Diodes Incorporated 74AHC05S14-13

Overview

74AHC05S14-13 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, and features Schmitt-trigger inputs for noise immunity-used in PC I/O expansion, peripheral interface control, and bus arbitration circuits.

For engineers reviewing the 74AHC05S14-13 datasheet, 74AHC05S14-13 pinout, 74AHC05S14-13 application, or 74AHC05S14-13 equivalent, key selection criteria include open-drain drive capability, 5.5 V-tolerant inputs, propagation delay ≤7.0 ns (V_CC = 5 V, C_L = 50 pF), CMOS power efficiency, and SO-14 package compatibility with legacy 74-series footprints.

Technical Context

This device implements six identical inverting buffers with open-drain outputs, enabling wired-AND/wired-OR bus configurations and voltage-level translation between 3.3 V and 5 V domains. Each input incorporates Schmitt-trigger hysteresis (typ. 0.3 V at V_CC = 3.3 V), improving noise rejection on slow or noisy signals.

The logic function Y = A̅ is realized with rail-to-rail input tolerance (–0.5 V to +7.0 V) and output sink capability up to 8 mA at 4.5 V, while maintaining low ICC (≤40 μA at 3.6 V) and low C_pd (5.6 pF typical at 5 V). Absolute max ratings include ±25 mA continuous output current and 2 kV HBM ESD protection.

Key Specifications

Pinout & Package

74AHC05S14-13 is housed in a 14-pin SOIC (SO-14) package with 1.27 mm pitch, 8.53–8.74 mm body length, and 3.80–3.99 mm width. Pin 1 is marked by a notch or dot; pin 7 is GND and pin 14 is V_CC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHC05DR and 74LVC05PW,118, the 74AHC05S14-13 offers superior thermal range coverage, tighter propagation delay consistency, and built-in Schmitt-triggering-making it optimal for automotive infotainment I/O expansion and industrial sensor hub designs requiring robustness against EMI and wide ambient variation.

Availability

74AHC05S14-13 is available at Aetrix Electronics and suitable for PC motherboard design, hard disk controller interface development, and TV backlight driver integration requiring stable component supply and long-term manufacturing continuity.

Supply support for 74AHC05S14-13 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 solutions for computing, industrial, and consumer markets.

The 74AHC logic family targets high-speed, low-voltage digital interface applications with enhanced noise immunity and mixed-voltage interoperability-designed specifically for next-generation embedded control and peripheral interconnect.

FAQ

Can 74AHC05S14-13 be used as a level shifter between 1.8 V and 3.3 V domains?

No. Its minimum recommended V_CC is 2.0 V, and inputs are only guaranteed functional down to V_CC – 0.5 V. For 1.8 V logic, use the 74LVC05 series instead, which supports 1.65 V operation and has compatible 5.5 V-tolerant inputs.

What is the maximum pull-up resistor value usable with its open-drain outputs?

At V_CC = 5 V and I_OL = 8 mA, the maximum R_PULLUP is 390 Ω to maintain VOL ≤ 0.55 V. For slower edges or lower current, values up to 10 kΩ are viable-but rise time increases proportionally to R × C_L, limiting maximum data rate.

Does 74AHC05S14-13 require external bypass capacitors?

Yes. A 100 nF ceramic capacitor must be placed between V_CC (pin 14) and GND (pin 7), located within 1 cm of the IC. This suppresses supply rail noise during simultaneous switching of multiple gates and prevents false triggering.

Are unused inputs on 74AHC05S14-13 required to be terminated?

Yes. Per Diodes' Recommended Operating Conditions, all unused inputs must be tied to either V_CC or GND. Floating inputs may cause excessive ICC, oscillation, or unpredictable output states due to internal capacitance coupling and Schmitt-trigger metastability.