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PCA9548A 具有复位功能的 8 通道 I2C 开关

The PCA9548A has eight bidirectional translating switches that can be controlled via the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

The system master can reset the PCA9548A in the event of a timeout or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset/initialization to occur without depowering the part.

The pass gates of the switches are constructed so that the VCC pin can be used to limit the maximum high voltage, which is passed by the PCA9548A. This allows the use of different bus voltages on each pair, so that 2.5-V or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant

PCA9548A
Technology Family PCA
fSCLK(Max)(MHz) 100,400
VCC(Min)(V) 2.3
VCC(Max)(V) 5.5
Pin/Package 24SOIC, 24VQFN, 24SSOP, 24TSSOP, 24TVSOP
Operating Temperature Range(°C) -40 to 85
Max Frequency(kHz) 400
I2C Address 1110 xxx
Vcc range(V) 2.3 to 5.5
Channel Width 8
Reset Input Yes
Simultaneously Active Channels 1 to 8
5V Tolerant I/O Yes
Open–Drain I/O Type Yes
PCA9548A 特性
PCA9548A 芯片订购指南
器件 状态 温度 价格 封装 | 引脚 封装数量 | 封装载体 丝印标记
PCA9548ADB ACTIVE -40 to 85 1.35 | 1ku SSOP (DB) | 24 60 | TUBE  
PCA9548ADBG4 ACTIVE -40 to 85 1.35 | 1ku SSOP (DB) | 24 60 | TUBE  
PCA9548ADBR ACTIVE -40 to 85 1.15 | 1ku SSOP (DB) | 24 2000 | LARGE T&R  
PCA9548ADBRG4 ACTIVE -40 to 85 1.15 | 1ku SSOP (DB) | 24 2000 | LARGE T&R  
PCA9548ADGVR ACTIVE -40 to 85 1.15 | 1ku TVSOP (DGV) | 24 2000 | LARGE T&R  
PCA9548ADGVRG4 ACTIVE -40 to 85 1.15 | 1ku TVSOP (DGV) | 24 2000 | LARGE T&R  
PCA9548ADW ACTIVE -40 to 85 1.35 | 1ku SOIC (DW) | 24 25 | TUBE  
PCA9548ADWG4 ACTIVE -40 to 85 1.35 | 1ku SOIC (DW) | 24 25 | TUBE  
PCA9548ADWR ACTIVE -40 to 85 1.15 | 1ku SOIC (DW) | 24 2000 | LARGE T&R  
PCA9548ADWRG4 ACTIVE -40 to 85 1.15 | 1ku SOIC (DW) | 24 2000 | LARGE T&R  
PCA9548APW ACTIVE -40 to 85 1.35 | 1ku TSSOP (PW) | 24 60 | TUBE  
PCA9548APWG4 ACTIVE -40 to 85 1.35 | 1ku TSSOP (PW) | 24 60 | TUBE  
PCA9548APWR ACTIVE -40 to 85 1.15 | 1ku TSSOP (PW) | 24 2000 | LARGE T&R  
PCA9548APWRG4 ACTIVE -40 to 85 1.15 | 1ku TSSOP (PW) | 24 2000 | LARGE T&R  
PCA9548ARGER ACTIVE -40 to 85 1.15 | 1ku VQFN (RGE) | 24 3000 | LARGE T&R  
PCA9548ARGERG4 ACTIVE -40 to 85 1.15 | 1ku VQFN (RGE) | 24 3000 | LARGE T&R  
PCA9548A 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
PCA9548ADB Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADB PCA9548ADB
PCA9548ADBG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADBG4 PCA9548ADBG4
PCA9548ADBR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADBR PCA9548ADBR
PCA9548ADBRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADBRG4 PCA9548ADBRG4
PCA9548ADGVR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADGVR PCA9548ADGVR
PCA9548ADGVRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADGVRG4 PCA9548ADGVRG4
PCA9548ADW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADW PCA9548ADW
PCA9548ADWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADWG4 PCA9548ADWG4
PCA9548ADWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADWR PCA9548ADWR
PCA9548ADWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548ADWRG4 PCA9548ADWRG4
PCA9548APW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548APW PCA9548APW
PCA9548APWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548APWG4 PCA9548APWG4
PCA9548APWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548APWR PCA9548APWR
PCA9548APWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9548APWRG4 PCA9548APWRG4
PCA9548ARGER Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9548ARGER PCA9548ARGER
PCA9548ARGERG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9548ARGERG4 PCA9548ARGERG4
PCA9548A 应用技术支持与电子电路设计开发资源下载
  1. PCA9548A 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
  3. Logic Guide 2009 (PDF 4263 KB)
  4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
  6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
  7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
  8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
  9. Designing With Logic (PDF 186 KB)
  10. Live Insertion (PDF 150 KB)
  11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
  12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
  13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  14. LOGIC Pocket Data Book (PDF 6001 KB)
  15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  16. Logic Cross-Reference (PDF 2938 KB)