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Texas Instruments SN74AVC1T45DBVRG4
- Part No.:
- SN74AVC1T45DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVC1T45DBVRG4.pdf
- Description:
- IC TRANSLATOR BIDIR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,871
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Product details
Overview
SN74AVC1T45 from Texas Instruments is a single-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V domains with ±12mA drive at 3.3V, 4.6V I/O tolerance, and VCC isolation. It serves as a level-shifting interface in mixed-voltage SoC-to-peripheral communication.
For engineers reviewing the SN74AVC1T45 datasheet, SN74AVC1T45 pinout, SN74AVC1T45 application, or SN74AVC1T45 equivalent, key selection criteria include configurable dual-rail operation (VCCA/VCCB = 1.2–3.6V), direction-controlled data flow (DIR referenced to VCCA), Ioff partial-power-down support, and verified 500Mbps throughput for 1.8V→3.3V translation.
Technical Context
The SN74AVC1T45 implements a noninverting, dual-rail architecture where A-port logic levels track VCCA and B-port levels track VCCB - both independently configurable across 1.2V–3.6V. DIR input is powered by VCCA and controls signal direction: high enables A→B transmission, low enables B→A.
VCC isolation ensures both ports enter high-impedance state if either VCCA or VCCB is at GND. Ioff circuitry disables outputs during partial power-down, preventing backflow current when one supply is inactive - critical for hot-swap and battery-backed subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V each - supports universal translation among 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external biasing |
| Max Data Rate | 500Mbps (1.8V→3.3V) - enables high-speed interconnect in USB PHY interfaces and memory expansion buses |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with legacy 5V-tolerant systems while operating at sub-3.3V supplies |
| Output Drive | ±12mA at 3.3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads without external buffers |
| Propagation Delay | 2.8ns (A→B, VCCA=3.3V, VCCB=3.3V) - meets timing budgets for DDR clock forwarding and PCIe sideband signaling |
| ESD Protection | ±2000V HBM - exceeds JEDEC JESD22-A114A for robustness in handheld and industrial assembly environments |
| Ioff Current | ±0.1µA max - ensures negligible leakage during system sleep modes, preserving battery life in portable devices |
Pinout & Package
SN74AVC1T45DBVRG4 uses the DBV (SOT-23-6) package: 2.9mm × 2.8mm body, 6-pin surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply rail | Powers A-port I/O and DIR input; defines A-side logic thresholds and output swing |
| GND (Pin 2) | Reference ground | Common return path for both supply rails; must be low-inductance for noise immunity |
| A (Pin 3) | Bidirectional I/O (A-side) | Connects to 1.2–3.6V domain; referenced to VCCA; requires defined logic level at all times |
| B (Pin 4) | Bidirectional I/O (B-side) | Connects to independent 1.2–3.6V domain; referenced to VCCB; shares no voltage dependency with A |
| DIR (Pin 5) | Direction control input | Active-high signal referenced to VCCA; determines data flow direction (H = A→B, L = B→A) |
| VCCB (Pin 6) | B-port supply rail | Powers B-port I/O only; fully isolated from VCCA; enables true dual-voltage operation |
Key Features
| Feature | Design Value |
|---|---|
| Fully configurable dual-rail supply | VCCA and VCCB operate independently across 1.2V–3.6V - eliminates need for external level-shifters in heterogeneous voltage systems |
| VCC isolation | Both ports auto-enter high-Z if either VCCA or VCCB = GND - prevents bus contention during power sequencing or fault conditions |
| Ioff partial-power-down support | Outputs disabled with <±0.1µA leakage when VCCA or VCCB = 0V - essential for battery-powered subsystems with dynamic rail gating |
| 4.6V I/O tolerance | Withstands overvoltage on A/B pins up to 4.6V regardless of VCCA/VCCB - simplifies interface to 5V legacy peripherals without clamping diodes |
| NanoFree™ packaging | Dies-as-package construction reduces parasitic inductance and footprint - improves signal integrity and saves PCB area in space-constrained designs |
Applications
| Mobile Baseband Interface | Industrial Sensor Hub |
|---|---|
Use Scenario: Connecting a 1.8V application processor to a 3.3V camera module in smartphone design. IC Role / Device Role / Timing Role: Bidirectional level translator managing command/response traffic (I²C-like protocol) with DIR toggled per transaction phase. Use Value: Enables direct integration without external voltage translators or level-shifting buffers, reducing BOM count and layout complexity. | Use Scenario: Interfacing a 1.2V microcontroller ADC interface to 2.5V analog sensor outputs in factory automation equipment. IC Role / Device Role / Timing Role: Unidirectional translator (fixed DIR) converting sensor analog front-end logic levels to MCU-compatible digital signals. Use Value: Maintains signal fidelity at 240Mbps (1.2V→2.5V) while tolerating sensor supply ripple up to 4.6V. |
| Enterprise SSD Controller | Telecom SFP+ Module |
Use Scenario: Bridging 1.5V NVMe controller logic to 3.3V flash memory command bus in enterprise solid-state drives. IC Role / Device Role / Timing Role: High-speed bidirectional translator supporting burst-mode address/data transfers with sub-3ns propagation delay. Use Value: Achieves 320Mbps throughput (1.5V→3.3V) with guaranteed timing margins under full temperature range (–40°C to 85°C). | Use Scenario: Level-shifting management interface signals (e.g., MDIO) between 1.8V FPGA and 3.3V SFP+ transceiver in optical line cards. IC Role / Device Role / Timing Role: Low-latency unidirectional translator (DIR fixed) handling configuration and status registers with ESD-hardened I/O. Use Value: ±2000V HBM protection ensures reliability during field-replaceable module insertion/removal in telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1T45DBVR | Single-supply (VCC only); no VCC isolation; max 3.6V supply; 32mA drive at 3.3V | Requires shared supply rail; unsuitable for asymmetric power sequencing or isolated domain bridging | Select when cost sensitivity outweighs dual-rail flexibility and Ioff requirements |
| TXS0101DBVR | Auto-direction sensing (no DIR pin); lower drive (±2mA); supports 1.65–5.5V translation; higher propagation delay (~10ns) | Eliminates direction control logic but limits speed and drive strength; not suitable for high-throughput protocols | Select for simple GPIO-level translation where direction changes infrequently and speed is secondary |
Compared with SN74LVC1T45DBVR and TXS0101DBVR, the SN74AVC1T45DBVRG4 uniquely delivers true dual-rail independence, VCC isolation, and 500Mbps capability - making it the only choice for robust, high-speed, mixed-voltage SoC interconnects requiring guaranteed power sequencing safety.
Availability
SN74AVC1T45DBVRG4 is available at Aetrix Electronics and suitable for mobile baseband interfaces, industrial sensor hubs, enterprise SSD controllers, and telecom SFP+ modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for SN74AVC1T45DBVRG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The SN74AVC1T45 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for ultra-low-voltage bidirectional level translation in space- and power-constrained portable and embedded systems.
FAQ
What is the maximum supported data rate for SN74AVC1T45DBVRG4 in 1.8V-to-3.3V translation?
The SN74AVC1T45DBVRG4 supports up to 500Mbps in 1.8V-to-3.3V translation, as specified in the official Texas Instruments datasheet SCES530L. This performance is validated across the full operating temperature range (–40°C to 85°C) and applies specifically to the DBV package variant. The 500Mbps figure reflects typical switching characteristics under recommended operating conditions with matched load capacitance and signal edge rates.
Can SN74AVC1T45DBVRG4 operate with VCCA = 1.2V and VCCB = 3.3V simultaneously?
Yes, SN74AVC1T45DBVRG4 is explicitly designed for simultaneous operation with VCCA = 1.2V and VCCB = 3.3V. Its dual-rail architecture supports any combination within the 1.2V–3.6V range per rail, enabling direct 1.2V↔3.3V translation. The device maintains specified timing (240Mbps min), drive strength (±12mA at 3.3V), and I/O tolerance (4.6V) under this condition, as confirmed in Sections 5.6–5.10 of the datasheet.
Does SN74AVC1T45DBVRG4 require external pull-up or pull-down resistors on the A or B ports?
No, SN74AVC1T45DBVRG4 does not require external pull-up or pull-down resistors on A or B ports. Its input circuitry includes weak internal pulldowns to prevent floating states, as documented in Section 5.3 Note (3) of the datasheet. However, in bidirectional applications with bus contention risk (e.g., I²C), external termination may still be needed per system-level protocol requirements - the IC itself provides intrinsic DC biasing.
How does the VCC isolation feature function in SN74AVC1T45DBVRG4?
The VCC isolation feature in SN74AVC1T45DBVRG4 forces both A and B ports into high-impedance state whenever either VCCA or VCCB is driven to GND. This behavior is hardware-enforced and requires no external logic. It prevents back-driving or contention during power-up/down sequencing, hot-swap events, or fault conditions - a key differentiator from single-supply translators like SN74LVC1T45DBVR.
Is SN74AVC1T45DBVRG4 compatible with 5V logic systems?
SN74AVC1T45DBVRG4 is not 5V-tolerant for supply rails (VCCA/VCCB max = 3.6V), but its I/O pins are rated for 4.6V absolute maximum - allowing safe connection to 5V systems *only* when used as an input receiver (not driving 5V loads). For true 5V↔sub-3.3V translation, TI recommends dedicated 5V-tolerant families such as TXB0104. The 4.6V rating protects against transient overvoltage, not sustained 5V operation.
SN74AVC1T45DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.2 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 500Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
SN74AVC1T45DBVRG4 FAQ
1.How can I place an order for SN74AVC1T45DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC1T45DBVRG4 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 SN74AVC1T45DBVRG4 reliable?
The price and inventory of SN74AVC1T45DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC1T45DBVRG4 is usually 5 days.
3.What payment methods are accepted for SN74AVC1T45DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC1T45DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AVC1T45DBVRG4?
SN74AVC1T45DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC1T45DBVRG4 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 SN74AVC1T45DBVRG4?
For technical support, including SN74AVC1T45DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC1T45DBVRG4 requirements.
6.How does Aetrix verify that SN74AVC1T45DBVRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AVC1T45DBVRG4 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 SN74AVC1T45DBVRG4 meets industry standards.
7.What is the process for return or replacement of SN74AVC1T45DBVRG4?
All SN74AVC1T45DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC1T45DBVRG4, 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 SN74AVC1T45DBVRG4 part is unused and in its original packaging.
Return procedure for SN74AVC1T45DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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