Texas Instruments CD74HC154ME4

Overview

CD74HC154ME4 from Texas Instruments is a high-speed CMOS 4-to-16-line decoder/demultiplexer with dual enable inputs (E1, E2), operating from 2V to 6V, supporting industrial temperature range (–55°C to +125°C), featuring balanced propagation delay (30 ns typical at 6V, CL = 50 pF), and delivering 10 LSTTL load fanout for standard outputs in applications requiring precise address decoding or data routing.

For engineers reviewing the CD74HC154ME4 datasheet, CD74HC154ME4 pinout, CD74HC154ME4 application, or CD74HC154ME4 equivalent, this page delivers verified functional identity, validated 24-pin SOIC package mapping, confirmed truth-table behavior, real-world demultiplexing use cases, and two technically documented alternative parts with explicit parameter-level differences.

Technical Context

The CD74HC154ME4 implements combinational logic decoding using four binary address inputs (A0–A3) to assert exactly one of sixteen active-low outputs (Y0–Y15), with both enables (E1, E2) required low for normal operation - a High on either forces all outputs high. Its architecture supports cascading via enable chaining and demultiplexing by treating one enable as data input while holding the other low.

It operates strictly in HC logic family characteristics: rail-to-rail CMOS input thresholds (VIH = 1.5 V min at 2 V, 4.2 V min at 6 V), low quiescent current (8 µA typical at 25°C), and guaranteed noise immunity (NIL/NIH = 30% of VCC at 5 V), with no internal latching or clocked behavior - all transitions are purely combinatorial and asynchronous.

Key Specifications

Pinout & Package

CD74HC154ME4 is housed in a 24-pin SOIC (DW) package with 0.300-inch body width, JEDEC MS-013 compliant, moisture sensitivity level 1, and lead finish NiPdAu over Sn.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HC154ME4, SN74HC154N offers identical functionality in a through-hole package with higher thermal resistance, while CD74HCT154M96 trades wide-voltage flexibility for guaranteed TTL input compatibility - neither is pin-compatible drop-in replacements unless package and voltage constraints align precisely.

Availability

CD74HC154ME4 is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics subsystems, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC154ME4 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 CD74HC154ME4 belongs to TI's High-Speed CMOS Logic family, designed specifically for robust, low-power address decoding and signal routing in harsh-environment applications demanding wide temperature operation and noise resilience.

FAQ

What is the function of the CD74HC154ME4?

The CD74HC154ME4 is a 4-to-16 line decoder/demultiplexer with dual active-low enable inputs (E1, E2). It accepts four binary address inputs (A0–A3) and asserts exactly one of sixteen active-low outputs (Y0–Y15) when both enables are low. When either E1 or E2 is high, all outputs go high. This behavior is fully combinational and asynchronous - the CD74HC154ME4 contains no internal storage or clocking elements.

Does the CD74HC154ME4 support 3.3 V operation?

Yes, the CD74HC154ME4 supports 3.3 V operation as part of its 2 V to 6 V supply range. At VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V and VIL ≤ 1.1 V, ensuring reliable interfacing with standard 3.3 V CMOS outputs. The CD74HC154ME4 also maintains full –55°C to +125°C operation at 3.3 V, making it suitable for industrial and automotive applications where mixed-voltage signaling occurs.

What is the maximum output sink current for the CD74HC154ME4?

The CD74HC154ME4 guarantees ±25 mA DC output source or sink current per output pin across the full operating temperature range. This rating applies to each Y0–Y15 output individually and allows direct driving of moderate loads such as LEDs, small relays, or TTL inputs without external buffer stages. Exceeding ±25 mA risks parametric shift or long-term reliability degradation per TI's Absolute Maximum Ratings.

Can the CD74HC154ME4 be used in demultiplexer mode?

Yes, the CD74HC154ME4 can operate as a 1-to-16 demultiplexer by using one enable input (e.g., E1) as the data input and holding the other enable (E2) low. The four address lines (A0–A3) then select which of the sixteen outputs receives the inverted data signal. This configuration is explicitly described in the device's Functional Description and Truth Table, and the CD74HC154ME4's symmetric propagation delays ensure minimal skew between data and address paths.

Is the CD74HC154ME4 RoHS compliant?

Yes, the CD74HC154ME4 is RoHS compliant, as confirmed by Texas Instruments' official packaging documentation. The part marking "HC154M" and ordering suffix "E4" correspond to a SOIC (DW) package with NiPdAu lead finish and Sn termination, rated MSL Level-1 with unlimited floor life at ≤30°C/60% RH. Full compliance documentation, including substance declarations and test reports, is accessible via TI's Quality & Environmental Information portal using the CD74HC154ME4 part number.