Nexperia USA Inc. 74AHC08D,118

Overview

74AHC08D,118 from Nexperia is a quad 2-input AND gate IC in SO14 package, operating from 2.0 V to 5.5 V supply, featuring overvoltage-tolerant inputs (up to 5.5 V), Schmitt-trigger inputs for noise immunity, and specified for -40 °C to +125 °C industrial temperature range. It serves as a level-translating logic gate in mixed-voltage digital interfaces such as microcontroller I/O expansion and sensor signal conditioning.

For engineers reviewing the 74AHC08D,118 datasheet, 74AHC08D,118 pinout, 74AHC08D,118 application, or 74AHC08D,118 equivalent, key selection criteria include input voltage tolerance, propagation delay at 3.3 V/5 V, output drive strength (±8 mA), thermal performance in SO14, and compatibility with TTL- or CMOS-level source signals.

Technical Context

The 74AHC08D implements four independent AND gates with identical CMOS-level input thresholds (VIH = 3.85 V @ VCC = 5.5 V; VIL = 1.65 V), enabling robust operation across 2.0–5.5 V supplies. Each gate exhibits balanced tPLH/tPHL propagation delays - 3.0 ns typical at 5 V/15 pF - and supports rail-to-rail output swing with VOL ≤ 0.36 V @ 8 mA sink.

Its overvoltage-tolerant inputs allow direct interfacing between 3.3 V logic domains and 5 V peripherals without external level shifters. The device integrates Schmitt-trigger action on all inputs, providing hysteresis (typically 0.3 V) to suppress noise-induced switching in noisy industrial environments.

Key Specifications

Pinout & Package

74AHC08D,118 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width. Pin 1 is index-marked; pin 7 is GND; pin 14 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with 74AHC08D,118, the 74AHCT08D,118 offers easier integration with older 5 V logic but sacrifices input noise margin, while SN74LVC08APWR delivers faster switching at lower voltages but demands rework for package compatibility and lacks overvoltage tolerance.

Availability

74AHC08D,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller GPIO multiplexing, and sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74AHC08D,118 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74AHC series targets general-purpose CMOS logic applications demanding wide supply range, low power, and robust noise immunity - especially where mixed-voltage interfacing and extended temperature operation are required.

FAQ

Can 74AHC08D,118 interface directly between a 3.3 V microcontroller and a 5 V display controller?

Yes. Its overvoltage-tolerant inputs accept up to 5.5 V regardless of VCC, allowing 3.3 V logic outputs to drive the 74AHC08D,118's A/B inputs while its outputs swing rail-to-rail to 5 V when VCC = 5 V - eliminating external level shifters in this configuration.

What is the maximum capacitive load the 74AHC08D,118 can drive while maintaining 5 ns propagation delay?

At VCC = 5.0 V, the typical propagation delay remains ≤5 ns for loads up to 50 pF (per datasheet Table 7). Beyond 50 pF, delay increases linearly - e.g., ~7.5 ns at 100 pF - due to increased RC time constant at the output node.

Does the SO14 package (SOT108-1) support reflow soldering per JEDEC J-STD-020?

Yes. The SO14 package is qualified for standard lead-free reflow profiles, including peak temperatures up to 260 °C for 30 seconds. Thermal derating begins above 100 °C ambient, with Ptot decreasing by 10.1 mW/K - critical for high-density PCB layouts.

How does the Schmitt-trigger input improve reliability in motor drive feedback circuits?

The built-in hysteresis (~0.3 V) prevents multiple transitions during slow or noisy edge transitions - common in hall-effect sensor outputs near rotating metal. This eliminates false triggering without requiring external RC filters or firmware debouncing.