STMicroelectronics 74V1T32STR

Overview

74V1T32STR from STMicroelectronics is a single 2-input OR gate in SOT23-5L package, operating at 4.5–5.5 V with 4.5 ns typical propagation delay, ±8 mA symmetrical output drive, and input tolerance up to 7 V independent of supply. It enables level-shifting between 5 V and 3 V systems in interface logic applications.

For engineers reviewing the 74V1T32STR datasheet, 74V1T32STR pinout, 74V1T32STR application, or 74V1T32STR equivalent, key selection criteria include input overvoltage tolerance (0–7 V), power-down input protection, symmetrical output impedance, low ICC (1 µA max), and operation across –55°C to +125°C industrial temperature range.

Technical Context

This device implements a two-stage buffered CMOS OR gate using sub-micron C2MOS technology, delivering high noise immunity and stable switching. Its input structure accepts 0–7 V regardless of VCC, enabling robust interfacing across mixed-voltage domains.

The output stage provides matched tPLH ≅ tPHL propagation delays and symmetrical |IOH| = IOL = 8 mA (min) drive capability at VCC = 4.5 V, supporting clean signal integrity in high-speed digital control paths.

Key Specifications

Pinout & Package

SOT23-5L surface-mount package: 1.6 mm × 2.9 mm footprint, 1.3 mm height, 0.95 mm lead pitch, thermally enhanced with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single 2-input OR gate applications.

Compared with SN74LVC1G32DBVR and NC7SZ32P5X, the 74V1T32STR uniquely combines 5 V operation, 7 V input tolerance, and power-down protection - making it the only choice for robust 5 V system interfaces subject to undervoltage or hot-plug events.

Availability

74V1T32STR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and 5 V ↔ 3.3 V interface bridges requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74V1T32STR 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, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The 74V series targets high-speed, high-reliability CMOS logic for mission-critical industrial and automotive applications, emphasizing latch-up immunity, wide temperature operation, and mixed-voltage interoperability.

FAQ

Can 74V1T32STR operate with VCC = 3.3 V?

No. The recommended operating VCC range is strictly 4.5 V to 5.5 V per datasheet Section "Recommended Operating Conditions". At 3.3 V, VOH drops below 2.4 V and VOL exceeds 0.55 V, violating TTL-compatible output thresholds and risking downstream logic misreads.

Does 74V1T32STR require external pull-up or pull-down resistors on inputs?

No. Inputs are internally protected with power-down circuitry and exhibit <±1 µA leakage across –0.5 V to +7.0 V. External resistors are unnecessary unless specific biasing is required for unused inputs in partial-enable configurations.

What is the maximum capacitive load CL supported at full speed?

At VCC = 5.0 V and input rise/fall time ≤3 ns, the device maintains tPLH/tPHL ≤9.0 ns (max) up to CL = 50 pF, including PCB trace and probe capacitance. Beyond 50 pF, propagation delay increases nonlinearly and output edge rate degrades.

Is 74V1T32STR pin-compatible with 74V1T00 or other 74V1Txx variants?

No. While all 74V1Txx devices use SOT23-5L, pin assignments differ: 74V1T00 (NAND) assigns Pin 1 to A, Pin 2 to B, Pin 4 to Y - same as 74V1T32 - but 74V1T02 (NOR) swaps output to Pin 2 and uses Pin 4 as B. Direct substitution requires schematic and layout verification.