NXP Semiconductors 74HCT3G06GD,125

Overview

74HCT3G06GD,125 from Nexperia is a triple inverter IC with open-drain outputs, designed for level-shifting and wired-AND logic interfacing in mixed-voltage systems. It operates from 4.5 V to 5.5 V, accepts TTL-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V), delivers <0.33 V low-level output at 4.0 mA, and supports operation from –40 °C to +125 °C in automotive-grade VSSOP8 packaging.

For engineers reviewing the 74HCT3G06GD,125 datasheet, 74HCT3G06GD,125 pinout, 74HCT3G06GD,125 application, or 74HCT3G06GD,125 equivalent, key selection criteria include open-drain drive capability, TTL-compatible input thresholds, guaranteed propagation delay (tPLZ/tPZL ≤ 32 ns at VCC = 4.5 V), and industrial/automotive temperature range compliance.

Technical Context

This device implements three independent inverting buffers, each with an open-drain output stage enabling bidirectional bus pull-up configuration and I²C-compatible signaling. Input clamp diodes allow safe interface to voltages exceeding VCC when used with external current-limiting resistors.

Its TTL-input compatibility ensures direct connection to legacy 5 V logic families without level translation, while the open-drain architecture supports mixed-supply domain interfacing-e.g., driving a 3.3 V bus from a 5 V controller-by selecting appropriate external pull-up voltage and resistor value.

Key Specifications

Pinout & Package

VSSOP8 plastic very thin shrink small outline package (SOT765-1); 8-pin, 2.3 mm body width, 0.5 mm pitch; pin 1 indicator located below marking code at lower-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple inverter applications.

Compared with 74HCT3G06GD,125, the 74HCT06PW,118 offers higher integration but sacrifices footprint efficiency, while the SN74LVC3G06DCUR trades automotive qualification and TTL compatibility for lower voltage operation and reduced static current-making it unsuitable for legacy 5 V control buses.

Availability

74HCT3G06GD,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, I²C bus voltage translation, and legacy TTL logic interface requiring stable component supply across extended temperature ranges.

Supply support for 74HCT3G06GD,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 leading global semiconductor expert delivering high-performance, reliable components for automotive, industrial, and consumer applications, with core strengths in logic, analog, and discrete devices.

The 74HCT3G06GD,125 belongs to Nexperia's 74HCT logic family-designed specifically for TTL-compatible interfacing in 5 V systems requiring robust noise immunity, wide temperature operation, and open-drain flexibility.

FAQ

Can 74HCT3G06GD,125 drive a 12 V pull-up resistor?

Yes-the open-drain outputs tolerate up to 7.0 V absolute maximum output voltage, and input clamp diodes allow safe interface to voltages exceeding VCC when used with series current-limiting resistors. For 12 V pull-ups, a 10 kΩ resistor limits input clamp current to <1.2 mA, staying within the ±20 mA rating.

Is this device suitable for I²C bus arbitration?

Yes-its open-drain outputs, guaranteed VOL ≤ 0.33 V at 4.0 mA, and propagation delays ≤ 32 ns meet I²C Standard-mode timing requirements. The –40 °C to +125 °C rating supports deployment in automotive I²C nodes such as door modules and seat controllers.

What is the difference between 74HCT3G06GD,125 and 74HC3G06GD,125?

The 74HCT variant uses TTL-compatible input thresholds (VIH ≥ 2.0 V), while the 74HC version uses CMOS thresholds (VIH ≥ 3.15 V at VCC = 4.5 V). This makes the HCT version interoperable with legacy 5 V TTL logic without level shifters, whereas HC requires matching CMOS voltage levels.

Does this IC require external pull-up resistors on all outputs?

Yes-open-drain outputs cannot source current; each output must be pulled up externally to define the HIGH logic state. Typical values range from 1 kΩ (for speed-critical 5 V buses) to 10 kΩ (for low-power 3.3 V I²C), selected based on rise time, bus capacitance, and sink current capability.