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Product Overview
The TCA9546ADR from Texas Instruments is a low-voltage, 4-channel I2C bus switch/multiplexer with reset functionality. It allows multiple I2C devices with the same address to be connected to a single I2C bus 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, power-on reset, and three address pins allowing up to eight devices on the same bus.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage |
1.65V to 5.5V |
| Number of Channels |
4 |
| I2C Bus Voltage |
1.65V to 5.5V |
| Standby Current |
1 µA (max) |
| Operating Temperature |
-40°C to +85°C |
| Package |
16-SOIC |
| Reset Pin |
Active-low, internal pull-up |
| Address Pins |
3 (A0, A1, A2) |
| ESD Protection |
2 kV HBM |
Key Features
- 4-channel I2C bus switch/multiplexer
- Wide supply voltage range: 1.65V to 5.5V
- Low standby current: 1 µA max
- Active-low reset input
- Power-on reset disables all channels
- Three address pins for up to 8 devices
- Supports hot insertion
- Package: 16-SOIC
Target Applications
- 5G base station: Multiplexing I2C sensors for temperature and power monitoring
- Automotive dashboard: Connecting multiple display controllers with same I2C address
- Industrial PLC: Isolating I2C buses for different modules
- Server motherboard: Managing multiple I2C devices like EEPROMs and ADCs
- Consumer electronics: Smart home hubs with multiple I2C peripherals
Global Supply Chain & Wholesale Solutions
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TCA9546ADR. Our core advantages include:
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with full quality assurance and traceability.
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be authentic with strict quality control.
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environmental and safety standards.
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Original Factory Packaging: We maintain original factory packaging
and seals to ensure ESD protection and physical integrity.
產品概述
TCA9546ADR 是德州儀器(TI)推出的低電壓、4通道 I2C 匯流排開關/多路復用器,具有復位功能。它允許將具有相同 I2C 地址的多個設備連接到單一 I2C 匯流排,通過每次選擇一個通道來實現。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、上電復位以及三個地址引腳,允許同一匯流排上最多連接八個器件。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 |
1.65V 至 5.5V |
| 通道數 |
4 |
| I2C 匯流排電壓 |
1.65V 至 5.5V |
| 待機電流 |
1 µA(最大值) |
| 工作溫度 |
-40°C 至 +85°C |
| 封裝 |
16-SOIC |
| 復位引腳 |
低電平有效,內部上拉 |
| 地址引腳 |
3 個(A0, A1, A2) |
| ESD 保護 |
2 kV HBM |
核心特性
- 4 通道 I2C 匯流排開關/多路復用器
- 寬電源電壓範圍:1.65V 至 5.5V
- 低待機電流:最大 1 µA
- 低電平有效復位輸入
- 上電復位禁用所有通道
- 三個地址引腳,最多支持 8 個器件
- 支持熱插拔
- 封裝:16-SOIC
典型應用場景
- 5G 基站:多路復用溫度與電源監控的 I2C 傳感器
- 汽車儀表板:連接多個具有相同 I2C 地址的顯示控制器
- 工業 PLC:隔離不同模塊的 I2C 匯流排
- 服務器主板:管理多個 I2C 設備,如 EEPROM 和 ADC
- 消費電子:智能家居中樞,帶有多個 I2C 外設
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