Diodes Incorporated 74AHCU04S14-13

Overview

74AHCU04S14-13 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 supports voltage translation between 3.3V and 5V systems and is commonly used in crystal oscillator circuits and general-purpose logic interfacing.

For engineers reviewing the 74AHCU04S14-13 datasheet, 74AHCU04S14-13 pinout, 74AHCU04S14-13 application, or 74AHCU04S14-13 equivalent, key selection criteria include input voltage tolerance, propagation delay at 15pF load (2.4ns typ @ 5V), output drive capability (±8mA), Schmitt-trigger hysteresis, and SO-14 package compatibility with legacy 74-series footprints.

Technical Context

This device implements six identical unbuffered inverting gates with no internal stage buffering-enabling fast edge response and low capacitive loading. Each gate features Schmitt-trigger inputs for noise immunity and hysteresis (typ. 0.5V at V_CC = 5V), and operates across a wide supply range without level-shifting circuitry.

The 74AHCU04S14-13 delivers rail-to-rail CMOS output swing, sinks or sources up to 8mA per output at V_CC = 4.5V, and maintains stable timing performance over –40°C to +125°C ambient temperature with propagation delay as low as 2.4ns (typ.) under 15pF load at 5V.

Key Specifications

Pinout & Package

74AHCU04S14-13 is housed in a 14-pin SOIC (SO-14) package with standard 1.27mm pitch, JEDEC MS-012 compliant outline, and surface-mount footprint compatible with automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC04APWR and 74HCU04D,653, the 74AHCU04S14-13 uniquely combines Schmitt-trigger inputs, 5.5V input tolerance, and ultra-low propagation delay-making it optimal for oscillator circuits and mixed-voltage signal conditioning where noise immunity and timing precision are critical.

Availability

74AHCU04S14-13 is available at Aetrix Electronics and suitable for crystal oscillator design, 3.3V/5V voltage translation, and industrial control signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for 74AHCU04S14-13 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 components for industrial, computing, and consumer applications.

The 74AHCU04 belongs to Diodes' advanced high-speed CMOS logic family, designed specifically for robust mixed-voltage system interfacing and timing-critical applications like crystal oscillators and noise-prone control signal paths.

FAQ

What is the maximum operating temperature for 74AHCU04S14-13?

The 74AHCU04S14-13 is rated for continuous operation from –40°C to +125°C ambient temperature. Its junction temperature can reach +150°C under specified power dissipation limits, making it suitable for under-hood automotive modules and industrial motor controls where thermal margins are tight.

Can 74AHCU04S14-13 drive a 50pF load reliably at 5V?

Yes - at V_CC = 5V and C_L = 50pF, the typical propagation delay remains 3.5ns with a maximum of 7.0ns across temperature. The ±8mA output drive ensures clean edges into this load, and the unbuffered architecture avoids added delay stages that degrade timing predictability.

Is 74AHCU04S14-13 pin-compatible with older 74HC04 variants?

Yes - the SO-14 pinout matches industry-standard 74-series logic: pins 1–13 follow identical A/Y assignments, with GND at pin 7 and V_CC at pin 14. However, unlike buffered 74HC04, the 74AHCU04's unbuffered design yields faster response and lower input capacitance, requiring layout verification for oscillator stability.

Does 74AHCU04S14-13 require external pull-up resistors on unused inputs?

No - unused inputs must be tied directly to V_CC or GND per the datasheet recommendation. Pull-up/pull-down resistors are unnecessary and may introduce leakage or noise coupling; direct connection ensures defined logic state and prevents floating inputs from triggering unintended oscillation or increased ICC.