AW9548QNR

AW9548 带复位功能的 8 通道 I2C 总线开关

参考价格
  • 1-99¥6.46
  • 100-249¥5.30
  • 250-499¥4.26
  • 500-999¥3.36
  • 1000+¥2.58

产品详细信息

参数

Channel 8
Addresses 8
Reset √
Interrupt ×
I2C Frequency(kHZ) 400
Temperature -40℃~125℃
Power Supply (Min) (V) 1.65
Power Supply (Max) (V) 5.5
Package (mm) QFN 4X4-24L

封装 | 引脚 | 尺寸

QFN 4X4-24L

特性

 1 对 8 双向电平转换开关  兼容 I2C 总线和 SMBus  低电平有效复位输入  三个地址引脚,允许在 I2C 总线上连接多达八个 AW9548 器件  通过 I2C 总线以任意组合方式选择通道  上电时所有开关通道均处于未选中状态  低导通电阻(RON)开关  400kHz I2C 接口  支持 1.8V、2.5V、3.3V 和 5V 总线之间的电压电平转换  1.65V~5.5V 电源供电  5.5V 耐压输入  上电无毛刺  支持热插拔  低待机电流  封装  AW9548TSR:TSSOP-24L  AW9548QNR:QFN 4X4-24L

说明

The AW9548 is an 8-channel, bidirectional translating switch that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. The device offers an active-low RESETN input which resets the state machine and allows the AW9548 to recover from a situation where one of the downstream I2C buses get stuck in a low state. The state machine of the device can also be reset by cycling the power supply, VCC, also known as a power-on reset (POR). Both the RESETN function and a POR cause all channels to be deselected and initializes the I2C/SMBus state machine. The pass-gate transistors of the AW9548 are constructed so that the VCC pin can be used to limit the maximum high voltage which is passed by the AW9548. Limiting the maximum high voltage allows the use of different bus voltages on each pair, so that 1.8V or 2.5V or 3.3V parts can communicate with 5V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5.5V tolerant.

技术文档

类型
项目标题
语言
日期
产品设计指南 AW9546/AW9548 硬件设计指南 中文   2024-11-04
产品设计指南 AW9545_AW9546_AW9548_Hardware_Design_Guide 中文   2025-09-28
产品设计指南 AW954X Hardware Design Guide 中文   2026-06-17
产品手册 DS_AW9548_CN_V1.3 中文   2026-09-20
产品手册 DS_AW9548_EN_V1.3 英文   2026-09-20

设计和开发

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