STMicroelectronics 74V2G125STR

Overview

74V2G125STR from STMicroelectronics is a dual 3-state bus buffer IC designed for voltage-level translation and bidirectional data isolation in mixed-voltage systems. It features 3.8 ns typical propagation delay at 5V, ±8 mA symmetrical output drive, 2V–5.5V operating range, and input tolerance up to 7V independent of VCC-enabling robust interfacing between 5V and 3V logic domains in portable battery-powered equipment.

For engineers reviewing the 74V2G125STR datasheet, 74V2G125STR pinout, 74V2G125STR application, or 74V2G125STR equivalent, key selection criteria include its power-down protected I/Os, high noise immunity (28% VCC), sub-10 ns AC timing across voltage ranges, and SOT23-8L package compatibility with space-constrained PCB layouts.

Technical Context

This device implements two independent non-inverting buffers, each with an active-low 3-state enable (nG) controlling output impedance. All inputs and outputs tolerate 0–7V regardless of VCC, enabling hot-swap and power-down protection without external clamping diodes.

Its C2MOS process delivers latch-up immunity per JEDEC JESD78, 1 µA max ICC at 25°C, and ESD protection exceeding 2 kV HBM on all pins-critical for portable electronics where supply sequencing and transient resilience are design constraints.

Key Specifications

Pinout & Package

SOT23-8L (8-pin small outline transistor package), 3.0 × 2.8 mm body, 0.65 mm pitch, tape-and-reel packaging per order code 74V2G125STR.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 3-state buffer applications.

Compared with SN74LVC2G125DBVR and 74AUP2G125GW,125, the 74V2G125STR uniquely supports 5V system integration with 7V-tolerant I/O and zero-VCC safe operation-making it irreplaceable in mixed-rail portable designs requiring hot-plug resilience and industrial temperature range.

Availability

74V2G125STR is available at Aetrix Electronics and suitable for personal digital assistants, digital camcorders, portable medical monitors, and industrial handheld scanners requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74V2G125STR 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, delivering silicon solutions for automotive, industrial, and consumer markets with emphasis on reliability, power efficiency, and system integration.

The 74V series targets high-speed, low-power CMOS logic for portable and battery-operated applications-designed specifically to replace older 74HC/74ACT families while adding voltage tolerance, ESD hardening, and extended thermal performance.

FAQ

Can the 74V2G125STR operate with VCC = 0V applied?

Yes. The device features power-down protection: all inputs and outputs remain high-impedance and tolerate 0–7V signals even when VCC = 0V. This prevents back-powering, latch-up, or damage during hot-swap or partial power-down sequences-verified per absolute maximum ratings and functional test conditions in the ST datasheet.

What is the maximum capacitive load this buffer can drive while maintaining specified timing?

The AC specifications guarantee tPLH/tPHL ≤ 7.5 ns at VCC = 3.3V with CL = 15 pF, and ≤ 8.5 ns with CL = 50 pF. For reliable operation beyond 50 pF, derate propagation delay linearly and verify setup/hold margins in-system; output drive remains stable up to ±25 mA per pin per DC specs.

Does the 74V2G125STR require external pull-up or pull-down resistors on its enable inputs?

No. The 1G and 2G inputs have CMOS-compatible thresholds (VIH = 0.7VCC, VIL = 0.3VCC) and <1 µA leakage, so they may be driven directly from compatible logic outputs. External resistors are unnecessary unless floating-state prevention is required in unpowered states-though internal protection eliminates risk of damage.

Is the SOT23-8L package RoHS-compliant and lead-free?

Yes. STMicroelectronics certifies the 74V2G125STR in SOT23-8L as RoHS-compliant and lead-free per EU Directive 2011/65/EU, with matte tin (Sn) termination and halogen-free molding compound-confirmed in ST's official material declaration and packaging specification documents.