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Texas Instruments CAXC8T245QRHLRQ1
- Part No.:
- CAXC8T245QRHLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
CAXC8T245QRHLRQ1.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
CAXC8T245QRHLRQ1 from Texas Instruments is an AEC-Q100 qualified 8-bit dual-supply bus transceiver enabling bidirectional voltage translation between 0.65V–3.6V domains on A and B ports, supporting up to 380Mbps (1.8V→3.3V), with independent DIR1/DIR2 control for simultaneous up/down translation in automotive infotainment and ADAS sensor interfaces.
For engineers reviewing the CAXC8T245QRHLRQ1 datasheet, CAXC8T245QRHLRQ1 pinout, CAXC8T245QRHLRQ1 application, or CAXC8T245QRHLRQ1 equivalent, this device delivers configurable rail-to-rail level shifting, VCC isolation, partial power-down Ioff protection, and wettable flank QFN packaging for automated optical inspection in safety-critical automotive PCBs.
Technical Context
The CAXC8T245QRHLRQ1 implements a fully configurable dual-rail architecture where A-port I/Os (A1–A8) track VCCA and B-port I/Os (B1–B8) track VCCB, both independently adjustable from 0.65V to 3.6V. Control inputs DIR1, DIR2, and OE are referenced solely to VCCA.
Its VCC isolation feature disables all outputs when either VCCA or VCCB falls below 100mV, and its Ioff circuitry limits backflow current during partial power-down-enabling safe hot-insertion and system-level power sequencing in battery management and camera fusion modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 0.65V to 3.6V per rail - enables interface between sub-1V logic (e.g., AI accelerators) and legacy 1.8V/2.5V/3.3V peripherals |
| Max Data Rate | 380Mbps at 1.8V→3.3V translation - supports high-speed video and sensor data links in ADAS front camera systems |
| Operating Temp | –40°C to +125°C - qualified for under-hood and display module environments per AEC-Q100 Grade 1 |
| VCC Isolation Threshold | <100mV on either rail - forces all I/Os into high-Z to prevent bus contention during power sequencing |
| Ioff Current (per port) | ±12µA max at 125°C - blocks damaging backflow when one side is powered down while the other remains active |
| ESD Rating (HBM) | ±8kV - meets automotive ESD robustness requirements for infotainment head unit board-level integration |
| Propagation Delay (min/max) | 0.5ns / 8ns (A→B, VCCA=1.8V, VCCB=3.3V, TA=125°C) - ensures timing margin for real-time sensor data forwarding |
Pinout & Package
Package: 24-pin VQFN (RHL), 5.5mm × 3.5mm, wettable flank, thermally enhanced with exposed thermal pad (recommended grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply reference | Bias source for A-side I/Os and control inputs (DIR1, DIR2, OE); sets VIH/VIL thresholds |
| DIR1 (Pin 2) | Direction control 1 | Controls A→B data flow when high; referenced to VCCA; tie to GND for SN74AVC8T245-Q1 compatibility |
| A1–A8 (Pins 3–10) | A-port bidirectional I/Os | Track VCCA voltage; support 0.65V–3.6V logic levels; 5.7pF typical I/O capacitance |
| DIR2 (Pin 11) | Direction control 2 | Enables independent B→A flow control; allows simultaneous bidirectional translation across same bus pair |
| GND (Pins 12,13) | Ground reference | Dual ground pins reduce impedance and improve noise immunity in high-speed automotive routing |
| B8–B1 (Pins 14–21) | B-port bidirectional I/Os | Track VCCB voltage; electrically isolated from A-side; support independent voltage domain operation |
| OE (Pin 22) | Output enable | Active-low referenced to VCCA; drives all A/B outputs to high-Z when high; pullup to VCCA required for power-up safety |
| VCCB (Pins 23,24) | B-port supply reference | Bias source for B-side I/Os only; decoupling required near pins to maintain signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | VCCA and VCCB each configurable 0.65V–3.6V - eliminates need for external LDOs when interfacing heterogeneous SoCs and sensors |
| Two-direction-control inputs | DIR1 and DIR2 allow concurrent A→B and B→A data paths - enables full-duplex bridging without external logic |
| VCC isolation | Automatic high-Z output disable if either VCCA or VCCB <100mV - prevents bus lockup during asymmetric power sequencing |
| Partial power-down (Ioff) | Sub-12µA leakage at 125°C when one rail is unpowered - protects powered domains from reverse current damage |
| Wettable flank QFN | RHL package with side-wettable leads - enables automated AOI for solder joint reliability validation in automotive manufacturing |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
Use Scenario: Interfacing low-voltage image signal processor (0.8V core) with 1.8V MIPI CSI-2 serializer and 3.3V display controller. IC Role / Device Role / Timing Role: Voltage translator and bus isolator enabling asynchronous domain crossing with sub-10ns propagation delay. Use Value: Eliminates level-shifter discrete count while maintaining AEC-Q100 compliance and thermal stability at 125°C ambient. | Use Scenario: Bridging 0.7V automotive radar preprocessor outputs to 2.5V Ethernet PHY interface in camera fusion ECU. IC Role / Device Role / Timing Role: Bidirectional data conduit with independent DIR control for time-synchronized sensor data aggregation. Use Value: Supports 380Mbps burst transfer during frame capture windows without timing skew or bus contention. |
| ADAS Sensor Fusion ECU | HEV Battery Management System |
Use Scenario: Aggregating CAN FD, LIN, and SPI sensor data from mixed-voltage nodes (0.9V MCU, 1.2V ADC, 3.3V isolators) onto a unified 1.8V internal bus. IC Role / Device Role / Timing Role: Multi-domain bus transceiver with VCC isolation ensuring fault containment during partial power loss. Use Value: Enables single-chip voltage translation across four distinct supply domains without external biasing or sequencing logic. | Use Scenario: Isolating 1.5V battery monitor IC communications from 3.3V microcontroller in high-noise 400V traction battery environment. IC Role / Device Role / Timing Role: High-reliability level shifter with ±8kV HBM ESD rating and Ioff protection against cell-balancing transient backfeed. Use Value: Prevents latch-up and data corruption during rapid charge/discharge cycles where rail collapse is common. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245-Q1 | Limited to 1.2V–3.6V VCC range; no sub-1V support; single DIR pin; no VCC isolation | Suitable only for legacy 1.2V+ systems; lacks simultaneous bidirectional control and failsafe isolation | Select when cost sensitivity outweighs future-proofing for ultra-low-voltage nodes and safety-critical isolation |
| TXS0108E-Q1 | Auto-direction sensing (no DIR pins); lower max speed (100Mbps); supports 1.2V–3.6V only; no Ioff | Best for simple push-pull I²C/SPI translation; unsuitable for high-speed parallel buses or asymmetric power-down scenarios | Choose only for low-pin-count, low-bandwidth protocols where direction detection simplifies layout - not for 8-bit parallel ADAS data paths |
Compared with SN74AVC8T245-Q1 and TXS0108E-Q1, the CAXC8T245QRHLRQ1 uniquely supports sub-1V operation, dual DIR control for true full-duplex translation, and hardware-enforced VCC isolation - making it the sole option for next-gen automotive SoC interconnect requiring AEC-Q100 Grade 1 compliance at 125°C with zero-bus-contention guarantees.
Availability
CAXC8T245QRHLRQ1 is available at Aetrix Electronics and suitable for automotive infotainment head units, ADAS front camera modules, and HEV battery management systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for CAXC8T245QRHLRQ1 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 and embedded processing solutions for automotive, industrial, and personal electronics markets.
The AXC family targets high-speed, low-voltage automotive bus translation - designed specifically for seamless interoperability between advanced sub-1V processors and legacy peripheral interfaces under AEC-Q100 stress conditions.
FAQ
What is the minimum operating voltage supported by the CAXC8T245QRHLRQ1 on each supply rail?
The CAXC8T245QRHLRQ1 supports a minimum supply voltage of 0.65V on both VCCA and VCCB rails, enabling direct interface with sub-1V logic cores such as those found in modern automotive AI accelerators and ultra-low-power MCUs. This capability is confirmed in Section 5.3 (Recommended Operating Conditions) of the official datasheet, where 0.65V is specified as the absolute lower bound for stable operation across –40°C to +125°C.
Does the CAXC8T245QRHLRQ1 support true bidirectional data flow simultaneously on the same bus pair?
Yes, the CAXC8T245QRHLRQ1 supports simultaneous bidirectional translation via independent DIR1 and DIR2 inputs - allowing A→B and B→A data paths to be active concurrently. This is explicitly documented in the Features section and functional description, distinguishing it from single-DIR transceivers like SN74AVC8T245-Q1. The CAXC8T245QRHLRQ1 uses separate control signals to avoid bus contention and enable full-duplex bridging in sensor fusion ECUs.
How does the VCC isolation feature behave when VCCA drops below 100mV while VCCB remains powered?
When VCCA falls below 100mV, the CAXC8T245QRHLRQ1 automatically places all A1–A8 and B1–B8 outputs into a high-impedance state regardless of DIR or OE states - effectively isolating both buses. This behavior is guaranteed per datasheet Section 3 and prevents backdrive or contention in asymmetric power-down scenarios common in HEV battery management systems. The threshold is fixed and does not scale with VCCB.
Is the CAXC8T245QRHLRQ1 pin-compatible with the SN74AVC8T245-Q1 in the same RHL package?
No, the CAXC8T245QRHLRQ1 is not pin-compatible with SN74AVC8T245-Q1 in the RHL package. While both use 24-pin VQFN footprints, the CAXC8T245QRHLRQ1 adds dedicated DIR2 (Pin 11) and duplicates VCCB (Pins 23,24), whereas SN74AVC8T245-Q1 uses Pin 11 for GND and has only one VCCB pin. Layout reuse requires redesign; migration must account for signal reassignment and decoupling adjustments.
What thermal performance can be expected from the CAXC8T245QRHLRQ1 in a 2-layer automotive PCB?
In a standard 2-layer automotive PCB with 1oz copper and minimal thermal vias, the CAXC8T245QRHLRQ1 exhibits a junction-to-board thermal resistance (RθJB) of 13.8°C/W per datasheet Section 5.4 - enabling ≤1.2W total power dissipation before exceeding 125°C junction limit at 85°C ambient. For sustained 380Mbps operation, TI recommends ≥4 thermal vias under the exposed pad and local 2oz copper pour to maintain reliability in under-dash environments.
CAXC8T245QRHLRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- 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:
- 0.65V ~ 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)
CAXC8T245QRHLRQ1 FAQ
1.How can I place an order for CAXC8T245QRHLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAXC8T245QRHLRQ1 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 CAXC8T245QRHLRQ1 reliable?
The price and inventory of CAXC8T245QRHLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAXC8T245QRHLRQ1 is usually 5 days.
3.What payment methods are accepted for CAXC8T245QRHLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAXC8T245QRHLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAXC8T245QRHLRQ1?
CAXC8T245QRHLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAXC8T245QRHLRQ1 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 CAXC8T245QRHLRQ1?
For technical support, including CAXC8T245QRHLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAXC8T245QRHLRQ1 requirements.
6.How does Aetrix verify that CAXC8T245QRHLRQ1 is sourced from the original manufacturer or authorized distributors?
All CAXC8T245QRHLRQ1 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 CAXC8T245QRHLRQ1 meets industry standards.
7.What is the process for return or replacement of CAXC8T245QRHLRQ1?
All CAXC8T245QRHLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAXC8T245QRHLRQ1, 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 CAXC8T245QRHLRQ1 part is unused and in its original packaging.
Return procedure for CAXC8T245QRHLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CAXC8T245QRHLRQ1 Tags
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