NXP Semiconductors 74HC139N,652

Overview

74HC139N,652 from NXP Semiconductors is a dual 2-to-4 line decoder/demultiplexer in 16-pin DIP package, operating at 2–6 V supply, with typical propagation delay of 11 ns (nA→nY) at 5 V, active LOW outputs, and independent enable-controlled decoding paths. It serves in memory address decoding and data routing within TTL- and CMOS-compatible digital systems.

For engineers reviewing the 74HC139N,652 datasheet, 74HC139N,652 pinout, 74HC139N,652 application, or 74HC139N,652 equivalent, key selection criteria include enable-controlled demultiplexing, dual-decoder independence, active LOW output logic, standard-output drive capability, and compatibility with 74HCT-level input thresholds.

Technical Context

The 74HC139N,652 implements two fully independent 2-to-4 decoders, each with binary address inputs (nA0/nA1), active LOW enable (nE), and four mutually exclusive active LOW outputs (nY0–nY3). Enable input functions as data input in demultiplexer mode, allowing 1-to-4 signal distribution per section.

It uses high-speed Si-gate CMOS technology, meets JEDEC Std 7A, and is pin compatible with LSTTL. Input thresholds follow HC logic levels (VI = GND to VCC), and output drive matches standard CMOS loads without buffer amplification.

Key Specifications

Pinout & Package

74HC139N,652 is supplied in a 16-pin plastic dual in-line package (DIP) with 0.3-inch body width and through-hole mounting. Pin 1 is marked with a notch or dot; pin numbering follows standard DIP convention (counterclockwise from top-left).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC139N,652, the 74HCT139N,652 offers identical functionality with TTL-level inputs, while SN74LS139N provides legacy bipolar performance at higher power and reduced voltage flexibility - making the HC variant optimal for new 2–6 V mixed-signal or battery-operated designs.

Availability

74HC139N,652 is available at Aetrix Electronics and suitable for memory decoding, data routing, code conversion, and LED multiplexing applications requiring stable component supply, long-term industrial availability, and RoHS-compliant through-hole logic.

Supply support for 74HC139N,652 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in logic IC design dating to Philips Semiconductor.

The 74HC139N,652 belongs to the 74HC/HCT high-speed CMOS logic family, engineered for low-power, pin-compatible upgrades of TTL logic in general-purpose digital systems - emphasizing reliability, wide supply range, and interoperability across voltage domains.

FAQ

What is the supply voltage range supported by the 74HC139N,652?

The 74HC139N,652 operates over a supply voltage range of 2.0 V to 6.0 V. This wide range allows direct integration into both 3.3 V and 5 V digital systems without level translation. The device maintains specified timing and output drive across this range, with propagation delays degrading predictably below 2 V or above 6 V - outside which 74HC139N,652 is not guaranteed to function correctly.

Does the 74HC139N,652 support demultiplexer operation?

Yes, the 74HC139N,652 supports demultiplexer operation via its active LOW enable inputs (1E and 2E). When used as a 1-to-4 demux, the enable pin acts as the data input while A0 and A1 serve as the 2-bit channel select. Each decoder section of the 74HC139N,652 can independently perform this function, enabling two concurrent 1-to-4 signal distributions.

Are the outputs of the 74HC139N,652 actively driven HIGH or only pulled HIGH?

The outputs of the 74HC139N,652 are actively driven LOW and weakly pulled HIGH via internal CMOS pull-ups. They are specified as "standard output capability", meaning they source minimal current in HIGH state (typically < 20 µA) but sink up to 4 mA in LOW state. This asymmetry makes the 74HC139N,652 ideal for driving active LOW loads such as reset lines or common-cathode LEDs.

Can the 74HC139N,652 replace a 74LS139 in an existing design?

Yes, the 74HC139N,652 is pin compatible with the 74LS139 and shares identical pinout and logic function. However, due to CMOS input structure, it draws significantly less quiescent current and operates over a wider voltage range. To ensure reliable operation, verify that driving sources meet HC input voltage thresholds (VIH ≥ 3.5 V at VCC = 5 V); if interfacing with older TTL, consider 74HCT139N,652 instead.

What is the maximum operating temperature range for the 74HC139N,652?

The 74HC139N,652 is rated for operation from −40 °C to +125 °C, meeting industrial-grade thermal requirements. This rating is confirmed in the AC characteristics tables of the official datasheet, where propagation delays and transition times are specified across the full −40 °C to +125 °C range at VCC = 2.0 V, 4.5 V, and 6.0 V - ensuring robust performance in extended-temperature embedded environments.