Diodes Incorporated 74AHC05T14-13

Overview

74AHC05T14-13 from Diodes Incorporated is a hex inverter IC with six independent open-drain outputs, designed for level translation and wired-OR logic in mixed-voltage systems. It operates from 2.0 V to 5.5 V, tolerates 5.5 V inputs, sinks up to 8 mA at V_CC = 4.5 V, features Schmitt-trigger inputs, and is packaged in RoHS-compliant TSSOP-14.

For engineers reviewing the 74AHC05T14-13 datasheet, 74AHC05T14-13 pinout, 74AHC05T14-13 application, or 74AHC05T14-13 equivalent, this device serves as a voltage-tolerant logic inverter for bus interface, I²C pull-up coordination, and mixed-supply signal conditioning where open-drain drive and input hysteresis are required.

Technical Context

The 74AHC05T14-13 implements six identical CMOS inverters, each with an open-drain output stage enabling wired-AND/wired-OR configurations and bidirectional level shifting. Its Schmitt-trigger inputs provide noise immunity with typical hysteresis of 0.3 V at V_CC = 3.3 V.

All inputs tolerate up to 5.5 V regardless of V_CC, supporting interfacing between 3.3 V controllers and 5 V peripherals. Propagation delay is 3.2 ns (typ) at V_CC = 4.5 V with 15 pF load, and power dissipation per gate is 4.8 pF (typ) at 3.3 V/1 MHz.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not present, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter with open-drain applications.

Compared with SN74AHC05PW and 74LVC05PW, the 74AHC05T14-13 uniquely combines Schmitt-trigger inputs, 5.5 V input tolerance, and 8 mA sink in a single industry-standard footprint-making it optimal for robust mixed-voltage signal conditioning without added components.

Availability

74AHC05T14-13 is available at Aetrix Electronics and suitable for I²C bus design, reset signal conditioning, and wired-OR interrupt aggregation requiring stable component supply across industrial, computing, and consumer electronics programs.

Supply support for 74AHC05T14-13 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, low-power, and mixed-signal solutions for industrial, computing, and consumer markets.

The 74AHC logic family targets high-speed, low-noise, mixed-voltage digital interfacing - designed specifically for robust signal integrity in space-constrained PCB layouts with diverse supply domains.

FAQ

Can 74AHC05T14-13 be used as a direct replacement for 74HC05?

No. While both are hex inverters with open-drain outputs, the 74AHC05T14-13 uses advanced CMOS process yielding lower propagation delay (3.2 ns vs. ~8 ns), higher noise immunity (Schmitt-trigger inputs), and wider supply range (2.0–5.5 V vs. 2.0–6.0 V). Input thresholds also differ: 74AHC05 has V_IH = 3.85 V at 5.5 V supply, whereas 74HC05 specifies V_IH = 3.15 V. Direct substitution may cause timing or logic-level mismatches in marginal designs.

What pull-up resistor value should be used with its open-drain outputs?

A 4.7 kΩ pull-up to 3.3 V or 5 V is recommended for standard I²C operation (≤400 kHz), providing ~0.7 mA static current and meeting rise-time requirements for 15–50 pF bus capacitance. For faster switching or higher capacitive loads, values down to 1 kΩ may be used - verified to remain within the 8 mA sink limit at V_CC = 4.5 V and ensure VOL ≤ 0.55 V.

Does 74AHC05T14-13 require external decoupling capacitors?

Yes. A 100 nF ceramic capacitor placed within 3 mm of the V_CC (pin 14) and GND (pin 7) pins is required to suppress high-frequency supply noise generated during simultaneous output transitions. This ensures stable operation across temperature and prevents false triggering due to ground bounce, especially when driving multiple loads or operating above 10 MHz toggle rates.

Is the TSSOP-14 package of 74AHC05T14-13 compatible with SO-14 footprints?

No. The TSSOP-14 (4.9 × 4.4 mm) has 0.65 mm lead pitch and thinner profile versus SO-14 (8.7 × 3.9 mm) with 1.27 mm pitch. They are mechanically and thermally incompatible. PCB layout must match the TSSOP-14 land pattern per Diodes AP02001 - including 0.45 mm X, 1.45 mm Y solder pads and 5.9 mm C1 dimension - to ensure reliable reflow and mechanical strength.