Renesas 74HC139FP-E

Overview

74HC139FP-E from Renesas is a dual 2-to-4-line decoder/demultiplexer in SOP-16 package, operating from 2 V to 6 V supply, with propagation delay of 15 ns (typ, VCC = 4.5 V), fanout of 10 LSTTL loads, and quiescent ICC ≤ 4 µA - used for address decoding and signal routing in microcontroller peripheral interfaces.

For engineers reviewing the 74HC139FP-E datasheet, 74HC139FP-E pinout, 74HC139FP-E application, or 74HC139FP-E equivalent, this page delivers verified functional behavior, validated pin mapping, real-world timing constraints, and precise substitution guidance for industrial control logic design.

Technical Context

The 74HC139FP-E integrates two independent decoders, each with active-low enable (1G/2G) and dual select inputs (1A/1B, 2A/2B), driving four active-low outputs (Y0–Y3) per section. Outputs switch only when enable is asserted low and select inputs define one-of-four states.

Each decoder operates as a combinational logic block with no internal latching or clocking - output transitions follow input changes with tPLH/tPHL ≤ 30 ns (VCC = 4.5 V, CL = 50 pF). Input voltage thresholds VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V ensure robust noise margin in mixed-voltage systems.

Key Specifications

Pinout & Package

SOP-16 package (JEITA standard, PRSP0016DH-B, FP-16DAV), 1.27 mm pitch, body size 5.5 mm × 10.06 mm, gull-wing leads, Ni/Pd/Au plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC139DR and MC74HC139ADTR2G, the 74HC139FP-E offers the fastest typical propagation delay (15 ns) in a JEITA-standard SOP-16 package, making it optimal for timing-critical industrial control where both speed and manufacturability matter.

Availability

74HC139FP-E is available at Aetrix Electronics and suitable for industrial PLCs, microcontroller-based instrumentation, legacy bus interface cards, and LED multiplexing systems requiring stable component supply and long-term sourcing continuity.

Supply support for 74HC139FP-E 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

Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and logic devices for industrial, automotive, and infrastructure markets.

The HD74HC139 product line delivers high-speed CMOS logic solutions optimized for address decoding, signal routing, and peripheral selection in cost-sensitive industrial control systems.

FAQ

What is the maximum operating frequency supported by the 74HC139FP-E?

The 74HC139FP-E does not have a clock input and is purely combinational logic, so it has no defined "operating frequency." Its usable switching rate depends on propagation delay and system timing margins: with tPD ≤ 30 ns (max, VCC = 4.5 V), it supports reliable address decode cycles up to approximately 16 MHz in worst-case setups. The 74HC139FP-E must be evaluated against actual board-level rise times and load capacitance.

Can the 74HC139FP-E operate at 3.3 V supply voltage?

Yes, the 74HC139FP-E is fully specified for VCC = 2 V to 6 V, including 3.3 V operation. At VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V and VIL ≤ 1.1 V per datasheet, providing >0.8 V noise margin. The 74HC139FP-E maintains tPD ≤ 22 ns (max) and ICC ≤ 4 µA at this voltage, making it compatible with 3.3 V microcontrollers without level translation.

Are the two decoder sections of the 74HC139FP-E electrically isolated?

Yes, the two decoder sections in the 74HC139FP-E are fully independent: 1G/1A/1B/1Y0–1Y3 share no internal nodes with 2G/2A/2B/2Y0–2Y3 except VCC and GND. This allows separate enable control, different input sources, and concurrent operation - for example, one section can decode address while the other manages reset sequencing. The 74HC139FP-E pinout reflects this physical separation in its SOP-16 layout.

Does the 74HC139FP-E include internal pull-up or pull-down resistors on inputs?

No, the 74HC139FP-E has no internal pull-up or pull-down resistors on any inputs (1G, 1A, 1B, 2G, 2A, 2B). All inputs are CMOS high-impedance and require explicit termination to VCC or GND in floating conditions to prevent metastability or excessive ICC. This is confirmed by the absolute maximum rating for input voltage (–0.5 V to VCC + 0.5 V) and the absence of pull-resistor specifications in the Electrical Characteristics table of the 74HC139FP-E datasheet.

What is the recommended PCB layout practice for minimizing noise coupling on the 74HC139FP-E?

Place a 100 nF ceramic decoupling capacitor between VCC (pin 9) and GND (pin 8) as close as possible to the 74HC139FP-E body. Route GND and VCC traces with minimum loop area; avoid running sensitive analog traces adjacent to 74HC139FP-E output lines. Keep input traces short and away from clock or switching node routing - the 74HC139FP-E's 5 pF typical input capacitance makes it susceptible to crosstalk if routed near noisy signals.