Diodes Incorporated 74HC04S14-13

Overview

74HC04S14-13 from Diodes Incorporated is a hex inverter IC with six independent CMOS push-pull gates, operating from 2.0V to 6.0V supply, delivering 4mA output drive at 4.5V, featuring Schmitt-trigger inputs and ESD protection exceeding 2kV HBM. It is used in digital logic level translation and signal conditioning within PC motherboard I/O buffers.

For engineers reviewing the 74HC04S14-13 datasheet, 74HC04S14-13 pinout, 74HC04S14-13 application, or 74HC04S14-13 equivalent, key selection criteria include input threshold stability across voltage rails, propagation delay consistency at 4.5V/50pF load, output drive capability under 4mA sink/source, and SO-14 package compatibility with legacy PCB footprints.

Technical Context

This device implements six identical inverting logic gates with rail-to-rail CMOS output stages, each supporting true digital inversion (A → Y̅) with defined VIH/VIL thresholds across 2.0–6.0V VCC. Input hysteresis from Schmitt-trigger action ensures noise immunity on slow-rising signals.

It operates within –40°C to +125°C ambient, with propagation delay as low as 7ns (typ.) at 6.0V and 50pF load, and transition times down to 6ns (typ.). Power dissipation per gate is 22pF typical at 1MHz, enabling low-static-current operation in battery-sensitive systems.

Key Specifications

Pinout & Package

74HC04S14-13 is housed in a 14-pin SOIC (SO-14) package with 1.27mm pitch, 8.6mm × 3.9mm body, and gull-wing leads compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC04DR and MC74HC04ADTR2G, the 74HC04S14-13 offers superior noise immunity via Schmitt-trigger inputs and higher ESD robustness-critical for field-deployed equipment-while maintaining identical SO-14 footprint and logic behavior.

Availability

74HC04S14-13 is available at Aetrix Electronics and suitable for PC motherboard design, industrial PLC I/O modules, and consumer set-top box production requiring stable component supply and long-term manufacturability.

Supply support for 74HC04S14-13 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.

The 74HC04 belongs to Diodes' broad HC logic family, engineered for drop-in replacement of legacy 74-series devices while delivering improved noise immunity, wider supply range, and enhanced ESD robustness for modern industrial and computing platforms.

FAQ

What is the maximum operating temperature for 74HC04S14-13?

The 74HC04S14-13 is rated for operation from –40°C to +125°C ambient temperature, with junction temperature up to +150°C. Thermal derating begins above +85°C ambient when power dissipation exceeds 100mW; full 4mA drive is guaranteed only up to +125°C with proper PCB copper pour.

Can unused inputs be left floating?

No. Unused inputs must be tied to VCC or GND to prevent undefined logic states, increased ICC, and potential oscillation. The datasheet explicitly requires this per Note 6; floating inputs may cause excessive current draw (>100μA) and erratic output behavior due to internal bias instability.

Is 74HC04S14-13 pin-compatible with older 74LS04 devices?

No. While both are hex inverters, 74HC04S14-13 uses CMOS input thresholds (VIH ≈ 3.15V at 4.5V VCC) and higher output drive, whereas 74LS04 uses TTL thresholds (VIH ≈ 2.0V) and lower drive. Direct replacement may cause logic misreads or insufficient fanout without level-shifting.

Does this device support 3.3V-only operation?

Yes. The 74HC04S14-13 operates reliably at 3.3V VCC, with VIH = 2.31V (min), VIL = 1.09V (max), VOH = 3.22V (min at IOL = 4mA), and VOL = 0.33V (max). It meets all AC/DC specifications across the full 2.0–6.0V range, making it ideal for mixed-voltage 3.3V system designs.