Nexperia USA Inc. 74AHC14BQ,115

Overview

74AHC14BQ,115 from Nexperia is a hex inverting Schmitt trigger IC with CMOS-level inputs, 2.0–5.5 V supply range, overvoltage-tolerant inputs up to 5.5 V, and guaranteed operation from –40 °C to +125 °C in DHVQFN14 (SOT762-1) package. It provides noise-immune signal conditioning for digital interface translation, oscillator circuits, and debounced switch inputs in industrial control and sensor interface systems.

For engineers reviewing the 74AHC14BQ,115 datasheet, 74AHC14BQ,115 pinout, 74AHC14BQ,115 application, or 74AHC14BQ,115 equivalent, this device delivers precise hysteresis thresholds (VT+ = 3.85 V, VT− = 1.65 V at VCC = 5.5 V), balanced propagation delays (tpd ≤ 11.0 ns @ CL = 50 pF, VCC = 5.5 V), and low ICC (≤ 40 μA) - critical for mixed-voltage logic interfacing and low-power edge detection.

Technical Context

The 74AHC14BQ,115 implements six independent Schmitt-trigger inverters with hysteresis defined by VT+ and VT− thresholds that scale with VCC. Its input structure tolerates voltages up to 5.5 V regardless of supply level, enabling robust level-shifting between 3.3 V and 5 V domains without external components.

Each inverter exhibits matched tPLH/tPHL propagation delays (≤ 11.0 ns max at VCC = 5.5 V, CL = 50 pF), low input capacitance (CI ≤ 10 pF), and output drive capability of ±8 mA, supporting direct connection to standard CMOS loads while maintaining signal integrity in noisy environments.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 mm × 3.0 mm × 0.85 mm body, 14-terminal leadless construction with exposed thermal pad (non-soldered by default), optimized for space-constrained PCBs and improved thermal performance over SO14/TSSOP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT14BQ,115 and SN74LVC14APWR, the 74AHC14BQ,115 uniquely combines wide supply flexibility, true overvoltage input tolerance, and scalable hysteresis - making it the only choice for robust mixed-voltage signal conditioning in harsh industrial environments.

Availability

74AHC14BQ,115 is available at Aetrix Electronics and suitable for industrial automation, sensor interface modules, and embedded timing circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC14BQ,115 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and discrete components with focus on reliability, efficiency, and miniaturization for industrial and automotive markets.

The 74AHC14BQ,115 belongs to Nexperia's AHC logic family, engineered for low-power, high-noise-immunity digital interfacing in space- and thermally constrained applications where signal integrity and voltage translation are critical.

FAQ

Can the 74AHC14BQ,115 be used with a 2.0 V supply while accepting 5.0 V input signals?

Yes. The device features overvoltage-tolerant inputs rated to 5.5 V regardless of VCC level. At VCC = 2.0 V, inputs remain functional and protected up to 5.0 V, enabling safe level translation from higher-voltage peripherals without external clamping diodes or resistors.

What is the recommended PCB layout for the thermal pad on the DHVQFN14 package?

The exposed thermal pad (terminal 7) has no electrical function and requires no solder connection. If soldered, it must remain electrically floating or tied to GND. For optimal thermal performance, use a 2×2 array of thermal vias (0.3 mm diameter, 0.8 mm pitch) connecting the pad to an internal ground plane.

How does hysteresis improve performance in switch debouncing applications?

Hysteresis creates distinct VT+ (3.85 V) and VT− (1.65 V) thresholds at VCC = 5.5 V, preventing multiple toggles during slow or noisy transitions. This eliminates false triggering from contact bounce, reducing or eliminating the need for software debouncing routines and improving system responsiveness.

Is the 74AHC14BQ,115 qualified for automotive applications?

No. While rated for –40 °C to +125 °C, the 74AHC14BQ,115 is not AEC-Q100 qualified and lacks automotive-specific testing (e.g., HTOL, ESD per ISO 10605). It is intended for industrial, computing, and consumer applications - not safety-critical automotive subsystems.