Nexperia USA Inc. 74LVC3G14DC,125

Overview

74LVC3G14DC,125 from Nexperia is a triple inverting Schmitt trigger IC designed for signal conditioning in mixed-voltage digital systems. It provides three independent 1.65 V–5.5 V logic gates with 5 V tolerant inputs, ±24 mA output drive at 3.0 V, hysteresis of 0.70–1.90 V (VCC = 5.5 V), and IOFF partial power-down protection. It is used in waveform shaping for industrial sensor interfaces where slow-rising noisy signals require clean digital conversion.

For engineers reviewing the 74LVC3G14DC,125 datasheet, 74LVC3G14DC,125 pinout, 74LVC3G14DC,125 application, or 74LVC3G14DC,125 equivalent, key selection factors include input hysteresis voltage (VT+ / VT−), propagation delay (0.5–4.7 ns), 5 V tolerance in 3.3 V systems, IOFF-enabled hot-swap capability, and VSSOP8 package thermal derating (4.9 mW/K above 99 °C).

Technical Context

This device implements three independent CMOS Schmitt-trigger inverters with asymmetric input thresholds (e.g., VT+ = 2.91 V, VT− = 1.86 V at VCC = 5.5 V) to reject noise on slow-transitioning signals. Each gate features rail-to-rail output swing and supports unlimited input rise/fall times without oscillation.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current up to ±50 mA and enabling live insertion into powered backplanes. Input clamping diodes and ESD protection (HBM >2000 V, CDM >1000 V) ensure robustness in industrial environments.

Key Specifications

Pinout & Package

VSSOP8 package (SOT765-1): plastic very thin shrink small outline, 8 leads, body width 2.3 mm, lead length 0.5 mm, pin 1 index at lower-left corner below marking "V14".

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G14DCUR and 74AUP3G14GM,132, the 74LVC3G14DC,125 uniquely balances 5 V tolerance, −40 °C to +125 °C operation, and VSSOP8 thermal performance - making it optimal for industrial I/O modules requiring field-replaceable signal conditioning without redesign.

Availability

74LVC3G14DC,125 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) input conditioning, automotive body control modules, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.

Supply support for 74LVC3G14DC,125 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC logic family delivers advanced low-voltage CMOS performance with robust ESD protection and wide supply flexibility - engineered specifically for signal integrity in cost-sensitive, high-mix manufacturing environments.

FAQ

Can 74LVC3G14DC,125 operate with VCC = 1.8 V and still accept 5 V inputs?

Yes. The device is explicitly rated for 5 V tolerant inputs across its full 1.65 V–5.5 V supply range. At VCC = 1.8 V, input clamping diodes and internal protection circuitry limit VI to ≤5.5 V without damage, and logic thresholds remain functional per Table 7 (VT+ = 1.10 V typ, VT− = 0.61 V typ). This enables direct interfacing of 5 V sensors to 1.8 V microcontrollers.

What is the maximum capacitive load the outputs can drive while maintaining specified tpd?

The datasheet specifies dynamic characteristics with CL = 30 pF (VCC ≤ 2.7 V) and CL = 50 pF (VCC ≥ 3.0 V) in Table 11. Driving loads beyond 50 pF increases propagation delay nonlinearly and may cause ringing; for >50 pF, add series termination (e.g., 22 Ω) near the driver output and verify timing margins with oscilloscope measurement at the receiver.

Does IOFF function activate automatically when VCC drops below a threshold?

Yes. IOFF is an inherent circuit feature activated whenever VCC = 0 V (or floating), as confirmed in Section 1 and Table 5. Output leakage remains ≤±2 μA under these conditions. No external enable signal or biasing is required - the protection engages passively during power removal or brownout.

How does hysteresis change with supply voltage, and why does it matter for noise rejection?

Hysteresis (VH = VT+ − VT−) scales with VCC: e.g., 0.49 V at 1.8 V, 1.02 V at 5.5 V (Table 8). Higher VCC yields larger noise margin - critical in 24 V industrial environments where common-mode transients exceed 1 V. Designers must verify VH ≥ 2× expected noise amplitude at the target VCC to prevent false triggering.