Texas Instruments SN74LVC1G34YFPR

Overview

SN74LVC1G34YFPR from Texas Instruments is a single non-inverting CMOS buffer gate designed for 1.65V–5.5V V_CC operation, delivering ±24mA output drive at 3.3V, 3.5ns max propagation delay (t_pd) at 3.3V/CL=15pF, and I_off support for live insertion and partial power-down. It serves as a level-translating signal conditioner in portable audio and embedded interface paths.

For engineers reviewing the SN74LVC1G34YFPR datasheet, SN74LVC1G34YFPR pinout, SN74LVC1G34YFPR application, or SN74LVC1G34YFPR equivalent, key selection criteria include its DSBGA-4 (YFP) 0.76mm × 0.76mm ultra-small footprint, 5.5V-tolerant inputs, down-translation capability to V_CC, and guaranteed operation from –40°C to 85°C in consumer and industrial systems.

Technical Context

The SN74LVC1G34YFPR implements a single positive-logic buffer (Y = A) with rail-to-rail CMOS output swing and input voltage tolerance up to 5.5V independent of V_CC. Its I_off circuitry actively disables outputs during power-down, blocking back-drive current and enabling hot-plug compatibility.

It operates across a broad V_CC range (1.65V–5.5V), supports mixed-voltage interfacing via input overvoltage tolerance and output down-translation, and maintains low static ICC (≤10μA) while delivering high-speed switching (t_pd ≤3.5ns at 3.3V) into 15pF loads.

Key Specifications

Pinout & Package

SN74LVC1G34YFPR uses the YFP package: a 4-ball DSBGA (Die Size Ball Grid Array) with 0.4mm pitch, 0.76mm × 0.76mm body size, and top-side ball layout optimized for minimal PCB area and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G17YFPR and 74LVC1G34GSX, SN74LVC1G34YFPR offers the smallest PCB footprint (0.58mm²), fastest guaranteed t_pd (3.5ns), and lowest I_off leakage (≤10μA), making it optimal for miniaturized, power-sensitive, and timing-critical portable interfaces.

Availability

SN74LVC1G34YFPR is available at Aetrix Electronics and suitable for portable audio docks, SSD controller boards, wireless headset subsystems, and HDTV CEC signal conditioning requiring stable component supply and consistent DSBGA-4 packaging.

Supply support for SN74LVC1G34YFPR 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 low-power, high-reliability interface ICs.

The SN74LVC1G34YFPR belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for ultra-small form factor, mixed-voltage interoperability, and robust operation in portable and consumer electronics.

FAQ

What is the maximum operating temperature for SN74LVC1G34YFPR?

The SN74LVC1G34YFPR is rated for operation from –40°C to +85°C ambient temperature. This range applies specifically to the YFP (DSBGA-4) package variant and is validated per JEDEC JESD78 Class II latch-up testing and JESD22 reliability standards. The device's thermal resistance (R_θJA = 130°C/W) ensures junction temperature remains within safe limits under typical PCB layouts with moderate power dissipation.

Does SN74LVC1G34YFPR support 5V logic inputs when powered from 1.8V?

Yes, SN74LVC1G34YFPR accepts input voltages up to 5.5V regardless of V_CC, including when V_CC = 1.8V. This 5V-tolerant input capability is explicitly specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables. It enables direct interfacing with legacy 5V peripherals without external level-shifting components, while the output swings from GND to the applied V_CC (i.e., 1.8V), achieving true down-translation.

What is the purpose of the I_off feature in SN74LVC1G34YFPR?

The I_off feature in SN74LVC1G34YFPR disables the output drivers when V_CC = 0V, limiting leakage current to ≤±10μA. This prevents damaging back-current flow from live system buses into a powered-down section of the circuit. It is essential for hot-plug applications such as removable audio docks or SSD modules, where connectors may be mated while one side is unpowered, and supports partial power-down modes in battery-operated devices.

Can SN74LVC1G34YFPR drive an LED directly?

Yes, SN74LVC1G34YFPR can drive a standard indicator LED directly when configured as a low-side switch (LED anode to V_CC, cathode to Y output). At V_CC = 3.3V, it delivers up to 24mA sink current, sufficient for most 2–20mA LEDs. Ensure series resistance is selected to limit current below the absolute maximum I_OL rating (24mA) and verify VOL remains ≤0.55V at the target current to maintain adequate forward voltage margin.

Is SN74LVC1G34YFPR pin-compatible with other SN74LVC1G34 package variants?

No, SN74LVC1G34YFPR (DSBGA-4, 4-ball) is not pin-compatible with other SN74LVC1G34 package variants such as DBV (SOT-23-5), DCK (SC70-5), or DPW (X2SON-5). The YFP package has only four terminals (A, Y, V_CC, GND) with no NC pins, whereas 5-pin packages allocate Pin 1 as NC and use different pin numbering and physical layout. Board redesign is required when substituting between these packages.