NL74HC151ADTR2G

Updated: 2026-10-09

Overview

The NL74HC151ADTR2G is a member of the 74HC family of high-speed CMOS logic ICs, specifically designed as an 8-input digital multiplexer. Manufactured by ON Semiconductor, this device selects one of eight binary data inputs and routes it to the output based on the state of three select lines. As a surface-mount component in TSSOP-16 packaging, it's particularly valued in space-constrained applications where board real estate is limited. The HC series offers improved performance over earlier 74LS TTL logic while maintaining backward compatibility with TTL voltage levels.

Structure and Working Principle

The IC consists of input buffers, a decoder for the select lines, and transmission gate switches that connect the selected input to the output. Three binary select inputs (S0-S2) determine which of the eight data inputs (D0-D7) appears at the output pins (Y and its complementary Y̅). Internal circuitry uses CMOS technology for low static power dissipation, with typical supply currents below 10μA when idle. The device operates on the principle of transmission gate switching, where CMOS pairs act as voltage-controlled switches to pass or block signals without significant voltage drop.

Key Features

Low power consumption makes the NL74HC151ADTR2G ideal for battery-powered devices, with typical static current below 1μA. The high noise immunity characteristic of CMOS technology (about 30% of VCC) ensures reliable operation in electrically noisy environments. The device offers fast propagation delay (typically 12ns at 5V) and can drive up to 10 LSTTL loads directly. Its operating voltage range (2V to 6V) provides flexibility for both 3.3V and 5V systems, while the TSSOP-16 package (5mm × 4.4mm) saves significant PCB space compared to traditional DIP packages.

Application Areas

Primary applications include data routing in microcontroller systems, where multiple sensor inputs need selection by a processor. The complementary outputs facilitate use in parallel-to-serial conversion circuits and certain types of logic function generators. Industrial uses encompass automation control systems that require input channel selection. Consumer electronics applications include audio/video signal routing and multiplexed display driving. The device also finds use in test equipment for selecting between multiple measurement sources.

Maintenance and Precautions

Standard CMOS handling precautions apply - use anti-static measures during installation and avoid exceeding maximum ratings (7V supply voltage, 25mA output current). Ensure unused inputs are tied to ground or VCC rather than left floating to prevent erratic operation. For board design, include 0.1μF decoupling capacitors near the power pins to minimize switching noise. The device has a maximum junction temperature of 150°C, requiring thermal consideration in high-speed or high-ambient-temperature applications.

B2B Procurement Guide

When sourcing the NL74HC151ADTR2G, verify the manufacturer (ON Semiconductor) and packaging (Tape & Reel, 2500 units). Lead times typically range from stock availability to 8-12 weeks for large orders. Industrial buyers should request moisture sensitivity level (MSL) certification (typically MSL 1 for this device). For high-volume procurement, negotiate based on annual usage projections rather than one-time orders. Quality certifications to request include RoHS compliance and Pb-free status documentation.