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
- 1-of-8 Bidirectional Translating Switches
- I2C Bus and SMBus Compatible
- Active-Low Reset Input
- Address by Three Hardware Address Pins for Use of up to Eight Devices
- Channel Selection Via I2C Bus
- Power-Up With All Switch Channels Deselected
- Low rON Switches
- Allows Voltage-Level Translation Between 2.5-V, 3.3-V, and 5-V Buses
- No Glitch on Power Up
- Supports Hot Insertion
- Low Standby Current
- Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
- 5-V-Tolerant Inputs
- 400-kHz Fast I2C Bus
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)
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
- PCA9548A 数据资料 dataSheet 下载.PDF
- TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
- Logic Guide 2009 (PDF 4263 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)