NXP Semiconductors 74LV139DB,112

Overview

74LV139DB,112 from NXP Semiconductors is a dual 2-to-4 line decoder/demultiplexer in SSOP16 package, operating from 1.0 V to 5.5 V supply, with active LOW enable inputs and mutually exclusive LOW-active outputs. It delivers 11 ns typical propagation delay at 3.3 V (CL = 15 pF), supports TTL-level inputs at 2.7–3.6 V, and is rated for −40 °C to +125 °C industrial temperature range.

For engineers reviewing the 74LV139DB,112 datasheet, 74LV139DB,112 pinout, 74LV139DB,112 application, or 74LV139DB,112 equivalent, this device serves as a low-voltage logic building block for address decoding, memory selection, and data routing in embedded control, instrumentation, and industrial I/O systems where supply flexibility and noise-immune demultiplexing are required.

Technical Context

The 74LV139DB,112 implements two independent CMOS decoder channels, each accepting two binary address inputs (A0, A1) and asserting one of four LOW outputs (Y0–Y3) when its dedicated active LOW enable (nE) is asserted. Outputs remain HIGH when nE is HIGH, enabling use as a 1-to-4 demultiplexer with nE as the data input.

Its Si-gate CMOS architecture ensures pin and functional compatibility with 74HC139 and 74HCT139, while optimized low-voltage operation down to 1.0 V supports modern mixed-supply systems. Input transition rate limits (e.g., 100 ns/V at 2.7–3.6 V) and ground bounce < 0.8 V at 3.3 V reflect design attention to signal integrity in dense PCB layouts.

Key Specifications

Pinout & Package

74LV139DB,112 uses the SSOP16 (SOT338-1) package: plastic shrink small outline, 16 leads, body width 5.3 mm, 0.65 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV139D,118 and SN74LV139ADBR, the 74LV139DB,112 offers optimal board area efficiency in SSOP16 while maintaining full functional equivalence and NXP's −40 °C to +125 °C qualification - making it ideal for thermally dense industrial controllers where package size and temperature margin are critical.

Availability

74LV139DB,112 is available at Aetrix Electronics and suitable for memory decoding, peripheral selection, LED multiplexing, and industrial I/O expansion requiring stable component supply across automotive, industrial automation, and test equipment programs.

Supply support for 74LV139DB,112 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LV139DB,112 belongs to NXP's LV logic family, designed specifically for low-voltage, high-noise-immunity digital interfacing in mixed-supply embedded systems where power efficiency and signal integrity are essential.

FAQ

What is the maximum supply voltage rating for the 74LV139DB,112?

The 74LV139DB,112 has an absolute maximum supply voltage (VCC) of +7.0 V, but its recommended operating range is 1.0 V to 5.5 V. Operation above 5.5 V risks permanent damage, and functionality is not guaranteed outside the 1.0–5.5 V range per the datasheet's recommended conditions. The 74LV139DB,112 must be operated within these limits to ensure reliable decoding behavior and long-term reliability.

Does the 74LV139DB,112 support TTL-level inputs?

Yes, the 74LV139DB,112 accepts TTL input voltage levels when VCC is between 2.7 V and 3.6 V, with VIH ≥ 2.0 V and VIL ≤ 0.8 V. This allows direct interfacing with legacy 74LS or microcontroller GPIOs without level-shifting circuitry. The 74LV139DB,112 maintains this compatibility while operating at lower supply voltages, enhancing system-level power efficiency.

How does the enable input function in demultiplexer mode for the 74LV139DB,112?

In demultiplexer mode, the 74LV139DB,112 uses its active LOW enable input (e.g., 1E) as the data input: when 1E is driven LOW or HIGH, that logic level appears inverted on the selected output (Y0–Y3) while other outputs remain HIGH. For example, with A0=A1=0, a LOW on 1E drives Y0 LOW; a HIGH on 1E forces Y0 HIGH. This behavior is confirmed in Table 3 of the 74LV139DB,112 datasheet.

What is the propagation delay of the 74LV139DB,112 at 3.3 V supply?

At VCC = 3.3 V with CL = 15 pF, the 74LV139DB,112 exhibits a typical propagation delay (tpd) of 11 ns for address-to-output transitions (nAn → nYn) and 10 ns for enable-to-output transitions (nEn → nYn). Maximum values are 18 ns and 16 ns respectively across −40 °C to +125 °C, ensuring predictable timing in real-time control loops.

Is the 74LV139DB,112 pin-compatible with 74HC139 and 74HCT139?

Yes, the 74LV139DB,112 is explicitly stated as pin and function compatible with 74HC139 and 74HCT139. Its SSOP16 pinout matches the functional assignments of those families (e.g., pin 1 = 1E, pin 2 = 1A0), allowing drop-in replacement in existing designs - provided voltage and timing requirements align with the LV family's 1.0–5.5 V range and faster AC characteristics. The 74LV139DB,112 retains identical logic truth tables and pin definitions.