Nexperia USA Inc. 74HC139PW,118

Overview

74HC139PW,118 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in TSSOP16 package, operating from 2.0 V to 6.0 V, with active-LOW mutually exclusive outputs (1Y0–1Y3, 2Y0–2Y3), two independent enable inputs (1E, 2E), and CMOS-level input compatibility. It performs memory address decoding and data routing in digital logic systems with propagation delays as low as 11 ns at VCC = 6.0 V.

For engineers reviewing the 74HC139PW,118 datasheet, 74HC139PW,118 pinout, 74HC139PW,118 application, or 74HC139PW,118 equivalent, key selection criteria include its dual-decoder architecture, TTL-compatible variant (74HCT139PW), active-LOW output polarity, -40 °C to +125 °C temperature range, and TSSOP16 footprint for high-density PCB layouts.

Technical Context

This device integrates two independent 2-to-4 decoders on a single die, each accepting two binary address inputs (A0, A1) and one active-LOW enable (nE). When nE is HIGH, all four outputs per decoder are forced HIGH; when nE is LOW, outputs decode the address and drive exactly one output LOW.

The design supports demultiplexing by using nE as the data input - applying a signal to nE while holding A0/A1 constant routes that signal to one of four outputs. Inputs include clamp diodes enabling safe interfacing with voltages exceeding VCC via 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 pitch - optimized for automated SMT placement and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC139PW,118, the 74HCT139PW,118 offers seamless integration into mixed-signal 5 V systems, while SN74LS139DR trades efficiency and flexibility for direct drop-in replacement in aging TTL designs - neither matches the HC version's 2.0–6.0 V operation or -40 °C to +125 °C rating.

Availability

74HC139PW,118 is available at Aetrix Electronics and suitable for memory decoding, industrial I/O expansion, and LED multiplexing applications requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for 74HC139PW,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 delivering high-performance logic, analog, and MOSFET solutions with focus on reliability, efficiency, and manufacturability for industrial and consumer electronics.

The 74HC139 belongs to Nexperia's 74HC logic family - designed for low-power, high-noise-immunity digital control in space- and energy-constrained embedded systems.

FAQ

Can 74HC139PW,118 operate at 3.3 V supply?

Yes. The 74HC139PW,118 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH = 2.1 V (min), VOL ≤ 0.33 V (at 4 mA), and tPD ≤ 22 ns - meeting requirements for modern 3.3 V microcontrollers and FPGAs without level translation.

What is the maximum clock/data rate supported in demultiplexer mode?

In demux mode (using nE as data input), the maximum reliable data rate is determined by propagation delay (tpd ≤ 22 ns at VCC = 3.3 V) and transition time (tt ≤ 19 ns). This supports clean 20 Mbps data distribution with adequate setup/hold margins for standard CMOS loads.

Are the outputs truly mutually exclusive under all conditions?

Yes. The functional table and logic diagram confirm that only one output per decoder is LOW for any combination of valid address inputs (A0, A1) and active-LOW enable (nE). When nE is HIGH, all outputs are HIGH - no contention or partial activation occurs.

Does this part include internal pull-up or pull-down resistors on inputs?

No. The 74HC139PW,118 has no internal bias resistors. Inputs are high-impedance CMOS and require external pull-up or pull-down resistors if left unconnected - floating inputs may cause increased ICC or erratic output behavior due to noise sensitivity.