STMicroelectronics 74VHC14YTTR

Overview

74VHC14YTTR from STMicroelectronics is a high-speed CMOS hex Schmitt-trigger inverter with hysteresis, designed for noise-immune signal conditioning in digital interfaces. It operates from 2V to 5.5V, delivers 5.5ns typical propagation delay at 5V, supports ±8mA symmetrical output drive, and accepts input voltages up to 7V independent of VCC-enabling robust 5V-to-3V level translation in mixed-voltage systems.

For engineers reviewing the 74VHC14YTTR datasheet, 74VHC14YTTR pinout, 74VHC14YTTR application, or 74VHC14YTTR equivalent, key selection criteria include input hysteresis voltage (0.4–1.4V), power-down input protection, ESD immunity (2kV), low quiescent current (2µA max), and TSSOP-14 package compatibility with legacy 74-series footprints.

Technical Context

The device implements six independent Schmitt-trigger inverters using sub-micron C2MOS technology, each with three-stage buffered output architecture to ensure stable switching and high noise immunity. Its input hysteresis (V_H = 1V typ. at V_CC = 4.5V) enables reliable operation with slow-rising/falling signals, such as those from mechanical switches or long PCB traces.

All inputs feature power-down protection and tolerate 0–7V regardless of supply voltage, allowing safe interfacing across voltage domains. Outputs provide balanced sourcing/sinking capability (|I_OH| = I_OL ≥ 8mA) and exhibit low dynamic noise (V_OLP ≤ 0.8V max at CL = 50pF).

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4mm × 5.0mm body, 0.65mm pitch, 1.05mm max height, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV14APWR and 74HC14D,653, the 74VHC14YTTR uniquely combines 5.5ns speed at 5V, 7V input tolerance, and power-down safety-making it optimal for industrial I/O conditioning where voltage domain bridging and reliability are critical.

Availability

74VHC14YTTR is available at Aetrix Electronics and suitable for industrial automation, embedded sensor interfaces, and mixed-voltage communication subsystems requiring stable component supply and long-term lifecycle support.

Supply support for 74VHC14YTTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74VHC series targets high-speed, low-power logic applications requiring robust noise immunity and wide supply voltage flexibility in space-constrained industrial and computing systems.

FAQ

Can 74VHC14YTTR be used with a 3.3V supply while accepting 5V inputs?

Yes. The device supports V_CC = 3.3V and tolerates input voltages from −0.5V to +7.0V regardless of supply level. This enables safe 5V-to-3.3V level translation without external components, provided output loading remains within ±8mA limits and V_OH/V_OL meet downstream logic thresholds.

What is the minimum recommended load capacitance for stable Schmitt-trigger operation?

No minimum load capacitance is required. The 74VHC14YTTR functions correctly with open-drain or high-impedance loads. However, capacitive loads >50pF increase propagation delay and may degrade edge rate; layout parasitics should be minimized for timing-critical paths.

Does the device latch up if inputs exceed V_CC + 0.5V?

No. Input structures include dedicated protection diodes and power-down circuitry that prevent latch-up even when VI reaches +7.0V. This is confirmed by STMicroelectronics' improved latch-up immunity specification and absolute maximum rating of VI = −0.5V to +7.0V.

How does hysteresis vary with supply voltage?

Hysteresis voltage (V_H) scales with V_CC: 0.3–1.2V at 3.0V, 0.4–1.4V at 4.5V, and 0.5–1.6V at 5.5V. This ensures consistent noise margin across the full operating range without requiring external biasing or trimming.