Texas Instruments CD74HCT154M96G4

Overview

CD74HCT154M96G4 from Texas Instruments is a 4-to-16-line decoder/demultiplexer with dual enable inputs (E1, E2), operating at 4.5V–5.5V, delivering 35ns typical propagation delay (CL = 50pF, TA = 25°C), 10 LSTTL load fanout, and full -55°C to +125°C industrial/military temperature range. It performs address decoding in memory expansion systems and enables channel selection in data routing applications.

For engineers reviewing the CD74HCT154M96G4 datasheet, CD74HCT154M96G4 pinout, CD74HCT154M96G4 application, or CD74HCT154M96G4 equivalent, this page delivers verified functional identity, SOIC-24 package mapping, truth-table–driven output behavior, LSTTL-compatible input thresholds, and validated alternatives for high-reliability decoding tasks.

Technical Context

The CD74HCT154M96G4 implements active-low 4-bit binary decoding with two independent enable inputs: a High on either E1 or E2 forces all 16 outputs (Y0–Y15) High; only when both enables are Low does the A0–A3 address bus select one active-Low output. Its HCT logic family ensures direct compatibility with LSTTL voltage levels (VIL ≤ 0.8V, VIH ≥ 2.0V) while maintaining CMOS power efficiency.

Propagation delay is tightly specified across temperature: 35–53ns (E1/E2 or address-to-output, CL = 50pF, VCC = 4.5V), and output transition time remains under 22ns. Input capacitance is fixed at 10pF, and quiescent ICC is ≤160µA over full temperature range - enabling stable operation in thermally demanding embedded control and avionics subsystems.

Key Specifications

Pinout & Package

CD74HCT154M96G4 is housed in a 24-pin SOIC (DW) package with 0.300-inch body width, gull-wing leads, and pin 1 quadrant Q1 orientation per JEDEC MS-012. Thermal resistance θJA is 46°C/W, supporting continuous operation at full temperature range with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-to-16 decoder/demultiplexer applications.

Compared with SN74HCT154DR and CD74HC154M96G4, the CD74HCT154M96G4 uniquely combines guaranteed -55°C to +125°C operation, native LSTTL input compatibility, and SOIC-24 tape-and-reel packaging - making it the only choice for high-reliability, drop-in replacement in legacy military and industrial control systems.

Availability

CD74HCT154M96G4 is available at Aetrix Electronics and suitable for memory expansion, industrial I/O multiplexing, avionics bus interface, and automated test equipment requiring stable component supply across extreme temperature conditions and long production lifecycles.

Supply support for CD74HCT154M96G4 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 high-reliability logic solutions, with decades of heritage in military-grade IC development.

The CD74HCT154M96G4 belongs to TI's CD74HCT high-speed CMOS logic family, engineered specifically for seamless integration into legacy 5V TTL-based systems requiring extended temperature operation and zero-level-shift design simplicity.

FAQ

What is the maximum clock/data rate supported by CD74HCT154M96G4?

The CD74HCT154M96G4 is a combinational logic device without an internal clock; its effective switching rate depends on propagation delay and system setup/hold timing. With a worst-case propagation delay of 53ns (–55°C to +125°C, VCC = 4.5V), it supports address strobe frequencies up to ~10 MHz in well-designed PCB layouts with controlled trace impedance and proper decoupling. The CD74HCT154M96G4 datasheet specifies no minimum pulse width, but practical use requires ≥100ns input pulses for reliable operation across temperature.

Does CD74HCT154M96G4 require external pull-up or pull-down resistors on its inputs or outputs?

No. The CD74HCT154M96G4 has CMOS input structure with II ≤ ±1µA and TTL-compatible input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), eliminating need for external biasing on A0–A3, E1, or E2. Outputs are active-low, push-pull, and capable of sinking 25mA - they drive LSTTL loads directly without pull-ups. External resistors are only required if interfacing with open-collector systems or implementing wired-OR logic, which is not standard for CD74HCT154M96G4 applications.

Can CD74HCT154M96G4 be used as a 1-to-16 demultiplexer?

Yes. When one enable input (e.g., E1) is used as the data input and the other (E2) held Low, the CD74HCT154M96G4 functions as a 1-to-16 demultiplexer: the A0–A3 address lines select which of Y0–Y15 receives the inverted E1 signal. This configuration is explicitly described in the CD74HCT154M96G4 datasheet truth table and functional diagram, and requires no additional components - confirming full demux capability inherent to the CD74HCT154M96G4 architecture.

Is CD74HCT154M96G4 pin-compatible with older 74LS154 or 74ALS154 devices?

Yes - the CD74HCT154M96G4 uses identical 24-pin SOIC (DW) footprint and pinout as the 74LS154 and 74ALS154, including VCC (pin 24), GND (pin 12), A0–A3, E1/E2, and Y0–Y15 assignments. However, output drive strength differs: LS/ALS sources/sinks ~8mA, while CD74HCT154M96G4 sinks 25mA. This allows direct PCB replacement in most cases, though designers must verify that downstream loads do not exceed CD74HCT154M96G4's 25mA per output rating.

What is the meaning of the "G4" suffix in CD74HCT154M96G4?

The "G4" suffix in CD74HCT154M96G4 indicates TI's green, lead-free, RoHS-compliant finish: NiPdAu (nickel-palladium-gold) termination with matte tin over nickel-palladium underplate, qualified to JEDEC J-STD-020 moisture sensitivity Level-1 (unlimited floor life at ≤30°C/60% RH). It confirms full compliance with environmental regulations and reflow profile compatibility for lead-free assembly - a mandatory specification for CD74HCT154M96G4 in modern industrial and aerospace manufacturing.