a high-impedance state, allowing multiple devices to share a common bus. Propagation delay times are typically in the 10-15 ns range, and it operates from a standard 5V DC supply.