Nexperia USA Inc. 74HC154DB,112

Overview

74HC154DB,112 from Nexperia is a 4-to-16 line decoder/demultiplexer in SO24 package, decoding binary address inputs A0–A3 into 16 active-LOW outputs (Y0–Y15), with dual active-LOW enable inputs (E0, E1) and CMOS-level input compatibility. It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers 10 ns propagation delay at VCC = 6.0 V - used in memory address selection and I/O port expansion for microcontroller-based industrial control systems.

For engineers reviewing the 74HC154DB,112 datasheet, 74HC154DB,112 pinout, 74HC154DB,112 application, or 74HC154DB,112 equivalent, this device serves as a high-noise-immunity, low-power logic decoder for precise 1-of-16 output selection in embedded digital systems requiring deterministic timing and rail-to-rail voltage operation.

Technical Context

The 74HC154DB,112 implements a combinational logic decoder with two independent active-LOW enables: both E0 and E1 must be LOW for any output to respond to address inputs; if either is HIGH, all outputs are forced HIGH. Its internal architecture uses standard CMOS NAND/NOR gates to generate mutually exclusive active-LOW outputs based on 4-bit binary input.

It functions equivalently as a 1-to-16 demultiplexer when one enable (e.g., E1) is held LOW and the other (E0) accepts data - the selected Yn output mirrors E0's logic level. Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

Key Specifications

Pinout & Package

74HC154DB,112 is supplied in SO24 plastic small outline package (SOT137-1), 24-pin, 7.5 mm body width, with standard gull-wing lead form suitable for reflow soldering and automated PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT154DB,112, the 74HC154DB,112 offers superior noise margin in 3.3 V systems but requires level translation for pure TTL interfaces; versus SN74HC154N, it provides surface-mount reliability and thermal performance essential for production-grade industrial PCBs.

Availability

74HC154DB,112 is available at Aetrix Electronics and suitable for memory address decoding, I/O expansion, LED matrix control, and industrial bus arbitration requiring stable component supply across automotive, industrial automation, and embedded computing programs.

Supply support for 74HC154DB,112 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in mass-market electronics.

The 74HC154DB,112 belongs to Nexperia's HC-series high-speed CMOS logic family, designed specifically for low-power, noise-immune digital interfacing in space-constrained and thermally demanding embedded applications.

FAQ

What is the maximum clock frequency supported by the 74HC154DB,112?

The 74HC154DB,112 is a combinational logic device with no internal clock; its effective operating frequency depends on propagation delay and system timing margins. With 10 ns An→Yn delay at VCC = 6.0 V, it supports address decode cycles up to ~50 MHz in tightly constrained synchronous buses, assuming setup/hold times are met by the driving controller.

Can the 74HC154DB,112 drive LEDs directly?

Yes - each active-LOW output can sink up to 25 mA (per absolute maximum rating), sufficient to drive standard 20 mA LEDs with appropriate series resistors. At VCC = 5 V and IO = 4 mA, VOL remains ≤0.26 V, ensuring >4.7 V forward drop across typical red/green LEDs.

How do the enable inputs E0 and E1 interact logically?

E0 and E1 are ANDed internally in active-LOW logic: both must be LOW for decoding to occur. If either is HIGH, all 16 outputs go HIGH regardless of A0–A3 state. This allows hierarchical enable schemes - e.g., E1 controlled by system mode, E0 by local subsystem request.

Is the 74HC154DB,112 pin-compatible with the 74HCT154DB,112?

Yes - both share identical SO24 (SOT137-1) pinout, mechanical footprint, and functional behavior. The sole difference is input voltage thresholds: 74HC154DB,112 requires CMOS-level inputs (VIH ≥ 70% VCC), while 74HCT154DB,112 accepts TTL-level inputs (VIH ≥ 2.0 V) across 4.5–5.5 V operation.