STMicroelectronics 74LVC14ATTR

Overview

74LVC14ATTR 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 24 mA output drive at 3 V, 5.0 ns max propagation delay, and 5 V-tolerant inputs for mixed-voltage interfacing in 3.3/5 V systems.

For engineers reviewing the 74LVC14ATTR datasheet, 74LVC14ATTR pinout, 74LVC14ATTR application, or 74LVC14ATTR equivalent, key selection criteria include input hysteresis for noise immunity, symmetrical 24 mA drive capability, TSSOP-14 package compatibility, and guaranteed PCI bus levels at 24 mA.

Technical Context

The device implements six independent Schmitt-trigger inverters with threshold asymmetry (VT+ ≈ 0.8–2.2 V, VT− ≈ 0.3–1.8 V) enabling robust noise rejection in noisy digital environments. Its sub-micron C2MOS process ensures low dynamic power consumption and fast switching across the full 1.65–3.6 V supply range.

Input protection includes ESD immunity >2000 V HBM and power-down protection on all I/Os. Output impedance is symmetrical (|IOH| = IOL ≥ 24 mA at VCC = 3.0–3.6 V), supporting balanced rise/fall times and minimized skew (tOSLH/tOSHL ≤ 1 ns).

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 1.2 mm 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 SN74LVC14APWR and 74AHC14PW,118, the 74LVC14ATTR offers superior 5 V input tolerance and lowest propagation delay in the 3.0–3.6 V range, making it optimal for mixed-voltage industrial interfaces where noise immunity and speed coexist.

Availability

74LVC14ATTR is available at Aetrix Electronics and suitable for industrial pushbutton interfaces, low-voltage clock conditioning, PCI bus buffering, and mixed-voltage microcontroller interfacing requiring stable component supply and long-term lifecycle support.

Supply support for 74LVC14ATTR 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, specializing in automotive, industrial, and power management solutions with broad IP and manufacturing scale.

The 74LVC family targets low-voltage, high-speed logic applications in portable, industrial, and communications equipment where power efficiency, noise immunity, and mixed-voltage interoperability are essential.

FAQ

Can 74LVC14ATTR operate reliably at 1.65 V supply?

Yes. The device is fully specified down to 1.65 V, with guaranteed hysteresis (≥0.3 V), propagation delay (≤14 ns), and output drive (≥4 mA) across –55 °C to +125 °C. Input thresholds scale with VCC, maintaining functional Schmitt behavior even at minimum voltage.

Is the TSSOP-14 package of 74LVC14ATTR compatible with standard reflow profiles?

Yes. The RoHS-compliant TSSOP-14 package supports JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C for 10 seconds. Thermal pad is not present; standard stencil aperture and 0.2 mm paste thickness ensure reliable solder joint formation.

Does 74LVC14ATTR support hot insertion when VCC is unpowered?

Yes. Power-down protection on all inputs and outputs prevents current backflow and latch-up when VCC = 0 V, satisfying IEC 61000-4-2 and MIL-STD-883 requirements for hot-swap capable systems such as modular I/O racks and field-replaceable units.

How does hysteresis improve performance in noisy environments?

Hysteresis (typically 700 mV) creates distinct high-to-low and low-to-high switching thresholds, preventing multiple toggles caused by slow-rising edges or noise spikes near the logic threshold. This eliminates false triggering in motor control feedback, switch monitoring, and long-trace signal routing.