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Texas Instruments SN74LVC3G34DCUR
- Part No.:
- SN74LVC3G34DCUR
- Manufacturer:
- Texas Instruments
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74LVC3G34DCUR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,945
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Product details
Overview
SN74LVC3G34DCUR from Texas Instruments is a triple non-inverting buffer gate IC designed for 1.65-V to 5.5-V VCC 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 signal buffering, level translation, and LED driving in portable audio and embedded PC interfaces.
For engineers reviewing the SN74LVC3G34DCUR datasheet, SN74LVC3G34DCUR pinout, SN74LVC3G34DCUR application, or SN74LVC3G34DCUR equivalent, key selection criteria include Ioff partial-power-down support, NanoFree™ VSSOP-8 package compatibility, 3.3-V/5-V mixed-voltage interface handling, and high-drive capability for fanout-sensitive digital paths.
Technical Context
The SN74LVC3G34DCUR integrates three independent CMOS buffer gates sharing a single VCC and GND, each implementing true non-inverting logic (Y = A) with rail-to-rail output swing. Its Ioff circuitry actively disables outputs during power-down, blocking back-current flow when VCC = 0 V.
Input voltage tolerance up to 5.5 V enables down-translation from higher-voltage domains (e.g., 5-V microcontroller I/O) to lower VCC rails (e.g., 1.8 V or 3.3 V), while its 3.5-pF typical input capacitance and 19-pF power-dissipation capacitance support clean signal integrity up to ~100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports mixed-voltage system interfacing and battery-powered operation across 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains. |
| Max tpd | 4.1 ns at VCC = 3.3 V - enables reliable timing in high-speed digital control paths with sub-5-ns budget margins. |
| IOH/IOL | ±24 mA at VCC = 3.3 V - drives multiple standard CMOS loads or low-current LEDs without external amplification. |
| Ioff | ±10 µA max - ensures safe live insertion and back-drive protection during hot-swap or partial-power-down sequences. |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V sources while powered from 1.8-V or 2.5-V rails, eliminating level-shifters. |
| ESD Rating | 2500-V HBM - meets industrial-grade robustness requirements for handheld and consumer electronics assembly. |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
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, RoHS-compliant NiPdAu/Sn lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Buffer Input 1 | CMOS-compatible input accepting 0–5.5 V; must be tied to VCC or GND if unused to prevent floating states. |
| 1Y | Buffer Output 1 | Non-inverting output with ±24-mA drive; capable of sourcing/sinking full logic swing from GND to VCC. |
| 2A | Buffer Input 2 | Independent input identical to 1A; electrically isolated from other channels except shared VCC/GND. |
| 2Y | Buffer Output 2 | Output with same timing and drive specs as 1Y; usable for parallel signal distribution or clock fanout. |
| 3A | Buffer Input 3 | Third input channel; supports independent enable/disable via upstream logic without affecting other buffers. |
| 3Y | Buffer Output 3 | Final buffered output; maintains consistent tpd and noise immunity across all three channels. |
| GND | Ground Reference | Common return path for all internal circuitry and output current; requires low-impedance PCB connection. |
| VCC | Power Supply | Single-supply rail powering all three buffers; bypass capacitor (0.1 µF) required adjacent to pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Dies-as-package construction reduces footprint to 2.30 mm × 2.00 mm - ideal for space-constrained portable designs like wireless headsets and SSDs. |
| Ioff partial-power-down | Automatically disables outputs when VCC = 0 V, preventing destructive back-current during hot-plug or power sequencing events. |
| 5.5-V tolerant inputs | Accepts 5-V signals while operating from 1.65-V rails - eliminates discrete level translators in mixed-voltage I/O expansion. |
| Low dynamic power | 10-µA max ICC at standby - extends battery life in always-on audio docks and PDA peripheral interfaces. |
| High noise immunity | Typical VOLP < 0.8 V and VO HV > 2 V at 3.3 V - suppresses ground bounce and undershoot in high-speed switching applications. |
Applications
| Audio Dock Interface | Embedded PC Expansion |
|---|---|
|
Use Scenario: Buffering I²C or GPIO signals between a 5-V host MCU and 3.3-V audio codec in a portable docking station. IC Role / Device Role / Timing Role: Signal-level translator and fanout amplifier ensuring logic compatibility and noise margin across voltage domains. Use Value: Eliminates need for discrete level-shifter ICs while maintaining <4.1-ns propagation delay for real-time audio control response. |
Use Scenario: Driving multiple status LEDs and reset lines from a single 1.8-V SoC GPIO bank in an industrial embedded PC. IC Role / Device Role / Timing Role: High-current buffer enabling simultaneous LED activation without loading the SoC's weak GPIO drivers. Use Value: Delivers ±24-mA per output at 1.8 V - sufficient to drive 3–5 mA LEDs directly, reducing BOM count and board area. |
| Solid-State Drive Control | Wireless Peripheral Hub |
|
Use Scenario: Isolating and strengthening SATA or PCIe sideband signals (e.g., CLKREQ#, PERST#) in client SSD modules. IC Role / Device Role / Timing Role: Low-skew, low-capacitance buffer preserving signal integrity on critical control lines with tight timing budgets. Use Value: 3.5-pF input capacitance and 19-pF Cpd minimize loading on high-frequency sideband traces, avoiding timing violations. |
Use Scenario: Managing bidirectional data lines between a Bluetooth SoC (3.3 V) and USB-UART bridge (5 V) in a wireless keyboard/mouse hub. IC Role / Device Role / Timing Role: Direction-agnostic voltage translator supporting both upstream and downstream signal conditioning. Use Value: 5.5-V input tolerance allows safe 5-V signal reception while powered from 3.3-V rail - no external clamping diodes needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple buffer gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC3G34DCUT | Same die, VSSOP-8 package, but supplied in 250-unit small tape-and-reel - differs only in packaging quantity and reel dimensions. | Identical electrical and thermal performance; selected when prototyping or low-volume production requires smaller reels. | Choose SN74LVC3G34DCUT for evaluation or pilot runs; SN74LVC3G34DCUR preferred for volume manufacturing due to 3000-unit reel efficiency. |
| SN74AUP3G34DCUR | Ultra-low-power variant: 0.9-V to 3.6-V VCC, 1.8-ns tpd at 3.3 V, but reduced drive (±4 mA) and no 5.5-V input tolerance. | Better suited for ultra-low-power wearables or sensor nodes where speed and drive are secondary to quiescent current. | Select SN74AUP3G34DCUR only when VCC ≤ 3.6 V and drive < ±8 mA suffices; SN74LVC3G34DCUR remains optimal for mixed-voltage, high-drive needs. |
Compared with SN74LVC3G34DCUT and SN74AUP3G34DCUR, the SN74LVC3G34DCUR uniquely balances wide VCC range (1.65–5.5 V), high drive (±24 mA), and 5.5-V input tolerance - making it the only choice for robust, mixed-rail buffering in consumer and industrial edge devices.
Availability
SN74LVC3G34DCUR is available at Aetrix Electronics and suitable for portable audio docks, embedded PCs, solid-state drives, and wireless peripherals requiring stable component supply, long-term lifecycle support, and RoHS-compliant VSSOP packaging.
Supply support for SN74LVC3G34DCUR 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 50 years of innovation in high-reliability, energy-efficient IC design.
The SN74LVC3G34DCUR belongs to TI's LVC (Low-Voltage CMOS) logic family - engineered for flexible voltage operation, high noise immunity, and seamless integration into mixed-signal systems from consumer to industrial applications.
FAQ
What is the maximum operating temperature for the SN74LVC3G34DCUR?
The SN74LVC3G34DCUR is rated for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 latch-up testing and thermal characterization in the VSSOP-8 (DCU) package, making it suitable for under-hood automotive and industrial control applications where thermal stress is critical. The SN74LVC3G34DCUR maintains full electrical specifications across this range.
Does the SN74LVC3G34DCUR support partial power-down functionality?
Yes, the SN74LVC3G34DCUR features integrated Ioff circuitry that automatically disables all three buffer outputs when VCC is at 0 V. This prevents damaging back-current flow during hot-insertion, power sequencing, or partial system shutdown - a key requirement for modular systems like docking stations and server backplanes using the SN74LVC3G34DCUR.
Can the SN74LVC3G34DCUR translate 5-V input signals to a 1.8-V logic domain?
Yes, the SN74LVC3G34DCUR accepts input voltages up to 5.5 V regardless of VCC level, enabling true down-translation. When powered from 1.8 V, its inputs safely interface with 5-V sources, and outputs swing rail-to-rail from 0 V to 1.8 V - allowing direct connection to 1.8-V logic without external resistors or translators. This behavior is guaranteed in the SN74LVC3G34DCUR datasheet Section 8.3.
What is the recommended bypass capacitor for the SN74LVC3G34DCUR VCC pin?
A 0.1-µF ceramic capacitor placed as close as possible to the VCC pin (Pin 8) and GND (Pin 4) is recommended for the SN74LVC3G34DCUR. TI's layout guidelines specify this value to suppress high-frequency noise and transient current spikes caused by fast output switching. For multi-device boards, adding a bulk 1-µF capacitor nearby further stabilizes the local supply rail feeding the SN74LVC3G34DCUR.
Is the SN74LVC3G34DCUR pin-compatible with other members of the SN74LVC3Gxx series?
No - the SN74LVC3G34DCUR is not pin-compatible with other SN74LVC3Gxx variants (e.g., SN74LVC3G74 or SN74LVC3G86) because each device implements different logic functions (buffer vs. D-flip-flop vs. AND gate) with distinct internal routing. While all share the same VSSOP-8 (DCU) package outline and pin count, the pin functions (e.g., clock, data, enable) differ fundamentally. Always verify pin mapping against the specific SN74LVC3G34DCUR functional diagram.
SN74LVC3G34DCUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8-VSSOP
SN74LVC3G34DCUR FAQ
1.How can I place an order for SN74LVC3G34DCUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC3G34DCUR 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 SN74LVC3G34DCUR reliable?
The price and inventory of SN74LVC3G34DCUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC3G34DCUR is usually 5 days.
3.What payment methods are accepted for SN74LVC3G34DCUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC3G34DCUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC3G34DCUR?
SN74LVC3G34DCUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC3G34DCUR 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 SN74LVC3G34DCUR?
For technical support, including SN74LVC3G34DCUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC3G34DCUR requirements.
6.How does Aetrix verify that SN74LVC3G34DCUR is sourced from the original manufacturer or authorized distributors?
All SN74LVC3G34DCUR 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 SN74LVC3G34DCUR meets industry standards.
7.What is the process for return or replacement of SN74LVC3G34DCUR?
All SN74LVC3G34DCUR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC3G34DCUR, 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 SN74LVC3G34DCUR part is unused and in its original packaging.
Return procedure for SN74LVC3G34DCUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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