STMicroelectronics 74V1G70STR

Overview

74V1G70STR from STMicroelectronics is a single high-speed CMOS buffer in SOT23-5L package, operating from 2V to 5.5V supply, with 3.6ns typical propagation delay at 5V, ±8mA symmetrical output drive, and input tolerance up to 7V independent of VCC-enabling robust 5V-to-3V level translation in portable logic interfaces.

For engineers reviewing the 74V1G70STR datasheet, 74V1G70STR pinout, 74V1G70STR application, or 74V1G70STR equivalent, key selection criteria include its power-down protected inputs, 28% VCC noise immunity, sub-10ns AC timing across temperature, rail-to-rail input voltage range (–0.5V to 7V), and guaranteed 1µA max ICC at 25°C for ultra-low static power in battery-sensitive designs.

Technical Context

The 74V1G70STR implements a two-stage buffered output architecture using sub-micron C2MOS technology, delivering balanced tPLH/tPHL propagation delays and symmetrical |IOH| = IOL ≥ 8mA at 4.5V. Its input stage features diode-clamped protection and accepts 0–7V regardless of VCC, enabling safe interfacing between mixed-voltage domains.

It operates over –55°C to +125°C with validated DC specs including VIH = 0.7VCC (min), VIL = 0.3VCC (max), VOH ≥ 4.4V at IO = –8mA (VCC = 4.5V), and VOL ≤ 0.55V at IO = +8mA-ensuring reliable TTL/CMOS-compatible switching across industrial temperature ranges.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 1.25mm pitch, 2.8 × 1.75 × 1.3mm body height, tape-and-reel compatible (TR). Pin 1 marked by notch or dot; Pin 3 is GND, Pin 5 is VCC, Pin 2 is input, Pin 4 is output, Pin 1 is NC (not connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G125DBVR and NC7SZ17P5X, the 74V1G70STR uniquely combines input overvoltage tolerance, power-down safety, and 28% VCC noise margin-making it the only choice for unregulated or mixed-rail edge-node interfaces requiring zero-failure robustness.

Availability

74V1G70STR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, portable medical sensor hubs, and smart energy meter communication interfaces requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74V1G70STR 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 silicon solutions for automotive, industrial, and consumer markets with emphasis on reliability, power efficiency, and functional safety.

The 74V series targets high-speed, low-power logic interface applications-specifically engineered for voltage translation, signal conditioning, and noise-immune digital interconnect in harsh environments.

FAQ

Can 74V1G70STR be used with VCC = 0V while input is active?

Yes. The device features power-down protected inputs that accept 0–7V regardless of VCC state. When VCC = 0V, the input remains functional and non-damaging, and the output is high-impedance-making it ideal for hot-swap or partial-power-down systems where inputs may be driven before supply stabilization.

What is the maximum capacitive load the 74V1G70STR can drive reliably?

The 74V1G70STR is characterized up to 50pF load capacitance with guaranteed tPLH/tPHL ≤ 9.0ns at –55°C to +125°C (VCC = 5.0V). For loads >50pF, propagation delay increases linearly; derating curves in the datasheet show +1.2ns per additional 10pF at 5V, limiting practical use to ≤80pF for sub-12ns timing budgets.

Does 74V1G70STR require external pull-up or pull-down resistors on input or output?

No. The input has built-in biasing and overvoltage protection; no external resistors are needed for DC termination. The output is push-pull and actively drives both logic states. Pull resistors are only required if specific idle-state logic levels are mandated by downstream devices-not by the 74V1G70STR itself.

How does the 28% VCC noise immunity translate to actual voltage margin at 3.3V and 5V supplies?

At VCC = 3.3V, VNIH = VNIL = 0.924V (28% of 3.3V), meaning noise spikes up to ±924mV on input lines will not cause false triggering. At VCC = 5.0V, margin expands to ±1.4V-providing immunity against common-mode transients in motor drives and industrial fieldbus nodes per IEC 61000-4-4 Level 3 (2kV EFT) test requirements.