MC74LCX138MEL

The MC74LCX138MEL from ON Semiconductor is a low-voltage CMOS 3-to-8 decoder/demultiplexer designed for applications requiring efficient address decoding or data distribution.

This device operates with a supply voltage range of 2.3V to 3.6V, making it suitable for modern low-power systems. It features 5V tolerant inputs, allowing seamless interface capability with 5V TTL logic devices. The decoder accepts three binary weighted inputs (A0, A1, A2) and provides eight mutually exclusive active-LOW outputs (O0-O7). It includes three enable inputs (two active-LOW, E1, E2, and one active-HIGH, E3) for flexible control and parallel expansion.

With a balanced output sink and source capability of 24mA, the MC74LCX138MEL offers robust drive performance. It exhibits near-zero static supply current (10 μA), significantly reducing system power requirements. The device is designed for surface mounting and comes in a 16-SOEIAJ package, with an operating temperature range of -40°C to 85°C.

Key features include LVTTL and LVCMOS compatibility, latchup performance exceeding 500mA, and ESD protection exceeding 2000V (Human Body Model). This makes the MC74LCX138MEL a reliable choice for memory address decoding and other TTL level bus-oriented applications.