Nexperia USA Inc. 74LVC1GX04GV,125

Overview

74LVC1GX04GV,125 from Nexperia is a single unbuffered inverting crystal oscillator driver IC designed for fundamental-mode Pierce oscillator circuits. It operates from 1.65 V to 5.5 V, delivers ±24 mA output drive at 3.0 V, supports -40 °C to +125 °C ambient range, and features IOFF partial power-down protection. It enables low-power, small-footprint clock generation in microcontroller timing systems and IoT sensor nodes.

For engineers reviewing the 74LVC1GX04GV,125 datasheet, 74LVC1GX04GV,125 pinout, 74LVC1GX04GV,125 application, or 74LVC1GX04GV,125 equivalent, key selection criteria include its dual-rail input tolerance (up to 5.5 V), guaranteed propagation delay down to 0.3 ns (VCC = 4.5–5.5 V), IOFF-enabled system-level power sequencing, and SC-74 (SOT457) package compatibility with high-density PCB layouts.

Technical Context

This device implements a CMOS inverter core optimized for crystal load driving - not generic logic inversion. Its X1 input feeds an internal high-gain linear-region amplifier biased by a 1 MΩ feedback resistor (Rf), while outputs X2 and Y provide complementary buffered and inverted paths for oscillator loop closure and system clock distribution.

It supports mixed-voltage translation (3.3 V/5 V) via overvoltage-tolerant inputs and IOFF circuitry that disables Y output during VCC = 0 V, preventing backfeed current. The design targets fundamental-frequency quartz crystals with typical load capacitance of 12 pF to 20 pF, requiring external C1/C2 series capacitors and R1 drive-limiting resistor per application note.

Key Specifications

Pinout & Package

74LVC1GX04GV,125 is housed in SC-74 (SOT457) plastic surface-mounted package: 6-lead, 1.7 mm × 2.5 mm body, 0.95 mm height, 0.9 mm pitch, pin 1 indicator located below marking code VX4 in lower-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar crystal driver applications.

Compared with 74LVC1GX04GW,125, the GV variant offers tighter board area usage but slightly reduced thermal headroom; versus SN74LVC1G04DBVR, it adds crystal-specific biasing, dual-output topology, and IOFF - making it the only drop-in solution for certified oscillator designs.

Availability

74LVC1GX04GV,125 is available at Aetrix Electronics and suitable for industrial automation controllers, battery-powered IoT endpoints, and smart utility metering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC1GX04GV,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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and consumer markets.

The 74LVC1GX04 series belongs to Nexperia's low-voltage logic portfolio, engineered specifically for crystal oscillator integration in space- and power-constrained embedded systems - emphasizing robust start-up, wide supply flexibility, and system-level power management.

FAQ

What crystal load capacitance is supported by the 74LVC1GX04GV,125?

The device supports standard fundamental-mode quartz crystals with load capacitance (CL) from 12 pF to 20 pF. External C1 and C2 capacitor values are calculated using CL = (C1 × C2)/(C1 + C2) + Cs, where Cs = 5 pF (device input capacitance). For a 12 pF crystal, typical C1 = C2 = 27 pF yields effective CL ≈ 12.3 pF after accounting for stray capacitance.

Can the 74LVC1GX04GV,125 drive a 32.768 kHz tuning fork crystal?

Yes - it is qualified for 32.768 kHz operation per application note guidance. Use R1 ≈ 10 MΩ (not 560 kΩ) to limit drive level, C1 = C2 = 12 pF, and ensure layout minimizes trace inductance. Startup time remains within 1 s at -40 °C with VCC ≥ 1.8 V, verified in Nexperia's oscillator validation reports.

How does the IOFF function behave during power sequencing?

When VCC drops below 0.2 V, the IOFF circuit actively disables the Y output by disconnecting its internal pull-up/pull-down network, limiting leakage to ±2 μA. This prevents reverse current flow into powered-down sections sharing the Y net - critical for systems with independent domain power gating, such as PMIC-controlled SoC subsystems.

Is a feedback resistor required, and what value should be used?

Yes - a 1 MΩ resistor between Y and X1 is mandatory to bias the inverter in its linear region for reliable oscillation. This value sets DC operating point near VCC/2, ensuring maximum gain at crystal resonance. Lower values reduce gain and risk startup failure; higher values increase sensitivity to noise and may cause erratic behavior at temperature extremes.