NXP 74HCT138PW 3-to-8 Line Decoder/Demultiplexer

The NXP 74HCT138PW is a high-speed Si-gate CMOS device that is pin-compatible with Low-power Schottky TTL (LSTTL). It is designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable times of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

The 74HCT138PW device features three binary select inputs (A, B, and C) which determine which one of the eight output lines (Y0 to Y7) will go low. When the enable inputs (E1 and E2) are active (low) and the inhibit input (E3) is inactive (high), one of the eight outputs will be low, with the other seven outputs high.

Key features of the 74HCT138PW include:

• Wide operating voltage range from 4.5V to 5.5V
• High noise immunity
• Low power consumption: Typical I_CC of 4 µA
• High noise immunity equivalent to that of the HEF4000B
• Non-inverting outputs
• Demultiplexing capability
• Multiple package options: TSSOP16, DHVQFN16

This decoder is designed for use in high-performance memory-decoding or data-routing applications that require very short propagation delay times. Its multiple package options, including the thin shrink small outline package (TSSOP16) and the dual in-line compatible package (DHVQFN16), provide flexibility for various applications and space-saving considerations on printed circuit boards.

Overall, the NXP 74HCT138PW is a versatile and reliable component that offers the functionality needed for complex digital systems. Its integration into your design will ensure efficient decoding and demultiplexing with minimal power consumption and delay.