Diodes Incorporated 74AHCU04T14-13

Overview

74AHCU04T14-13 from Diodes Incorporated is an unbuffered hex inverter IC with six independent CMOS inverters, push-pull outputs, 2.0V–5.5V supply range, 5.5V-tolerant inputs, and Schmitt-trigger input action. It enables voltage translation between 3.3V and 5V domains and is used in crystal oscillator circuits, logic level shifting, and mixed-voltage digital interfaces.

For engineers reviewing the 74AHCU04T14-13 datasheet, 74AHCU04T14-13 pinout, 74AHCU04T14-13 application, or 74AHCU04T14-13 equivalent, key selection criteria include input voltage tolerance (5.5V), output drive strength (±8mA at 4.5V), propagation delay (2.4ns typ @ 5V, CL=15pF), Schmitt-trigger hysteresis for noise immunity, and TSSOP-14 package compatibility with high-density PCB layouts.

Technical Context

This device implements six identical unbuffered inverting gates with no internal stage buffering-enabling minimal propagation delay and precise timing control in feedback loops. Its Schmitt-trigger inputs provide hysteresis (typ. 0.3V at 3.3V), improving noise rejection in slow-rising or noisy signal environments.

The 74AHCU04T14-13 operates across a wide V_CC range (2.0–5.5V) while maintaining input compatibility up to 5.5V regardless of supply voltage-making it suitable for bidirectional level translation without external biasing. Output drive capability is specified at ±4mA and ±8mA under defined load conditions, supporting direct interface to standard CMOS and TTL loads.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4mm × 5.0mm body, 0.65mm pitch, 1.2mm max height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unbuffered hex inverter applications.

Compared with SN74LVC04APW and 74AHC04PW, the 74AHCU04T14-13 uniquely combines Schmitt-trigger inputs, 5.5V-tolerant I/O, and unbuffered architecture-making it the only choice among the three for reliable crystal oscillator implementation and robust mixed-voltage interfacing without additional components.

Availability

74AHCU04T14-13 is available at Aetrix Electronics and suitable for crystal oscillator design, industrial control logic, and digital voltage translation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74AHCU04T14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer applications.

The 74AHCU04 belongs to Diodes' advanced high-speed CMOS logic family, designed specifically for low-power, mixed-voltage digital interfacing and precision timing applications where signal integrity and voltage domain bridging are critical.

FAQ

Can the 74AHCU04T14-13 be used to build a Pierce oscillator?

Yes-the unbuffered inverter architecture, Schmitt-trigger inputs, and guaranteed gain across 2.0–5.5V make it suitable for Pierce oscillator circuits with standard 32.768kHz or 1–10MHz crystals. External load capacitors (typically 12–22pF) and series resistor (0–100Ω) are required per crystal manufacturer recommendations.

What is the maximum capacitive load this device can drive reliably?

The 74AHCU04T14-13 is characterized up to 50pF load capacitance with specified timing (t_PD ≤ 7.0ns at V_CC = 5V). Driving >50pF may increase propagation delay nonlinearly and risk output waveform degradation; for heavier loads, consider buffer stages or lower-frequency operation.

Is the TSSOP-14 package compatible with standard SO-14 footprints?

No-the TSSOP-14 (74AHCU04T14-13) has 0.65mm lead pitch and 4.4mm body width, while SO-14 (74AHCU04S14-13) uses 1.27mm pitch and 3.9mm width. They are mechanically incompatible; separate PCB land patterns are required for each package.

Does this device require pull-up or pull-down resistors on unused inputs?

Yes-per datasheet recommendation, unused inputs must be tied to V_CC or GND to prevent floating states that cause increased ICC, noise susceptibility, and potential thermal overstress. Internal protection diodes do not eliminate this requirement.