CD74HC238E .

The CD74HC238E is a 3-to-8 high speed CMOS Decoder/Demultiplexer well suited to memory address decoding or data routing applications. Both circuits feature low power consumption usually associated with CMOS circuitry, yet have speeds comparable to low power Schottky TTL logic. Both circuits have three binary select inputs (A0, A1 and A2). If the device is enabled, these inputs determine which of the normally low outputs of the HC238 series will go high. Two active low and one active high enables (E1\, E2\ and E3) are provided to ease the cascading of decoders. The decoder's 8 outputs can drive 10 low power Schottky TTL equivalent loads.

• I/O Port or memory selector
• Three enable inputs to simplify cascading
• Balanced propagation delay and transition times
• Significant power reduction compared to LSTTL logic ICs
• High noise immunity
• Direct LSTTL input logic compatibility
• CMOS Input compatibility