Nexperia USA Inc. 74HC139DB-Q100J

Overview

74HC139DB-Q100 from Nexperia is an automotive-qualified dual 2-to-4 line decoder/demultiplexer in SSOP16 package, operating from 2.0 V to 6.0 V, with CMOS-level inputs, active-LOW mutually exclusive outputs, and AEC-Q100 Grade 1 qualification for -40 °C to +125 °C operation. It implements two independent decoders, each with enable input (nE), address inputs (nA0/nA1), and four active-LOW outputs (nY0–nY3), used in memory decoding and data routing within automotive body control modules.

For engineers reviewing the 74HC139DB-Q100 datasheet, 74HC139DB-Q100 pinout, 74HC139DB-Q100 application, or 74HC139DB-Q100 equivalent, key selection criteria include supply voltage range (2.0–6.0 V), propagation delay at 4.5 V (14 ns typ), output drive capability (±4 mA), input clamp diodes for overvoltage tolerance, and automotive-grade thermal and ESD robustness (HBM >2000 V).

Technical Context

The device integrates two identical, electrically isolated 2-to-4 decoders, each accepting binary address inputs (nA0, nA1) and an active-LOW enable (nE); when nE is HIGH, all four outputs are forced HIGH regardless of address state. Its logic function follows a strict truth table where only one output goes LOW per valid address/enable combination, ensuring mutual exclusivity.

Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, and static characteristics guarantee VIH ≥1.5 V (at VCC = 2.0 V) and VOL ≤0.26 V (IO = 4.0 mA, VCC = 4.5 V), enabling reliable interfacing with legacy 5 V TTL and modern low-voltage logic systems.

Key Specifications

Pinout & Package

74HC139DB-Q100 uses SOT338-1 (SSOP16) package: plastic shrink small outline, 16 leads, body width 4.4 mm, pitch 0.65 mm. Pin 1 index marked by notch or dot; lead finish is SnAgCu (lead-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC139DB-Q100, the SO16 variant trades board area for thermal margin and assembly flexibility, while the TSSOP HCT version swaps CMOS input thresholds for TTL compatibility - both retain identical logic function and AEC-Q100 qualification but differ in mechanical fit and interface voltage assumptions.

Availability

74HC139DB-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O expansion, medical device UI logic, and HVAC display backlight control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC139DB-Q100 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 optimized for automotive, industrial, and consumer applications, with manufacturing rooted in process reliability and AEC-Q100 leadership.

This device belongs to Nexperia's automotive-qualified 74HC logic family, designed specifically for robust, low-power decoding and signal routing in harsh-environment electronic control units where functional safety and long-term supply stability are mandatory.

FAQ

What is the maximum clock frequency supported by 74HC139DB-Q100?

The device does not operate on a clock; it is combinational logic with propagation delay specified as 14 ns typical (nAn → nYn, VCC = 4.5 V). Maximum usable toggle rate is derived from tpd and transition time: for reliable operation, input address changes should be spaced ≥35 ns apart to avoid metastability or race conditions in downstream logic.

Can 74HC139DB-Q100 interface directly with 3.3 V microcontrollers?

Yes - its CMOS inputs accept VIH ≥1.5 V at VCC = 2.0 V and ≥3.15 V at VCC = 4.5 V, providing full compatibility with 3.3 V logic outputs. With VCC = 3.3 V, VIH(min) ≈ 2.1 V (interpolated), exceeding typical 3.3 V MCU VOH(2.4 V min), ensuring noise-immune HIGH recognition.

Does this part support hot-swap or live-insertion?

No - the datasheet specifies no hot-swap qualification. Absolute maximum ratings prohibit applying input voltage before VCC is stable; clamp diodes require VCC to be present to shunt overvoltage safely. Power sequencing must follow VCC-first, then inputs, to prevent latch-up or damage.

How does the enable input function in demultiplexer mode?

When address inputs (nA0/nA1) are held constant, the enable input (nE) acts as the data input: asserting nE LOW selects the addressed output (e.g., 1Y2), while nE HIGH forces all outputs HIGH - effectively creating a 1-to-4 demux with data edge-aligned to nE transitions and deterministic <13 ns enable-to-output delay.