NXP Semiconductors 74LV139D,112

Overview

74LV139D,112 from NXP Semiconductors is a dual 2-to-4 line decoder/demultiplexer in SO16 package, operating from 1.0 V to 5.5 V supply, with active LOW enable inputs and mutually exclusive LOW-active outputs. It features two independent decoders, each accepting binary inputs (A0/A1) and delivering four decoded outputs (Y0–Y3), supporting demultiplexing applications in low-voltage digital logic systems such as address decoding in microcontroller peripherals.

For engineers reviewing the 74LV139D,112 datasheet, 74LV139D,112 pinout, 74LV139D,112 application, or 74LV139D,112 equivalent, this device serves as a drop-in replacement for 74HC139/74HCT139 in 3.3 V and mixed-voltage systems, with verified TTL input compatibility at 2.7–3.6 V, ground bounce < 0.8 V, and propagation delays as low as 10 ns at 3.3 V.

Technical Context

The 74LV139D,112 implements two independent CMOS decoder blocks, each with active LOW enable (1E/2E), two address inputs (1A0/1A1 and 2A0/2A1), and four active LOW outputs (1Y0–1Y3 and 2Y0–2Y3). Its logic function is fully defined by the truth table: when enable is HIGH, all outputs are forced HIGH; when enabled, only one output per decoder goes LOW based on the 2-bit address.

It operates across −40 °C to +125 °C, supports static operation down to 1.0 V, and delivers guaranteed performance at 3.3 V with typical tpd = 11 ns (A→Y) and 10 ns (E→Y) under CL = 15 pF. Input transition rate limits vary with VCC (e.g., ≤100 ns/V at 2.7–3.6 V), ensuring robust timing margin in noise-prone environments.

Key Specifications

Pinout & Package

74LV139D,112 uses SO16 (SOT109-1) package: plastic small outline, 16 leads, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC139D,653, the 74LV139D,112 enables true single-supply operation down to 1.0 V and cuts propagation delay by ~45 % at 3.3 V; versus SN74LV139ADBR, it offers identical functionality but differs in thermal resistance and qualification scope - both remain functionally interchangeable in non-automotive industrial use.

Availability

74LV139D,112 is available at Aetrix Electronics and suitable for memory address decoding, peripheral select logic, LED segment driver enable, and test mode selector applications requiring stable component supply across industrial temperature ranges and multi-voltage designs.

Supply support for 74LV139D,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 markets.

The 74LV139D,112 belongs to NXP's LV logic family, designed specifically for low-voltage interoperability across heterogeneous digital systems - bridging legacy 5 V, modern 3.3 V, and emerging ultra-low-power 1.2–1.8 V domains without level shifters.

FAQ

What is the minimum supply voltage for reliable operation of the 74LV139D,112?

The 74LV139D,112 is specified to operate reliably down to 1.0 V supply voltage, with full static functionality guaranteed across −40 °C to +125 °C. At 1.0 V, input levels are interpreted as GND (LOW) or VCC (HIGH); propagation delay increases to 70 ns, but logic behavior remains compliant with the truth table. This makes the 74LV139D,112 uniquely suited for battery-powered or energy-harvesting systems where supply rails dip below 1.2 V.

Is the 74LV139D,112 pin-compatible with the 74HC139 series?

Yes, the 74LV139D,112 is explicitly pin and function compatible with 74HC139 and 74HCT139 devices, sharing identical SO16 pinout, logic symbol, and truth table. However, due to its lower threshold voltages and wider VCC range, the 74LV139D,112 can replace 74HC139 in 3.3 V systems without pull-ups and supports direct 1.8 V interface where HC variants would fail. The 74LV139D,112 retains the same pin numbering and electrical loading characteristics.

Can the 74LV139D,112 be used as a 1-to-4 demultiplexer?

Yes, the 74LV139D,112 supports demultiplexing by using the active LOW enable input (1E or 2E) as the data input and the address inputs (1A0/1A1 or 2A0/2A1) as select lines. When the enable is driven by the data signal, the four outputs replicate the data state in encoded form - LOW when selected, HIGH otherwise. This eliminates need for additional logic gates in serial-to-parallel conversion or signal routing applications, and the 74LV139D,112 maintains consistent timing whether used as decoder or demux.

What is the maximum output current per pin on the 74LV139D,112?

The 74LV139D,112 supports ±6 mA DC output current per Y output at VCC = 3.0 V (sink/source), and ±12 mA at VCC = 4.5 V. Absolute maximum ratings specify ±25 mA per output, but sustained operation above ±6 mA at 3.3 V risks exceeding total power dissipation limits (500 mW for SO16). For driving LEDs or small relays, the 74LV139D,112 can directly sink up to 6 mA per output with VOL ≤ 0.4 V, making discrete drivers unnecessary in many cases.

Does the 74LV139D,112 support TTL input levels?

Yes, the 74LV139D,112 accepts TTL input voltage levels when VCC is between 2.7 V and 3.6 V - VIH ≥ 2.0 V and VIL ≤ 0.8 V meet standard TTL thresholds. This allows direct connection to 5 V TTL outputs (e.g., 74LSxx) without level-shifting resistors, provided VCC is set to 3.3 V. Input leakage remains below 1.0 µA, ensuring minimal loading on upstream drivers. The 74LV139D,112 thus bridges legacy and modern logic families in mixed-voltage boards.