STMicroelectronics 74V1G05STR

Overview

74V1G05STR from STMicroelectronics is a single high-speed CMOS inverter with open-drain output, designed for level-shifting and wired-OR logic interfaces. It operates from 2V to 5.5V, delivers 3.7ns typical propagation delay at 5V, supports input voltages up to 7V independent of VCC, and features 1µA max quiescent current at 25°C - used in I²C bus pull-up, mixed-voltage GPIO interfacing, and power-aware sensor nodes.

For engineers reviewing the 74V1G05STR datasheet, 74V1G05STR pinout, 74V1G05STR application, or 74V1G05STR equivalent, key selection criteria include open-drain drive capability (8mA sink at 4.5V), input overvoltage tolerance (0–7V), latch-up immunity, and SOT23-5L package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a three-stage buffered inverter architecture with internal clamping diodes and power-down protection, enabling robust operation during supply sequencing or partial power-down. Its open-drain output allows bidirectional signal translation between 3.3V and 5V domains without external level-shifters.

The input accepts voltages from –0.5V to +7.0V regardless of VCC, and the output stage is rated for ±25mA DC current with guaranteed VOL ≤ 0.1V at 50µA load across –55°C to +125°C.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 1.45mm height, 2.80 × 2.60 mm footprint, tape-and-reel compatible (TR).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single open-drain inverter applications.

Compared with SN74LVC1G05DBVR and NC7SZ05P5X, the 74V1G05STR uniquely combines 2V operation, 7V input tolerance, and sub-4ns speed - making it optimal for ruggedized mixed-voltage industrial interfaces where reliability trumps minimal package size.

Availability

74V1G05STR is available at Aetrix Electronics and suitable for I²C bus translation, GPIO voltage interface, and low-power sensor node output requiring stable component supply across automotive, industrial automation, and embedded IoT programs.

Supply support for 74V1G05STR 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, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

The 74V series targets high-speed, low-power logic applications in harsh environments - emphasizing robustness, wide supply range, and interoperability across voltage domains.

FAQ

Can 74V1G05STR drive an I²C bus directly?

Yes - its open-drain output and 8mA sink capability at 4.5V meet I²C standard-mode (100kHz) and fast-mode (400kHz) requirements when paired with appropriate pull-up resistors. Input overvoltage tolerance allows direct connection to 5V I²C masters without level-shifting circuitry.

What is the maximum allowable input voltage when VCC = 0V?

When VCC = 0V, the input can safely accept –0.5V to +7.0V per absolute maximum ratings. Power-down protection ensures no back-current flows into VCC, and the input remains high-impedance - enabling hot-swap and partial-power-down scenarios.

Is pin 1 (NC) required to be left floating?

Yes - pin 1 is internally unconnected and must remain unconnected on the PCB. No routing, grounding, or capacitive loading is permitted; doing so may cause unpredictable behavior or violate mechanical clearance requirements for SOT23-5L.

How does the 74V1G05STR handle noise on long PCB traces?

It provides ≥28% VCC noise immunity (VNIH/VNIL), meaning a 5V-supplied device rejects noise spikes up to ±1.4V. Combined with low input capacitance (4pF typ), this ensures reliable switching even on 10cm+ traces in motor-drive or power-converter adjacent layouts.