STMicroelectronics 74V2G05STR

Overview

74V2G05STR from STMicroelectronics is a triple inverting buffer with open-drain outputs, designed for level-shifting and wired-OR logic interfacing between 5V and 3V systems. It operates from 2V to 5.5V, delivers 3.7ns typical propagation delay at 5V, draws ≤1µA quiescent current, and accepts input voltages up to 7V independent of VCC - enabling robust voltage translation in mixed-supply digital subsystems.

For engineers reviewing the 74V2G05STR datasheet, 74V2G05STR pinout, 74V2G05STR application, or 74V2G05STR equivalent, key selection considerations include its open-drain output architecture, ±25mA output drive capability, high noise immunity (28% VCC), power-down protected inputs, and SOT23-8L package compatibility with space-constrained PCB layouts.

Technical Context

This device implements three independent CMOS inverters with open-drain outputs, fabricated using sub-micron C2MOS technology. Each inverter features buffered output stages for stable switching and enhanced noise rejection, and all inputs tolerate 0–7V regardless of VCC - supporting hot-swap and bus arbitration functions without external clamping.

The logic function is strictly inverting with high-impedance (Z) output state when inactive; output pull-up is external. Propagation delays are asymmetric (tPZL ≠ tPLZ), with tPLZ as low as 4.7ns at 5V/50pF, confirming optimized rise-time performance for wired-OR bus driving.

Key Specifications

Pinout & Package

SOT23-8L (8-pin small outline transistor package), 2.80 × 2.60 mm body, 0.65 mm pitch, tape-and-reel packaging (TR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G05DBVR and NC7SZ05P5X, the 74V2G05STR uniquely supports 0–7V inputs across its full 2–5.5V supply range and integrates three channels in SOT23-8L - making it the sole option for robust, space-efficient 5V↔3V bus translation without external protection components.

Availability

74V2G05STR is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive module communication links, and embedded system level-shifting applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74V2G05STR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The 74V series targets high-speed, low-power logic interfacing in mixed-voltage systems - emphasizing robustness, wide supply flexibility, and compatibility with legacy and next-generation digital architectures.

FAQ

Can 74V2G05STR be used as a direct replacement for 74LVC2G05 in 3.3V-only designs?

No - while both are triple open-drain inverters, the 74V2G05STR has higher input threshold voltages (0.7VCC VIH) and lacks 1.8V operation. Its 7V input tolerance and 2–5.5V VCC range make it over-specified for pure 3.3V use, and its SOT23-8L footprint differs from the SOT23-6 of 74LVC2G05, preventing drop-in replacement.

What external pull-up resistor value is recommended for 74V2G05STR outputs driving an I²C bus at 400kHz?

For 400kHz Fast Mode I²C, a 2.2kΩ pull-up to 3.3V is recommended. This ensures VOL ≤ 0.4V with 3mA sink current while meeting rise-time requirements (≤300ns). At 5V, use 4.7kΩ to limit current to <2mA per output, staying within the ±25mA absolute maximum rating.

Does 74V2G05STR require decoupling capacitors, and if so, what value and placement?

Yes - a 100nF X7R ceramic capacitor must be placed between VCC (pin 8) and GND (pin 4), with trace length <5mm. This suppresses switching noise from internal logic transitions and prevents supply droop during simultaneous output sinking, especially critical at >10MHz toggle rates.

Is 74V2G05STR suitable for driving LEDs directly, and what current-limiting configuration is required?

Yes - each open-drain output can sink up to 25mA. To drive an LED, connect anode to VCC (or higher rail), cathode to output pin, and place a series resistor calculated as R = (VCC − VF_LED)/20mA. For a 2V red LED at 5V, R = 150Ω. Do not exceed 25mA per output or 50mA total device current (ICC/IGND).