Texas Instruments SN74LVC3G58BQAR

Overview

SN74LVC3G58 from Texas Instruments is a triple configurable multiple-function gate IC with Schmitt-trigger inputs, operating across 1.1V–3.6V supply, supporting AND/OR/NAND/NOR/XOR/inverter/buffer logic per channel, and featuring 5.5V-tolerant inputs for robust level-shifting in mixed-voltage systems.

For engineers reviewing the SN74LVC3G58 datasheet, SN74LVC3G58 pinout, SN74LVC3G58 application, or SN74LVC3G58 equivalent, this device delivers flexible logic configuration in ultra-small WQFN-14 (BQA) packaging - critical for space-constrained power sequencing, signal enable, and noise-immune digital interfacing in industrial and portable electronics.

Technical Context

The SN74LVC3G58 implements three independent 3-input configurable logic gates, each mapping A/B/C inputs to Y output via an internal truth table that supports eight selectable functions. Its Schmitt-trigger inputs provide hysteresis (ΔVT = 0.07–1.2 V, depending on VCC), enabling reliable operation with slow-rising or noisy signals without external conditioning.

All outputs are balanced CMOS push-pull drivers capable of ±24 mA at 3.0V, with propagation delays as low as 5.6 ns (CL = 50 pF, VCC = 3.3V). Input clamping diodes protect against overvoltage transients, and the device meets JESD 17 latch-up (>250 mA) and JESD 22 ESD standards (±2000 V HBM, ±1000 V CDM).

Key Specifications

Pinout & Package

SN74LVC3G58BQAR uses the BQA package: 14-pin WQFN (3 mm × 2.5 mm body, 0.5 mm pitch), with exposed thermal pad (optional GND connection). The package supports fine-pitch PCB assembly and enhanced thermal performance (RθJB = 70.9 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar configurable logic gate applications.

Compared with SN74LVC1G97DBVR and 74LVC1G57GW,125, the SN74LVC3G58BQAR uniquely combines triple-channel configurability, 5.5V input tolerance, and ultra-compact WQFN packaging - reducing component count, PCB area, and interconnect complexity in multi-signal conditioning applications.

Availability

SN74LVC3G58BQAR is available at Aetrix Electronics and suitable for power sequencing control, signal enable gating, noise-immune sensor interfacing, and multi-rail status monitoring requiring stable component supply and long-term industrial availability.

Supply support for SN74LVC3G58BQAR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability, low-power logic families.

The SN74LVC3G58 belongs to TI's LVC (Low-Voltage CMOS) logic portfolio, designed specifically for flexible, noise-resilient digital interfacing in space-constrained, mixed-voltage industrial and portable systems.

FAQ

What logic functions does the SN74LVC3G58BQAR support per channel?

The SN74LVC3G58BQAR supports eight logic configurations per channel - AND, OR, NAND, NOR, XOR, inverter, buffer, and one additional pattern - determined by the combination of its three inputs (A, B, C) per gate. Each of the three independent channels can be configured separately using the same truth table, enabling heterogeneous logic implementation within a single package.

Does SN74LVC3G58BQAR require external pull-up or pull-down resistors on unused inputs?

No - unused inputs on the SN74LVC3G58BQAR must be terminated to either VCC or GND, but may be connected directly (not through resistors) if permanently fixed. Pull-up/pull-down resistors (e.g., 10 kΩ) are only needed when the input may transition between used and unused states. Direct termination avoids unnecessary current draw and ensures defined logic levels, preventing floating inputs from causing excessive ICC or erratic behavior.

Can SN74LVC3G58BQAR interface safely with 5V microcontrollers?

Yes - the SN74LVC3G58BQAR features 5.5V-tolerant inputs, allowing direct connection to 5V GPIOs or open-drain outputs without level-shifting circuitry. It operates from 1.1V–3.6V VCC, so its outputs swing between 0V and its supply rail (e.g., 3.3V), which remains compatible with 5V-tolerant MCU inputs. This makes SN74LVC3G58BQAR ideal for bridging legacy 5V control logic with modern low-voltage subsystems.

What is the purpose of the thermal pad on the SN74LVC3G58BQAR (BQA package)?

The exposed thermal pad on the SN74LVC3G58BQAR serves as a primary heat conduction path from the die to the PCB. TI recommends connecting it to the GND plane to improve thermal resistance (RθJB = 70.9 °C/W) and stabilize junction temperature during sustained output switching. Leaving it unconnected degrades thermal performance and may limit maximum allowable output current in high-duty-cycle applications.

How does the Schmitt-trigger input architecture benefit SN74LVC3G58BQAR in real-world applications?

The Schmitt-trigger inputs of the SN74LVC3G58BQAR provide voltage hysteresis (ΔVT = 0.07–1.2 V), making it highly resistant to noise and slow signal edges. This eliminates the need for external RC filters when interfacing with mechanical switches, thermistors, comparators, or long traces - ensuring clean, bounce-free logic transitions even with rise/fall times exceeding microseconds, which is critical in power-good monitoring and sensor conditioning.