CD54HCT138F3A

The CD54HCT138F3A from Texas Instruments is a high-speed silicon-gate CMOS decoder/demultiplexer. It is well-suited for memory address decoding or data-routing applications, offering low power consumption typical of CMOS circuitry with speeds comparable to low-power Schottky TTL logic.

This device features three binary select inputs (A0, A1, and A2) that determine which of the eight normally high outputs go low when enabled. It includes two active low and one active high enable inputs (E1, E2, and E3) for simplified cascading of decoders. The decoder's eight outputs can drive up to ten low-power Schottky TTL equivalent loads.

Key electrical characteristics include a typical propagation delay of 13 ns at 5V supply and 15 pF load capacitance. The device operates over a wide temperature range of -55°C to 125°C. For HC types, it supports 2V to 6V operation with high noise immunity. For HCT types, it offers 4.5V to 5.5V operation with direct LSTTL input logic compatibility and CMOS input compatibility.

The CD54HCT138F3A is available in a 16-lead CERDIP package, designed for through-hole mounting. Its robust design and specifications make it suitable for various digital logic applications requiring efficient decoding and data routing.