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Texas Instruments CAVC8T245QRHLRQ1
- Part No.:
- CAVC8T245QRHLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
CAVC8T245QRHLRQ1.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:752
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Product details
Overview
CAVC8T245QRHLRQ1 from Texas Instruments is an automotive-grade 8-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.2 V–3.6 V domains, with configurable VCCA/VCCB rails, 3-state outputs, and AEC-Q100 Grade 1 qualification (–40°C to +125°C). It supports up to 320 Mbps data rate when both supplies ≥1.8 V and features Ioff and VCC isolation for robust partial-power-down operation in telematics and cluster systems.
For engineers reviewing the CAVC8T245QRHLRQ1 datasheet, CAVC8T245QRHLRQ1 pinout, CAVC8T245QRHLRQ1 application, or CAVC8T245QRHLRQ1 equivalent, key selection criteria include dual-rail supply flexibility (1.2–3.6 V per rail), 4.6-V I/O tolerance, DIR/OE control logic referenced to VCCA, thermal performance in RHL (VQFN-24), and automotive reliability validation including HBM ±2000 V and CDM ±750 V ESD ratings.
Technical Context
The CAVC8T245QRHLRQ1 implements asynchronous bidirectional data flow controlled by DIR (referenced to VCCA) and OE (also VCCA-referenced), allowing A→B or B→A transmission while isolating buses in 3-state mode. Its dual-rail architecture decouples A-port (VCCA-tracked) and B-port (VCCB-tracked) logic levels, enabling translation across 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V nodes without level-shifting circuitry.
VCC isolation ensures all I/Os enter high-impedance state if either VCCA or VCCB = GND, and Ioff circuitry actively disables outputs during power-down to prevent backflow current. Propagation delays range from 1.7 ns (tPHZ, OE→A, VCCA=3.3 V/VCCB=1.2 V) to 20.5 ns (tPZH, OE→A, VCCA=1.5 V/VCCB=3.3 V), with load-dependent variation confirmed across CL = 0–60 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.2 V to 3.6 V each - enables universal low-voltage translation between 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains without external biasing. |
| Max Data Rate | 320 Mbps (VCCA ≥ 1.8 V and VCCB ≥ 1.8 V) - supports high-speed interconnect in infotainment backplanes and ADAS sensor interfaces. |
| I/O Voltage Tolerance | 4.6 V - allows safe interfacing with higher-voltage legacy peripherals or transient-tolerant signaling without clamping diodes. |
| ESD Rating (HBM / CDM) | ±2000 V / ±750 V - meets AEC-Q100-002/011 requirements for automotive module robustness in harsh environments. |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for under-hood and dashboard-mounted applications including head units and digital clusters. |
| Propagation Delay (tPLH/tPHL) | As low as 2.3 ns (A→B, VCCA=3.3 V/VCCB=1.2 V) - ensures timing-critical signal integrity in real-time vehicle networks. |
| Static Current (ICCA + ICCB) | <25 µA over full temperature range - minimizes quiescent power in always-on automotive subsystems. |
Pinout & Package
RHL package is a 24-pin VQFN (5.5 mm × 3.5 mm) with exposed thermal pad, optimized for automotive PCB space constraints and thermal dissipation (RθJA = 36.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | I/O (A-port) | Bi-directional data lines referenced to VCCA; support 1.2–3.6 V logic levels and 4.6 V tolerance. |
| B1–B8 | I/O (B-port) | Bi-directional data lines referenced to VCCB; independent voltage domain enables true level translation. |
| DIR | Input | Direction control referenced to VCCA: HIGH = A→B, LOW = B→A; determines data path in active mode. |
| OE | Input | Output-enable referenced to VCCA: LOW = enabled, HIGH = 3-state; used for bus isolation during power sequencing. |
| VCCA | Power | Supplies A-port I/Os and control inputs (DIR/OE); defines VIH/VIL thresholds for control logic. |
| VCCB | Power | Supplies B-port I/Os only; fully independent of VCCA, enabling asymmetric voltage translation. |
| GND | Ground | Two dedicated pins (pins 12, 13) provide low-inductance return path; thermal pad must be connected to GND or left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Fully configurable dual-rail operation | Independent VCCA (1.2–3.6 V) and VCCB (1.2–3.6 V) enable any-to-any low-voltage translation without external components. |
| VCC isolation | Automatic high-impedance state on all I/Os if either VCCA or VCCB is at GND - prevents bus contention during power-up/down sequencing. |
| Ioff partial-power-down support | Blocks current backflow into powered-down rails, protecting downstream circuitry and meeting ISO 16750-2 load-dump immunity requirements. |
| 4.6-V tolerant I/Os | Allows direct connection to 3.3-V or 5-V legacy peripherals without series resistors or external clamps in mixed-voltage systems. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V and CDM ±750 V - suitable for safety-critical cockpit electronics. |
Applications
| Telematics Control Unit | Digital Instrument Cluster |
|---|---|
Use Scenario: Interfacing a 1.8-V microcontroller to a 3.3-V CAN transceiver and GPS module in a vehicle telematics gateway. IC Role / Device Role / Timing Role: Bidirectional level translator managing data flow between MCU UART/SPI and peripheral ICs across mismatched voltage domains. Use Value: Eliminates need for discrete level-shifters or voltage regulators, reducing BOM count and PCB area while maintaining 320 Mbps throughput for OTA firmware updates. |
Use Scenario: Connecting a 2.5-V graphics processor to 1.2-V display memory and 3.3-V touch controller in a digital dashboard. IC Role / Device Role / Timing Role: Voltage-domain bridge enabling synchronous pixel data transfer and touch interrupt signaling across three distinct supply rails. Use Value: Ensures glitch-free bus arbitration during cold-start and sleep/wake transitions via VCC isolation and Ioff, meeting ASIL-B functional safety timing constraints. |
| Automotive Head Unit | Navigation System Interface |
Use Scenario: Linking a 1.5-V audio DSP to 3.3-V USB PHY and 1.8-V SD card interface in an infotainment head unit. IC Role / Device Role / Timing Role: Configurable bus transceiver handling concurrent audio data, storage commands, and host communication with direction control. Use Value: Supports simultaneous multi-protocol operation (I²S, SDIO, USB) with sub-3 ns propagation delay, preserving audio sample timing and reducing jitter in playback paths. |
Use Scenario: Translating position data between a 1.2-V GNSS baseband processor and 2.5-V vehicle network controller in a navigation ECU. IC Role / Device Role / Timing Role: Low-latency bidirectional translator synchronizing NMEA messages and vehicle speed signals across voltage-isolated domains. Use Value: Enables deterministic 10.2 ns max tPLH (B→A, VCCA=3.3 V/VCCB=2.5 V) for real-time map rendering and lane-departure warning response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | Industrial-grade (non-automotive); lacks AEC-Q100 qualification, HBM/CDM ratings, and Grade 1 temperature range. | Not suitable for production automotive modules requiring OEM qualification; acceptable for prototyping or non-safety-critical test fixtures. | Select CAVC8T245QRHLRQ1 for production vehicles; use SN74AVC8T245RHLR only for lab evaluation where automotive compliance is not required. |
| TXB0108RGER | Auto-bidirectional (no DIR pin); lower max data rate (100 Mbps); different VCCIO/VCCA architecture limits voltage flexibility. | Requires redesign of control logic and may not meet timing budgets in high-speed infotainment backplanes. | Prefer CAVC8T245QRHLRQ1 when DIR-controlled directionality, >100 Mbps throughput, or 1.2–3.6 V dual-rail configurability is required. |
Compared with SN74AVC8T245RHLR and TXB0108RGER, the CAVC8T245QRHLRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 320 Mbps capability, explicit DIR control, and full 1.2–3.6 V per-rail operation-making it the only option qualified for safety-critical automotive data routing where timing, voltage flexibility, and reliability are simultaneously constrained.
Availability
CAVC8T245QRHLRQ1 is available at Aetrix Electronics and suitable for telematics gateways, digital instrument clusters, and automotive head units requiring stable component supply with guaranteed long-term automotive lifecycle support.
Supply support for CAVC8T245QRHLRQ1 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 automotive electronics, with decades of experience delivering high-reliability components for mission-critical systems.
The CAVC8T245QRHLRQ1 belongs to TI's AVC family of advanced voltage-translating transceivers, designed specifically for automotive infotainment, body electronics, and ADAS subsystems demanding robust level-shifting, low power, and AEC-Q100 compliance.
FAQ
What is the maximum operating temperature range for the CAVC8T245QRHLRQ1?
The CAVC8T245QRHLRQ1 is qualified to AEC-Q100 Grade 1 specifications, supporting continuous operation from –40°C to +125°C ambient temperature. This rating is validated across all electrical parameters in the official datasheet SCES785E and applies to both RHL (VQFN) and PW (TSSOP) package variants of the CAVC8T245QRHLRQ1.
Does the CAVC8T245QRHLRQ1 require external pull-up resistors on DIR or OE?
No external pull-up resistors are required on DIR or OE for normal operation of the CAVC8T245QRHLRQ1, as both inputs are CMOS-compatible with VCCA-referenced thresholds. However, to ensure defined high-impedance state during power-up, TI recommends tying OE to VCCA through a pullup resistor (value determined by driver sink capability) - this guidance is explicitly stated in section 3 of the CAVC8T245QRHLRQ1 datasheet.
Can the CAVC8T245QRHLRQ1 translate between 1.2 V and 3.3 V logic levels bidirectionally?
Yes, the CAVC8T245QRHLRQ1 supports true bidirectional voltage translation between 1.2 V and 3.3 V domains: VCCA can be set to 1.2 V (powering A-port and DIR/OE) while VCCB is set to 3.3 V (powering B-port), and vice versa. This capability is confirmed in the device description, recommended operating conditions, and switching characteristics tables of the CAVC8T245QRHLRQ1 datasheet.
What is the purpose of the thermal pad on the RHL package of the CAVC8T245QRHLRQ1?
The exposed thermal pad on the CAVC8T245QRHLRQ1's RHL (VQFN-24) package must be connected to a secondary GND plane or left electrically open - it is not internally connected to any signal or power net. Proper thermal pad soldering reduces junction-to-board thermal resistance (RθJB = 15.7°C/W), directly improving power dissipation capability and long-term reliability in automotive under-hood applications.
How does the VCC isolation feature function in the CAVC8T245QRHLRQ1?
The VCC isolation feature in the CAVC8T245QRHLRQ1 forces all I/O ports (A1–A8 and B1–B8) into high-impedance state whenever either VCCA or VCCB is driven to GND - regardless of DIR or OE states. This behavior is implemented at the silicon level and prevents bus contention during power sequencing, a critical requirement verified in AEC-Q100 stress testing for the CAVC8T245QRHLRQ1.
CAVC8T245QRHLRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (5.5x3.5)
CAVC8T245QRHLRQ1 FAQ
1.How can I place an order for CAVC8T245QRHLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAVC8T245QRHLRQ1 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 CAVC8T245QRHLRQ1 reliable?
The price and inventory of CAVC8T245QRHLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAVC8T245QRHLRQ1 is usually 5 days.
3.What payment methods are accepted for CAVC8T245QRHLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAVC8T245QRHLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAVC8T245QRHLRQ1?
CAVC8T245QRHLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAVC8T245QRHLRQ1 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 CAVC8T245QRHLRQ1?
For technical support, including CAVC8T245QRHLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAVC8T245QRHLRQ1 requirements.
6.How does Aetrix verify that CAVC8T245QRHLRQ1 is sourced from the original manufacturer or authorized distributors?
All CAVC8T245QRHLRQ1 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 CAVC8T245QRHLRQ1 meets industry standards.
7.What is the process for return or replacement of CAVC8T245QRHLRQ1?
All CAVC8T245QRHLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAVC8T245QRHLRQ1, 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 CAVC8T245QRHLRQ1 part is unused and in its original packaging.
Return procedure for CAVC8T245QRHLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CAVC8T245QRHLRQ1 Tags
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