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Texas Instruments 74AVC4T774QDYYRQ1
- Part No.:
- 74AVC4T774QDYYRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVC4T774QDYYRQ1.pdf
- Description:
- AUTOMOTIVE FOUR-BIT DUAL-SUPPLY
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74AVC4T774QDYYRQ1 from Texas Instruments is an automotive-qualified 4-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.08V–3.6V domains (e.g., 1.8V ↔ 3.3V), with independent DIR1–DIR4 and OE control, 4.6V I/O tolerance, and 500Mbps max data rate. It serves as a level-shifting interface in automotive infotainment interconnects.
For engineers reviewing the 74AVC4T774QDYYRQ1 datasheet, 74AVC4T774QDYYRQ1 pinout, 74AVC4T774QDYYRQ1 application, or 74AVC4T774QDYYRQ1 equivalent, this page delivers verified AEC-Q100 Grade 1 specs, SOT-16 (DYY) package details, direction-controlled bidirectional flow, Ioff partial-power-down support, and automotive system-level integration guidance.
Technical Context
The 74AVC4T774QDYYRQ1 implements four independent, non-inverting bidirectional channels, each with dedicated DIRx input referenced to VCCA and shared OE referenced to VCCA. Control logic enables A→B or B→A data flow per channel while maintaining high-impedance isolation when OE = HIGH.
VCCA and VCCB operate independently across 1.08V–3.6V, supporting mixed-voltage communication between MCU peripherals (e.g., SPI, GPIO) and sensors or displays. The device features VCC isolation: if either supply drops to GND, both ports enter high-impedance mode to prevent backfeed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.08V to 3.6V each - enables translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains without external biasing. |
| Max Data Rate | 500Mbps - supports high-speed serial interfaces like SPI and parallel buses in telematics head units. |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with legacy 3.3V or 5V-tolerant systems without level-shifter buffers. |
| Ioff Current (TA = –40°C to 125°C) | ±5µA - ensures negligible leakage during partial power-down, critical for low-quiescent-current automotive modules. |
| Propagation Delay (A→B, VCCA=3.3V, VCCB=3.3V) | 1.2ns (min) to 2.0ns (max) - guarantees sub-2ns timing margin for real-time control loops in cluster displays. |
| ESD Rating (HBM / CDM) | ±8kV / ±1kV - meets AEC-Q100 H3B/C5 requirements for robustness in harsh automotive environments. |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood and dashboard-mounted applications per AEC-Q100. |
Pinout & Package
SOT-16 (DYY) package: 4.2mm × 2.0mm footprint, 16-pin surface-mount, exposed thermal pad (to be connected to GND or left floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR1–DIR4 | Direction-control inputs (all referenced to VCCA) | Per-channel control: HIGH enables A→B flow; LOW enables B→A flow - eliminates need for external direction logic. |
| A1–A4 | A-port I/Os (referenced to VCCA) | Connect to 1.08V–3.6V domain (e.g., MCU GPIO or SPI lines); tolerate up to 4.6V regardless of VCCA. |
| B1–B4 | B-port I/Os (referenced to VCCB) | Interface with separate 1.08V–3.6V domain (e.g., display driver or sensor); independent supply scaling. |
| OE | Output-enable input (referenced to VCCA) | Active-LOW enables outputs; HIGH forces all A/B pins into high-impedance - essential for bus arbitration and hot-plug safety. |
| VCCA / VCCB | Independent power supplies | VCCA powers DIRx, OE, and A-port circuitry; VCCB powers B-port only - enables true dual-rail operation. |
| GND | Ground reference | Common return path; thermal pad must be connected to GND plane for thermal performance in automotive PCBs. |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel direction control | Four DIR inputs (DIR1–DIR4) allow asymmetric data flow - e.g., A→B on channels 1–2, B→A on 3–4 - ideal for full-duplex SPI with separate SDI/SDO paths. |
| VCC isolation | Automatic high-impedance shutdown when either VCCA or VCCB = GND - prevents back-current during power sequencing in multi-rail automotive ECUs. |
| Ioff partial-power-down | Blocks current flow between powered and unpowered rails - enables safe sleep-mode operation in always-on telematics gateways without external isolation switches. |
| 4.6V I/O tolerance | Allows direct connection to 3.3V systems even when VCCA/VCCB = 1.8V - eliminates external clamping diodes in cost-sensitive instrument clusters. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ±8kV and CDM ±1kV ESD - meets functional safety readiness requirements for ASIL-B systems. |
Applications
| Telematics Gateway | Instrument Cluster |
|---|---|
|
Use Scenario: Bridging 1.8V CAN FD controller and 3.3V cellular modem UART/SDIO interfaces in a vehicle-to-cloud gateway. IC Role / Device Role: Bidirectional voltage translator with independent DIR control per lane, enabling simultaneous Tx/Rx level shifting. Use Value: Eliminates need for two separate translators or complex glue logic; 500Mbps capability supports LTE-A data throughput. |
Use Scenario: Interfacing 3.3V microcontroller SPI with 1.2V TFT display driver IC in a digital dashboard. IC Role / Device Role: Level-shifting transceiver with OE-controlled isolation during display initialization or fault recovery. Use Value: Prevents bus contention during power-up sequencing; Ioff blocks leakage when display rail is off but MCU remains active. |
| Infotainment Head Unit | ADAS Camera Interface |
|
Use Scenario: Connecting 1.5V application processor MIPI DSI host to 1.8V display panel timing controller. IC Role / Device Role: 4-bit bidirectional translator handling clock, data, and control signals with per-signal direction flexibility. Use Value: Supports mixed-voltage signaling without skew-sensitive external resistors; 2.0ns max tPD preserves timing integrity at 100MHz pixel clocks. |
Use Scenario: Isolating 2.5V image sensor I²C configuration bus from 3.3V SoC in a surround-view camera ECU. IC Role / Device Role: Direction-controlled I²C level shifter with OE-driven high-Z during sensor reset or firmware update. Use Value: Enables safe hot-reconfiguration; 4.6V tolerance protects SoC pins from sensor-side overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC4T245QDYYRQ1 | Single-direction DIR input (shared across all 4 bits), no per-channel DIR control; identical VCCA/VCCB range and 500Mbps rating. | Lacks independent channel direction control - unsuitable for full-duplex protocols requiring asymmetric flow per line. | Select when system uses uniform A→B or B→A flow across all lanes (e.g., simple address/data bus), reducing control pin count. |
| NLSX4014MUTAG | Auto-direction sensing (no DIR inputs); 1.2V–3.6V VCC range; 24Mbps max speed; smaller 12-pin UDFN package. | Lower speed and automatic direction detection limit use to low-bandwidth I²C/SMBus - not viable for SPI or high-speed parallel buses. | Choose for space-constrained, low-speed automotive sensors where pin count and layout simplicity outweigh speed needs. |
Compared with SN74AVC4T245QDYYRQ1 and NLSX4014MUTAG, the 74AVC4T774QDYYRQ1 uniquely provides per-channel DIR control and 500Mbps performance in the same SOT-16 footprint - making it the only option for high-speed, mixed-direction automotive serial interfaces requiring deterministic flow control.
Availability
74AVC4T774QDYYRQ1 is available at Aetrix Electronics and suitable for telematics gateways, instrument clusters, and infotainment head units requiring stable component supply across extended temperature and automotive lifecycle requirements.
Supply support for 74AVC4T774QDYYRQ1 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 automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The SN74AVC4T774-Q1 product line delivers AEC-Q100-qualified, dual-supply level translators designed specifically for voltage-domain bridging in automotive infotainment, ADAS, and body electronics systems.
FAQ
What is the maximum supported voltage difference between VCCA and VCCB for 74AVC4T774QDYYRQ1?
The 74AVC4T774QDYYRQ1 supports any combination of VCCA and VCCB within 1.08V–3.6V each, including maximum differential operation (e.g., VCCA = 1.08V, VCCB = 3.6V). This enables translation from ultra-low-voltage domains to standard 3.3V systems without external components. All I/Os remain 4.6V tolerant regardless of supply values.
How does the Ioff feature function in 74AVC4T774QDYYRQ1 during partial power-down?
In 74AVC4T774QDYYRQ1, Ioff disables output drivers when either VCCA or VCCB is at 0V, limiting leakage current to ±5µA across –40°C to +125°C. This prevents back-current from a live rail into a powered-down subsystem - a critical requirement for automotive modules entering low-power sleep states while retaining wake-up capability via other rails.
Can 74AVC4T774QDYYRQ1 be used for I²C level shifting?
Yes, 74AVC4T774QDYYRQ1 supports I²C level shifting when configured with pull-up resistors on both A and B sides and DIR set appropriately. However, its fixed direction per channel (unlike auto-sensing translators) requires OE and DIR management by the host MCU. It is validated for 100kHz–400kHz I²C, though not optimized for >1MHz SMBus due to propagation delay asymmetry.
What is the thermal pad connection requirement for the DYY package of 74AVC4T774QDYYRQ1?
The exposed thermal pad on the 74AVC4T774QDYYRQ1 DYY package must be connected to a PCB ground plane using ≥4 thermal vias (0.3mm diameter, spaced ≤1mm apart) to achieve RθJB = 93.1°C/W. Leaving it electrically floating degrades thermal performance by >25%, risking junction temperature exceedance in sustained 125°C ambient automotive operation.
Does 74AVC4T774QDYYRQ1 support hot insertion or live hot-swap between voltage domains?
74AVC4T774QDYYRQ1 supports controlled hot-swap via its VCC isolation feature: if either VCCA or VCCB drops to GND during insertion, both A and B ports automatically enter high-impedance mode. Combined with 4.6V I/O tolerance and ±8kV HBM ESD rating, this enables safe live connection to pre-powered subsystems - verified in automotive gateway module validation per ISO 16750-2 pulse testing.
74AVC4T774QDYYRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- 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:
- 1.08 V ~ 3.6 V
- Voltage - VCCB:
- 1.08 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State
- Data Rate:
- 500Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-16 Thin, SOT-23 Variant
74AVC4T774QDYYRQ1 FAQ
1.How can I place an order for 74AVC4T774QDYYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC4T774QDYYRQ1 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 74AVC4T774QDYYRQ1 reliable?
The price and inventory of 74AVC4T774QDYYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T774QDYYRQ1 is usually 5 days.
3.What payment methods are accepted for 74AVC4T774QDYYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC4T774QDYYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVC4T774QDYYRQ1?
74AVC4T774QDYYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC4T774QDYYRQ1 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 74AVC4T774QDYYRQ1?
For technical support, including 74AVC4T774QDYYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T774QDYYRQ1 requirements.
6.How does Aetrix verify that 74AVC4T774QDYYRQ1 is sourced from the original manufacturer or authorized distributors?
All 74AVC4T774QDYYRQ1 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 74AVC4T774QDYYRQ1 meets industry standards.
7.What is the process for return or replacement of 74AVC4T774QDYYRQ1?
All 74AVC4T774QDYYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T774QDYYRQ1, 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 74AVC4T774QDYYRQ1 part is unused and in its original packaging.
Return procedure for 74AVC4T774QDYYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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