Diodes Incorporated 74AHC14S14-13

Overview

74AHC14S14-13 from Diodes Incorporated is a hex inverter IC with Schmitt-trigger inputs, designed for noise-immune signal conditioning in mixed-voltage digital systems. It provides six independent inverters, operates from 2.0V to 5.5V, features 1V typical hysteresis, 8mA output drive at 4.5V, and 5.5V-tolerant inputs-enabling voltage translation between 3.3V and 5V logic domains in interface circuits.

For engineers reviewing the 74AHC14S14-13 datasheet, 74AHC14S14-13 pinout, 74AHC14S14-13 application, or 74AHC14S14-13 equivalent, key selection criteria include input hysteresis width (0.25–1.6V), propagation delay (3.2–16.0 ns), supply voltage flexibility, ESD robustness (2kV HBM), and SO-14 package compatibility with legacy 74-series layouts.

Technical Context

The 74AHC14S14-13 implements six identical CMOS inverter stages, each with asymmetric Schmitt-trigger thresholds (e.g., VT+ = 3.15V / VT− = 1.35V at VCC = 4.5V), enabling reliable squaring of slow-rising or noisy signals such as reset lines, mechanical switch debouncing, or clock clean-up. Its rail-to-rail input tolerance allows direct interfacing with both 3.3V and 5V sources without level shifters.

It uses standard push-pull outputs with symmetrical ±8mA drive capability at 4.5V, supports operation from −40°C to +125°C, and exhibits low dynamic power consumption (13pF typical Cpd per gate at 5V). The device complies with JESD 78 Class II latch-up immunity (>250mA) and exceeds JEDEC ESD standards across HBM, CDM, and MM test models.

Key Specifications

Pinout & Package

74AHC14S14-13 is packaged in a 14-pin SOIC (SO-14) with 1.27mm pitch, compliant with JEDEC MS-012 and RoHS/lead-free standards. Pin 1 is marked by a notch or dot; pin 7 is GND and pin 14 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHC14DR and 74LVC14AD,118, the 74AHC14S14-13 offers broader hysteresis tolerance across voltage and temperature, superior ESD robustness (2kV HBM), and optimized drive strength for 3.3V/5V mixed-signal interfaces-making it preferred for industrial and automotive signal conditioning where noise immunity is critical.

Availability

74AHC14S14-13 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and consumer audio/video equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for 74AHC14S14-13 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with emphasis on high-reliability, energy-efficient solutions for industrial, computing, and automotive markets.

The 74AHC14 belongs to Diodes' AHC logic family-designed for low-power, high-speed CMOS operation with enhanced noise immunity and wide supply voltage tolerance for robust digital interface design.

FAQ

What is the maximum operating temperature for 74AHC14S14-13?

The 74AHC14S14-13 is rated for operation from −40°C to +125°C ambient temperature, with junction temperature limits up to +150°C. This rating is validated per the Recommended Operating Conditions table in DS35342 Rev 3–2, making it suitable for under-hood automotive and industrial environments where thermal stress is significant.

Can 74AHC14S14-13 drive a 50pF load at 5MHz?

Yes: at VCC = 5.0V and CL = 50pF, the typical propagation delay is 4.2ns with a maximum of 13.5ns, and output drive remains within specification (VOL ≤ 0.55V at IOL = 8mA). Power dissipation stays well below 500mW total, confirming reliable operation at 5MHz with moderate capacitive loading.

Is unused input handling specified for this device?

Yes-per Notes 5 in the datasheet, all unused inputs must be tied to either VCC or GND to prevent floating nodes, which could cause excessive ICC, unpredictable logic states, or localized heating. Leaving inputs unconnected violates recommended operating conditions and may compromise device reliability.

Does 74AHC14S14-13 support 1.8V operation?

No: the absolute minimum supply voltage is 2.0V per the Recommended Operating Conditions table. At 1.8V, the device falls outside its specified operating range-threshold voltages become undefined, hysteresis collapses, and output drive degrades. For 1.8V systems, consider the 74LVC14 series instead.