Nexperia USA Inc. 74HC154BQ,115

Overview

74HC154BQ,115 from Nexperia is a 4-to-16 line decoder/demultiplexer in DHVQFN24 package, operating from 2.0 V to 6.0 V supply, delivering active-LOW 16-channel decoding with dual active-LOW enable inputs (E0, E1), and specified for -40 °C to +125 °C industrial temperature range. It enables precise address selection in memory mapping and I/O expansion circuits.

For engineers reviewing the 74HC154BQ,115 datasheet, 74HC154BQ,115 pinout, 74HC154BQ,115 application, or 74HC154BQ,115 equivalent, this device supports TTL- and CMOS-level compatible logic families, offers propagation delays as low as 10 ns at 6.0 V, and integrates input clamp diodes for overvoltage-tolerant interfacing - critical for robust digital control subsystems.

Technical Context

This device implements combinational logic decoding of four binary address inputs (A0–A3) into sixteen mutually exclusive active-LOW outputs (Y0–Y15). Its dual enable architecture allows flexible use as either a decoder (with both enables tied LOW) or a 1-to-16 demultiplexer (with one enable used as data input).

Input clamping diodes permit safe interface to signals exceeding VCC when current-limiting resistors are applied. The logic is fully static CMOS, ensuring zero static power draw and high noise immunity (>50% of VCC), with latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Key Specifications

Pinout & Package

DHVQFN24 package (SOT815-1): 3.5 × 5.5 × 0.85 mm body, 24-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default; may be floated or connected to VCC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC154BQ,115, the 74HCT154BQ,115 offers superior TTL input compatibility but narrower supply range, while SN74LS154N sacrifices efficiency and flexibility for legacy 5 V integration - making the HC variant optimal for modern mixed-voltage, low-power embedded control.

Availability

74HC154BQ,115 is available at Aetrix Electronics and suitable for memory address decoding, I/O port expansion, LED matrix row selection, and industrial control logic requiring stable component supply across automotive, industrial automation, and embedded computing programs.

Supply support for 74HC154BQ,115 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 leading semiconductor manufacturer specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74HC154BQ,115 belongs to Nexperia's HC logic family, designed for low-power, wide-supply-voltage digital interfacing in space-constrained and thermally demanding environments.

FAQ

What is the maximum clock frequency supported by the 74HC154BQ,115?

The 74HC154BQ,115 is a combinational logic device with no internal clock; its usable switching rate depends on propagation delay and system timing margins. At VCC = 6.0 V, tPD = 10 ns (A→Y), supporting address changes up to ~50 MHz in well-designed synchronous systems with proper setup/hold timing.

Can the 74HC154BQ,115 drive LEDs directly?

Yes - each Yx output can sink or source up to ±25 mA. For common-anode LED arrays, connect LEDs between VCC and Yx (active-LOW drive); include current-limiting resistors calculated for forward voltage and desired brightness. Do not exceed total package power limit (500 mW).

Is the thermal pad on the DHVQFN24 package required to be soldered?

No - the exposed pad (terminal 1 index area) has no electrical requirement. If soldered, it must remain floating or be connected to VCC per Nexperia's recommendation; grounding it may impair thermal performance or cause unintended biasing of internal structures.

How does the dual-enable architecture improve system safety?

E0 and E1 are both active-LOW enables: both must be LOW for decoding. This allows hardware interlocks - e.g., E0 driven by a safety monitor circuit, E1 by the main controller. If either fails HIGH, all outputs go HIGH (safe default), preventing unintended actuation in fault conditions.