Nexperia USA Inc. 74HCT139PW-Q100J

Overview

74HCT139PW-Q100 from Nexperia is an automotive-qualified dual 2-to-4 line decoder/demultiplexer in TSSOP16 package, operating from -40 °C to +125 °C with TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), active-LOW mutually exclusive outputs, and propagation delay of 16–51 ns (VCC = 4.5 V, CL = 50 pF). It enables memory address decoding and data routing in engine control units and body electronics.

For engineers reviewing the 74HCT139PW-Q100 datasheet, 74HCT139PW-Q100 pinout, 74HCT139PW-Q100 application, or 74HCT139PW-Q100 equivalent, key selection criteria include automotive AEC-Q100 Grade 1 qualification, dual independent decoder architecture, TTL-level input compatibility, active-LOW output logic, and TSSOP16 thermal performance under 125 °C ambient conditions.

Technical Context

The device integrates two functionally identical 2-to-4 decoders, each with separate address inputs (A0, A1), enable (nE), and four active-LOW outputs (nY0–nY3). Enable inputs serve as demultiplexer data paths when used with address lines.

Logic operation follows strict truth table behavior: nE HIGH forces all outputs HIGH; nE LOW enables decoding where only one output goes LOW per unique 2-bit address. Inputs feature clamp diodes for overvoltage tolerance with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 4.4 mm body width, 0.65 mm lead pitch, optimized for high-density PCB layouts and thermal dissipation in automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-to-4 decoder/demultiplexer applications.

Compared with 74HC139PW-Q100, the 74HCT139PW-Q100 offers guaranteed TTL input compatibility essential for mixed-technology automotive boards, while SN74LS139DR provides pin-equivalent legacy support but fails AEC-Q100 and thermal requirements for modern vehicle platforms.

Availability

74HCT139PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor hubs requiring stable component supply across automotive production lifecycles.

Supply support for 74HCT139PW-Q100 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 specializing in high-performance, high-reliability logic, analog, and discrete components, with leadership in automotive-grade standard products.

The 74HCT series targets automotive and industrial applications demanding TTL-compatible interfacing, AEC-Q100 qualification, and robust operation across extended temperature ranges.

FAQ

What is the maximum clock frequency supported by the 74HCT139PW-Q100?

The 74HCT139PW-Q100 is a combinational logic device without a clock input; its operational speed is defined by propagation delay (16–51 ns at VCC = 4.5 V). It supports address/data switching up to approximately 20 MHz in practical routing applications, limited by output load capacitance and PCB trace impedance rather than internal clocking.

Can the 74HCT139PW-Q100 be used as a 1-to-4 demultiplexer?

Yes - each decoder section functions as a 1-to-4 demultiplexer when its enable input (nE) serves as the data input and address inputs (nA0, nA1) select the output channel. With nE LOW, only the addressed output goes LOW; with nE HIGH, all outputs remain HIGH, satisfying standard demux truth table behavior.

Does the 74HCT139PW-Q100 require external pull-up resistors on its outputs?

No - outputs are actively driven both HIGH and LOW. However, pull-ups may be added for fail-safe states (e.g., ensuring HIGH during power-up before initialization), though they increase static current. The device's ±4 mA drive strength supports direct connection to CMOS/TTL loads without external biasing.

How does the TSSOP16 package affect thermal performance compared to SO16?

The TSSOP16 (SOT403-1) has lower thermal resistance than SO16 (SOT109-1): Ptot derates at 8.5 mW/K above 91 °C versus 12.4 mW/K above 110 °C. Its thinner profile and exposed pad option improve heat transfer in compact automotive modules, making it preferred for high-density, thermally constrained layouts despite identical electrical specs.