PCA9515A 双路双向 I2C 总线和 SMBus 中继器
This dual bidirectional I2C buffer is operational at 2.3-V to 3.6-V VCC.
The PCA9515A is a BiCMOS integrated circuit intended for I2C bus and SMBus systems applications. The device contains two identical bidirectional open-drain buffer circuits that enable I2C and similar bus systems to be extended without degradation of system performance.
The PCA9515A buffers both the serial data (SDA) and serial clock (SCL) signals on the I2C bus, while retaining all the operating modes and features of the I2C system. This enables two buses of 400-pF bus capacitance to be connected in an I2C application.
The I2C bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9515A enables the system designer to isolate two halves of a bus, accommodating more I2C devices or longer trace lengths.
The PCA9515A has an active-high enable (EN) input with an internal pullup, which allows the user to select when the repeater is active. This can be used to isolate a badly behaved slave on power-up reset. It never should change state during an I2C operation, because disabling during a bus operation hangs the bus, and enabling part way through a bus cycle could confuse the I2C parts being enabled. The EN input should change state only when the global bus and the repeater port are in an idle state, to prevent system failures.
The PCA9515A also can be used to run two buses: one at 5-V interface levels and the other at 3.3-V interface levels, or one at 400-kHz operating frequency and the other at 100-kHz operating frequency. If the two buses are operating at different frequencies, the 100-kHz bus must be isolated when the 400-kHz operation of the other bus is required. If the master is running at 400 kHz, the maximum system operating frequency may be less than 400 kHz, because of the delays that are added by the repeater
| PCA9515A | |
| No. of Outputs | 2 |
| VCC(Min)(V) | 2.3 |
| VCC(Max)(V) | 3.6 |
| Pin/Package | 8MSOP, 8PDIP, 8SOIC, 8SON, 8TSSOP |
| Max Frequency(kHz) | 400 |
| Vcc range(V) | 2.3 to 5.5 |
| Channel Width | 2 |
| Master Side I2C Bus Capacitance Supported(pF) | 400 |
| Slave Side I2C Bus Capacitance Supported(pF) | 400 |
| 5V Tolerant I/O | Yes |
| Open–Drain I/O Type | Yes |
| Enable Pin | Yes |
PCA9515A 特性
- Two-Channel Bidirectional Buffers
- I2C Bus and SMBus Compatible
- Active-High Repeater-Enable Input
- Open-Drain I2C I/O
- 5.5-V Tolerant I2C I/O and Enable Input Support Mixed-Mode Signal Operation
- Lockup-Free Operation
- Accommodates Standard Mode and Fast Mode I2C Devices and Multiple Masters
- Powered-Off High-Impedance I2C Pins
- 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)
PCA9515A 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 |
| PCA9515AD | ACTIVE | -40 to 85 | 1.90 | 1ku | SOIC (D) | 8 | 75 | TUBE | |
| PCA9515ADG4 | ACTIVE | -40 to 85 | 1.90 | 1ku | SOIC (D) | 8 | 75 | TUBE | |
| PCA9515ADGKR | ACTIVE | -40 to 85 | 1.60 | 1ku | MSOP (DGK) | 8 | 2500 | LARGE T&R | |
| PCA9515ADGKRG4 | ACTIVE | -40 to 85 | 1.60 | 1ku | MSOP (DGK) | 8 | 2500 | LARGE T&R | |
| PCA9515ADR | ACTIVE | -40 to 85 | 1.60 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | |
| PCA9515ADRG4 | ACTIVE | -40 to 85 | 1.60 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | |
| PCA9515AP | ACTIVE | -40 to 85 | 1.60 | 1ku | PDIP (P) | 8 | 50 | TUBE | |
| PCA9515APE4 | ACTIVE | -40 to 85 | 1.60 | 1ku | PDIP (P) | 8 | 50 | TUBE | |
| PCA9515APW | ACTIVE | -40 to 85 | 1.90 | 1ku | TSSOP (PW) | 8 | 150 | TUBE | |
| PCA9515APWG4 | ACTIVE | -40 to 85 | 1.90 | 1ku | TSSOP (PW) | 8 | 150 | TUBE | |
| PCA9515APWR | ACTIVE | -40 to 85 | 1.60 | 1ku | TSSOP (PW) | 8 | 2000 | LARGE T&R | |
| PCA9515APWRG4 | ACTIVE | -40 to 85 | 1.60 | 1ku | TSSOP (PW) | 8 | 2000 | LARGE T&R |
PCA9515A 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 |
| PCA9515AD | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515AD | PCA9515AD |
| PCA9515ADG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515ADG4 | PCA9515ADG4 |
| PCA9515ADGKR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515ADGKR | PCA9515ADGKR |
| PCA9515ADGKRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515ADGKRG4 | PCA9515ADGKRG4 |
| PCA9515ADR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515ADR | PCA9515ADR |
| PCA9515ADRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515ADRG4 | PCA9515ADRG4 |
| PCA9515AP | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | PCA9515AP | PCA9515AP |
| PCA9515APE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | PCA9515APE4 | PCA9515APE4 |
| PCA9515APW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515APW | PCA9515APW |
| PCA9515APWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515APWG4 | PCA9515APWG4 |
| PCA9515APWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515APWR | PCA9515APWR |
| PCA9515APWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9515APWRG4 | PCA9515APWRG4 |
PCA9515A 应用技术支持与电子电路设计开发资源下载
- PCA9515A 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)