STMicroelectronics 74LVX14MTR

Overview

74LVX14MTR from STMicroelectronics is a low-voltage CMOS hex Schmitt-trigger inverter with 5V-tolerant inputs, operating from 2V to 3.6V supply, delivering 6.8ns typical propagation delay at 3.3V, 1V typical hysteresis, and ±4mA symmetrical output drive-used in noise-immune signal conditioning for 3.3V/5V mixed-voltage interface circuits.

For engineers reviewing the 74LVX14MTR datasheet, 74LVX14MTR pinout, 74LVX14MTR application, or 74LVX14MTR equivalent, key selection criteria include input hysteresis width (1V), 5V-tolerant input voltage range (0–7V regardless of VCC), quiescent current (2µA max), dynamic noise immunity (VOLP = 0.3V typ), and SO-14 package compatibility with legacy 74-series footprints.

Technical Context

The device implements six independent Schmitt-trigger inverters using sub-micron C2MOS technology, each featuring asymmetric input thresholds (Vt+ = 2.2V, Vt− = 0.9V at VCC = 3.0V) to reject slow-rising/falling noise on data lines. Its input protection accepts 0–7V regardless of VCC, enabling safe level-shifting between 5V and 3.3V domains without external resistors.

All inputs include power-down protection and 2kV ESD immunity; outputs exhibit balanced |IOH| = |IOL| ≥ 4mA drive capability and matched tPLH ≅ tPHL propagation delays-critical for timing-critical edge detection and clock clean-up in battery-powered systems.

Key Specifications

Pinout & Package

74LVX14MTR is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, with 1.27mm pitch, 8.55–8.75mm body width, and tape-and-reel packaging (T&R) compliant with EIA-481-D.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC14APWR and MC74VHC14DT, the 74LVX14MTR uniquely combines 5V-tolerant inputs, 1V hysteresis, and 2µA max ICC-making it optimal for mixed-voltage, noise-prone, battery-sensitive designs where input robustness and standby efficiency are jointly critical.

Availability

74LVX14MTR is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical device wake-up circuits, USB host power control, and automotive body control modules requiring stable component supply across extended temperature ranges (−55°C to +125°C).

Supply support for 74LVX14MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and discrete components for industrial, automotive, and consumer markets.

The 74LVX series targets low-voltage, low-power, mixed-signal interface applications-specifically engineered to bridge 3.3V logic domains with legacy 5V systems while minimizing power and noise.

FAQ

Can 74LVX14MTR operate with VCC = 2.0V and still meet hysteresis specifications?

Yes. Per Table 6, VH = 0.3–1.2V is guaranteed across −55°C to +125°C at VCC = 2.0V–3.6V. At VCC = 2.0V, Vt+ = 1.2V min and Vt− = 0.4V max, yielding ≥0.8V hysteresis-sufficient for most noise-immune applications despite reduced margin versus 3.3V operation.

Is the 74LVX14MTR pinout compatible with standard 74HC14 or 74LS14 packages?

Yes. Pin configuration matches industry-standard 14-pin SOIC layout for hex inverters: inputs on odd pins (1,3,5,9,11,13), outputs on even pins (2,4,6,8,10,12), GND on pin 7, VCC on pin 14. Functionally identical to 74LVX00 but with Schmitt-trigger inputs instead of standard CMOS.

What is the maximum capacitive load this device can drive while maintaining tPD ≤ 12.5ns?

At VCC = 3.3V, tPD ≤ 12.5ns is guaranteed for CL ≤ 50pF (Table 8). With CL = 50pF, typical tPD = 9.3ns; exceeding 50pF increases delay nonlinearly due to output impedance interaction-designers should limit total node capacitance (including trace, probe, and load) to ≤45pF for margin.

Does 74LVX14MTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be left floating only if VCC is powered; however, STMicroelectronics recommends tying them to VCC or GND to prevent unintended oscillation and reduce ICC. The internal input protection circuitry prevents damage, but unconnected inputs increase susceptibility to EMI-induced switching and static charge accumulation.