Nexperia USA Inc. 74HCT14BQ-Q100,115

Overview

74HCT14BQ-Q100 from Nexperia is an automotive-qualified hex inverting Schmitt trigger IC with TTL-compatible input thresholds (VT+ = 1.2–1.9 V, VT− = 0.5–1.4 V at VCC = 4.5–5.5 V), 14-terminal DHVQFN package, −40 °C to +125 °C operating range, and propagation delay of 20–51 ns (VCC = 4.5 V, CL = 50 pF). It enables robust signal conditioning in noisy automotive sensor interfaces and relaxation oscillator circuits.

For engineers reviewing the 74HCT14BQ-Q100 datasheet, 74HCT14BQ-Q100 pinout, 74HCT14BQ-Q100 application, or 74HCT14BQ-Q100 equivalent, this page delivers verified functional identity, validated DHVQFN14 pin mapping, confirmed Schmitt-trigger hysteresis (0.4–0.6 V), automotive AEC-Q100 Grade 1 qualification, and real-world use cases in waveform shaping and monostable timing circuits.

Technical Context

This device implements six independent inverting Schmitt triggers with asymmetric input threshold voltages-positive-going (VT+) and negative-going (VT−) thresholds differ by 0.4–0.6 V hysteresis-enabling noise-immune conversion of slow-rising analog or degraded digital signals into clean, jitter-free square waves. Each gate operates with rail-to-rail output swing and supports unlimited input rise/fall times.

It features TTL-level input compatibility (VIH ≈ 2.0 V min, VIL ≈ 0.8 V max), clamp diodes on all inputs for overvoltage protection up to VCC + 0.5 V, and CMOS output drive capability (±4.0 mA at VCC = 4.5 V). The DHVQFN14 package includes side-wettable flanks for AOI-suitable solder joint inspection in automotive PCB assembly.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, 14 copper terminals, side-wettable flanks for automated optical inspection. Thermal pad (terminal 7) is electrically isolated ground pad - may be left floating or connected to GND per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC14BQ-Q100, the 74HCT14BQ-Q100 provides guaranteed TTL-level input recognition critical for legacy 5 V sensor integration, while SN74LV14AQPWRQ1 offers better performance in modern 3.3 V domains but requires careful validation of input voltage margins.

Availability

74HCT14BQ-Q100 is available at Aetrix Electronics and suitable for automotive powertrain control units, ADAS sensor signal conditioning, body electronics timing circuits, and infotainment system reset management requiring stable component supply under AEC-Q100 compliance.

Supply support for 74HCT14BQ-Q100 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 focused on essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT14 series belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for noise-prone vehicle environments where signal integrity, thermal robustness, and long-term reliability are non-negotiable.

FAQ

What is the maximum recommended operating frequency for 74HCT14BQ-Q100 in oscillator applications?

The device supports stable astable operation up to approximately 10 MHz when loaded with ≤50 pF and powered at 4.5–5.5 V, based on typical propagation delay (20–51 ns) and transition time (7–22 ns) data. Frequency stability depends on RC component tolerances and temperature drift of VT+/VT− thresholds, which track within ±0.1 V over −40 °C to +125 °C.

Can 74HCT14BQ-Q100 drive a 100 pF capacitive load reliably?

No - the datasheet specifies dynamic characteristics (tpd, tt) only for CL = 15 pF and 50 pF. Driving 100 pF exceeds rated conditions: output rise/fall times degrade significantly, propagation delay increases beyond 51 ns, and output voltage swing may fall below VOH/VOL specs. For >50 pF loads, add a buffer stage or reduce trace capacitance via layout optimization.

Is the exposed thermal pad (terminal 7) required to be soldered to ground?

No - terminal 7 is a non-electrical thermal pad. The datasheet explicitly states "no electrical or mechanical requirement to solder the pad." If soldered, it must remain electrically floating or connect to GND; connecting to any other net violates the design and risks latch-up or thermal stress.

How does the 74HCT14BQ-Q100 handle input voltages above VCC?

All six inputs include integrated clamp diodes to VCC and GND. When VI exceeds VCC + 0.5 V, current flows through the VCC clamp diode - limiting absolute max input to VCC + 0.5 V and requiring external current-limiting resistors (e.g., 1 kΩ) to keep IIK ≤ ±20 mA per pin, as specified in Absolute Maximum Ratings.