My Inquiry
My Account
Texas Instruments CAXC8T245QWRGYRQ1
- Part No.:
- CAXC8T245QWRGYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
CAXC8T245QWRGYRQ1.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,020
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CAXC8T245QWRGYRQ1 from Texas Instruments is an AEC-Q100 qualified 8-bit dual-supply bus transceiver enabling bidirectional voltage translation between 0.65V–3.6V domains, supporting up to 380Mbps (1.8V→3.3V), with independent DIR1/DIR2 control for simultaneous up/down translation and VCC isolation for power-down safety in automotive infotainment and ADAS systems.
For engineers reviewing the CAXC8T245QWRGYRQ1 datasheet, CAXC8T245QWRGYRQ1 pinout, CAXC8T245QWRGYRQ1 application, or CAXC8T245QWRGYRQ1 equivalent, this device delivers verified Ioff partial power-down protection, ±8kV HBM ESD rating, and wettable flank VQFN (WRGY) packaging optimized for automated optical inspection and thermal reliability in 125°C under-hood environments.
Technical Context
The CAXC8T245QWRGYRQ1 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, placing I/Os in high-impedance state; Ioff circuitry actively limits backflow current during partial power-down, meeting JESD78 Class II latch-up requirements (>100mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 0.65V to 3.6V per rail - enables interoperability across legacy (3.3V) and advanced-node (0.7V–0.9V) logic families |
| Max Data Rate | 380Mbps at 1.8V→3.3V translation - supports high-speed serial peripheral interconnects in camera and sensor fusion |
| Operating Temperature | –40°C to +125°C - qualified for engine bay, ADAS ECU, and battery management system deployment |
| ESD Rating (HBM) | ±8000V - exceeds AEC-Q100-002 for robustness in automotive assembly and field operation |
| Propagation Delay (tpd) | As low as 4ns (VCCA=2.5V, VCCB=3.3V) - ensures timing-critical signal integrity in real-time sensor data paths |
| Ioff Current | ±12µA max at 125°C - prevents damaging backfeed into powered-down subsystems during sleep/wake transitions |
| VCC Isolation Threshold | <100mV on either rail - guarantees automatic high-Z fail-safe behavior during brownout or supply sequencing faults |
Pinout & Package
Package: 24-pin wettable flank VQFN (WRGY), 5.5mm × 3.5mm, with exposed thermal pad (recommended grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply reference | Power rail for A-side I/Os and control inputs (DIR1, DIR2, OE); sets VIH/VIL thresholds |
| VCCB | B-port supply reference | Independent power rail for B-side I/Os; enables asymmetric voltage translation (e.g., 0.8V↔2.5V) |
| A1–A8 | A-port bidirectional data | I/Os referenced to VCCA; support 8-bit parallel bus bridging between low-voltage processors and legacy peripherals |
| B1–B8 | B-port bidirectional data | I/Os referenced to VCCB; electrically isolated from A-side except through translation logic |
| DIR1 / DIR2 | Direction control inputs | Enable independent A→B and B→A flow; DIR2 tied to GND maintains backward compatibility with SN74AVC8T245-Q1 |
| OE | Output enable (active-low) | Pull to GND enables transceivers; pull to VCCA places all I/Os in high-Z - critical for bus arbitration and hot-swap |
| GND (pins 12, 13) | Ground reference | Dual ground pins reduce impedance and improve noise immunity in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | Enables simultaneous 0.65V↔3.3V and 0.8V↔1.8V translations on same device without external level-shifting components |
| VCC isolation | Automatically forces all I/Os into high-impedance when either VCCA or VCCB drops below 100mV - eliminates need for external isolation logic |
| Partial power-down (Ioff) | Restricts backflow current to ≤±12µA at 125°C - protects unpowered subsystems during deep-sleep modes in ADAS ECUs |
| Wettable flank WRGY package | Facilitates automated optical inspection (AOI) of solder joints - improves manufacturing yield and field-reliability in automotive production |
| Multiple direction controls | DIR1 and DIR2 allow concurrent A→B and B→A data flow - essential for full-duplex sensor fusion and memory-mapped register access |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
|
Use Scenario: Interfacing a 0.8V MIPI D-PHY processor core with a 1.8V display timing controller and 3.3V audio codec. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing parallel control buses and status lines between mixed-voltage SoC peripherals. Use Value: Eliminates discrete level shifters while maintaining <4ns propagation delay and guaranteed 125°C operation for dashboard display responsiveness. |
Use Scenario: Bridging a 0.7V image sensor interface to a 2.5V ISP pipeline and 3.3V vehicle network diagnostics port. IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling real-time pixel data transfer and configuration register access across voltage domains. Use Value: Supports 380Mbps burst-mode transfers and VCC isolation during camera power cycling - prevents bus contention and corruption. |
| ADAS Fusion ECU | HEV Battery Management System |
|
Use Scenario: Aggregating CAN FD, Ethernet AVB, and radar preprocessing data onto a 1.2V microcontroller bus using shared memory-mapped registers. IC Role / Device Role / Timing Role: Dual-directional level shifter synchronizing control/status signals between heterogeneous sensor clusters and host MCU. Use Value: DIR1/DIR2 independence allows concurrent read/write operations across voltage islands - reduces latency in sensor fusion decision loops. |
Use Scenario: Isolating a 3.3V battery monitor IC's SMBus interface from a 1.5V safety microcontroller during cell balancing cycles. IC Role / Device Role / Timing Role: Fail-safe bus isolator leveraging VCC isolation and Ioff to prevent backfeed into powered-down safety domain. Use Value: Guarantees high-Z state within 100mV supply drop - meets ISO 26262 ASIL-B functional safety requirements for BMS communication integrity. |
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 | Fixed 1.2V–3.6V translation range; no sub-0.8V support; lacks VCC isolation; DIR2 not implemented (tied internally) | Valid only for 1.2V+ systems; unsuitable for latest ultra-low-voltage processors or fail-safe isolation needs | Select CAXC8T245QWRGYRQ1 when translating below 0.8V or requiring VCC isolation/Ioff in ASIL-B designs |
| NLSX8018MUTAG | 4-bit, single-direction, auto-direction sensing; 0.9V–4.5V range; no DIR/OE pins; lower drive strength (24mA vs 32mA) | Designed for simple point-to-point I²C/SMBus links; cannot support 8-bit parallel buses or independent direction control | Choose CAXC8T245QWRGYRQ1 for 8-bit parallel, bidirectional, and multi-control-signal applications in automotive ECUs |
Compared with SN74AVC8T245-Q1 and NLSX8018MUTAG, the CAXC8T245QWRGYRQ1 uniquely supports sub-0.8V logic, provides hardware-enforced VCC isolation, and delivers full 8-bit bidirectional control with two independent DIR inputs - making it the only option qualified for next-gen automotive SoC interfaces requiring both performance and functional safety.
Availability
CAXC8T245QWRGYRQ1 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 CAXC8T245QWRGYRQ1 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 with deep automotive qualification expertise and AEC-Q100 program leadership.
The SN74AXC series targets next-generation automotive electronics requiring ultra-low-voltage interoperability, fail-safe power management, and high-speed mixed-domain communication - directly addressing electrification and ADAS architecture evolution.
FAQ
What is the minimum operating voltage for VCCA and VCCB on the CAXC8T245QWRGYRQ1?
The CAXC8T245QWRGYRQ1 supports VCCA and VCCB down to 0.65V each, enabling direct interfacing with sub-1V logic families such as 0.7V and 0.8V processors used in modern automotive SoCs. This capability is confirmed in Section 5.3 (Recommended Operating Conditions) of the official datasheet, where 0.65V is specified as the absolute minimum for both supplies across the full –40°C to +125°C temperature range.
Does the CAXC8T245QWRGYRQ1 support true bidirectional translation with independent control per direction?
Yes, the CAXC8T245QWRGYRQ1 features two dedicated direction-control inputs - DIR1 governs A→B flow and DIR2 governs B→A flow - allowing simultaneous bidirectional data transfer. This is explicitly documented in the Features list and Functional Description sections, distinguishing it from single-DIR alternatives like SN74AVC8T245-Q1, where DIR2 is absent and direction is fixed per device instance.
How does VCC isolation work on the CAXC8T245QWRGYRQ1, and what triggers it?
VCC isolation on the CAXC8T245QWRGYRQ1 activates automatically when either VCCA or VCCB falls below 100mV, forcing all A- and B-port I/Os into a high-impedance state regardless of OE or DIR states. This behavior is defined in the Description section and ensures fail-safe bus disconnection during supply faults or sequencing errors - a key differentiator from non-isolating level shifters.
Is the CAXC8T245QWRGYRQ1 pin-compatible with the SN74AVC8T245-Q1?
No, the CAXC8T245QWRGYRQ1 is not pin-compatible with SN74AVC8T245-Q1. While both use 24-pin VQFN packages, the CAXC8T245QWRGYRQ1 assigns DIR2 to pin 11 (functional), whereas SN74AVC8T245-Q1 leaves pin 11 unused or reserved. Additionally, CAXC8T245QWRGYRQ1 requires explicit DIR2 handling for full functionality, unlike the legacy part's single-DIR architecture.
What thermal performance can be expected from the CAXC8T245QWRGYRQ1 in the WRGY package?
In the WRGY (24-pin VQFN) package, the CAXC8T245QWRGYRQ1 achieves RθJA = 48.1°C/W and RθJB = 26.1°C/W, enabling reliable operation at 125°C ambient when mounted on standard 2-layer PCBs with adequate copper pour. These values are measured per JEDEC standards and published in Section 5.4 (Thermal Information) of the datasheet - confirming suitability for under-hood automotive placement.
CAXC8T245QWRGYRQ1 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)
CAXC8T245QWRGYRQ1 FAQ
1.How can I place an order for CAXC8T245QWRGYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAXC8T245QWRGYRQ1 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 CAXC8T245QWRGYRQ1 reliable?
The price and inventory of CAXC8T245QWRGYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAXC8T245QWRGYRQ1 is usually 5 days.
3.What payment methods are accepted for CAXC8T245QWRGYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAXC8T245QWRGYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAXC8T245QWRGYRQ1?
CAXC8T245QWRGYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAXC8T245QWRGYRQ1 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 CAXC8T245QWRGYRQ1?
For technical support, including CAXC8T245QWRGYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAXC8T245QWRGYRQ1 requirements.
6.How does Aetrix verify that CAXC8T245QWRGYRQ1 is sourced from the original manufacturer or authorized distributors?
All CAXC8T245QWRGYRQ1 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 CAXC8T245QWRGYRQ1 meets industry standards.
7.What is the process for return or replacement of CAXC8T245QWRGYRQ1?
All CAXC8T245QWRGYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAXC8T245QWRGYRQ1, 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 CAXC8T245QWRGYRQ1 part is unused and in its original packaging.
Return procedure for CAXC8T245QWRGYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CAXC8T245QWRGYRQ1 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
