Texas Instruments SN74LVC3G34DCUT

Overview

SN74LVC3G34DCUT 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 with ±24-mA output drive at 3.3 V, 4.1-ns max propagation delay at 3.3 V, and 5.5-V tolerant inputs. It enables voltage translation from higher input levels down to the V_CC rail and supports partial-power-down via I_off in portable audio and embedded PC applications.

For engineers reviewing the SN74LVC3G34DCUT datasheet, SN74LVC3G34DCUT pinout, SN74LVC3G34DCUT application, or SN74LVC3G34DCUT equivalent, key selection criteria include its VSSOP-8 package, 3-channel buffering function, I_off-enabled live insertion capability, and compatibility with 1.65–5.5-V supply domains in space-constrained consumer electronics designs.

Technical Context

The SN74LVC3G34DCUT implements three independent CMOS buffer stages with identical input-to-output signal paths 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.

Its design supports mixed-voltage interfacing-e.g., translating 5-V microcontroller GPIOs to a 3.3-V domain-while maintaining fast edge rates (≤10 ns/V input transition rate) and low dynamic power (19 pF typical C_pd at 3.3 V). The device operates across –40°C to 125°C and meets JESD 78 Class II latch-up and JESD 22 ESD specifications.

Key Specifications

Pinout & Package

VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body, 0.65-mm lead pitch, 1.3-mm max height, exposed pad not present. Pin 1 identifier marked on top surface; tape-and-reel packaging with quadrant Q3 orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G34DCUR and SN74LVC1G34DBVR, the SN74LVC3G34DCUT delivers identical triple-buffer performance in a compact VSSOP-8 package optimized for low-MOQ design validation, while avoiding the layout overhead of discrete single-channel alternatives or the inflexibility of high-volume reels.

Availability

SN74LVC3G34DCUT is available at Aetrix Electronics and suitable for portable audio docks, embedded PCs, and solid-state drives requiring stable component supply with rapid prototyping support and consistent small-batch fulfillment.

Supply support for SN74LVC3G34DCUT 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 over 90 years of innovation in power management and signal chain technologies.

The SN74LVC3G34 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage interfacing, low static power, and high-speed performance in space-constrained consumer and industrial electronics.

FAQ

What is the maximum operating temperature range for the SN74LVC3G34DCUT?

The SN74LVC3G34DCUT is rated for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A104 and applies specifically to the VSSOP-8 (DCU) package variant. The specification ensures reliability in demanding environments such as automotive infotainment head units or industrial SSD controllers where thermal margins are critical. All electrical characteristics in the datasheet SCES366L are guaranteed across this full range.

Does the SN74LVC3G34DCUT support level translation between different supply voltages?

Yes, the SN74LVC3G34DCUT supports down-translation: its inputs tolerate up to 5.5 V regardless of V_CC, allowing connection to higher-voltage sources (e.g., 5-V microcontrollers) while operating from a lower V_CC rail (e.g., 3.3 V or 1.8 V). The outputs swing rail-to-rail between GND and V_CC, so it does not support up-translation. This behavior is explicitly confirmed in Section 8.3 ("Feature Description") of the SCES366L datasheet.

What is the purpose of the I_off feature in the SN74LVC3G34DCUT?

The I_off feature in the SN74LVC3G34DCUT disables all three outputs and blocks current backflow when V_CC = 0 V, protecting the device and system during partial-power-down or hot-insertion events. Measured at <±10 µA under I_off conditions, it enables safe use in modular systems like SSD add-in cards or telecom blades where individual sections may be powered independently. This is distinct from standard high-impedance states and is verified per JESD78 Class II latch-up testing.

Can the SN74LVC3G34DCUT drive LEDs directly?

Yes, the SN74LVC3G34DCUT can drive LEDs directly: each output delivers ±24 mA at V_CC = 3.3 V, sufficient for common indicator LEDs with appropriate series resistors. Its low output ground bounce (<0.8 V typical) and rail-to-rail swing ensure clean on/off transitions. This capability is cited in Section 9.1 ("Application Information") of the datasheet for portable audio and dock applications, and is validated across the full –40°C to 125°C temperature range.

What package type and dimensions does the SN74LVC3G34DCUT use?

The SN74LVC3G34DCUT uses the VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body size, 0.65-mm lead pitch, and 1.3-mm maximum height. Mechanical drawings confirm pin 1 location in quadrant Q3 of the tape-and-reel carrier. This package is distinct from the SM8 (DCT) and DSBGA (YZP) variants, and all thermal, timing, and drive specifications in SCES366L apply specifically to the DCU variant used in SN74LVC3G34DCUT.