Texas Instruments SN74LVC3G34DCURE4

Overview

SN74LVC3G34 from Texas Instruments is a triple non-inverting buffer gate IC designed for 1.65-V to 5.5-V V_CC operation, performing Y = A logic across three independent channels. It delivers ±24-mA output drive at 3.3 V, achieves 4.1-ns max propagation delay at 3.3 V, and supports 5.5-V-tolerant inputs - enabling level translation in portable audio and embedded PC signal routing.

For engineers reviewing the SN74LVC3G34 datasheet, SN74LVC3G34 pinout, SN74LVC3G34 application, or SN74LVC3G34 equivalent, key selection criteria include I_off partial-power-down capability, NanoFree™/VSSOP package compatibility, 3.3-V high-speed buffering with ground bounce <0.8 V, and down-translation from 5.5-V inputs to lower V_CC rails.

Technical Context

The SN74LVC3G34 implements three independent CMOS buffer stages with identical input/output characteristics and no internal inversion. Each channel features rail-to-rail output swing, 5.5-V-tolerant inputs regardless of V_CC, and I_off circuitry that disables outputs and blocks current backflow when V_CC = 0 V.

It operates across –40°C to 125°C (DCT/DCU packages) with 1.65–5.5-V supply range, supports live insertion via I_off, and meets JESD 78 Class II latch-up (>100 mA) and JESD 22 ESD ratings (2500-V HBM, 1500-V CDM).

Key Specifications

Pinout & Package

SN74LVC3G34DCURE4 uses the 8-pin VSSOP (DCU) package, measuring 2.30 mm × 2.00 mm with 0.5-mm lead pitch and 1.3-mm max height. The package supports standard reflow profiles (MSL Level-1, 260°C peak) and features gull-wing leads for optical inspection and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G34DCURE4, SN74LVC1G34DBVR offers footprint flexibility at the cost of channel density, while 74LVC3G17GW trades minor speed reduction for broader global supply chain access - both require validation of I_off behavior and thermal derating in 125°C environments.

Availability

SN74LVC3G34DCURE4 is available at Aetrix Electronics and suitable for portable audio docks, embedded PC GPIO expansion, SSD power sequencing, and TV backlight control requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for SN74LVC3G34DCURE4 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with leadership in low-power logic, precision analog, and high-reliability interface solutions.

The SN74LVC3G34 belongs to TI's LVC logic family, engineered for voltage-flexible, high-drive buffering in space- and power-constrained portable and industrial systems - emphasizing I_off, level translation, and thermal robustness.

FAQ

What is the maximum operating temperature for SN74LVC3G34DCURE4?

The SN74LVC3G34DCURE4 is rated for operation from –40°C to 125°C ambient temperature, matching the VSSOP (DCU) package specification. This range is validated per JEDEC JESD22-A108 and supports deployment in automotive engine-control proximity, telecom power supplies, and industrial SSDs where junction temperatures may exceed 100°C under sustained load.

Does SN74LVC3G34DCURE4 support level translation between 5-V and 3.3-V logic domains?

Yes, SN74LVC3G34DCURE4 supports down-translation: its inputs tolerate up to 5.5 V regardless of V_CC, allowing 5-V signals to safely drive the device when powered at 3.3 V or 1.8 V. Outputs swing rail-to-rail within the V_CC domain, making SN74LVC3G34DCURE4 suitable for interfacing legacy 5-V peripherals with modern low-voltage controllers.

How does the I_off feature function in SN74LVC3G34DCURE4?

The I_off circuitry in SN74LVC3G34DCURE4 automatically disables all three buffer outputs and blocks current flow when V_CC = 0 V, limiting I_off to ±10 µA. This prevents damaging back-current from live system buses into a powered-down SN74LVC3G34DCURE4 - a critical requirement for hot-pluggable modules and partial-power-down architectures.

What is the recommended bypass capacitor for SN74LVC3G34DCURE4?

A 0.1-µF ceramic capacitor placed as close as possible to the V_CC pin (Pin 8) and GND (Pin 4) is recommended for SN74LVC3G34DCURE4. TI specifies this value to suppress high-frequency noise generated by fast 4.1-ns switching edges and ensure stable operation under ±24-mA transient loads - placement within 2 mm of the pins is critical for effectiveness.

Can SN74LVC3G34DCURE4 drive LEDs directly?

Yes, SN74LVC3G34DCURE4 can drive LEDs directly: each output delivers up to 24 mA sink/source at 3.3 V, sufficient for indicator LEDs or low-current backlight segments. Designers must limit forward current using series resistors calculated from V_OL (0.55 V typ) and target LED voltage drop, and verify total package power dissipation remains within thermal limits at 125°C ambient.