Diodes Incorporated 74AHCT04S14-13

Overview

74AHCT04S14-13 from Diodes Incorporated is a hex inverter IC with six independent CMOS push-pull gates, TTL-compatible inputs, and 4.5V–5.5V supply operation. It delivers 8mA output drive at V_CC = 4.5V, features Schmitt-trigger inputs for noise immunity, and operates across –40°C to +125°C ambient. Used in PC motherboard logic buffering, peripheral interface signal inversion, and set-top box control path conditioning.

For engineers reviewing the 74AHCT04S14-13 datasheet, 74AHCT04S14-13 pinout, 74AHCT04S14-13 application, or 74AHCT04S14-13 equivalent, key selection criteria include input voltage compatibility (VIH/VIL), propagation delay (t_PD ≤ 8.5 ns @ CL=50pF), output drive capability (±8mA), Schmitt-trigger hysteresis, and SO-14 package thermal and layout constraints.

Technical Context

This device implements six identical inverting logic gates in a single monolithic CMOS structure, with each gate featuring TTL-level input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) and rail-to-rail CMOS output swing. Input hysteresis enables reliable switching in noisy environments, while the push-pull output stage supports both sourcing and sinking up to 8mA per channel.

Designed for 5V digital systems, it maintains consistent timing performance across –40°C to +125°C and exhibits low static current (ICC ≤ 40μA) and low dynamic power dissipation (Cpd = 14.8pF/gate). Its ESD robustness (2kV HBM, 1kV CDM) and latch-up immunity (>250mA) support industrial-grade reliability without external protection circuitry.

Key Specifications

Pinout & Package

74AHCT04S14-13 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. The package supports reflow soldering per JEDEC J-STD-020 and provides adequate thermal dissipation (θ_JA ≈ 120°C/W) for logic-level power densities.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT04DR and 74LVC04PW,118, the 74AHCT04S14-13 uniquely balances Schmitt-trigger noise immunity, 5V TTL compatibility, and industrial temperature range-making it optimal for legacy 5V control logic where signal integrity trumps raw speed or multi-voltage flexibility.

Availability

74AHCT04S14-13 is available at Aetrix Electronics and suitable for PC motherboard design, optical storage subsystem integration, and set-top box production requiring stable component supply and long-term manufacturability.

Supply support for 74AHCT04S14-13 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, cost-optimized components for computing, industrial, and consumer markets.

The 74AHCT logic family targets 5V digital systems needing TTL compatibility, low power, and robust ESD performance-designed specifically for legacy infrastructure upgrades and cost-sensitive embedded control applications.

FAQ

Can 74AHCT04S14-13 operate reliably at 4.5V with full 8mA output drive?

Yes. Electrical Characteristics tables confirm I_OL = 8mA and I_OH = –8mA are guaranteed at V_CC = 4.5V across –40°C to +125°C, with VOL ≤ 0.55V and VOH ≥ 3.70V under those conditions. This ensures full drive capability even at minimum supply voltage.

Is the SO-14 package of 74AHCT04S14-13 compatible with standard 1.27mm-pitch PCB footprints?

Yes. The SO-14 outline matches JEDEC MS-012, with 1.27mm lead pitch, 8.63mm body length, and 3.9mm body width. Pad layout recommendations (X = 0.60mm, Y = 1.50mm, C1 = 5.4mm, C2 = 1.27mm) align with IPC-7351B Class L standards for automated assembly.

Does 74AHCT04S14-13 require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs must be tied to either V_CC or GND per Recommended Operating Conditions (Note 5), but internal structure does not require external resistors. Direct connection prevents floating inputs that could cause excessive ICC or oscillation due to Schmitt-trigger sensitivity.

How does the Schmitt-trigger input affect timing behavior compared to standard CMOS inverters?

The Schmitt-trigger adds ~0.4V hysteresis (V_IN+ – V_IN–) to each input, eliminating chatter on slow or noisy edges-but introduces no measurable delay penalty. Propagation delay (t_PD) values in the datasheet already include this effect and remain identical to non-Schmitt variants in the same family.