NXP Semiconductors 74AHC14PW/AUJ

Overview

74AHC14PW/AUJ from Nexperia is a hex inverting Schmitt trigger IC with CMOS-level inputs, 2.0 V to 5.5 V supply range, overvoltage-tolerant inputs up to 5.5 V, and TSSOP14 packaging. It provides noise-immune signal conditioning for digital interface translation and waveform shaping in mixed-voltage systems.

For engineers reviewing the 74AHC14PW/AUJ datasheet, 74AHC14PW/AUJ pinout, 74AHC14PW/AUJ application, or 74AHC14PW/AUJ equivalent, this device supports robust input signal cleanup, relaxation oscillator generation, and level-shifting between 2.0 V and 5.5 V logic domains without external biasing.

Technical Context

The 74AHC14PW/AUJ implements six independent Schmitt-trigger inverters with hysteresis (V_H = 0.5–1.6 V at V_CC = 5.5 V), enabling reliable noise rejection on slow or noisy input edges. Its input thresholds are supply-dependent: VT+ = 3.85 V and VT− = 1.65 V at V_CC = 5.5 V.

It operates across −40 °C to +125 °C, supports 25 mA output drive (±25 mA), and features latch-up immunity exceeding 100 mA per JESD78 Class II Level A. Input leakage remains ≤2.0 μA over temperature, and propagation delay is 3.2–11.0 ns (V_CC = 4.5–5.5 V, C_L = 15–50 pF).

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): plastic thin shrink small outline, 14 leads, 4.4 mm body width, 0.65 mm pitch, 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT14PW and SN74LVC14APW, the 74AHC14PW/AUJ uniquely combines 5.5 V overvoltage-tolerant inputs with CMOS threshold compatibility across 2.0–5.5 V supplies-making it optimal for robust level translation in heterogeneous voltage environments.

Availability

74AHC14PW/AUJ is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller input conditioning, relaxation oscillator generation, and level translation applications requiring stable component supply across extended temperature ranges.

Supply support for 74AHC14PW/AUJ 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 leading global semiconductor expert delivering high-performance, high-reliability logic, discrete, and MOSFET solutions with focus on efficiency and miniaturization.

The 74AHC14PW/AUJ belongs to Nexperia's AHC logic family, engineered for low-power, high-noise-immunity digital signal conditioning in industrial, computing, and communications equipment.

FAQ

What is the maximum input voltage the 74AHC14PW/AUJ can tolerate?

The 74AHC14PW/AUJ supports overvoltage-tolerant inputs up to 5.5 V regardless of V_CC level, allowing safe interfacing of 5 V signals into 3.3 V or even 2.5 V systems without external protection. This rating is absolute and applies across the full −40 °C to +125 °C operating range, as confirmed in Table 4 (Limiting Values) of the Nexperia datasheet Rev. 9.

Does the 74AHC14PW/AUJ support operation at 2.0 V supply?

Yes, the 74AHC14PW/AUJ is fully specified down to 2.0 V supply voltage, with guaranteed VIH/VIL thresholds, propagation delays (12.8 ns max at 2.0 V, CL = 15 pF), and output drive (±25 mA). Its CMOS input structure ensures correct logic interpretation across the entire 2.0–5.5 V range, making it suitable for battery-powered 2.5 V systems.

Can the 74AHC14PW/AUJ be used to build a relaxation oscillator?

Yes, the 74AHC14PW/AUJ is explicitly supported for relaxation oscillator design per Figure 10 in the datasheet. Using one inverter section with external R and C, its Schmitt-trigger hysteresis (e.g., 2.2 V at V_CC = 5.5 V) defines stable oscillation frequency - commonly deployed for LED flashers, timing clocks, or reset pulse generation without crystals.

What is the thermal performance of the TSSOP14 package in the 74AHC14PW/AUJ?

The 74AHC14PW/AUJ in TSSOP14 (SOT402-1) has a total power dissipation limit of 500 mW at Tamb = −40 °C to +125 °C, derating linearly at 7.3 mW/K above +81 °C. This allows sustained operation under typical logic loads (<1 mW static, <10 mW dynamic at 10 MHz), with junction temperature remaining within safe limits when mounted on standard 2-layer PCBs.

How does the 74AHC14PW/AUJ differ from the 74AHCT14PW variant?

The 74AHC14PW/AUJ uses CMOS-level inputs (VIH ≈ 0.7×V_CC), while the 74AHCT14PW uses TTL-level inputs (VIH = 2.0 V min). Critically, only the 74AHC14PW/AUJ offers 5.5 V overvoltage-tolerant inputs - a key differentiator for mixed-voltage translation. Both share identical TSSOP14 packaging, pinout, and output characteristics.