Texas Instruments SN74LVC3G34YZAR

Overview

SN74LVC3G34YZAR 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 on 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 voltage translation in portable audio, SSD, and embedded PC signal routing.

For engineers reviewing the SN74LVC3G34YZAR datasheet, SN74LVC3G34YZAR pinout, SN74LVC3G34YZAR application, or SN74LVC3G34YZAR equivalent, key selection criteria include I_off-enabled partial-power-down protection, NanoFree™ DSBGA-8 package footprint (1.91 mm × 0.91 mm), 10-µA max ICC quiescent current, and compatibility with 1.65–5.5-V mixed-voltage system interfacing.

Technical Context

The SN74LVC3G34YZAR implements three independent CMOS buffer stages with identical input/output characteristics across all channels. Each buffer features rail-to-rail output swing, 5.5-V input tolerance regardless of V_CC, and I_off circuitry that disables outputs and blocks current backflow when V_CC = 0 V - critical for live insertion and hot-swap applications.

Its NanoFree™ DSBGA-8 package uses the silicon die as the package body, eliminating wirebonds and leadframes to reduce parasitic inductance and improve thermal performance. The device operates across –40°C to +85°C ambient temperature and meets JESD 78 Class II latch-up immunity (>100 mA) and JESD 22 ESD ratings (2500-V HBM, 1500-V CDM).

Key Specifications

Pinout & Package

SN74LVC3G34YZAR is housed in an 8-pin NanoFree™ DSBGA (YZP) package measuring 1.91 mm × 0.91 mm with bottom-side ball terminations. The package uses solder bumps directly on the die, delivering minimal trace inductance and optimized thermal resistance (R_θJA = 140°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G34YZAR, the DCUR offers wider temperature range and slightly better thermal resistance but occupies 2.5× more board area; the DCTR provides industrial-grade reliability in a widely supported SSOP footprint but adds significant height - making YZP optimal for space- and thickness-constrained portable designs.

Availability

SN74LVC3G34YZAR is available at Aetrix Electronics and suitable for portable audio, SSD control, and embedded PC applications requiring stable component supply, consistent NanoFree™ packaging, and guaranteed long-term availability for consumer electronics production programs.

Supply support for SN74LVC3G34YZAR 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 company specializing in analog and embedded processing technologies, with leadership in low-power logic, precision analog, and high-reliability interface solutions.

The SN74LVC3G34YZAR belongs to TI's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in portable, storage, and computing applications where size, power, and robustness are critical.

FAQ

What is the maximum operating temperature for SN74LVC3G34YZAR?

The SN74LVC3G34YZAR is rated for operation from –40°C to +85°C ambient temperature. This range is specified for the YZP (DSBGA) package variant and aligns with consumer and portable electronics thermal requirements. Exceeding +85°C may degrade parametric performance or reliability, and the device does not support the extended –40°C to +125°C range offered by the DCU and DCT package variants.

Does SN74LVC3G34YZAR support level translation between different supply voltages?

Yes, SN74LVC3G34YZAR supports down-translation: its inputs tolerate up to 5.5 V regardless of V_CC, allowing 5-V signals to be safely driven into a 1.8-V or 2.5-V powered SN74LVC3G34YZAR. However, it does not perform up-translation - outputs swing only between GND and the applied V_CC, so 1.8-V inputs yield 1.8-V outputs.

How should unused inputs be handled on SN74LVC3G34YZAR?

All unused inputs on SN74LVC3G34YZAR must be tied to either V_CC or GND to prevent floating nodes, which can cause excessive ICC, oscillation, or undefined logic states. TI recommends connecting unused inputs directly to V_CC or GND using short PCB traces - never leaving them open. This requirement applies even when I_off is active.

What is the purpose of the I_off feature in SN74LVC3G34YZAR?

The I_off feature in SN74LVC3G34YZAR disables all three buffer outputs and blocks current flow when V_CC = 0 V, preventing damaging back-current from live signal lines into a powered-down system. This enables safe hot-insertion, partial power-down modes, and back-drive protection - critical in modular or field-upgradeable systems where subsystems power up/down independently.

Can SN74LVC3G34YZAR drive LEDs directly?

Yes, SN74LVC3G34YZAR can drive LEDs directly: each output delivers up to 24 mA sink/source at 3.3 V, sufficient for indicator LEDs or low-current status displays. For reliable operation, connect the LED anode to V_CC and cathode to an output (sinking configuration), or use series current-limiting resistors - e.g., 100 Ω for ~20 mA at 3.3 V - to avoid exceeding absolute maximum ratings.