TCA9548A-Q1
- AEC-Q100 (grade 1): Qualified for automotive applications
- Functional Safety-Capable
- 1-to-8 Bidirectional translating switches
- I 2C Bus and SMBus compatible
- Active-low reset input
- Three address pins, allowing up to eight TCA9548A-Q1 devices on the I 2C bus
- Channel selection through an I 2C Bus, in any combination
- Power up with all switch channels deselected
- Low R ON switches
- Allows voltage-level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
- No glitch on power up
- Supports hot insertion
- Low quiescent current
- Operating power-supply voltage range of 1.65 V to 5.25 V
- 5 V tolerant Inputs
- 0 to 400 kHz clock frequency
- Latch-up performance exceeds 100 mA per JESD 78, class II
The TCA9548A-Q1 device has eight bidirectional translating switches that can be controlled through the I 2C 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. These downstream channels can be used to resolve I 2C target address conflicts. For example, if eight identical digital temperature sensors are needed in the application, one sensor can be connected at each channel: 0-7.
The system controller can reset the TCA9548A-Q1 in the event of a time-out or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I 2C/SMBus state machine. Asserting RESET causes the same reset and initialization to occur without powering down the part. This allows recovery should one of the downstream I 2C buses get stuck in a low state.
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 TCA9548A-Q1. Limiting the maximum high voltage 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 pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | TCA9548A-Q1 Automotive 8-Channel I2C Switch with Reset datasheet (Rev. C) | PDF | HTML | 2023年 6月 9日 |
Application note | I2C Solutions for Hot Swap Applications (Rev. A) | 2023年 1月 31日 | ||
Functional safety information | TCA9548A-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2021年 2月 22日 |
設計與開發
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TCA9548AEVM — TCA9548A I2C 1 對 8 雙向轉換開關評估模組
The TCA9548AEVM is designed to evaluate and demonstrate the functionality of TI’s TCA954xA family of I2C switches. The TCA9548AEVM can be used as a standalone evaluation module to interface with an existing system or paired with the MSP430 Lauchpad which serves as the I2C master and power supply (...)
I2C-DESIGNER — I2C 設計工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
VQFN (RGE) | 24 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。