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PCA9546A 具有复位功能的 4 通道 I2C 和 SMBus 多路复用器

The PCA9546A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four 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.

An active-low reset (RESET) input allows the PCA9546A to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.

The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9546A. This allows the use of different bus voltages on each pair, so that 1.8-V, 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 5.5-V tolerant

PCA9546A
tpd max(ns) 0.3,1
fSCLK(Max)(MHz) 100,400
VCC(Min)(V) 2.3
VCC(Max)(V) 5.5
Pin/Package 16SOIC, 16TSSOP, 16TVSOP, 16VQFN
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 4
Reset Input Yes
Simultaneously Active Channels 1 to 4
5V Tolerant I/O Yes
Open–Drain I/O Type Yes
PCA9546A 特性
PCA9546A 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
PCA9546AD ACTIVE -40 to 85 1.00 | 1ku SOIC (D) | 16 40 | TUBE  
PCA9546ADG4 ACTIVE -40 to 85 1.00 | 1ku SOIC (D) | 16 40 | TUBE  
PCA9546ADGVR ACTIVE -40 to 85 0.85 | 1ku TVSOP (DGV) | 16 2000 | LARGE T&R  
PCA9546ADGVRG4 ACTIVE -40 to 85 0.85 | 1ku TVSOP (DGV) | 16 2000 | LARGE T&R  
PCA9546ADR ACTIVE -40 to 85 0.85 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
PCA9546ADRG4 ACTIVE -40 to 85 0.85 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
PCA9546ADT ACTIVE -40 to 85 1.00 | 1ku SOIC (D) | 16 250 | SMALL T&R  
PCA9546ADTG4 ACTIVE -40 to 85 1.00 | 1ku SOIC (D) | 16 250 | SMALL T&R  
PCA9546ADW ACTIVE -40 to 85 1.00 | 1ku SOIC (DW) | 16 40 | TUBE  
PCA9546ADWG4 ACTIVE -40 to 85 1.00 | 1ku SOIC (DW) | 16 40 | TUBE  
PCA9546ADWR ACTIVE -40 to 85 0.85 | 1ku SOIC (DW) | 16 2000 | LARGE T&R  
PCA9546ADWRG4 ACTIVE -40 to 85 0.85 | 1ku SOIC (DW) | 16 2000 | LARGE T&R  
PCA9546APW ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 90 | TUBE  
PCA9546APWE4 ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 90 | TUBE  
PCA9546APWG4 ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 90 | TUBE  
PCA9546APWR ACTIVE -40 to 85 0.85 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R  
PCA9546APWRE4 ACTIVE -40 to 85 0.85 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R  
PCA9546APWRG4 ACTIVE -40 to 85 0.85 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R  
PCA9546APWT ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 250 | SMALL T&R  
PCA9546APWTE4 ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 250 | SMALL T&R  
PCA9546APWTG4 ACTIVE -40 to 85 1.00 | 1ku TSSOP (PW) | 16 250 | SMALL T&R  
PCA9546ARGVR ACTIVE -40 to 85 0.85 | 1ku VQFN (RGV) | 16 2500 | LARGE T&R  
PCA9546ARGVRG4 ACTIVE -40 to 85 0.85 | 1ku VQFN (RGV) | 16 2500 | LARGE T&R  
PCA9546ARGYR ACTIVE -40 to 85 0.85 | 1ku VQFN (RGY) | 16 3000 | LARGE T&R  
PCA9546ARGYRG4 ACTIVE -40 to 85 0.85 | 1ku VQFN (RGY) | 16 3000 | LARGE T&R  
PCA9546A 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
PCA9546AD Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546AD PCA9546AD
PCA9546ADG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADG4 PCA9546ADG4
PCA9546ADGVR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADGVR PCA9546ADGVR
PCA9546ADGVRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADGVRG4 PCA9546ADGVRG4
PCA9546ADR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADR PCA9546ADR
PCA9546ADRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADRG4 PCA9546ADRG4
PCA9546ADT Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADT PCA9546ADT
PCA9546ADTG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADTG4 PCA9546ADTG4
PCA9546ADW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADW PCA9546ADW
PCA9546ADWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADWG4 PCA9546ADWG4
PCA9546ADWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADWR PCA9546ADWR
PCA9546ADWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546ADWRG4 PCA9546ADWRG4
PCA9546APW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APW PCA9546APW
PCA9546APWE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWE4 PCA9546APWE4
PCA9546APWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWG4 PCA9546APWG4
PCA9546APWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWR PCA9546APWR
PCA9546APWRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWRE4 PCA9546APWRE4
PCA9546APWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWRG4 PCA9546APWRG4
PCA9546APWT Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWT PCA9546APWT
PCA9546APWTE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWTE4 PCA9546APWTE4
PCA9546APWTG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9546APWTG4 PCA9546APWTG4
PCA9546ARGVR Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9546ARGVR PCA9546ARGVR
PCA9546ARGVRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9546ARGVRG4 PCA9546ARGVRG4
PCA9546ARGYR Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9546ARGYR PCA9546ARGYR
PCA9546ARGYRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9546ARGYRG4 PCA9546ARGYRG4
PCA9546A 应用技术支持与电子电路设计开发资源下载
  1. PCA9546A 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)