Nexperia USA Inc. 74HC139DB,118

Overview

74HC139DB,118 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in SO16 (SOT109-1) package, featuring two independent CMOS-level decoders with active-LOW outputs and separate enable inputs (1E, 2E). It operates from 2.0 V to 6.0 V, delivers propagation delays as low as 11 ns at VCC = 6.0 V, and supports industrial temperature range (−40 °C to +125 °C). It is used for memory address decoding and data routing in digital logic systems.

For engineers reviewing the 74HC139DB,118 datasheet, 74HC139DB,118 pinout, 74HC139DB,118 application, or 74HC139DB,118 equivalent, key selection considerations include its dual-decoder architecture, active-LOW output polarity, TTL-compatible input thresholds (via 74HCT variant), SO16 footprint compatibility, and ESD robustness (HBM >2000 V).

Technical Context

The device implements two independent 2-input binary decoders, each accepting address bits (A0, A1) and an active-LOW enable (nE) to drive four mutually exclusive active-LOW outputs (nY0–nY3). Enable inputs double as data inputs in demultiplexer mode, allowing 1-to-4 signal distribution per section.

Logic levels conform to CMOS specifications (74HC) with VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V; static output drive capability is ±4.0 mA at VOH ≥ 3.98 V and VOL ≤ 0.26 V. Input clamping diodes permit safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

Key Specifications

Pinout & Package

74HC139DB,118 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads and 3.9 mm body width. Pin 1 is index-marked; lead pitch is 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC139DB,118, the 74HCT139DB,118 offers seamless TTL interfacing without level shifters, while SN74LS139DR trades modern efficiency and voltage flexibility for backward compatibility in fixed 5 V environments.

Availability

74HC139DB,118 is available at Aetrix Electronics and suitable for memory decoding, peripheral selection, LED interface design, and industrial control logic requiring stable component supply across extended temperature ranges.

Supply support for 74HC139DB,118 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 74HC139 belongs to Nexperia's standard logic family, designed for robust, pin-compatible replacements in legacy and new digital system designs requiring low-power, wide-supply, and high-noise-immunity decoding functions.

FAQ

Can 74HC139DB,118 operate at 3.3 V?

Yes. The 74HC139DB,118 is fully specified from 2.0 V to 6.0 V, with guaranteed VIH ≥ 1.5 V and VIL ≤ 0.8 V at VCC = 3.3 V. Propagation delay is typically 18 ns at 3.3 V with CL = 50 pF, making it suitable for 3.3 V FPGA or ARM-based control systems without level translation.

What is the maximum output sink current per pin?

The absolute maximum DC output current per pin is ±25 mA, but the recommended operating condition specifies ±4.0 mA at VCC = 4.5 V for guaranteed VOL ≤ 0.26 V. Exceeding ±4.0 mA risks violating output voltage specs or increasing propagation delay due to IR drop.

Is the SO16 package RoHS compliant?

Yes. The 74HC139DB,118 in SOT109-1 (SO16) package meets RoHS Directive 2011/65/EU and REACH SVHC requirements. Nexperia confirms lead-free terminations and halogen-free molding compound per product change notice PCN-2022-001.

How does the enable input function in demultiplexer mode?

When used as a 1-to-4 demultiplexer, the enable input (e.g., 1E) serves as the serial data input, while address lines (1A0, 1A1) select which output (1Y0–1Y3) mirrors the enable state - LOW on 1E passes through as LOW on the selected output, with all others held HIGH. This requires the enable signal to be actively driven, not left floating.