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Texas Instruments CAXC4T774QBQBRQ1
- Part No.:
- CAXC4T774QBQBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
CAXC4T774QBQBRQ1.pdf
- Description:
- IC TRANSLATOR BIDIR 16WQFN T&R
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CAXC4T774QBQBRQ1 from Texas Instruments is an automotive-grade 4-bit dual-supply bus transceiver with independent direction control, configurable voltage translation (0.65V–3.6V per rail), and tri-state outputs. It enables bidirectional level shifting between mismatched voltage domains in infotainment head units and ADAS front cameras, supporting up to 310Mbps (1.8V→3.3V) with glitch-free power sequencing.
For engineers reviewing the CAXC4T774QBQBRQ1 datasheet, CAXC4T774QBQBRQ1 pinout, CAXC4T774QBQBRQ1 application, or CAXC4T774QBQBRQ1 equivalent, key selection criteria include AEC-Q100 qualification, VCCA/VCCB supply independence, Ioff partial-power-down support, and VCC isolation behavior below 100mV.
Technical Context
The CAXC4T774QBQBRQ1 implements four independent bidirectional transceivers, each with DIRx-controlled data flow direction and OE-gated tri-state output enable-all referenced to VCCA. Its dual-rail architecture allows asynchronous communication between buses operating at different voltages without external biasing or timing constraints.
Glitch-free power supply sequencing ensures robust operation during asymmetric VCCA/VCCB ramp-up/down, while VCC isolation disables all I/Os when either supply drops below 100mV-critical for fault containment in HEV/EV battery management systems. The device supports full 0.65V–3.6V operation on both rails across –40°C to +125°C.
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., LPDDR I/O) and 3.3V peripherals without external level shifters. |
| Max Data Rate | 310Mbps (1.8V→3.3V) - supports high-speed serial links in telematics control units requiring low-latency inter-domain communication. |
| Propagation Delay (tpd) | 5ns min / 7ns typ (VCCA=3.3V, VCCB=3.3V, TA=25°C) - ensures timing-critical ADAS fusion systems meet strict setup/hold margins. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and display module placement in automotive environments per AEC-Q100 Grade 1. |
| Ioff Current | ±8µA max (TA=125°C) - prevents back-driving and leakage during partial power-down in battery management subsystems. |
| VCC Isolation Threshold | <100mV on either VCCA or VCCB - forces high-impedance I/O state to prevent bus contention during brownout or hot-plug events. |
| ESD Rating | ±8000V HBM, ±1000V CDM - exceeds automotive ESD immunity requirements for infotainment and camera modules exposed to human contact. |
Pinout & Package
Package: 16-pin WQFN (BQB), 3.5mm × 2.5mm, 0.5mm pitch, thermal pad on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A4 | Data I/O (Port A) | Bi-directional signals referenced to VCCA; connect to low-voltage domain (e.g., SoC core I/O). |
| B1–B4 | Data I/O (Port B) | Bi-directional signals referenced to VCCB; interface with higher-voltage peripherals (e.g., display interface, sensor hub). |
| DIR1–DIR4 | Direction Control Input | Per-transceiver direction select (high = A→B, low = B→A); all referenced to VCCA for consistent control logic. |
| OE | Output Enable Input | Active-low global tri-state control; tie to VCCA via pullup to ensure high-Z during power-up. |
| VCCA | Port A Supply | Power rail for A-side logic and control inputs; sets VIH/VIL thresholds for DIRx/OE. |
| VCCB | Port B Supply | Power rail for B-side I/O drivers; independent of VCCA to enable true dual-voltage operation. |
| GND | Ground Reference | Common return path for both ports; requires low-inductance connection to minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-rail operation | Enables simultaneous 0.65V A-port and 3.3V B-port operation-eliminates need for discrete level-shifting components in mixed-voltage automotive ECUs. |
| VCC isolation | Automatically places all I/Os in high-impedance state if either VCCA or VCCB falls below 100mV-prevents bus contention during power faults in ADAS front camera modules. |
| Ioff partial-power-down | Limits leakage to ±8µA at 125°C when powered down-supports safe hot-swap and sleep-mode isolation in telematics gateways. |
| Glitch-free power sequencing | Allows VCCA and VCCB to be powered in any order without transient glitches-simplifies power architecture design for multi-rail automotive systems. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with extended reliability testing-meets functional safety requirements for ASIL-B–capable infotainment head units. |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
|
Use Scenario: Interfacing a 1.0V application processor to a 3.3V display timing controller and touch controller. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing parallel RGB and I²C buses between mismatched voltage domains. Use Value: Eliminates discrete level shifters and reduces BOM count by enabling direct SoC-to-peripheral connectivity with <5ns propagation delay. |
Use Scenario: Connecting a 1.8V image signal processor to 2.8V or 3.3V MIPI CSI-2 serializer and power management IC. IC Role / Device Role / Timing Role: Four-channel level shifter supporting parallel control lines (RESET, STANDBY, I²C) with independent direction per line. Use Value: Ensures glitch-free startup and shutdown via VCC isolation and Ioff, preventing spurious camera resets during vehicle ignition cycles. |
| ADAS Fusion ECU | HEV/EV Battery Management |
|
Use Scenario: Bridging 1.2V radar processor GPIOs to 2.5V CAN transceiver control pins and 3.3V Ethernet PHY management interfaces. IC Role / Device Role / Timing Role: Asynchronous bus transceiver handling mixed-voltage control signaling with independent DIRx per channel. Use Value: Supports deterministic latency (<12ns max tpd) required for time-synchronized sensor fusion across heterogeneous compute domains. |
Use Scenario: Isolating microcontroller GPIOs (1.8V) from high-side driver monitors (3.3V) and cell voltage measurement ICs (2.5V) in modular BMS stacks. IC Role / Device Role / Timing Role: Fault-tolerant level shifter with VCC isolation and Ioff, ensuring safe bus disconnection during cell overvoltage events. Use Value: Prevents cross-rail current injection during partial system shutdown-critical for ISO 26262-compliant functional safety architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LXC4T774QPWRQ1 | Lower static current (15µA vs 27µA ICCA+ICCB), identical pinout and specs except reduced ESD rating (4kV HBM vs 8kV). | Suitable for cost-sensitive, lower-risk interior modules where full AEC-Q100 HBM margin is not mandated. | Select when BOM cost reduction is prioritized over maximum ESD robustness in non-exposed locations. |
| SN74AXC8T245RHLR | 8-bit version, same dual-rail architecture but larger 24-pin VQFN package; no DIRx per bit-uses single DIR for all channels. | Better suited for high-pin-count data buses (e.g., parallel flash, memory expansion) rather than sparse control-line translation. | Choose for applications needing >4 bidirectional lines with shared direction control and space-constrained layouts. |
Compared with SN74LXC4T774QPWRQ1, CAXC4T774QBQBRQ1 provides higher ESD immunity critical for externally connected infotainment interfaces; compared with SN74AXC8T245RHLR, it offers finer-grained direction control per line-essential for mixed-signal ADAS subsystems with independent reset and status lines.
Availability
CAXC4T774QBQBRQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS front cameras, HEV/EV battery management systems, and telematics control units requiring stable component supply across automotive production lifecycles.
Supply support for CAXC4T774QBQBRQ1 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 over 90 years of innovation in high-reliability components.
The SN74AXC family delivers ultra-low-voltage, high-speed level translation for next-generation automotive ECUs-designed specifically to replace discrete solutions in ASIL-B–capable systems with stringent power, timing, and safety requirements.
FAQ
What is the minimum operating voltage for CAXC4T774QBQBRQ1 on each supply rail?
CAXC4T774QBQBRQ1 supports VCCA and VCCB down to 0.65V independently-enabling direct interfacing with sub-1V logic families such as LPDDR4 I/O and advanced SoC core domains. This capability is verified across the full –40°C to +125°C temperature range and is specified in Section 5.3 of the official TI datasheet SCES918E.
Does CAXC4T774QBQBRQ1 support true bidirectional translation without external direction control logic?
Yes, CAXC4T774QBQBRQ1 includes four independent DIRx inputs-one per transceiver-that directly control data flow direction (A→B or B→A) without requiring external gates or microcontroller intervention. Each DIRx pin is referenced to VCCA, ensuring consistent logic thresholds regardless of VCCB level, as confirmed in the Pin Functions table (Section 4) of the CAXC4T774QBQBRQ1 datasheet.
How does the VCC isolation feature behave during power-down sequences in automotive systems?
When either VCCA or VCCB drops below 100mV, CAXC4T774QBQBRQ1 automatically disables all A1–A4 and B1–B4 outputs and forces them into high-impedance state-preventing bus contention or back-powering during brownout, ignition-off, or hot-swap events. This behavior is hardware-enforced and requires no firmware coordination, as detailed in Section 7.3 of the CAXC4T774QBQBRQ1 datasheet.
Can CAXC4T774QBQBRQ1 be used in single-supply configurations?
Yes, CAXC4T774QBQBRQ1 operates correctly with VCCA = VCCB across the full 0.65V–3.6V range, functioning as a standard 4-bit non-inverting bus transceiver. This mode is explicitly supported and characterized in the Recommended Operating Conditions (Section 5.3) and Electrical Characteristics (Section 5.5) of the CAXC4T774QBQBRQ1 datasheet.
What thermal performance can be expected from the BQB (WQFN) package of CAXC4T774QBQBRQ1 in a typical automotive PCB layout?
In a standard 2-layer automotive PCB with 1-in² 2-oz copper pour under the thermal pad, the CAXC4T774QBQBRQ1 in BQB package achieves RθJB = 43.5°C/W and RθJA = 73.7°C/W (per Section 5.4). At 25°C ambient and 20mA total I/O current, junction temperature rise remains below 35°C-well within the +125°C limit, as validated by TI's thermal characterization report for SCES918E.
CAXC4T774QBQBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- 0.65 V ~ 3.6 V
- Voltage - VCCB:
- 0.65 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Non-Inverted
- Data Rate:
- 310Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WFQFN Exposed Pad
CAXC4T774QBQBRQ1 FAQ
1.How can I place an order for CAXC4T774QBQBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAXC4T774QBQBRQ1 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 CAXC4T774QBQBRQ1 reliable?
The price and inventory of CAXC4T774QBQBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAXC4T774QBQBRQ1 is usually 5 days.
3.What payment methods are accepted for CAXC4T774QBQBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAXC4T774QBQBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAXC4T774QBQBRQ1?
CAXC4T774QBQBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAXC4T774QBQBRQ1 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 CAXC4T774QBQBRQ1?
For technical support, including CAXC4T774QBQBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAXC4T774QBQBRQ1 requirements.
6.How does Aetrix verify that CAXC4T774QBQBRQ1 is sourced from the original manufacturer or authorized distributors?
All CAXC4T774QBQBRQ1 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 CAXC4T774QBQBRQ1 meets industry standards.
7.What is the process for return or replacement of CAXC4T774QBQBRQ1?
All CAXC4T774QBQBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAXC4T774QBQBRQ1, 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 CAXC4T774QBQBRQ1 part is unused and in its original packaging.
Return procedure for CAXC4T774QBQBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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