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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments CAXC2T245QRSWRQ1

Name: CAXC2T245QRSWRQ1
Brand: Texas Instruments
SKU: CAXC2T245QRSWRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CAXC2T245QRSWRQ1

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 10-UFQFN

Datasheet:: CAXC2T245QRSWRQ1.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 10UQFN

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Product details

Overview

CAXC2T245QRSWRQ1 from Texas Instruments is an automotive-grade 2-bit dual-supply bus transceiver enabling bidirectional voltage translation between independent A and B ports, with configurable VCCA (0.65–3.6 V) and VCCB (0.65–3.6 V) rails, DIR-controlled data direction per channel, tri-state outputs, and operation from –40°C to +125°C - deployed in ADAS front camera interfaces requiring level-shifting between 1.2-V sensor logic and 3.3-V processor I/O.

For engineers reviewing the CAXC2T245QRSWRQ1 datasheet, CAXC2T245QRSWRQ1 pinout, CAXC2T245QRSWRQ1 application, or CAXC2T245QRSWRQ1 equivalent, key selection criteria include dual-rail voltage translation capability, AEC-Q100 qualification, glitch-free power sequencing, VCC isolation behavior, and 10-pin UQFN package compatibility with high-density automotive PCB layouts.

Technical Context

The CAXC2T245QRSWRQ1 implements two independent, noninverting transceiver channels (A1↔B1, A2↔B2), each with dedicated DIRx control referenced to VCCA and shared OE enable referenced to VCCA. Directional data flow is determined solely by DIRx logic state, not supply rail dominance.

Its dual-supply architecture supports asynchronous voltage translation across wide rail combinations - e.g., 0.8-V A-port ↔ 2.5-V B-port - while maintaining Ioff protection (<±8 µA at 125°C) and VCC isolation (high-impedance I/O when either VCCA or VCCB <100 mV), critical for mixed-voltage domain power sequencing in automotive ECUs.

Key Specifications

Parameter	Value and Actual Design Meaning
VCCA / VCCB Range	0.65 V to 3.6 V each - enables direct interface between sub-1-V logic (e.g., LPDDR4 I/O) and 3.3-V microcontrollers without external level shifters.
Operating Temperature	–40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and ADAS sensor module deployment.
Propagation Delay (tpd)	As low as 4 ns (A→B, VCCA=3.3 V, VCCB=3.3 V, TA=25°C) - supports >100 MHz data rates in high-speed serial sideband communication.
Ioff Current	≤±8 µA at 125°C - prevents back-drive current during partial power-down, protecting powered-down subsystems in multi-rail automotive domains.
VCC Isolation Threshold	Both I/O ports enter high-impedance state if either VCCA or VCCB falls below 100 mV - eliminates leakage paths during brown-out or staged power-up sequences.
ESD Protection	±8000 V HBM, ±1000 V CDM - exceeds automotive ESD robustness requirements for infotainment and camera module integration.

Pinout & Package

Package: 10-pin UQFN (RSW), 1.80 mm × 1.40 mm, 0.4-mm pitch, wettable flank - optimized for automated optical inspection (AOI) and thermal performance in space-constrained automotive modules.

Pin/Terminal	Circuit Role	Design Meaning
A1	Data I/O (Port A, Channel 1)	Bi-directional signal referenced to VCCA; output level tracks VCCA; input threshold scales with VCCA.
A2	Data I/O (Port A, Channel 2)	Bi-directional signal referenced to VCCA; functionally identical to A1 but independently controlled by DIR2.
DIR1	Direction Control (Channel 1)	Logic input referenced to VCCA; high = A1→B1, low = B1→A1; no internal pull-up/down.
DIR2	Direction Control (Channel 2)	Logic input referenced to VCCA; high = A2→B2, low = B2→A2; independent of DIR1.
OE	Output Enable	Active-high enable referenced to VCCA; drives all four I/Os (A1/A2/B1/B2) into high-impedance when low.
B1	Data I/O (Port B, Channel 1)	Bi-directional signal referenced to VCCB; output level tracks VCCB; input threshold scales with VCCB.
B2	Data I/O (Port B, Channel 2)	Bi-directional signal referenced to VCCB; functionally identical to B1 but independently controlled by DIR2.
VCCA	Supply A	Power rail for Port A and control logic (DIR1/DIR2/OE); defines input thresholds and output drive strength for A-side signals.
VCCB	Supply B	Power rail for Port B; defines output levels and input thresholds for B-side signals; electrically isolated from VCCA.
GND	Ground	Common reference for both supplies and all I/Os; must be low-impedance connection to avoid ground bounce in high-speed switching.

Key Features

Feature	Design Value
Dual-rail voltage translation	Independent VCCA/VCCB rails (0.65–3.6 V) allow simultaneous interfacing of disparate logic families - e.g., 1.2-V MIPI D-PHY transmitter to 2.8-V image signal processor.
Glitch-free power sequencing	No power-on reset or initialization required; functional operation guaranteed regardless of VCCA/VCCB ramp order - eliminates need for external sequencing controllers.
VCC isolation	Automatic high-Z on all I/Os when either VCCA or VCCB drops below 100 mV - prevents contention and back-powering during fault conditions or sleep-mode transitions.
AEC-Q100 Grade 1 qualification	Validated for automotive applications up to +125°C ambient; includes HTOL, TC, ESD, and latch-up testing per JESD22 and AEC standards.
Low dynamic power	Typical power dissipation capacitance of 2.1 pF (A→B enabled) and 0.9 pF (B→A disabled) minimizes switching current in battery-sensitive ADAS vision systems.

Applications

ADAS Front Camera Interface	Infotainment Head Unit
Use Scenario: Interfacing a 1.2-V MIPI CSI-2 image sensor to a 3.3-V application processor within a compact camera module. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing clock/data lanes between mismatched voltage domains while preserving signal integrity and timing margins. Use Value: Eliminates discrete level-shifter arrays, reduces BOM count by 4+ components, and maintains <5-ns propagation skew across differential pairs.	Use Scenario: Connecting a 1.8-V touch controller ASIC to a 3.3-V display interface MCU in a center-stack infotainment system. IC Role / Device Role / Timing Role: Dual-channel level shifter enabling I²C/SPI communication with independent direction control per channel for flexible firmware-driven bus arbitration. Use Value: Supports hot-plug detection via OE-controlled tri-state, avoids bus contention during controller reset, and meets <100-ns timing budget for touch response latency.
HEV/EV Battery Management	Automotive Gateway ECU
Use Scenario: Isolating 0.8-V digital isolator outputs from a 2.5-V microcontroller in a high-voltage battery monitoring unit. IC Role / Device Role / Timing Role: Voltage-translating buffer providing Ioff protection and VCC isolation to prevent back-current injection during cell-sensing IC power cycling. Use Value: Enables safe partial power-down of sensor nodes without disrupting gateway MCU operation; validated for 1000+ thermal cycles at 125°C.	Use Scenario: Bridging CAN FD physical layer transceivers (3.3-V I/O) with a 1.1-V safety-critical ASIL-B microcontroller core in a multi-domain automotive gateway. IC Role / Device Role / Timing Role: Level-shifting interface ensuring signal compatibility between safety and non-safety domains while meeting ISO 11898-2 timing constraints. Use Value: Maintains <15-ns inter-channel skew across CAN FD data/clock lines, supporting 5 Mbps operation with <1% duty-cycle distortion.

ADAS Front Camera Interface

Infotainment Head Unit

Use Scenario: Interfacing a 1.2-V MIPI CSI-2 image sensor to a 3.3-V application processor within a compact camera module.

IC Role / Device Role / Timing Role: Bidirectional voltage translator managing clock/data lanes between mismatched voltage domains while preserving signal integrity and timing margins.

Use Value: Eliminates discrete level-shifter arrays, reduces BOM count by 4+ components, and maintains <5-ns propagation skew across differential pairs.

Use Scenario: Connecting a 1.8-V touch controller ASIC to a 3.3-V display interface MCU in a center-stack infotainment system.

IC Role / Device Role / Timing Role: Dual-channel level shifter enabling I²C/SPI communication with independent direction control per channel for flexible firmware-driven bus arbitration.

Use Value: Supports hot-plug detection via OE-controlled tri-state, avoids bus contention during controller reset, and meets <100-ns timing budget for touch response latency.

HEV/EV Battery Management

Automotive Gateway ECU

Use Scenario: Isolating 0.8-V digital isolator outputs from a 2.5-V microcontroller in a high-voltage battery monitoring unit.

IC Role / Device Role / Timing Role: Voltage-translating buffer providing Ioff protection and VCC isolation to prevent back-current injection during cell-sensing IC power cycling.

Use Value: Enables safe partial power-down of sensor nodes without disrupting gateway MCU operation; validated for 1000+ thermal cycles at 125°C.

Use Scenario: Bridging CAN FD physical layer transceivers (3.3-V I/O) with a 1.1-V safety-critical ASIL-B microcontroller core in a multi-domain automotive gateway.

IC Role / Device Role / Timing Role: Level-shifting interface ensuring signal compatibility between safety and non-safety domains while meeting ISO 11898-2 timing constraints.

Use Value: Maintains <15-ns inter-channel skew across CAN FD data/clock lines, supporting 5 Mbps operation with <1% duty-cycle distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LXC2T245QPWRQ1	Lower static current (ICCA+ICCB = 12 µA typ vs. 23 µA), same 10-pin UQFN package, identical AEC-Q100 Grade 1 rating, but max VCCA/VCCB = 3.6 V only (no 4.2-V absolute max).	Preferred for ultra-low-power always-on domains (e.g., vehicle wake-up logic) where sub-µA quiescent current is prioritized over absolute max ratings.	Select when minimizing standby power dominates over transient overvoltage margin; verify layout compatibility with identical RSW footprint.
TXS0202RTWR	Auto-direction sensing (no DIR pins), open-drain B-port outputs, lower max data rate (100 Mbps vs. 380 Mbps), same 10-pin UQFN, AEC-Q100 qualified.	Suitable for push-pull-to-open-drain protocol bridging (e.g., I²C expansion), but lacks DIR-controlled synchronous bidirectional transfer needed for parallel bus applications.	Choose only for I²C/SMBus extension; avoid for parallel data buses requiring deterministic direction control and full drive-strength translation.

Compared with SN74LXC2T245QPWRQ1, CAXC2T245QRSWRQ1 offers higher absolute max voltage tolerance (4.2 V) and superior high-speed performance (380 Mbps), while TXS0202RTWR trades direction control for automatic sensing - making CAXC2T245QRSWRQ1 the only option supporting high-bandwidth, DIR-governed parallel bus translation in AEC-Q100 systems.

Availability

CAXC2T245QRSWRQ1 is available at Aetrix Electronics and suitable for ADAS front camera interfaces, infotainment head units, and HEV/EV battery management systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.

Supply support for CAXC2T245QRSWRQ1 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 automotive qualification expertise and broad portfolio coverage from sensors to power management.

The AXC family targets high-speed, low-voltage bidirectional translation in automotive and industrial systems, designed specifically to replace legacy AVC and LVC devices with enhanced voltage range, ESD robustness, and power sequencing resilience.

FAQ

What is the maximum data rate supported by the CAXC2T245QRSWRQ1?

The CAXC2T245QRSWRQ1 supports up to 380 Mbps when translating between 1.8-V and 3.3-V rails under specified conditions (TA = –40°C to +125°C). This is measured as the maximum toggle rate achievable while maintaining valid setup/hold timing margins and output voltage compliance per JEDEC standards. Actual system-level throughput depends on PCB layout, termination, and load capacitance - CAXC2T245QRSWRQ1 datasheet Table 6.11 provides propagation delay (tpd) down to 4 ns for 3.3-V ↔ 3.3-V operation, enabling >100 MHz clocked parallel interfaces.

Does the CAXC2T245QRSWRQ1 require external pull-up resistors on DIR or OE pins?

No, the CAXC2T245QRSWRQ1 does not integrate internal pull-up or pull-down resistors on DIR1, DIR2, or OE pins. These inputs are CMOS-compatible and must be actively driven to a defined logic level (VCCA or GND) to ensure predictable channel direction and output enable state. Leaving them floating may cause metastability, unintended data flow, or increased power consumption due to input leakage paths. TI recommends tying unused DIRx pins directly to VCCA or GND using short traces to minimize noise coupling.

How does VCC isolation work on the CAXC2T245QRSWRQ1, and what triggers it?

VCC isolation on the CAXC2T245QRSWRQ1 is triggered when either VCCA or VCCB falls below 100 mV - not when supply is absent or at 0 V. Upon detection, both A- and B-port I/Os immediately enter high-impedance state, effectively disconnecting the device from both buses. This behavior is hardware-enforced and requires no configuration. It protects downstream circuitry during brown-out, staged power-down, or fault conditions where one rail collapses before the other, preventing back-current injection or bus contention that could damage connected ICs.

Can the CAXC2T245QRSWRQ1 translate between 0.65 V and 3.6 V simultaneously on the same device?

Yes, the CAXC2T245QRSWRQ1 is explicitly rated for simultaneous operation with VCCA = 0.65 V and VCCB = 3.6 V - or any combination within those bounds. Its dual-rail architecture decouples input thresholds and output drive strength per port: A-port logic levels track VCCA (0.65 V), while B-port outputs swing to VCCB (3.6 V). This capability is verified across temperature and process corners in TI's characterization data (Section 6.3, Recommended Operating Conditions), enabling direct interfacing of ultra-low-voltage AI accelerators with legacy 3.3-V peripherals.

Is the CAXC2T245QRSWRQ1 pin-compatible with the SN74AXC2T245-Q1 commercial variant?

Yes, the CAXC2T245QRSWRQ1 is the automotive-qualified (AEC-Q100 Grade 1) version of the SN74AXC2T245-Q1 and shares identical pinout, package (10-pin UQFN RSW), electrical specifications, and functional behavior. The "C" prefix denotes automotive qualification, while "Q1" suffix confirms AEC-Q100 compliance - both part numbers use the same silicon die and layout. No PCB redesign is required when upgrading from SN74AXC2T245-Q1 to CAXC2T245QRSWRQ1 for automotive production.

CAXC2T245QRSWRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AXC

Package/Case:: 10-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Translation Transceiver

Number of Elements:: 1

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:: 10-UQFN (1.8x1.4)

CAXC2T245QRSWRQ1 FAQ

1.How can I place an order for CAXC2T245QRSWRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for CAXC2T245QRSWRQ1 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 CAXC2T245QRSWRQ1 reliable?

The price and inventory of CAXC2T245QRSWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAXC2T245QRSWRQ1 is usually 5 days.

3.What payment methods are accepted for CAXC2T245QRSWRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAXC2T245QRSWRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CAXC2T245QRSWRQ1?

CAXC2T245QRSWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CAXC2T245QRSWRQ1 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 CAXC2T245QRSWRQ1?

For technical support, including CAXC2T245QRSWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAXC2T245QRSWRQ1 requirements.

6.How does Aetrix verify that CAXC2T245QRSWRQ1 is sourced from the original manufacturer or authorized distributors?

All CAXC2T245QRSWRQ1 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 CAXC2T245QRSWRQ1 meets industry standards.

7.What is the process for return or replacement of CAXC2T245QRSWRQ1?

All CAXC2T245QRSWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAXC2T245QRSWRQ1, 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 CAXC2T245QRSWRQ1 part is unused and in its original packaging.

Return procedure for CAXC2T245QRSWRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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