STMicroelectronics 74LVC14AMTR

Overview

74LVC14AMTR from STMicroelectronics is a low-voltage CMOS hex Schmitt-trigger inverter with hysteresis (typ. 700 mV), operating from 1.65 V to 3.6 V, delivering 5.0 ns max propagation delay at VCC = 3 V and ±24 mA output drive at 3.0–3.6 V. It features 5 V-tolerant inputs, power-down protection on all I/O, and is pin/function compatible with 74-series 00 logic for noise-immune signal conditioning in mixed-voltage digital interfaces.

For engineers reviewing the 74LVC14AMTR datasheet, 74LVC14AMTR pinout, 74LVC14AMTR application, or 74LVC14AMTR equivalent, key selection criteria include input hysteresis width, rail-to-rail 3.3 V output swing capability, ESD immunity (>2 kV HBM), symmetric drive strength, and guaranteed PCI bus compatibility at 24 mA load.

Technical Context

The 74LVC14AMTR implements six independent Schmitt-trigger inverters using sub-micron C2MOS technology, each with distinct positive (VT+) and negative (VT−) input thresholds-e.g., VT+ = 0.8–2.2 V and VT− = 0.3–1.8 V across VCC = 1.65–3.6 V-enabling robust noise rejection in slow or noisy signal environments. Its symmetrical output impedance ensures matched tPLH and tPHL delays (≤5.0 ns max at 3 V), critical for clockless timing integrity.

All inputs tolerate up to 5.5 V regardless of VCC, allowing direct interfacing with legacy 5 V logic without level shifters. Power-down protection clamps I/O to safe states when VCC = 0 V, preventing back-driving and latch-up (exceeding 500 mA per JESD17), while IOFF leakage remains ≤10 µA at VI/VO = 5.5 V.

Key Specifications

Pinout & Package

TSSOP-14 package (4.9 × 6.4 mm body, 0.65 mm pitch), JEDEC MO-153 compliant, with exposed pad not connected. Designed for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC14APWR and 74AHC14PW,118, the 74LVC14AMTR uniquely supports 1.65 V minimum VCC and delivers tighter hysteresis control-critical for battery-powered sensor nodes and mixed-voltage FPGA I/O banks where noise immunity and ultra-low voltage operation are non-negotiable.

Availability

74LVC14AMTR is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO conditioning, oscillator buffering, and PCI bus signal integrity applications requiring stable component supply, long-term lifecycle support, and full traceability.

Supply support for 74LVC14AMTR 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, specializing in automotive, industrial, and power management ICs with strong emphasis on reliability, longevity, and industrial-grade qualification.

The 74LVC14AMTR belongs to ST's LVC (Low-Voltage CMOS) logic family, engineered for interoperability across 1.65–3.6 V systems while maintaining backward compatibility with 5 V logic domains-targeting cost-sensitive, space-constrained embedded control and interface applications.

FAQ

Can the 74LVC14AMTR operate at 1.65 V while driving 24 mA loads?

No. At VCC = 1.65 V, the guaranteed output drive is ±4 mA per IOL/IOH specification. The ±24 mA rating applies only at VCC = 3.0–3.6 V. Operating at 1.65 V with heavy loads will cause VOL > 0.45 V and VOH < 1.2 V, violating logic thresholds for downstream receivers.

Is the 74LVC14AMTR pin-compatible with the 74LVC04A?

Yes-pin configuration and function are identical, but the 74LVC14AMTR adds Schmitt-trigger hysteresis (≈700 mV) on all inputs, whereas the 74LVC04A has standard CMOS thresholds. This makes them mechanically interchangeable but functionally distinct for noise-prone signal paths.

Does the 74LVC14AMTR require external pull-up resistors on inputs?

No. Inputs are internally protected with clamp diodes and have negligible leakage (±5 µA), so external pull-ups are unnecessary unless specific biasing is needed for undefined states. Unused inputs should be tied HIGH or LOW to prevent floating and increased ICC.

What is the maximum capacitive load the 74LVC14AMTR can drive while maintaining 5 ns tPD?

The 5.0 ns max tPD is specified at CL = 50 pF. Driving >50 pF increases propagation delay nonlinearly-e.g., at CL = 100 pF, tPD exceeds 7 ns per AC characteristics table. For loads >50 pF, add series termination or use a dedicated buffer stage.