Product introduction and application of component SN74AXC2T45QDCURQ1

Creation Date

I. Core Product Overview

SN74AXC2T45QDCURQ1 is an AEC-Q100 automotive-qualified dual-supply rail bus transceiver, specifically designed for level conversion and bidirectional transmission between asynchronous data buses. Its core value lies in enabling cross-domain data transmission within a wide voltage range of 0.65V~3.6V through independently configurable VCCA and VCCB supply rails. It also supports single-supply operation, providing an efficient and reliable signal routing solution for multi-voltage-domain electronic systems.

II. Key Technical Features

  1. Wide Voltage Compatibility and Flexible Conversion
  • Dual-supply rail design: Port A tracks VCCA, and Port B tracks VCCB, both supporting a voltage range of 0.65V~3.6V. Enables bidirectional conversion between low-voltage domains (e.g., 0.65V) and high-voltage domains (e.g., 3.6V).
  • Single-supply compatibility: Supports single-supply operation to simplify system power design.
  • High-speed transmission performance: Achieves a data rate of up to 380Mbps in 1.8V→3.3V conversion scenarios, meeting high-speed communication requirements.
  1. High Reliability and Protection Design
  • Automotive qualification: Complies with AEC-Q100 standard, operating temperature range of -40°C~+125°C, suitable for harsh in-vehicle environments.
  • Enhanced ESD protection: 8000V Human-Body Model (HBM) and 1000V Charged-Device Model (CDM), exceeding industry standards.
  • Power supply protection mechanisms: VCC isolation function (all I/Os enter high-impedance state when either supply rail 100mV) and Ioff partial power-down protection, preventing device damage or signal interference caused by power anomalies.
  • High latch-up immunity: Exceeds 100mA, compliant with JESD 78 Class II specifications, enhancing system anti-interference capability.
  1. User-Friendly Design Features
  • Bidirectional transmission control: Flexible switching of data transmission direction (A→B or B→A) via the DIR pin (referenced to VCCA).
  • Glitch-free power sequencing: Supports arbitrary supply rail turn-on/off order, simplifying system power-up/down design.
  • Miniaturized package: Adopts VSSOP-8 package with a size of only 2.30mm×2.00mm, saving PCB space.
  • Compatibility: Compatible with AVC series level shifters, facilitating system upgrades and replacements.

III. Core Specification Parameters

Parameter Category Specific Specifications Supply Voltage Range VCCA/VCCB: 0.65V~3.6V Transmission Rate Up to 380Mbps (1.8V→3.3V conversion) Operating Temperature -40°C~+125°C Driving Capability IOH/IOL: ±12mA ESD Protection Level HBM: 8000V; CDM: 1000V Package Type VSSOP-8 (8 pins) Package Dimensions 2.30mm×2.00mm (nominal value) Qualification Standards AEC-Q100, JESD 22, JESD 78 Class IIIV. Typical Application Scenarios

Leveraging its automotive-grade reliability, wide voltage compatibility, and high-speed transmission capabilities, this device is widely used in multi-domain electronic systems:

  1. Automotive Electronics (Core Application Field)
  • ADAS (Advanced Driver Assistance Systems): Level conversion between sensors (millimeter-wave radar, cameras) and MCUs, supporting multi-sensor data fusion transmission.
  • IVI (In-Vehicle Infotainment Systems): Multi-source signal routing for central control screens, mobile phone projection, satellite navigation, etc., enabling bidirectional transmission of audio/video/data.
  • BMS (Battery Management Systems): Switching of cell voltage/temperature sampling signals, compatible with voltage domains of different sampling modules (e.g., 1.8V sampling chips and 3.3V MCUs).
  • In-vehicle communication interfaces: CAN/LIN bus level conversion, USB/HDMI interface signal conditioning, improving interface anti-interference capability.
  1. Industrial Automation
  • Industrial sensor networks: Cross-voltage-domain communication between PLCs and distributed sensors (e.g., 0.65V low-power sensors and 3.3V PLCs).
  • Building automation: Signal conversion for access control systems and environmental monitoring modules, supporting multi-device networking communication.
  • Industrial control interfaces: RS-485 bus, SPI/I2C interface level adaptation, simplifying interconnection of multi-protocol devices.
  1. Enterprise and Communication Equipment
  • Wireless infrastructure: High-speed data conversion between base station RF modules and baseband units, supporting 380Mbps transmission rate.
  • Network switches: Signal routing for different port voltage domains, improving device port compatibility.
  • Point-of-Sale (POS) terminals: Level conversion for barcode scanning modules and payment interfaces, balancing low power consumption and reliability.
  1. Consumer Electronics
  • Personal electronic products: Interface expansion for laptops and tablets (e.g., voltage adaptation between USB-C and internal modules).
  • Smart homes: Cross-voltage-domain communication between gateways and sensor nodes, adapting to wide voltage requirements of low-power devices.