NXP Semiconductors 74HC08D/AUJ

Overview

74HC08D/AUJ from NXP USA Inc. is a quad 2-input AND gate designed for general-purpose CMOS logic, enable gating, address qualification, control-signal combination, chip-select generation, and embedded digital control applications. The device integrates four independent 2-input AND gates in a 14-lead SOIC package, allowing multiple logic qualification functions to be implemented with one standard logic IC.

As part of the 74HC08 high-speed CMOS logic family, 74HC08D/AUJ combines a 2.0V to 6.0V supply range, CMOS input levels, low power dissipation, high noise immunity, input clamp diodes, and standard AND-gate functionality for flexible board-level logic integration. For engineers reviewing the 74HC08D/AUJ datasheet, 74HC08D/AUJ pinout, 74HC08D/AUJ application, or 74HC08D/AUJ equivalent, this device is widely used in enable logic, address decoding, signal gating, control-line qualification, embedded controllers, industrial boards, communication modules, and general-purpose CMOS logic designs.

Technical Context

In digital logic systems, 74HC08D/AUJ provides four independent AND gates. Each gate outputs HIGH only when both corresponding inputs are HIGH; if either input is LOW, the output remains LOW. This function is useful for combining enable conditions, qualifying address or control signals, and generating positive-true logic decisions from two input conditions.

The HC version uses CMOS input thresholds and operates across a 2.0V to 6.0V supply range, making it suitable for CMOS-level 3.3V and 5V systems. Compared with HCT versions, the HC device is not intended for TTL-level input thresholds; designers should verify that the driving circuit provides valid CMOS HIGH and LOW levels for the selected VCC.

The device includes input clamp diodes, allowing inputs to be interfaced to voltages above VCC through current-limiting resistors. This can simplify certain mixed-voltage interface cases, but input clamp current, output ratings, and absolute maximum limits must still be respected during circuit design.

Key Specifications

Pinout & Package

The 74HC08D/AUJ pinout uses a 14-lead SOIC package with four independent AND gate sections. Gate 1 uses inputs 1A and 1B with output 1Y; gate 2 uses 2A and 2B with output 2Y; gate 3 uses 3A and 3B with output 3Y; and gate 4 uses 4A and 4B with output 4Y. Pin 7 is GND and pin 14 is VCC.

For PCB implementation, VCC should be bypassed close to the package, unused inputs should be tied to VCC or GND, and output loading should remain within recommended logic-family limits. Since AND gates are commonly used for enable and address qualification, clean input transitions and valid timing relationships should be maintained to avoid unintended output pulses.

Key Features

• Quad 2-input AND gate with four independent logic gates.
• Positive-true AND logic supports enable gating and signal qualification.
• Wide 2.0V to 6.0V operating supply range for CMOS logic systems.
• CMOS low power dissipation and high noise immunity.
• CMOS input threshold behavior for 74HC08 logic systems.
• Input clamp diodes support current-limited interfacing above VCC.
• HBM and CDM ESD protection support robust handling and assembly.
• Latch-up performance exceeds 100mA per JESD 78 Class II Level B.
• SO14 package supports standard surface-mount digital logic layouts.
• Suitable for address qualification, enable gating, control logic, and embedded digital systems.

Applications

Equivalent & Alternatives

When evaluating 74HC08D/AUJ equivalent devices, engineers should compare logic family, input threshold type, supply-voltage range, package footprint, propagation delay, output drive, operating temperature, ESD rating, and pin-to-pin compatibility.

Compared with 74HCT08D, 74HC08D/AUJ is optimized for CMOS-input logic systems and wider 2.0V to 6.0V operation rather than TTL-level 5V input compatibility. 74HC08D/AUJ vs 74HC08PW selection depends mainly on package footprint, PCB area, assembly preference, and existing SO14 or TSSOP14 layout qualification.

Quality

74HC08D/AUJ should be sourced as original NXP or Nexperia-family components through traceable and controlled supply channels. Quality verification procedures may include package inspection, top-mark validation, solderability testing, pin continuity checks, input threshold verification, functional AND truth-table testing, output-level measurement, and incoming inspection according to standard logic production requirements.

Because the device is frequently used in enable, address, and control logic, system reliability depends on valid CMOS input levels, clean supply decoupling, stable input timing, tied unused inputs, correct output loading, and verified logic polarity. Traceable sourcing supports manufacturing quality and reduces counterfeit supply-chain risk for standard logic production programs.

Availability

74HC08D/AUJ available at Aetrix Electronics and suitable for AND-gate logic, address qualification, enable gating, control-line combination, embedded control, industrial boards, communication modules, and general-purpose CMOS logic systems requiring stable component supply and repeatable production support.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and long-term availability support for OEM manufacturers, embedded-system developers, industrial-control designers, logic-board builders, and electronics production programs.

For production deployment, confirming logic family, supply voltage, input threshold compatibility, package footprint, propagation-delay margin, output loading, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

NXP USA Inc. is associated with a broad semiconductor portfolio covering microcontrollers, processors, connectivity, interface devices, security ICs, analog products, and legacy standard logic lines used across automotive, industrial, communication, and embedded electronic systems.

The 74HC logic portfolio associated with NXP and Nexperia-style standard logic focuses on CMOS gate functions, broad voltage support, low power dissipation, high noise immunity, compact package options, and long-term availability for embedded logic, interface control, board-level signal qualification, and general-purpose digital systems.

FAQ

What is 74HC08D/AUJ used for?

74HC08D/AUJ is used for AND-gate logic, enable gating, address qualification, control-signal combination, chip-select generation, embedded control, industrial boards, and general-purpose CMOS digital systems.

Where can I find the 74HC08D/AUJ datasheet download?

The 74HC08D/AUJ datasheet is available from the supplied 74HC/HCT08 documentation and includes the functional diagram, pinout, truth table, recommended operating conditions, static characteristics, switching specifications, package data, and ordering information.

What should be considered in 74HC08D/AUJ PCB design?

PCB implementation should provide close VCC decoupling, stable ground routing, tied unused inputs, clean CMOS input transitions, correct output loading, and package footprint verification for the SO14 / SOT108-1 layout.

What logic function does 74HC08D/AUJ provide?

74HC08D/AUJ provides four independent 2-input AND gates. Each output is HIGH only when both corresponding inputs are HIGH.

What are common 74HC08D/AUJ equivalent solutions?

Common alternatives include 74HCT08D, 74HC08PW, SN74HC08DR, and CD74HC08M depending on input threshold requirements, package footprint, supply voltage, timing, output loading, and sourcing continuity.