NXP 74LVC138ABQ

Mfr. Part

74LVC138ABQ

Manufacturer

Freescale / NXP Semiconductors

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Detailed Description

High-speed low-voltage CMOS 3-to-8 line decoder/demultiplexer in a compact DHVQFN16 package. Three enable inputs (G1 active high, G2A and G2B active low). Eight outputs are active low (only one low at a time when enabled). Designed for fast logic decoding, low power, and small footprint applications. Main Category: Integrated Circuits (ICs). Small Classification: Specialized ICs. Available stock quantity: 105400 units.

Key Features

3-to-8 decoder/demultiplexer with one active output low at a time

Three enables: G1 (high), G2A/G2B (low) for flexible gating and cascading

LVC family performance: low-voltage operation with high speed

Broad VCC support typically from around 1.65 V to 3.6 V

Inputs typically tolerant to 5 V logic levels (family dependent; verify against datasheet)

Low static power consumption with CMOS process

Strong output drive suitable for typical digital loads

Noise-robust inputs with good immunity characteristics

Compatible with common logic families for easy drop-in design

Key Advantages

Fast switching for low-latency address decoding and selection

Small package saves board space in dense designs

Low-power operation reduces heat and extends battery life

Flexible enable scheme simplifies cascading and system gating

Broad voltage compatibility eases use across 1.8 V, 2.5 V, and 3.3 V systems

Widely used, well-supported logic function for reliable designs

Packaging

Type: DHVQFN16 (dual heat very thin QFN, 16 terminals), NXP case code 831

Material: Molded plastic, lead-free, RoHS-compliant options available (verify specific ordering code)

Size: Compact, thin QFN footprint designed for dense layouts (see datasheet for exact dimensions)

Pin configuration: 16 pins including A0, A1, A2 (address inputs); G1, G2A, G2B (enable inputs); Y0–Y7 (active-low outputs); VCC; GND

Thermal characteristics: Low thermal resistance due to QFN style; suited for high-speed logic with modest power dissipation

Electrical properties: Active-low outputs; typical LVC supply ~1.65–3.6 V; fast propagation delays; robust output drive; verify exact limits and timing in datasheet

Lifecycle

Current status: Typically active in the LVC logic portfolio. For the most up-to-date lifecycle and PCN/PDN notices, check our website or contact Y-IC sales.

Equivalent and alternative models (verify pinout, voltage range, timing, and package):

- Texas Instruments SN74LVC138A (various packages)

- onsemi MC74VHC138 (VHC family, higher speed, different voltage range)

- Nexperia 74LVC138 variants (multiple packages)

- 74HC138 / 74HCT138 / 74AHC138 (HC/HCT/AHC families, different speed and voltage characteristics)

- 74LCX138 (LCX family, different electrical traits)

If you need exact drop-in alternates for DHVQFN16 and your voltage/temperature targets, please contact our sales team via the Y-IC website for detailed cross-reference support.

Key Application Areas

Address decoding for memory and I/O selection

Demultiplexing and signal routing

Chip-select generation in microcontroller and processor systems

Peripheral enable control and bank selection

Industrial control, instrumentation, communication equipment, consumer electronics

Space-constrained designs needing fast, low-power logic

Datasheet

Y-IC provides the most authoritative datasheet for this product model on our website. We recommend downloading the datasheet directly from the current page for exact electrical limits, timing, pinout, and mechanical drawings.

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