54F38DMQB – NATIONAL SEMICONDUCTOR

The National Semiconductor 54F38DMQB is a high-performance, TTL-compatible, Quad 2-Input NAND Buffer featuring Schottky clamping diodes for improved switching speed. Its primary function is to provide non-inverting buffering with high output drive capability. The output voltage rating is 5V, enabling direct interfacing with other TTL and CMOS logic families. Each output can source up to 1mA and sink up to 20mA, making it suitable for driving multiple loads or moderate-current LEDs. This device is supplied in a hermetically sealed 14-pin CerDIP package, ensuring high reliability in harsh environments. The 54F38DMQB is specified for operation across the full military temperature range of –55°C to 125°C. Common applications include buffering address lines, clock signals, and data buses in military and aerospace systems where signal integrity and robust performance are critical. Its advantages lie in its high speed, high drive capability, and radiation tolerance, making it a preferred choice over standard TTL buffers in demanding applications.