Texas Instruments CD74HCT153MT

Overview

CD74HCT153MT from Texas Instruments is a dual 4-to-1-line selector/multiplexer IC designed for digital signal routing in industrial control, test equipment, and data acquisition systems. It features common S0/S1 select inputs, independent 1E/2E enable terminals, TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), 4.5–5.5 V operation, and operates across –55°C to +125°C.

For engineers reviewing the CD74HCT153MT datasheet, CD74HCT153MT pinout, CD74HCT153MT application, or CD74HCT153MT equivalent, this device serves as a temperature-hardened, logic-level-matched multiplexer for high-reliability 5 V digital systems requiring deterministic channel selection with low static current and balanced propagation delays.

Technical Context

The CD74HCT153MT implements two independent 4:1 multiplexers sharing S0 and S1 select lines, with separate active-low enables (1E, 2E) that force outputs LOW when asserted. Each section routes one of four data inputs (I0–I3) to its output (1Y or 2Y) based on binary S1S0 state.

Its HCT logic family ensures direct compatibility with LSTTL outputs while maintaining CMOS power efficiency: quiescent ICC ≤ 160 µA over full temperature range, input leakage ≤ ±1 µA, and fanout of 10 LSTTL loads at VCC = 5 V. Propagation delays are tightly balanced-tPLH/tPHL ≤ 51 ns (S→Y) and ≤ 36 ns (I→Y) at CL = 50 pF, 5 V.

Key Specifications

Pinout & Package

CD74HCT153MT is housed in a 16-pin SOIC (D) package with standard 1.27 mm pitch, JEDEC MS-012AC outline, and moisture sensitivity level 1 (260°C reflow compatible).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HCT153MT, SN74HCT153DR offers modern process consistency and full lifecycle support, while MC74HCT153ADR2G provides cross-manufacturer redundancy at slight trade-offs in long-term obsolescence risk and screening depth.

Availability

CD74HCT153MT is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive sensor multiplexing, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HCT153MT 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 leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in high-reliability components.

The CD74HCT153MT belongs to TI's legacy High-Speed CMOS Logic (HCT) product line, engineered for robust 5 V digital interfacing in aerospace, defense, and industrial systems demanding wide temperature operation and LSTTL compatibility.

FAQ

What is the maximum clock frequency supported by CD74HCT153MT for reliable multiplexing?

The CD74HCT153MT does not operate on a clock signal - it is a combinational logic device. Its usable data rate depends on propagation delay and system timing margins. With tPLH/tPHL ≤ 51 ns (S→Y) and ≤ 36 ns (I→Y) at 5 V and full temperature range, it supports reliable channel selection in digital systems with minimum pulse widths ≥ 100 ns, enabling effective use in 5–10 MHz multiplexed data paths when paired with appropriate setup/hold timing.

Can CD74HCT153MT be used with a 3.3 V microcontroller interface?

No - CD74HCT153MT requires 4.5–5.5 V supply and has TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). While a 3.3 V MCU output may meet VIH min under ideal conditions, it violates the 2.0 V minimum spec at worst-case VCC = 4.5 V and temperature extremes. Use level-shifting circuitry or select a 3.3 V–tolerant alternative like SN74LVC153A for direct interfacing.

Is CD74HCT153MT pin-compatible with CD74HC153MT?

Yes - CD74HCT153MT and CD74HC153MT share identical SOIC-16 pinout, terminal functions, and package dimensions. However, they differ electrically: CD74HC153MT operates from 2–6 V with CMOS input thresholds, while CD74HCT153MT is restricted to 4.5–5.5 V with TTL-compatible inputs. Interchange requires verifying supply voltage and upstream logic family compatibility.

What is the meaning of the "T" suffix in CD74HCT153MT?

The "T" suffix in CD74HCT153MT denotes a small-quantity tape-and-reel packaging option containing 250 units per reel, intended for prototyping, evaluation, and low-volume production. This contrasts with the "M96" suffix, which indicates standard large reels of 2500 units. Both use the same SOIC-16 package and electrical specifications.

Does CD74HCT153MT support hot-swap or live-insertion?

No - CD74HCT153MT is not designed for hot-swap operation. Its absolute maximum ratings specify that VCC must be applied before any input signal, and simultaneous application of inputs and supply can cause latch-up or permanent damage. Always sequence power (VCC first, then inputs) and observe proper ESD handling per the datasheet caution notice.