MC74LCX138DTR2

The MC74LCX138DTR2 from ON Semiconductor is a versatile 3-to-8 decoder/demultiplexer designed for low-voltage applications. It operates with a supply voltage ranging from 2.3V to 3.6V, making it suitable for modern electronic systems.

This device features high-impedance TTL-compatible inputs that reduce current loading on input drivers. The outputs are TTL-compatible and offer improved switching noise performance. A key feature is its 5V tolerant inputs, allowing seamless interface capability with 5V TTL logic devices. The MC74LCX138DTR2 accepts three binary weighted inputs (A0, A1, A2) and provides eight mutually exclusive active-low outputs (O0-O7). It also includes three enable inputs (two active-low, one active-high) for flexible control and parallel expansion.

With a balanced output sink and source capability of 24mA, this decoder/demultiplexer is suitable for various bus-oriented applications, including memory address decoding. It boasts near-zero static supply current (10 nA typical), significantly reducing system power requirements. Latchup performance exceeds 500mA, and ESD protection is robust, with Human Body Model exceeding 2000V and Machine Model exceeding 200V.

The MC74LCX138DTR2 is supplied in a 16-TSSOP surface mount package, measuring 0.173 inches (4.40mm) in width. It operates within an ambient temperature range of -40°C to 85°C.