Diodes Incorporated 74LVC1G14QSE-7

Overview

74LVC1G14QSE-7 from Diodes Incorporated is an automotive-grade single Schmitt trigger inverter IC in SOT353 package, performing positive-logic inversion with hysteresis (ΔVT = 0.71–1.11 V at 5.5 V), ±24 mA output drive at 3.3 V, 1.65–5.5 V supply range, and AEC-Q100 Grade 1 qualification (−40°C to +125°C). It enables robust signal conditioning in mixed-voltage automotive sensor interfaces.

For engineers reviewing the 74LVC1G14QSE-7 datasheet, 74LVC1G14QSE-7 pinout, 74LVC1G14QSE-7 application, or 74LVC1G14QSE-7 equivalent, key selection criteria include input hysteresis width, IOFF-enabled partial power-down capability, 5.5 V-tolerant inputs, and SOT353 thermal resistance (θJA = 385 °C/W).

Technical Context

This device implements a single-input Schmitt-trigger inverter with asymmetric input thresholds (VT+ = 2.61–3.33 V, VT− = 1.87–2.29 V at VCC = 5.5 V) and built-in IOFF circuitry that disables outputs during power-down to prevent backflow current. Its push-pull output supports rail-to-rail switching across the full 1.65–5.5 V supply range.

The logic function Y = A̅ is realized with propagation delay tPD = 0.7–6.5 ns (VCC = 1.8–5.0 V, TA = −40°C to +125°C), and input tolerance up to 5.5 V regardless of VCC enables interoperability with higher-voltage peripherals in 3.3 V or 2.5 V domains.

Key Specifications

Pinout & Package

SOT353 (2.15 mm × 2.1 mm × 1.1 mm, 0.65 mm pitch) 5-pin surface-mount package with exposed pad not present; 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 74LVC1G14GW,125, the 74LVC1G14QSE-7 uniquely combines AEC-Q100 Grade 1 qualification, SOT353's compact 2.15 mm × 2.1 mm footprint, and verified IOFF behavior for automotive power-domain isolation - making it the only drop-in option for thermally constrained, safety-compliant designs.

Availability

74LVC1G14QSE-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC input modules, and USB-C configuration detection circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC1G14QSE-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q100 standards.

The 74LVC1G14QSE-7 belongs to Diodes' automotive-qualified LVC logic family, designed specifically for robust signal conditioning in harsh-environment applications including powertrain, chassis, and body electronics.

FAQ

Can the 74LVC1G14QSE-7 operate with a 1.65 V supply and still meet its specified propagation delay?

Yes. At VCC = 1.65 V, the maximum propagation delay is 14.0 ns (TA = −40°C to +125°C), and typical delay is 4.1 ns at +25°C. The device is fully characterized down to 1.65 V, with guaranteed VOH/VOL and hysteresis performance across this minimum supply condition.

What is the purpose of the NC pin (Pin 5) on the SOT353 package?

Pin 5 is a no-connect terminal with no internal bond wire or silicon connection. It must remain unconnected on the PCB - neither grounded nor tied to VCC. Routing traces or applying solder paste to this pin may cause mechanical stress or unintended coupling due to proximity to adjacent signal pins.

Does the 74LVC1G14QSE-7 support hot insertion in live backplane systems?

Yes, via its IOFF feature: when VCC = 0 V, the output enters high-impedance state with leakage ≤ ±2 μA, preventing current flow from live backplane signals into the unpowered device. This satisfies hot-swap requirements in modular automotive ECUs and industrial I/O systems.

How does the input hysteresis of the 74LVC1G14QSE-7 improve noise immunity compared to standard inverters?

With VT+ = 2.61–3.33 V and VT− = 1.87–2.29 V at 5.5 V, the hysteresis window (ΔVT = 0.71–1.11 V) ensures that input noise spikes < 0.7 V cannot cause false toggling. This eliminates need for external RC filtering in high-EMI environments like engine bays or motor drives.