Texas Instruments CD74HCT153E

Overview

CD74HCT153E from Texas Instruments is a dual 4-to-1-line selector/multiplexer with common select inputs (S0, S1), independent enable inputs (1E, 2E), and TTL-compatible CMOS logic. It operates from 4.5 V to 5.5 V, delivers propagation delays as low as 24 ns (I to Y, CL = 50 pF), and supports industrial temperature range (–55 °C to +125 °C). It is used in digital signal routing, data path selection, and address decoding in embedded control systems.

For engineers reviewing the CD74HCT153E datasheet, CD74HCT153E pinout, CD74HCT153E application, or CD74HCT153E equivalent, key selection criteria include its HCT-level input compatibility (VIH ≥ 2 V, VIL ≤ 0.8 V), dual-section independent enable control, 16-pin PDIP package, and guaranteed operation across extended temperature extremes.

Technical Context

The CD74HCT153E implements two independent 4-input multiplexers sharing select lines S0 and S1, where each section outputs one of four data inputs (1I0–1I3 or 2I0–2I3) based on the binary value of S1:S0 when its respective enable (1E or 2E) is LOW. Outputs are actively driven and go LOW when enable is HIGH - a true active-low enable architecture.

Its HCT logic family ensures direct interface with legacy LSTTL devices without level shifting: input thresholds meet VIH ≥ 2.0 V (min) and VIL ≤ 0.8 V (max) at VCC = 4.5–5.5 V, while output drive meets VOH ≥ 3.7 V (min, TTL load) and VOL ≤ 0.4 V (max, 4 mA sink) over full temperature range.

Key Specifications

Pinout & Package

CD74HCT153E is housed in a 16-lead plastic dual in-line package (PDIP, N package), with 0.3-inch body width and through-hole mounting. Pin 1 is located at top-left corner (quadrant Q1) when notch faces upward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HCT153E, SN74HCT153N offers identical functionality with enhanced lifecycle support, while 74ACT153PC trades higher static current for significantly reduced delay - making it suitable only where speed outweighs power and noise constraints.

Availability

CD74HCT153E is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, aerospace avionics data routing, and automotive engine control unit applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HCT153E 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The CD74HCT153E belongs to TI's legacy High-Speed CMOS Logic (HCT) product line, designed specifically for seamless migration from bipolar TTL systems while retaining low power consumption and wide operating margins.

FAQ

What is the maximum clock/data frequency supported by CD74HCT153E?

The CD74HCT153E does not operate on a clock; it is a combinational logic device. Its usable data switching rate depends on propagation delay and system setup/hold timing. With a maximum I-to-Y propagation delay of 36 ns (–55 °C to +125 °C), CD74HCT153E reliably supports input signal changes up to approximately 10 MHz in well-designed synchronous systems where select lines are stable before data transitions.

Can CD74HCT153E interface directly with 3.3 V microcontrollers?

No - CD74HCT153E requires a 4.5 V to 5.5 V supply and is not 3.3 V tolerant. Its inputs are designed for LSTTL compatibility (VIH ≥ 2.0 V, VIL ≤ 0.8 V), but driving it from a 3.3 V GPIO may result in marginal or non-functional VIH levels. For 3.3 V systems, use CD74HC153E (2–6 V operation) or add level-shifting circuitry before the CD74HCT153E inputs.

Does CD74HCT153E have internal pull-up or pull-down resistors on its enable or select pins?

No - CD74HCT153E has no internal termination resistors. All inputs (1E, 2E, S0, S1, and data lines) are CMOS gates with high-impedance inputs. External pull-up or pull-down resistors must be used to ensure defined logic states during power-up, reset, or floating conditions - especially critical for enable pins to prevent unintended output activation.

Is CD74HCT153E suitable for use in safety-critical automotive applications?

CD74HCT153E itself is not AEC-Q100 qualified, but its –55 °C to +125 °C rating and proven reliability in military-grade variants (CD54HCT153) make it a candidate for under-hood or chassis applications when validated per ISO 26262 requirements. Customers must perform their own FMEDA and qualification testing; TI provides no ASIL-rated documentation for CD74HCT153E.

What is the thermal resistance (θJA) of the CD74HCT153E PDIP package?

The junction-to-ambient thermal resistance (θJA) for the CD74HCT153E in its 16-lead PDIP (N) package is 67 °C/W under typical JEDEC-standard PCB conditions (single-layer copper, 1 in² pad). This value assumes no added heatsinking and guides safe power dissipation limits - for example, at 160 µA ICC (max) and 5.5 V, total power is ~0.88 mW, resulting in negligible temperature rise.