Nexperia USA Inc. 74LVC3G17DC,125

Overview

74LVC3G17DC,125 from Nexperia is a triple non-inverting Schmitt-trigger buffer IC with 5 V tolerant inputs, designed for signal conditioning in mixed-voltage digital systems. It operates from 1.65 V to 5.5 V, delivers ±24 mA output drive at 3.0 V, features IOFF partial power-down protection, and supports operation from –40 °C to +125 °C in VSSOP8 (SOT765-1) packaging. It is used in noise-prone interface translation between 3.3 V and 5 V logic domains.

For engineers reviewing the 74LVC3G17DC,125 datasheet, 74LVC3G17DC,125 pinout, 74LVC3G17DC,125 application, or 74LVC3G17DC,125 equivalent, key selection considerations include Schmitt-trigger hysteresis (min 0.40 V at 3.0 V), 5.5 V input overvoltage tolerance, IOFF-enabled backflow prevention during power sequencing, and guaranteed performance across industrial and extended temperature ranges.

Technical Context

This device integrates three independent Schmitt-trigger buffers in a single VSSOP8 package, each with asymmetric hysteresis (VT+ and VT– thresholds defined per supply voltage) to reject high-frequency noise and stabilize marginal logic transitions. Its IOFF circuit actively disables outputs when VCC = 0 V, blocking destructive current flow in partial-power-down system states.

The input structure accepts voltages up to 5.5 V regardless of VCC level (1.65–5.5 V), enabling direct interfacing with legacy 5 V TTL or CMOS outputs while driving modern low-voltage loads. Propagation delay is tightly specified - down to 1.0 ns typical at 3.0 V - and static parameters including VOL (≤0.55 V at 24 mA) and VOH (≥2.3 V at –24 mA) are guaranteed over full temperature and voltage ranges.

Key Specifications

Pinout & Package

VSSOP8 (SOT765-1) package: plastic very thin shrink small outline, 8 leads, body width 2.3 mm, lead pitch 0.5 mm, pin 1 index located below marking code in lower-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G17DCTR, the 74LVC3G17DC,125 offers tighter static current specs and superior thermal margin in VSSOP8; versus 74AUP3G17GW,125, it trades power efficiency for essential 5 V tolerance and broader supply flexibility - making it the sole viable option for legacy-compatible industrial interfaces.

Availability

74LVC3G17DC,125 is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control feedback conditioning, USB host power sequencing, and legacy bus signal shaping requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LVC3G17DC,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC3G17DC,125 belongs to Nexperia's LVC logic family - engineered for robust mixed-voltage interoperability, low dynamic power, and industrial-grade ESD/latch-up performance in space-constrained applications.

FAQ

Can the 74LVC3G17DC,125 safely interface a 5 V microcontroller GPIO to a 1.8 V FPGA input?

Yes - its inputs tolerate up to 5.5 V regardless of VCC level, so connecting a 5 V GPIO directly to any input pin (1A/2A/3A) is safe. When powered at 1.8 V, the output swing will be rail-to-rail (0–1.8 V), matching the FPGA's input threshold. No external resistors or level shifters are required.

Does the IOFF feature activate automatically when VCC drops below a threshold?

Yes - the IOFF circuit engages when VCC falls near 0 V (tested down to 0 V), disabling all three outputs regardless of input state. This occurs without external control signals and prevents back-current flow into powered-down sections, satisfying JEDEC JESD78 latch-up immunity requirements.

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

No minimum load capacitance is required - the device functions correctly with open-drain or high-impedance loads. However, for optimal noise rejection in high-EMI environments, a 10–33 pF capacitor to GND at each output reduces ringing and improves edge fidelity without affecting propagation delay beyond datasheet limits.

How does hysteresis vary with supply voltage, and is it symmetric?

Hysteresis is asymmetric and supply-dependent: at VCC = 3.0 V, VT+ = 1.30–2.40 V and VT– = 0.60–1.70 V, yielding VH = 0.40–1.40 V. The spread increases with VCC - e.g., at 5.5 V, VH reaches 0.70–1.90 V - ensuring stronger noise margin at higher rails without compromising low-VCC compatibility.