Diodes Incorporated 74AHC1G14QW5-7

Overview

74AHC1G14QW5-7 from Diodes Incorporated is an automotive-grade single Schmitt-trigger inverter gate in SOT25 package, performing A → Y = A̅ logic with hysteresis input threshold (VT+ = 3.15 V, VT− = 1.35 V at VCC = 4.5 V), ±8 mA output drive at 4.5 V, and operation across 2.0 V to 5.5 V supply. It enables robust signal conditioning in noisy automotive sensor interfaces.

For engineers reviewing the 74AHC1G14QW5-7 datasheet, 74AHC1G14QW5-7 pinout, 74AHC1G14QW5-7 application, or 74AHC1G14QW5-7 equivalent, this part supports AEC-Q100 Grade 1 (−40°C to +125°C) designs requiring noise-immune digital inversion, rail-to-rail input tolerance, and balanced propagation delays (tPD = 3.2 ns typ @ 5 V, CL = 15 pF).

Technical Context

This device implements a single-channel Schmitt-trigger inverter using advanced CMOS process technology, delivering hysteresis of 0.4–1.4 V across 3–5.5 V supply range to reject slow-rising or noisy input edges. Its input voltage range extends beyond VCC (−0.5 V to 6.5 V), enabling level-shifting compatibility between mixed-supply domains.

The push-pull output stage provides symmetrical sourcing/sinking capability (±8 mA @ 4.5 V), low propagation delay (1.0–11.0 ns depending on VCC and load), and tight VOH/VOL control (VOH ≥ 3.94 V, VOL ≤ 0.36 V @ VCC = 4.5 V, IOL/IOH = 8 mA), ensuring reliable interfacing with downstream logic.

Key Specifications

Pinout & Package

SOT25 (3.0 mm × 2.8 mm × 1.2 mm, 0.95 mm lead pitch) surface-mount package with exposed pad not connected; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G14DBVR and MC74VHC1G14DTT1G, the 74AHC1G14QW5-7 uniquely combines AEC-Q100 Grade 1 qualification, ±8 mA drive, and 0.4 V minimum hysteresis in SOT25 - making it the only option qualified for safety-critical automotive signal conditioning with minimal external components.

Availability

74AHC1G14QW5-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and body electronics modules requiring stable component supply across extended temperature ranges and rigorous quality traceability.

Supply support for 74AHC1G14QW5-7 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 integrated circuits, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The 74AHC logic family targets high-speed, low-power, noise-immune digital interface applications - specifically engineered for automotive signal conditioning, sensor interfacing, and robust control logic in harsh environments.

FAQ

Can the NC pin (Pin 5) be tied to GND or VCC?

No. Pin 5 is internally unconnected and must remain electrically floating. Connecting it to any potential risks internal leakage paths, unpredictable behavior, or violation of AEC-Q100 qualification boundaries. The datasheet explicitly defines it as "No Connection" with no recommended external treatment.

Does the 74AHC1G14QW5-7 support 1.8 V operation?

No. The absolute minimum supply voltage is 2.0 V per the Recommended Operating Conditions table. At 1.8 V, the device fails to meet guaranteed VOH/VOL, propagation delay, or hysteresis specifications - and is outside AEC-Q100 qualification scope. Use 74LVC1G14 variants for true 1.65–1.95 V operation.

What is the maximum capacitive load this inverter can drive reliably?

The datasheet specifies switching characteristics up to 50 pF load capacitance. Driving >50 pF increases tPD nonlinearly and may cause excessive shoot-through current during transitions. For loads >50 pF, add a series resistor (e.g., 33 Ω) near the output to dampen ringing and maintain signal integrity.

Is the input hysteresis voltage fixed or supply-dependent?

Hysteresis is supply-dependent: ΔVT = VT+ − VT− scales linearly with VCC. At 3 V, ΔVT = 0.3 V min; at 4.5 V, 0.4 V min; at 5.5 V, 0.5 V min. This ensures consistent noise margin percentage (≈10–12%) across the full 2.0–5.5 V operating range.