TCA9548AMRGER TI I2C Switch/Multiplexer | 24-VQFN (4x4) | 1.65V-5.5V, 8-Channel

Product Overview

The TCA9548AMRGER is a low-voltage, 8-channel I2C bus switch/multiplexer from Texas Instruments. It allows multiple I2C slave devices with the same address to be connected to a single I2C master by selectively enabling one channel at a time. Operating from 1.65V to 5.5V, it is ideal for voltage translation and bus isolation in mixed-voltage systems. The device features active-low reset input, three address pins (allowing up to 8 devices on the same bus), and pass-through support for SMBus protocols. Packaged in a compact 24-VQFN (4x4 mm), it is suitable for space-constrained applications.

Detailed Technical Specifications

Key Features

• 8-channel bidirectional I2C bus switch/multiplexer
• Wide supply voltage range: 1.65V to 5.5V
• Low standby current: 1 µA typical
• Active-low reset input for bus recovery
• Three address pins allow up to 8 devices on the same bus
• Pass-through support for SMBus protocols
• Power-up with all channels deselected
• Small 24-VQFN package (4x4 mm) for space-saving

Target Applications

• 5G base stations: Multiplexing I2C sensors for power management and temperature monitoring
• Automotive dashboard: Connecting multiple I2C display controllers and touch sensors
• Industrial automation: Isolating I2C buses for modular sensor arrays
• Data centers: Managing I2C devices in server blades and power distribution units
• Consumer electronics: Smart home hubs with multiple I2C peripherals

Global Supply Chain & Wholesale Solutions

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產品概述

TCA9548AMRGER 是德州儀器（TI）推出的低電壓8通道I2C匯流排開關/多工器。它允許將具有相同地址的多個I2C從設備連接到一個主設備，通過選擇性地啟用一個通道來實現。工作電壓範圍為1.65V至5.5V，非常適合混合電壓系統中的電壓轉換和匯流排隔離。該器件具有低電平有效復位輸入、三個地址引腳（允許同一匯流排上最多8個器件）以及對SMBus協議的透傳支援。採用緊湊的24-VQFN（4x4 mm）封裝，適用於空間受限的應用。

詳細技術參數

核心特性

• 8通道雙向I2C匯流排開關/多工器
• 寬電源電壓範圍：1.65V 至 5.5V
• 低待機電流：典型值1 µA
• 低電平有效復位輸入，用於匯流排恢復
• 三個地址引腳，同一匯流排上最多支援8個器件
• 支援SMBus協議透傳
• 上電時所有通道斷開
• 小型24-VQFN封裝（4x4 mm），節省空間

典型應用場景

• 5G基站：多工處理用於電源管理和溫度監控的I2C感測器
• 汽車儀表板：連接多個I2C顯示控制器和觸控感測器
• 工業自動化：隔離模組化感測器陣列的I2C匯流排
• 數據中心：管理伺服器刀片和電源分配單元中的I2C器件
• 消費電子：具有多個I2C外設的智慧家庭中樞

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