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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LVC3G34DCTRG4

Name: SN74LVC3G34DCTRG4
Brand: Texas Instruments
SKU: SN74LVC3G34DCTRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVC3G34DCTRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)

Datasheet:: SN74LVC3G34DCTRG4.pdf

Description:: IC BUFFER NON-INVERT 5.5V SM8

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Product details

Overview

SN74LVC3G34DCTRG4 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 - used in portable audio signal routing, LED driver staging, and level translation between mixed-voltage logic domains.

For engineers reviewing the SN74LVC3G34DCTRG4 datasheet, SN74LVC3G34DCTRG4 pinout, SN74LVC3G34DCTRG4 application, or SN74LVC3G34DCTRG4 equivalent, key selection criteria include I_off-enabled partial-power-down support, NanoFree™ SM8 package compatibility, 3-channel independent buffering, and down-translation capability from 5.5-V inputs to lower V_CC rails.

Technical Context

The SN74LVC3G34DCTRG4 implements three independent CMOS buffer stages with identical input/output characteristics per channel. Each buffer supports rail-to-rail input voltage tolerance up to 5.5 V regardless of V_CC, enabling robust interfacing across voltage domains.

Its I_off circuitry actively disables outputs during power-down, blocking back-current flow and supporting live insertion and hot-swap applications. The device operates across –40°C to 125°C ambient temperature in the DCT (SM8) package with 220°C/W junction-to-ambient thermal resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 5.5 V - enables single-supply operation across LVC logic families and mixed-voltage system interfaces.
Max t_pd	4.1 ns at V_CC = 3.3 V - supports reliable signal buffering up to ~100 MHz clock/data rates in low-latency paths.
I/O Voltage Tolerance	Inputs accept up to 5.5 V - allows direct connection to higher-voltage controllers without external level shifters.
Output Drive	±24 mA at V_CC = 3.3 V - sufficient to drive multiple CMOS loads or small LEDs without external drivers.
I_off Current	<±10 µA - ensures safe isolation during partial power-down, preventing backfeed into powered-down subsystems.
Power Consumption	10 µA max I_CC - minimizes quiescent current in battery-powered portable devices like MP3 players and headsets.
ESD Rating	2500 V HBM - meets industrial-grade ESD robustness requirements for consumer electronics assembly and field use.

Pinout & Package

SN74LVC3G34DCTRG4 uses the 8-pin SM8 (DCT) package measuring 2.95 mm × 2.80 mm with 0.65-mm lead pitch and 1.3-mm max height. It features gull-wing leads, exposed pad not present, and pin 1 marked by notch or bevel on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1A	Input 1	Non-inverting buffer input channel 1 - accepts 0–5.5 V signals independent of V_CC.
1Y	Output 1	Buffered output channel 1 - replicates 1A with high drive strength and low propagation delay.
2A	Input 2	Non-inverting buffer input channel 2 - electrically isolated from other channels; supports independent signal routing.
2Y	Output 2	Buffered output channel 2 - provides identical timing and drive as 1Y; no internal crosstalk coupling.
3A	Input 3	Non-inverting buffer input channel 3 - usable for third data path or control signal conditioning.
3Y	Output 3	Buffered output channel 3 - maintains full drive capability even when other outputs are loaded.
GND	Ground	Reference return for all I/O and internal logic - must be connected directly to system ground plane.
V_CC	Supply	Primary power rail - bypass capacitor (0.1 µF ceramic) required within 3 mm of this pin for stable operation.

Key Features

Feature	Design Value
Triple independent buffers	Three fully isolated Y = A logic paths enable concurrent signal conditioning without shared timing or loading effects.
I_off partial-power-down	Outputs disable automatically when V_CC = 0 V, preventing back-current and enabling hot-plug capability in modular systems.
5.5-V tolerant inputs	Accepts input voltages up to 5.5 V regardless of V_CC setting - simplifies interface to legacy 5-V microcontrollers or sensors.
NanoFree™ packaging	Dies serve as packages - eliminates bond wires and mold compound, reducing size, inductance, and thermal resistance.
Low ground bounce	Typical V_OLP < 0.8 V at 3.3 V - minimizes noise coupling into shared ground nets during fast output transitions.
Latch-up immunity	Exceeds 100 mA per JESD 78 Class II - ensures robust operation under transient overvoltage or ESD stress conditions.

Applications

Portable Audio Signal Routing	LED Driver Staging
Use Scenario: Routing digital audio control signals (e.g., mute, volume step, source select) between a 5-V microcontroller and 3.3-V codec in Bluetooth speakers or wireless headsets. IC Role / Device Role / Timing Role: Level-translating buffer isolating voltage domains while preserving signal integrity and timing margins. Use Value: Eliminates need for discrete level shifters; ±24-mA drive ensures clean edges into capacitive PCB traces and codec input capacitance.	Use Scenario: Driving multiple indicator LEDs from a low-drive GPIO of an embedded processor in SSD status panels or enterprise tablets. IC Role / Device Role / Timing Role: High-current buffer amplifying weak GPIO outputs to sustain LED forward current without MCU loading. Use Value: Single SN74LVC3G34DCTRG4 drives up to three LEDs simultaneously at 10–20 mA each, reducing BOM count vs. discrete transistors.
Mixed-Voltage Logic Interface	Hot-Swappable Module Control
Use Scenario: Interfacing a 5-V FPGA configuration bus to 1.8-V/2.5-V peripheral logic in AV receivers or Blu-ray players. IC Role / Device Role / Timing Role: Non-inverting voltage translator maintaining setup/hold timing for configuration registers. Use Value: 4.1-ns t_pd at 3.3 V ensures minimal skew; 5.5-V input tolerance avoids external clamping diodes.	Use Scenario: Enabling/disabling power rails or communication lines in modular telecom server blades that support live insertion. IC Role / Device Role / Timing Role: I_off-protected buffer gating control signals during blade power sequencing. Use Value: Prevents backfeed from powered-backplane into unpowered blade; ±10 µA I_off ensures safe isolation state.

Portable Audio Signal Routing

LED Driver Staging

Use Scenario: Routing digital audio control signals (e.g., mute, volume step, source select) between a 5-V microcontroller and 3.3-V codec in Bluetooth speakers or wireless headsets.

IC Role / Device Role / Timing Role: Level-translating buffer isolating voltage domains while preserving signal integrity and timing margins.

Use Value: Eliminates need for discrete level shifters; ±24-mA drive ensures clean edges into capacitive PCB traces and codec input capacitance.

Use Scenario: Driving multiple indicator LEDs from a low-drive GPIO of an embedded processor in SSD status panels or enterprise tablets.

IC Role / Device Role / Timing Role: High-current buffer amplifying weak GPIO outputs to sustain LED forward current without MCU loading.

Use Value: Single SN74LVC3G34DCTRG4 drives up to three LEDs simultaneously at 10–20 mA each, reducing BOM count vs. discrete transistors.

Mixed-Voltage Logic Interface

Hot-Swappable Module Control

Use Scenario: Interfacing a 5-V FPGA configuration bus to 1.8-V/2.5-V peripheral logic in AV receivers or Blu-ray players.

IC Role / Device Role / Timing Role: Non-inverting voltage translator maintaining setup/hold timing for configuration registers.

Use Value: 4.1-ns t_pd at 3.3 V ensures minimal skew; 5.5-V input tolerance avoids external clamping diodes.

Use Scenario: Enabling/disabling power rails or communication lines in modular telecom server blades that support live insertion.

IC Role / Device Role / Timing Role: I_off-protected buffer gating control signals during blade power sequencing.

Use Value: Prevents backfeed from powered-backplane into unpowered blade; ±10 µA I_off ensures safe isolation state.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC3G34DCURG4	VSSOP-8 (DCU) package, 2.30 mm × 2.00 mm body, 227°C/W θ_JA - smaller footprint but slightly higher thermal resistance than DCT.	Better suited for space-constrained layouts where board area is prioritized over thermal margin.	Select DCURG4 when PCB real estate is critical and ambient temperature remains ≤85°C.
SN74AUP3G34DCUR	Ultra-low-power AUP family; 0.8–3.6 V V_CC, 1.5-µA I_CC, 7.8-ns t_pd at 1.8 V - lower drive (±4 mA), no 5.5-V input tolerance.	Targeted at ultra-low-power always-on sensor nodes, not mixed-voltage translation or LED driving.	Choose AUP variant only for sub-1-V systems requiring nanowatt quiescent power, not for SN74LVC3G34DCTRG4's performance envelope.

Compared with SN74LVC3G34DCURG4 and SN74AUP3G34DCUR, the SN74LVC3G34DCTRG4 delivers superior output drive and voltage translation flexibility at the cost of higher static current - making it optimal for portable audio, LED, and hot-swap applications demanding robust interfacing.

Availability

SN74LVC3G34DCTRG4 is available at Aetrix Electronics and suitable for portable audio signal routing, LED driver staging, and mixed-voltage logic interface applications requiring stable component supply across industrial, consumer, and embedded design cycles.

Supply support for SN74LVC3G34DCTRG4 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets since 1930.

The SN74LVC3G34DCTRG4 belongs to TI's LVC logic family - engineered for low-voltage, high-speed, mixed-signal interfacing in portable and power-sensitive systems with emphasis on voltage translation and I_off safety.

FAQ

What is the maximum operating temperature for SN74LVC3G34DCTRG4?

The SN74LVC3G34DCTRG4 is rated for operation from –40°C to +125°C ambient temperature in the DCT (SM8) package. This range is validated per JEDEC JESD78 latch-up testing and thermal characterization, supporting deployment in automotive cabin modules and industrial control enclosures where extended thermal margins are required. Derating applies above 85°C for continuous high-output-current operation.

Does SN74LVC3G34DCTRG4 support level translation from 5-V to 3.3-V logic?

Yes, the SN74LVC3G34DCTRG4 supports down-translation: its inputs tolerate up to 5.5 V regardless of V_CC, so applying 5-V signals to 1A/2A/3A while powering V_CC at 3.3 V produces valid 3.3-V-compatible outputs at 1Y/2Y/3Y. This eliminates external level shifters in mixed-voltage designs such as FPGA-to-peripheral interfaces.

What is the purpose of the I_off feature in SN74LVC3G34DCTRG4?

The I_off feature in SN74LVC3G34DCTRG4 disables all outputs when V_CC = 0 V, blocking reverse current flow from powered inputs or outputs into the unpowered IC. This protects downstream circuitry during partial power-down, enables hot-swap capability in modular systems, and prevents latch-up in multi-rail boards - confirmed per JESD78 Class II testing.

Can SN74LVC3G34DCTRG4 drive LEDs directly?

Yes, SN74LVC3G34DCTRG4 can drive LEDs directly: each output delivers ±24 mA at 3.3 V, sufficient for standard 20-mA indicator LEDs. Use series resistors calculated for target forward current (e.g., 100 Ω for ~20 mA at 3.3 V), ensure total V_CC/GND current stays below 100 mA, and avoid simultaneous full-drive on all three outputs at elevated temperatures.

Is SN74LVC3G34DCTRG4 pin-compatible with other variants in the same family?

Yes, SN74LVC3G34DCTRG4 shares identical pinout and function with SN74LVC3G34DCT, SN74LVC3G34DCTR, and SN74LVC3G34DCUR - all follow the standard 8-pin triple buffer layout (1A, 1Y, 2A, 2Y, 3A, 3Y, GND, V_CC). However, DCU and YZP packages differ physically; only DCT/DCTR/DCTRG4 variants are mechanically interchangeable in SM8 footprints.

SN74LVC3G34DCTRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVC

Package/Case:: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 3

Number of Bits per Element:: 1

Input Type:: -

Output Type:: Push-Pull

Current - Output High, Low:: 32mA, 32mA

Voltage - Supply:: 1.65V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SM8

SN74LVC3G34DCTRG4 FAQ

1.How can I place an order for SN74LVC3G34DCTRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVC3G34DCTRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74LVC3G34DCTRG4 reliable?

The price and inventory of SN74LVC3G34DCTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC3G34DCTRG4 is usually 5 days.

3.What payment methods are accepted for SN74LVC3G34DCTRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC3G34DCTRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVC3G34DCTRG4?

SN74LVC3G34DCTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVC3G34DCTRG4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74LVC3G34DCTRG4?

For technical support, including SN74LVC3G34DCTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC3G34DCTRG4 requirements.

6.How does Aetrix verify that SN74LVC3G34DCTRG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVC3G34DCTRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC3G34DCTRG4 meets industry standards.

7.What is the process for return or replacement of SN74LVC3G34DCTRG4?

All SN74LVC3G34DCTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC3G34DCTRG4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74LVC3G34DCTRG4 part is unused and in its original packaging.

Return procedure for SN74LVC3G34DCTRG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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