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Texas Instruments 74AVC4T245QWBQBRQ1
- Part No.:
- 74AVC4T245QWBQBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVC4T245QWBQBRQ1.pdf
- Description:
- AUTOMOTIVE FOUR-BIT DUAL-SUPPLY
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74AVC4T245QWBQBRQ1 from Texas Instruments is an automotive-grade 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V domains. It features independent VCCA and VCCB rails, 4.6V I/O tolerance, Ioff partial-power-down support, and up to 380Mbps data rate (1.8V→3.3V). It serves as a level-shifting interface in telematics and digital cluster systems.
For engineers reviewing the 74AVC4T245QWBQBRQ1 datasheet, 74AVC4T245QWBQBRQ1 pinout, 74AVC4T245QWBQBRQ1 application, or 74AVC4T245QWBQBRQ1 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (–40°C to 125°C), configurable dual-rail operation, direction-control logic referenced to VCCA, and guaranteed 3-state output behavior during power sequencing.
Technical Context
The 74AVC4T245QWBQBRQ1 implements two independent 2-bit bidirectional translation channels, each controlled by dedicated DIR and OE inputs referenced to VCCA. Its dual-rail architecture decouples A-port (VCCA-referenced) and B-port (VCCB-referenced) logic thresholds, enabling asynchronous translation across mismatched supply domains without external biasing.
It integrates VCC isolation: if either VCCA or VCCB is at GND, both ports enter high-impedance state. The Ioff circuitry actively disables outputs during partial power-down, preventing backflow current up to ±50mA per I/O while maintaining 4.6V tolerance on unpowered ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V - enables translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains without level-shifters. |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interconnects in infotainment backplanes and display interfaces. |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage peripherals even when VCCA/VCCB are at minimum 1.2V. |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and instrument panel deployment. |
| ESD Rating | HBM ±8kV, CDM ±1kV - meets automotive ESD robustness requirements for manufacturing and field reliability. |
| Propagation Delay | 2.6ns typical (A↔B, VCCA=2.5V/VCCB=3.3V) - ensures timing-critical signal integrity in real-time vehicle networks. |
| Quiescent Current | 16μA max (ICCA + ICCB) - minimizes standby power in always-on automotive modules. |
Pinout & Package
74AVC4T245QWBQBRQ1 is packaged in a 16-pin WQFN (BQB) with 3.5mm × 2.5mm footprint and exposed thermal pad. The package supports automated optical inspection and provides low thermal resistance (RθJA = 80.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply rail | Powers A-side I/Os and control inputs (DIR/OE); sets VIH/VIL thresholds for all control signals. |
| VCCB (Pin 16) | B-port supply rail | Powers B-side I/Os only; defines output swing and input threshold for B-port signals. |
| 1DIR, 2DIR (Pins 2, 3) | Direction control inputs | Referenced to VCCA; high = A→B transfer, low = B→A transfer for respective 2-bit channel. |
| 1OE, 2OE (Pins 15, 14) | Output-enable inputs | Referenced to VCCA; low = active drive, high = 3-state (Hi-Z) for corresponding channel. |
| 1A1–2A2 (Pins 4–7) | A-port I/Os | 4-bit A-side data lines referenced to VCCA; tolerate up to 4.6V regardless of VCCA setting. |
| 1B1–2B2 (Pins 13, 12, 11, 10) | B-port I/Os | 4-bit B-side data lines referenced to VCCB; tolerate up to 4.6V regardless of VCCB setting. |
| GND (Pins 8, 9) | Ground terminals | Dual ground pins improve noise immunity and support low-inductance return paths for both supply domains. |
| Thermal Pad | Exposed thermal pad | Must be connected to PCB ground plane for thermal management and EMI reduction; not electrically required but strongly recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dual-rail translation | Independent VCCA and VCCB supplies (1.2V–3.6V) enable any-to-any low-voltage domain bridging without external components. |
| VCC isolation | Automatic Hi-Z on both ports if either VCCA or VCCB is at GND - prevents latch-up and ensures safe power sequencing. |
| Ioff partial-power-down | Blocks damaging backflow current when one rail is powered down - essential for hot-plug and sleep-mode operation. |
| Automotive qualification | AEC-Q100 Grade 1, HBM ±8kV, CDM ±1kV, and function-safety capable - validated for safety-critical vehicle subsystems. |
| High-speed performance | Sub-3ns propagation delay and 380Mbps max throughput - meets timing budgets for CAN FD auxiliary buses and display pixel clocks. |
Applications
| Telematics Control Unit | Digital Instrument Cluster |
|---|---|
|
Use Scenario: Interfacing a 1.8V microcontroller to a 3.3V cellular modem and GPS receiver in a vehicle telematics module. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing data flow between MCU UART/SPI and modem serial interfaces. Use Value: Eliminates need for discrete level-shifter ICs or resistor-based solutions, reducing BOM count and board area while guaranteeing signal integrity at 380Mbps. |
Use Scenario: Connecting a 2.5V graphics processor to a 1.2V display timing controller in a digital dashboard. IC Role / Device Role / Timing Role: Synchronous parallel bus translator for RGB/HSYNC/VSYNC signals with precise edge alignment. Use Value: Sub-3ns propagation delay ensures pixel clock timing margin compliance; Ioff prevents display corruption during processor sleep transitions. |
| Infotainment Head Unit | ADAS Camera Interface |
|
Use Scenario: Bridging a 3.3V audio codec and 1.5V SoC in an automotive head unit with multi-zone audio processing. IC Role / Device Role / Timing Role: Low-latency I²S and control bus translator supporting sample-accurate audio routing. Use Value: 4.6V I/O tolerance allows direct connection to legacy 3.3V codecs without clamping diodes; AEC-Q100 ensures long-term reliability in cabin temperature cycling. |
Use Scenario: Translating MIPI CSI-2 D-PHY control signals (1.2V) from an image sensor to a 1.8V ADAS processor. IC Role / Device Role / Timing Role: High-speed bidirectional translator for I²C configuration bus and GPIO status lines. Use Value: Supports 200Mbps operation at 1.2V→1.8V translation; thermal pad and WQFN package enable compact placement near sensor connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH4T245QWRQ1 | Lacks Ioff and VCC isolation; rated for 1.65V–3.6V only (no 1.2V support). | Suitable for non-power-gated systems where both rails remain active; not compliant with partial-power-down requirements. | Select when cost sensitivity outweighs need for Ioff or extended 1.2V operation. |
| TXS4T245QPWRQ1 | Auto-direction sensing (no DIR pins); lower drive strength (±8mA vs ±12mA); no 380Mbps rating. | Better for simple push-pull buses with unidirectional dominant traffic; unsuitable for synchronous bidirectional protocols like SPI. | Choose for space-constrained designs needing auto-direction and lower quiescent current, accepting reduced speed and drive capability. |
Compared with SN74AVCH4T245QWRQ1 and TXS4T245QPWRQ1, the 74AVC4T245QWBQBRQ1 uniquely delivers full 1.2V–3.6V dual-rail flexibility, Ioff-enabled power gating, and highest data rate - making it the only option qualified for safety-critical, thermally constrained, and dynamically powered automotive subsystems.
Availability
74AVC4T245QWBQBRQ1 is available at Aetrix Electronics and suitable for telematics control units, digital instrument clusters, and infotainment head units requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for 74AVC4T245QWBQBRQ1 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 automotive, industrial, and consumer markets.
The SN74AVC4T245-Q1 belongs to TI's automotive-qualified AVC logic family, engineered specifically for robust, low-voltage bidirectional translation in safety-critical vehicle subsystems including ADAS, body electronics, and infotainment.
FAQ
What is the maximum supported data rate for 74AVC4T245QWBQBRQ1 in 1.2V-to-3.3V translation?
The 74AVC4T245QWBQBRQ1 supports up to 150Mbps when translating from 1.2V to 3.3V, as specified in the official datasheet switching characteristics tables. This rate is determined by propagation delay and setup/hold timing margins under worst-case voltage and temperature conditions, and applies to both A→B and B→A directions.
Does 74AVC4T245QWBQBRQ1 require external pull-up resistors on DIR or OE pins?
No - the 74AVC4T245QWBQBRQ1 does not require external pull-ups on DIR or OE inputs because its control inputs are CMOS-compatible and internally biased. However, tying OE to VCCA via a pull-up resistor is recommended during power-up/down to ensure predictable high-impedance state; the resistor value depends on the driver's sink capability.
Can 74AVC4T245QWBQBRQ1 operate with VCCA = 1.2V and VCCB = 3.3V simultaneously?
Yes - the 74AVC4T245QWBQBRQ1 is explicitly designed for asymmetric dual-rail operation. With VCCA = 1.2V and VCCB = 3.3V, it achieves 150Mbps translation while maintaining 4.6V I/O tolerance on both sides, enabling direct interface between ultra-low-power sensors and standard 3.3V peripherals.
How does the Ioff feature protect the 74AVC4T245QWBQBRQ1 during partial power-down?
The Ioff feature disables the output drivers when either VCCA or VCCB is at 0V, blocking current flow through the I/O structures. For the 74AVC4T245QWBQBRQ1, this limits backflow current to ±5μA (max) across the entire temperature range, preventing damage to powered rails and ensuring system-level fault containment in modular automotive architectures.
Is the thermal pad of 74AVC4T245QWBQBRQ1 required to be soldered to ground?
The exposed thermal pad of the 74AVC4T245QWBQBRQ1 must be electrically connected - either to PCB ground or left floating - but TI strongly recommends soldering it to a solid ground plane. Doing so reduces junction-to-board thermal resistance by ~30%, improves EMI performance, and maintains RθJA within the rated 80.8°C/W specification.
74AVC4T245QWBQBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.2 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Push-Pull, Tri-State
- Data Rate:
- 380Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-WFQFN Exposed Pad
74AVC4T245QWBQBRQ1 FAQ
1.How can I place an order for 74AVC4T245QWBQBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC4T245QWBQBRQ1 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 74AVC4T245QWBQBRQ1 reliable?
The price and inventory of 74AVC4T245QWBQBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T245QWBQBRQ1 is usually 5 days.
3.What payment methods are accepted for 74AVC4T245QWBQBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC4T245QWBQBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVC4T245QWBQBRQ1?
74AVC4T245QWBQBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC4T245QWBQBRQ1 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 74AVC4T245QWBQBRQ1?
For technical support, including 74AVC4T245QWBQBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T245QWBQBRQ1 requirements.
6.How does Aetrix verify that 74AVC4T245QWBQBRQ1 is sourced from the original manufacturer or authorized distributors?
All 74AVC4T245QWBQBRQ1 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 74AVC4T245QWBQBRQ1 meets industry standards.
7.What is the process for return or replacement of 74AVC4T245QWBQBRQ1?
All 74AVC4T245QWBQBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T245QWBQBRQ1, 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 74AVC4T245QWBQBRQ1 part is unused and in its original packaging.
Return procedure for 74AVC4T245QWBQBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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