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Texas Instruments CAXC4T245QWBQBRQ1
- Part No.:
- CAXC4T245QWBQBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
CAXC4T245QWBQBRQ1.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16WQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CAXC4T245QWBQBRQ1 from Texas Instruments is an AEC-Q100 qualified 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 0.65V and 3.6V rails, with independent direction control per channel, tri-state outputs, and VCC isolation. It supports up to 380 Mbps (1.8V→3.3V), operates from –40°C to +125°C, and is used in automotive ADAS front camera data interfaces.
For engineers reviewing the CAXC4T245QWBQBRQ1 datasheet, CAXC4T245QWBQBRQ1 pinout, CAXC4T245QWBQBRQ1 application, or CAXC4T245QWBQBRQ1 equivalent, key selection criteria include dual-rail configurability, glitch-free power sequencing, Ioff partial-power-down support, and wettable flank WQFN-16 (WBQB) packaging for automotive-grade solder joint inspection.
Technical Context
The CAXC4T245QWBQBRQ1 implements two independent 2-bit transceiver channels (1A↔1B and 2A↔2B), each with dedicated direction (xDIR) and output-enable (xOE) inputs referenced to VCCA. Its fully configurable dual-rail architecture allows asymmetric operation-e.g., VCCA = 1.2V driving VCCB = 3.3V-without external level-shifting components.
VCC isolation disables all I/Os when either VCCA or VCCB drops below 100 mV, preventing back-drive during power sequencing. Glitch-free startup ensures robust behavior during staggered rail ramp-up, and Ioff circuitry limits current flow during partial power-down, meeting JESD78 Class II latch-up requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 0.65V to 3.6V per rail - enables direct interface between sub-1V logic (e.g., LPDDR4 I/O) and 3.3V peripherals without external translators |
| Max Data Rate | 380 Mbps (1.8V→3.3V) - supports high-speed serial links in infotainment and camera sensor interfaces |
| Propagation Delay (tpd) | As low as 4 ns (VCCA=3.3V, VCCB=3.3V, TA=25°C) - ensures timing-critical signal integrity in real-time ADAS processing paths |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and cabin-mounted automotive ECUs per AEC-Q100 Grade 1 |
| Ioff Current | ±8 µA max (TA=125°C) - prevents leakage-induced bus contention during system sleep modes |
| VCC Isolation Threshold | <100 mV on either rail - forces high-impedance I/O state to avoid back-powering powered-down domains |
| ESD Rating | ±8 kV HBM, ±1 kV CDM - exceeds automotive board-level ESD immunity requirements |
Pinout & Package
Package: 16-pin wettable flank WQFN (WBQB), 3.5 mm × 2.5 mm, 0.5 mm pitch, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply reference | Bias source for all A-side I/Os and control inputs (1DIR, 2DIR, 1OE, 2OE); sets input thresholds and output drive strength for A ports |
| VCCB | B-port supply reference | Bias source for all B-side I/Os; independent of VCCA, enabling true dual-voltage domain translation |
| 1A1, 1A2, 2A1, 2A2 | A-side bidirectional data terminals | I/Os referenced to VCCA; direction determined by 1DIR/2DIR; tolerate voltages up to VCCA + 0.2V in active state |
| 1B1, 1B2, 2B1, 2B2 | B-side bidirectional data terminals | I/Os referenced to VCCB; electrically isolated from A-side except through transceiver logic; tolerate up to VCCB + 0.2V |
| 1DIR, 2DIR | Channel direction control | Active-high inputs referenced to VCCA; control data flow direction independently per 2-bit channel (A→B or B→A) |
| 1OE, 2OE | Channel output enable | Active-low inputs referenced to VCCA; disable respective channel outputs into high-impedance state for bus isolation |
| GND | Ground reference | Common return for both power domains; two pins provided for low-inductance grounding and thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Each port tracks its own supply (VCCA/VCCB), supporting 0.65V–3.6V combinations - eliminates need for discrete level shifters in mixed-voltage SoC-to-peripheral interconnects |
| Independent channel control | Separate DIR and OE pins per 2-bit channel - enables simultaneous up/down translation (e.g., A→B on Channel 1, B→A on Channel 2) for full-duplex protocols |
| VCC isolation | Automatic high-Z assertion if either VCCA or VCCB falls below 100 mV - prevents cross-rail current injection during brown-out or hot-plug events |
| Glitch-free power sequencing | No defined power-up order required for VCCA/VCCB - simplifies power management design and avoids initialization faults in multi-rail systems |
| Wettable flank package (WBQB) | Side-wettable leads enable automated optical inspection (AOI) of solder joints - meets IPC-A-610 automotive assembly quality requirements |
Applications
| Infotainment Head Unit | ADAS Front Camera Interface |
|---|---|
|
Use Scenario: Interfacing a 1.8V application processor to a 3.3V display timing controller and touch controller in a vehicle head unit. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing parallel RGB and I²C buses between mismatched voltage domains. Use Value: Eliminates four discrete level shifters, reduces BOM count and PCB area while maintaining <4 ns propagation delay for pixel clock alignment. |
Use Scenario: Connecting a 1.2V MIPI CSI-2 image sensor to a 3.3V automotive Ethernet gateway MCU in a front-facing ADAS camera module. IC Role / Device Role / Timing Role: Translating low-voltage sensor data lanes and control signals (RESET, STANDBY) to higher-voltage host domain. Use Value: Supports 380 Mbps data rate at 1.8V→3.3V translation, enabling full-resolution 1080p@30fps video transport without timing skew. |
| Telematics Control Unit (TCU) | Hybrid/Electric Vehicle Battery Management System |
|
Use Scenario: Isolating CAN FD transceiver I/O (3.3V) from a 1.1V safety microcontroller in a telematics control unit. IC Role / Device Role / Timing Role: Level-shifting and bus-isolating critical control lines (TXEN, SLEEP) while maintaining fail-safe high-Z state during MCU reset. Use Value: Ioff and VCC isolation features prevent back-driving the 1.1V domain during TCU power cycling, ensuring ASIL-B compliance. |
Use Scenario: Interfacing a 2.5V battery cell monitor IC (e.g., BQ796xx) to a 1.8V main system MCU in a high-voltage traction battery pack. IC Role / Device Role / Timing Role: Translating UART and GPIO status signals across isolated voltage domains in a thermally constrained module. Use Value: –40°C to +125°C operation and 72.9°C/W junction-to-board thermal resistance ensure reliability in under-battery-pack environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LXC4T245PWR | Non-automotive grade (no AEC-Q100), same WBQB package and pinout, identical dual-rail range (0.65V–3.6V), but rated only to 105°C | Targeted at industrial/commercial designs where automotive qualification is not required | Select for cost-sensitive non-automotive systems needing identical functionality without AEC-Q100 validation overhead |
| SN74AXC4T245QPWRQ1 | Same AEC-Q100 qualification and electrical specs, but in 16-pin TSSOP (PW) package (5 mm × 6.4 mm), no wettable flanks | Suitable for legacy PCBs with TSSOP footprints or where AOI of solder joints is not mandated | Choose when board layout rework for WQFN is impractical, accepting larger footprint and no side-wettable lead inspection capability |
Compared with SN74LXC4T245PWR and SN74AXC4T245QPWRQ1, the CAXC4T245QWBQBRQ1 uniquely combines AEC-Q100 Grade 1 qualification, wettable flank WQFN packaging for automotive process control, and guaranteed 125°C operation - making it the only option qualified for safety-critical, thermally demanding ADAS sensor hubs.
Availability
CAXC4T245QWBQBRQ1 is available at Aetrix Electronics and suitable for automotive infotainment head units, ADAS front camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CAXC4T245QWBQBRQ1 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 specializing in analog, embedded processing, and automotive electronics, with decades of leadership in high-reliability interface solutions.
The SN74AXC4T245-Q1 product line delivers AEC-Q100 qualified, low-voltage dual-supply transceivers designed specifically for voltage-domain bridging in next-generation automotive ADAS, infotainment, and electrification systems.
FAQ
What is the maximum supported data rate for CAXC4T245QWBQBRQ1 in automotive applications?
The CAXC4T245QWBQBRQ1 supports up to 380 Mbps when translating from 1.8V to 3.3V under recommended operating conditions (–40°C to +125°C). This performance is validated per TI's SCES905F datasheet and enables use in high-bandwidth ADAS camera sensor interfaces and infotainment display links. Actual achievable rate depends on load capacitance, trace routing, and supply stability.
Does CAXC4T245QWBQBRQ1 support asymmetric voltage translation, such as 0.8V ↔ 2.5V?
Yes, the CAXC4T245QWBQBRQ1 fully supports asymmetric dual-rail operation: VCCA may be set to 0.8V while VCCB is set to 2.5V (or any combination within 0.65V–3.6V per rail). The device's architecture ensures correct logic thresholds and output drive strength on each side, as confirmed in Sections 5.3 and 5.11 of the TI datasheet.
How does the VCC isolation feature function in CAXC4T245QWBQBRQ1?
The VCC isolation feature in the CAXC4T245QWBQBRQ1 disables all I/O outputs and forces them into high-impedance state whenever either VCCA or VCCB drops below 100 mV. This prevents back-current flow between powered and unpowered domains during power sequencing or fault conditions, a critical requirement for ISO 26262-compliant automotive subsystems.
Is CAXC4T245QWBQBRQ1 pin-compatible with other members of the SN74AXC4T245-Q1 family?
Yes, the CAXC4T245QWBQBRQ1 shares identical pinout and functionality with all SN74AXC4T245-Q1 variants (e.g., PW, RSV packages). Pin mapping for VCCA, VCCB, 1A1–2B2, 1DIR–2OE, and GND is consistent across packages, enabling drop-in replacement when changing package types without PCB redesign.
What thermal performance can be expected from the WBQB package of CAXC4T245QWBQBRQ1?
The CAXC4T245QWBQBRQ1 in WBQB package has a junction-to-board thermal resistance (RθJB) of 41.9°C/W and junction-to-ambient (RθJA) of 72.9°C/W, per TI's SCES905F datasheet. With proper PCB copper pour under the thermal pad, it sustains continuous operation at 125°C ambient in automotive under-dash environments without derating.
CAXC4T245QWBQBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 0.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (2.5x3.5)
CAXC4T245QWBQBRQ1 FAQ
1.How can I place an order for CAXC4T245QWBQBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAXC4T245QWBQBRQ1 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 CAXC4T245QWBQBRQ1 reliable?
The price and inventory of CAXC4T245QWBQBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAXC4T245QWBQBRQ1 is usually 5 days.
3.What payment methods are accepted for CAXC4T245QWBQBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAXC4T245QWBQBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAXC4T245QWBQBRQ1?
CAXC4T245QWBQBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAXC4T245QWBQBRQ1 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 CAXC4T245QWBQBRQ1?
For technical support, including CAXC4T245QWBQBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAXC4T245QWBQBRQ1 requirements.
6.How does Aetrix verify that CAXC4T245QWBQBRQ1 is sourced from the original manufacturer or authorized distributors?
All CAXC4T245QWBQBRQ1 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 CAXC4T245QWBQBRQ1 meets industry standards.
7.What is the process for return or replacement of CAXC4T245QWBQBRQ1?
All CAXC4T245QWBQBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAXC4T245QWBQBRQ1, 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 CAXC4T245QWBQBRQ1 part is unused and in its original packaging.
Return procedure for CAXC4T245QWBQBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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