onsemi 74LVX14MTC

Overview

74LVX14MTC from onsemi is a low-voltage hex inverter IC with Schmitt-trigger inputs, designed for noise-immune signal conditioning in 3.3 V digital systems. It provides six independent inverters, each featuring 1.0 V typical hysteresis, 2.0–3.6 V supply operation, ±25 mA output drive, and 5.5 V-tolerant inputs enabling 5 V-to-3.3 V level translation in mixed-voltage interfaces.

For engineers reviewing the 74LVX14MTC datasheet, pinout, applications, or equivalent options, key selection criteria include Schmitt-trigger noise immunity, simultaneous switching noise performance, TSSOP-14 package compatibility, and guaranteed dynamic threshold behavior across −40°C to +85°C.

Technical Context

The 74LVX14MTC implements six independent CMOS inverter stages, each with internally biased Schmitt-trigger input circuitry that establishes distinct VT+ (≈2.2 V) and VT− (≈0.9 V) thresholds at VCC = 3.0 V, yielding ≈1.2 V hysteresis. This architecture rejects slow-rising/falling or noisy input signals without external components.

Its input structure tolerates up to 6.5 V DC, allowing direct connection to 5 V logic while operating from a 3.3 V supply - eliminating need for external level shifters. Propagation delay is 6.8 ns (typ) at 3.3 V/50 pF, with output skew ≤1.5 ns between gates under identical conditions.

Key Specifications

Pinout & Package

TSSOP-14 (Case 948G), 4.9 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height. Pb-free, halide-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV14APW and 74LVC14AD,118, the 74LVX14MTC offers superior hysteresis stability over temperature and supply voltage, making it optimal for harsh industrial environments where input noise profiles vary significantly.

Availability

74LVX14MTC is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O expansion, and power sequencing control requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature extremes.

Supply support for 74LVX14MTC 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications.

The LVX logic family, including the 74LVX14MTC, was engineered specifically for low-voltage, high-noise-margin digital interfacing in portable and industrial 3.3 V systems - emphasizing robustness, level translation, and Schmitt-trigger reliability.

FAQ

What is the maximum input voltage the 74LVX14MTC can safely tolerate?

The 74LVX14MTC supports DC input voltages up to 6.5 V regardless of VCC level - a key feature enabling 5 V signal interfacing while operating from a 3.3 V supply. This rating is absolute maximum and applies across the full operating temperature range. Exceeding 6.5 V risks permanent damage to input structures.

Does the 74LVX14MTC require external pull-up or pull-down resistors on unused inputs?

Yes - the 74LVX14MTC datasheet explicitly states that unused inputs must be held HIGH or LOW; floating inputs are prohibited. This prevents increased ICC, erratic output behavior, and potential device overheating due to indeterminate internal node states. A 10 kΩ resistor to VCC or GND is commonly used.

Can the 74LVX14MTC drive a 50 pF load at 3.3 V with guaranteed timing?

Yes - the 74LVX14MTC's AC Electrical Characteristics table specifies tPLH/tPHL values at CL = 50 pF and VCC = 3.3 V ±0.3 V. The maximum propagation delay is 14.1 ns under those conditions, fully characterized across −40°C to +85°C, ensuring timing predictability in loaded signal paths.

Is the 74LVX14MTC pin-compatible with standard 74HC14 or 74LS14 devices?

No - although functionally similar as hex Schmitt-trigger inverters, the 74LVX14MTC uses a TSSOP-14 package (4.9 × 4.4 mm) with 0.65 mm pitch, whereas 74HC14 and 74LS14 typically use SOIC-14 (3.9 × 8.7 mm) or PDIP-14. Pin numbering matches the industry-standard 14-pin logic layout (1–7, 8–14), but physical footprint and soldering requirements differ.

What is the typical hysteresis voltage of the 74LVX14MTC at 3.0 V supply?

At VCC = 3.0 V, the 74LVX14MTC exhibits a typical hysteresis (VH) of 1.0 V, calculated as VT+ − VT−. The datasheet specifies VT+ = 2.2 V (max) and VT− = 0.9 V (min) under those conditions, resulting in a design-meaningful 1.3 V worst-case window - critical for rejecting noise in motor control feedback or switch inputs.