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Texas Instruments CAVCB164245QDGGRQ1
- Part No.:
- CAVCB164245QDGGRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
CAVCB164245QDGGRQ1.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CAVCB164245QDGGRQ1 from Texas Instruments is an automotive-qualified 16-bit dual-supply bus transceiver with configurable voltage translation, supporting bidirectional level-shifting between 1.4 V and 3.6 V rails (e.g., 1.8 V ↔ 3.3 V), ±24 mA drive strength at 2.5 V, and Ioff partial-power-down protection. It enables isolated communication between mixed-voltage data buses in ADAS domain controllers.
For engineers reviewing the CAVCB164245QDGGRQ1 datasheet, CAVCB164245QDGGRQ1 pinout, CAVCB164245QDGGRQ1 application, or CAVCB164245QDGGRQ1 equivalent, key selection criteria include dual-rail voltage flexibility, automotive temperature range (–40°C to 125°C), DOC™ noise-reduction circuitry, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The CAVCB164245QDGGRQ1 implements a fully configurable dual-rail architecture: A-port tracks VCCA (1.4–3.6 V), B-port tracks VCCB (1.4–3.6 V), and control inputs (DIR, OE) are referenced to VCCB. Its DOC™ circuitry dynamically modulates output impedance during signal transitions to reduce switching noise without sacrificing speed.
It supports asynchronous bidirectional data flow per octal section via DIR-controlled direction and OE-gated 3-state outputs. Ioff protection disables outputs and blocks current backflow when either VCCA or VCCB is at GND, enabling safe partial-power-down operation in automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 1.4 V to 3.6 V each - enables direct interfacing between 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic domains without external level shifters. |
| Drive Strength (IOH/IOL) | ±24 mA at 2.5 V - delivers robust signal integrity across noisy automotive harnesses and long trace runs. |
| Propagation Delay (tpd) | 1.3 ns (min) to 13.6 ns (max) - supports high-speed interconnects up to ~70 MHz in worst-case automotive thermal conditions. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 for engine bay, infotainment, and ADAS ECUs requiring extended thermal margin. |
| Ioff Current | ±10 µA max - prevents damaging back-current during power sequencing or hot-swap events in multi-rail systems. |
| ESD Rating | 2000-V HBM, 200-V MM, 750-V CDM - meets stringent automotive ESD immunity requirements for in-vehicle deployment. |
| Package | TSSOP-48 (DGG) - 0.5 mm pitch, 12.6 mm × 6.1 mm footprint, compatible with standard SMT reflow profiles (MSL Level-3). |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.1 mm body, 0.5 mm lead pitch, 1.2 mm max height, RoHS-compliant NiPdAu finish, MSL Level-3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per octal section) | Determines data flow direction: low = B→A, high = A→B; referenced to VCCB for consistent threshold across supply voltages. |
| 1OE, 2OE | Output enable input (per octal section) | Active-low; pulls outputs to high-impedance when high - enables bus isolation during sleep or fault recovery. |
| 1A1–1A8, 2A1–2A8 | A-port data I/O (octal groups) | Connect to VCCA-domain bus; tolerate up to VCCA + 0.5 V in driven state and –0.5 V to 4.6 V in high-Z state. |
| 1B1–1B8, 2B1–2B8 | B-port data I/O (octal groups) | Connect to VCCB-domain bus; tolerate up to VCCB + 0.5 V in driven state and –0.5 V to 4.6 V in high-Z state. |
| VCCA, VCCB | Independent supply rails | VCCA powers A-port I/O; VCCB powers B-port I/O and all control inputs - enables true mixed-voltage operation. |
| GND (pins 4,6,10,15,20,22,27,32,37,39,44) | Ground terminals | 11 dedicated ground pins minimize ground bounce and improve noise immunity in high-speed bidirectional transfers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Each port operates independently from 1.4 V to 3.6 V - eliminates need for discrete level-shifters in multi-voltage SoC interfaces. |
| DOC™ dynamic output control | Reduces simultaneous switching noise by modulating output impedance mid-transition - improves signal integrity without slowing edge rates. |
| Ioff partial-power-down protection | Blocks >99.9% of back-current when either rail is unpowered - enables safe hot-plug and power-sequence-flexible designs. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), latch-up >100 mA - certified for safety-critical vehicle networks and domain controllers. |
| VCCB-referenced controls | DIR/OE thresholds track VCCB - ensures reliable logic interpretation even when VCCA and VCCB differ significantly (e.g., 1.8 V/3.3 V). |
Applications
| ADAS Sensor Fusion Hub | Automotive Infotainment Gateway |
|---|---|
|
Use Scenario: Aggregating camera, radar, and ultrasonic sensor data into a central processing unit with mismatched I/O voltages (e.g., 1.8 V MIPI CSI-2 sensors ↔ 3.3 V CAN FD controller). IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling lossless data handoff between heterogeneous sensor interfaces and host processor buses. Use Value: Eliminates discrete level-shifter ICs and associated layout area, reducing BOM count and signal path skew in time-sensitive sensor fusion pipelines. |
Use Scenario: Interfacing legacy 2.5 V audio codecs and 3.3 V display controllers to a 1.8 V application processor in head-unit designs. IC Role / Device Role / Timing Role: Dual-octal bus transceiver providing isolated, direction-controlled data routing between voltage-isolated subsystems. Use Value: Maintains <14 ns propagation delay across full temperature range, preserving timing margins for real-time audio/video synchronization. |
| Electric Powertrain Control Module | Vehicle-to-Everything (V2X) Communication Unit |
|
Use Scenario: Isolating diagnostic CAN (3.3 V) and motor-control SPI (1.8 V) buses during firmware updates to prevent cross-rail interference. IC Role / Device Role / Timing Role: 3-state-enabled bus isolator with Ioff protection, ensuring no leakage current disrupts powered-down subsystems. Use Value: Enables safe in-field firmware upgrades without hardware reset or power cycling - critical for ASIL-B compliant powertrain software delivery. |
Use Scenario: Bridging IEEE 802.11p DSRC PHY (2.5 V) and cellular modem baseband (1.8 V) in roadside units requiring deterministic latency. IC Role / Device Role / Timing Role: Low-noise bidirectional translator leveraging DOC™ circuitry to suppress RF coupling into sensitive wireless receivers. Use Value: Reduces radiated emissions by >6 dB compared to standard CMOS translators - simplifies EMC compliance testing for V2X deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC16T245QRGYRQ1 | 16-bit, single-direction configuration per bank; no per-octal DIR/OE - uses global direction control. | Suited for simpler point-to-point links where both octals share identical direction; less flexible for mixed-direction subsystems. | Select when system-level direction control suffices and board space allows larger 48-pin VQFN (RGY) package. |
| TXS0108EQRGTRQ1 | 8-bit, auto-direction sensing; no DIR pin - detects data flow direction dynamically via bus activity. | Optimized for I²C/SMBus translation; lacks drive strength (±8 mA) and automotive temp range (–40°C to 105°C only). | Prefer for low-speed, bidirectional serial buses; avoid for high-speed parallel data paths requiring ±24 mA drive. |
Compared with SN74AVC16T245QRGYRQ1 and TXS0108EQRGTRQ1, the CAVCB164245QDGGRQ1 provides per-octal directional control and higher drive strength, making it uniquely suitable for complex automotive domain controllers requiring independent management of multiple voltage-isolated data lanes.
Availability
CAVCB164245QDGGRQ1 is available at Aetrix Electronics and suitable for ADAS sensor hubs, electric powertrain modules, and V2X communication units requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for CAVCB164245QDGGRQ1 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-grade ICs, with decades of experience in high-reliability transportation electronics.
The CAVCB164245QDGGRQ1 belongs to TI's AVC Widebus™ family, engineered specifically for automotive mixed-voltage system integration - delivering robust level translation, noise resilience, and AEC-Q100 compliance in compact packages.
FAQ
What is the maximum operating voltage for CAVCB164245QDGGRQ1 I/O pins?
The CAVCB164245QDGGRQ1 supports absolute maximum I/O voltage of –0.5 V to VCCA + 0.5 V on A-port pins and –0.5 V to VCCB + 0.5 V on B-port pins. This allows safe overvoltage tolerance during transient conditions while maintaining compatibility with 1.4–3.6 V supply rails. The CAVCB164245QDGGRQ1 does not support 5 V logic interfaces.
How does the DOC™ circuitry in CAVCB164245QDGGRQ1 reduce noise?
The DOC™ (Dynamic Output Control) circuitry in the CAVCB164245QDGGRQ1 lowers output impedance at signal transition onset to drive loads aggressively, then raises impedance mid-transition to damp ringing and suppress simultaneous switching noise. This preserves fast edge rates while cutting radiated emissions - a key advantage over fixed-drive translators in automotive EMC-sensitive environments. The CAVCB164245QDGGRQ1 implements this per-output without external components.
Can CAVCB164245QDGGRQ1 operate with VCCA = 1.8 V and VCCB = 3.3 V simultaneously?
Yes, the CAVCB164245QDGGRQ1 is explicitly designed for asymmetric dual-rail operation: VCCA may be set to 1.8 V while VCCB is set to 3.3 V, enabling seamless translation between 1.8 V processors and 3.3 V peripherals. Control inputs (DIR, OE) reference VCCB, ensuring correct logic interpretation regardless of VCCA level. This capability is verified across the full –40°C to 125°C range in the CAVCB164245QDGGRQ1 datasheet.
What is the recommended pull-up for OE pins on CAVCB164245QDGGRQ1?
Texas Instruments recommends tying OE pins to VCCB through a pull-up resistor to ensure high-impedance state during power-up. The minimum resistance is determined by the current-sinking capability of the driving source; typical values range from 4.7 kΩ to 10 kΩ for standard logic drivers. This prevents bus contention before system initialization completes. The CAVCB164245QDGGRQ1 datasheet specifies that OE must be actively driven or pulled to VCCB - floating OE is not permitted.
Is CAVCB164245QDGGRQ1 pin-compatible with non-automotive variants like SN74AVCB164245?
Yes, the CAVCB164245QDGGRQ1 shares identical pinout, package (TSSOP-48 DGG), and electrical behavior with the commercial SN74AVCB164245, differing only in automotive qualification (AEC-Q100 Grade 1), extended temperature screening, and enhanced reliability testing. No PCB layout changes are required when upgrading from SN74AVCB164245 to CAVCB164245QDGGRQ1 in automotive designs.
CAVCB164245QDGGRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCB
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.4 V ~ 3.6 V
- Voltage - VCCB:
- 1.4 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFSOP (0.240", 6.10mm Width)
CAVCB164245QDGGRQ1 FAQ
1.How can I place an order for CAVCB164245QDGGRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAVCB164245QDGGRQ1 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 CAVCB164245QDGGRQ1 reliable?
The price and inventory of CAVCB164245QDGGRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAVCB164245QDGGRQ1 is usually 5 days.
3.What payment methods are accepted for CAVCB164245QDGGRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAVCB164245QDGGRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAVCB164245QDGGRQ1?
CAVCB164245QDGGRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAVCB164245QDGGRQ1 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 CAVCB164245QDGGRQ1?
For technical support, including CAVCB164245QDGGRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAVCB164245QDGGRQ1 requirements.
6.How does Aetrix verify that CAVCB164245QDGGRQ1 is sourced from the original manufacturer or authorized distributors?
All CAVCB164245QDGGRQ1 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 CAVCB164245QDGGRQ1 meets industry standards.
7.What is the process for return or replacement of CAVCB164245QDGGRQ1?
All CAVCB164245QDGGRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CAVCB164245QDGGRQ1, 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 CAVCB164245QDGGRQ1 part is unused and in its original packaging.
Return procedure for CAVCB164245QDGGRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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