Texas Instruments CD74HCT153EG4

Overview

CD74HCT153EG4 from Texas Instruments is a dual 4-to-1-line selector/multiplexer IC designed for digital signal routing in logic systems. It features common select inputs (S0, S1), independent enable inputs (1E, 2E), TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), operates from 4.5 V to 5.5 V, and supports industrial temperature range (–55 °C to +125 °C). It is used in data path selection within microcontroller peripheral interfaces and test equipment control logic.

For engineers reviewing the CD74HCT153EG4 datasheet, CD74HCT153EG4 pinout, CD74HCT153EG4 application, or CD74HCT153EG4 equivalent, key selection criteria include its HCT-family LSTTL-input compatibility, dual independent multiplexer sections with shared select lines, guaranteed propagation delay ≤ 51 ns (CL = 50 pF), and PDIP-16 package suitability for through-hole prototyping and legacy industrial PCBs.

Technical Context

The CD74HCT153EG4 implements two independent 4:1 multiplexers sharing S0 and S1 select lines, where each section routes one of four data inputs (I0–I3) to its output (Y) when its respective enable (E) is low. Enable is active-low; outputs are forced low when E is high.

Its HCT logic family ensures direct interface with standard TTL outputs while maintaining CMOS power efficiency. Input leakage remains ≤ ±1 µA across temperature, and output drive capability supports 10 LSTTL loads under full temperature range, enabling robust fanout in mixed-logic systems.

Key Specifications

Pinout & Package

CD74HCT153EG4 is supplied in a 16-pin plastic dual in-line package (PDIP), with 0.3-inch body width and through-hole mounting. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-to-1 multiplexer applications.

Compared with CD74HCT153EG4, SN74HCT153N offers identical performance with updated TI manufacturing traceability, while MC74HCT153NG provides validated second-source assurance with sub-5 ns timing variance - both preserve pinout, truth table, and thermal design margin without layout changes.

Availability

CD74HCT153EG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, military avionics signal routing, and automated test equipment channel selection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HCT153EG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and logic solutions with over 90 years of innovation in high-reliability components.

The CD74HCT153EG4 belongs to TI's legacy High-Speed CMOS Logic (HCT) product line, engineered for seamless integration with TTL-based systems while delivering CMOS-level power efficiency and wide-temperature resilience.

FAQ

What is the operating voltage range for CD74HCT153EG4?

The CD74HCT153EG4 operates from 4.5 V to 5.5 V DC. This narrow range ensures strict compatibility with standard 5 V TTL logic families while maintaining noise immunity and stable propagation delay. Operation outside this window may cause undefined output states or increased ICC. The CD74HCT153EG4 does not support 3.3 V or 2 V operation - those require HC-series variants like CD74HC153E.

Does CD74HCT153EG4 support independent enable control for each multiplexer section?

Yes, CD74HCT153EG4 provides two separate active-low enable inputs: 1E controls the first 4:1 multiplexer section (1I0–1I3 → 1Y), and 2E controls the second (2I0–2I3 → 2Y). This allows asynchronous gating of either section without affecting the other, enabling flexible data path isolation in real-time systems. Both enables default to disabled (high) state upon power-up.

What is the maximum propagation delay of CD74HCT153EG4 over its full temperature range?

The maximum propagation delay for CD74HCT153EG4 is 51 ns, specified for S→Y, I→Y, and E→Y paths at VCC = 4.5 V, CL = 50 pF, and temperature extremes from –55 °C to +125 °C. This value is guaranteed in the datasheet's "–55 °C to +125 °C" column under switching specifications and reflects worst-case timing for timing-critical routing decisions.

Can CD74HCT153EG4 be used as a direct replacement for 74LS153 in existing designs?

Yes, CD74HCT153EG4 is a functionally and pin-compatible replacement for 74LS153. Its LSTTL-input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), identical truth table, and PDIP-16 footprint allow drop-in substitution. Additionally, CD74HCT153EG4 draws significantly less quiescent current (≤160 µA vs ~20 mA for LS), reducing thermal load and improving system efficiency without modifying PCB layout.

What package type is used for CD74HCT153EG4?

CD74HCT153EG4 uses a 16-pin plastic dual in-line package (PDIP) with 0.3-inch body width and through-hole leads. This package is designated "N" in TI's packaging nomenclature and is compatible with standard 0.1-inch grid protoboards and wave-soldered industrial assemblies. The "G4" suffix indicates RoHS-compliant lead finish (NIPDAU) and tube packaging.