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I2C 與 I3C 位準移位器、緩衝器與集線器

PCA9306-Q1

現行

車用 2 位元雙向 400 kHz I2C/SMBus 電壓位準轉換器

立即訂購
產品規格表

PCA9306-Q1

現行
產品規格表 立即訂購

產品詳細資料

Features Enable pin Protocols I2C Frequency (max) (MHz) 0.4 VCCA (min) (V) 1.2 VCCA (max) (V) 5.5 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (°C) -40 to 105
Features Enable pin Protocols I2C Frequency (max) (MHz) 0.4 VCCA (min) (V) 1.2 VCCA (max) (V) 5.5 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (°C) -40 to 105
VSSOP (DCU) 8 6.2 mm² (2 mm × 3.1 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 2: –40°C to 105°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C4B
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Compatible with I2C and SMBus
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I2C devices and multiple controllers
  • Allows voltage-level translation between
    • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
    • 2.5-V VREF1 and 3.3-V, or 5-V VREF2
    • 3.3-V VREF1 and 5-V VREF2
  • Provides bidirectional voltage translation with no direction pin
  • Low 3.5-Ω ON-state connection between input and output ports provides less signal distortion
  • Open-drain I2C I/O Ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V tolerant I2C I/O ports to support mixed-mode signal operation
  • High-impedance SCL1, SDA1, SCL2, and SDA2 pins for EN = low
  • Lock-up-free operation for isolation when EN = Low
  • Flow-through pinout for ease of printed-circuit board trace routing
  • Latch-up performance exceeds 100 mA Per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 2000-V Human-body model (A114-A)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 2: –40°C to 105°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C4B
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Compatible with I2C and SMBus
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I2C devices and multiple controllers
  • Allows voltage-level translation between
    • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
    • 2.5-V VREF1 and 3.3-V, or 5-V VREF2
    • 3.3-V VREF1 and 5-V VREF2
  • Provides bidirectional voltage translation with no direction pin
  • Low 3.5-Ω ON-state connection between input and output ports provides less signal distortion
  • Open-drain I2C I/O Ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V tolerant I2C I/O ports to support mixed-mode signal operation
  • High-impedance SCL1, SDA1, SCL2, and SDA2 pins for EN = low
  • Lock-up-free operation for isolation when EN = Low
  • Flow-through pinout for ease of printed-circuit board trace routing
  • Latch-up performance exceeds 100 mA Per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 2000-V Human-body model (A114-A)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)

This dual bidirectional I2C and SMBus voltage-level translator, with an enable (EN) input, is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The PCA9306-Q1 allows bidirectional voltage translations between 1.2 V and 5 V, without the use of a direction pin. The low ON-state resistance (ron) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.

This dual bidirectional I2C and SMBus voltage-level translator, with an enable (EN) input, is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The PCA9306-Q1 allows bidirectional voltage translations between 1.2 V and 5 V, without the use of a direction pin. The low ON-state resistance (ron) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 PCA9306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet (Rev. C) PDF | HTML 2022/4/1
應用說明 Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 2024/7/3
Application brief Integrated vs. Discrete Open Drain Level Translation PDF | HTML 2024/1/9
功能安全資訊 PCA9306-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/8/2
應用說明 Choosing the Correct I2C Device for New Designs PDF | HTML 2016/9/7
應用說明 Understanding the I2C Bus PDF | HTML 2015/6/30
應用說明 Maximum Clock Frequency of I2C Bus Using Repeaters 2015/5/15
應用說明 I2C Bus Pull-Up Resistor Calculation PDF | HTML 2015/2/13

設計與開發

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開發板

PCA9306EVM — PCA9306 I2C 轉換器評估模組

此 EVM 可用於評估 DCU 封裝中的 PCA9306 產品。I2C 匯流排可透過 SDA_1、SCL_1、SDA_2 和 SCL_2 測試點輕鬆存取，並採用對稱配置以提供最佳效能。所有 IC 訊號都可透過測試點連接使用。
使用指南: PDF
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模擬型號

HSPICE MODEL OF PCA9306 (Rev. A)

SCEJ212 (81 KB) - HSpice 模型
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模擬型號

PCA9306 IBIS Model (Rev. A)

SCPM002 (183 KB) - IBIS 模型
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設計工具

I2C-DESIGNER — I2C 設計工具

使用 I2C 設計工具快速解決 I2C 設計中在定址、電壓位準和頻率方面的衝突。輸入主裝置和從屬裝置的參數，自動產生 I2C 樹狀結構，或輕鬆建置自訂解決方案。此工具將協助設計人員節省時間並符合 I2C 標準，提供關於偵錯缺失確認、選擇上拉電阻以及滿足 I2C 匯流排最大電容負載的指導。 
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參考設計

TIDA-00271 — 適用遠端攝影機和雷達模組的 ADAS 感測器互連參考設計基板

ADAS 感測器互連電路板適用於需要將攝影機、光達或雷達模組等遠端感測器連接至中央處理 ECU 的應用。電路板支援高達 3 個同軸和 1 個 LVDS 雙絞線資料輸入，以及 3 個 FMC 纜線和 1 個電路板至電路板連接器，以做為處理 ECU 的資料輸出。  透過同軸連接器（SMB 標準）連接的攝影機或其他感測器模組，直接透過互連板的同軸纜線（同軸電纜供電）供電。由於所有 IC 皆有獨立完整電源解決方案，且板載同軸纜線供電，因此單一汽車電池或類似寬電壓供應器可直接連接至 ADAS 感測器互連電路板上的電源接頭。板載 uC 和 LIN 介面可控制和配置互連電路板，以及隨插即用操作。

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