Nexperia USA Inc. 74LVC139D,118

Overview

74LVC139D,118 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in SO16 package, operating from 1.2 V to 3.6 V supply, with overvoltage-tolerant inputs (up to 5.5 V), Schmitt-trigger inputs for noise immunity, and mutually exclusive active-low outputs. It enables address decoding in memory subsystems and data routing in mixed-voltage digital logic systems.

For engineers reviewing the 74LVC139D,118 datasheet, 74LVC139D,118 pinout, 74LVC139D,118 application, or 74LVC139D,118 equivalent, key selection criteria include its dual independent decoder architecture, 125 °C extended temperature rating, 50 Ω transmission-line drive capability, and compatibility with both 3.3 V and 5 V input logic levels.

Technical Context

The device integrates two identical, independent 2-to-4 decoders, each with active-low enable (nE) and binary address inputs (nA0, nA1). When nE is HIGH, all four corresponding outputs (nY0–nY3) are forced HIGH; when nE is LOW, outputs decode the address and drive exactly one output LOW per decoder.

Its Schmitt-trigger inputs tolerate slow-rising/falling signals and reject noise, while overvoltage tolerance allows interfacing with 5 V TTL outputs into 3.3 V or lower LVC logic domains without level shifters. Propagation delay is as low as 2.4 ns (typ.) at VCC = 3.3 V, with output skew ≤1.5 ns across same-package outputs.

Key Specifications

Pinout & Package

74LVC139D,118 uses the SOT109-1 (SO16) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, surface-mount, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV139ADR and 74AHC139PW,118, the 74LVC139D,118 uniquely combines 1.2 V operation, 5.5 V input tolerance, Schmitt-trigger noise immunity, and 125 °C rating - making it the sole choice for robust, low-voltage, mixed-signal decoding where reliability trumps raw speed.

Availability

74LVC139D,118 is available at Aetrix Electronics and suitable for industrial control panels, programmable logic controllers, and embedded instrumentation requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVC139D,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 global semiconductor expert focused on high-volume, high-reliability essential semiconductors for automotive, industrial, and consumer applications.

The 74LVC logic family delivers low-voltage, high-noise-immunity CMOS solutions optimized for energy-efficient digital systems operating from 1.2 V to 3.6 V with robust mixed-voltage interoperability.

FAQ

Can 74LVC139D,118 operate reliably at 1.2 V supply?

Yes. The device is fully specified down to 1.2 V VCC, with guaranteed functionality including propagation delay (≤14 ns), output drive (≥4 mA), and input thresholds (VIH ≥ 0.65 × VCC) across −40 °C to +125 °C. Static current remains below 10 μA at this voltage, enabling ultra-low-power standby modes.

What is the maximum clock/data rate supported for demultiplexing?

While not a clocked device, its 2.4 ns typical propagation delay at 3.3 V supports reliable demux operation up to ~100 MHz effective switching frequency in non-clocked combinatorial routing. Output skew ≤1.5 ns ensures clean pulse distribution across all four outputs for synchronous enable applications.

Is external pull-up required on enable or output pins?

No. All outputs are actively driven HIGH or LOW - no pull-ups needed. Enable inputs (1E/2E) are standard CMOS and require defined logic levels; floating enables will cause unpredictable output states. Unused inputs must be tied HIGH or LOW per JEDEC guidelines.

How does the Schmitt-trigger input improve system robustness?

Schmitt-trigger inputs provide ~0.3 V hysteresis at 3.3 V, rejecting noise spikes <300 mV and tolerating slow edge rates (>10 ns/V). This eliminates metastability and false triggering in electrically noisy industrial environments, such as near relay coils or motor drives, without requiring external RC filters.