PCA9535
- Low standby-current consumption of 1 µA Max
- I2C to Parallel port expander
- Open-drain active-low interrupt output
- 5-V Tolerant I/O ports
- Compatible with most microcontrollers
- 400-kHz Fast I2C Bus
- Address by three hardware address pins for use of up to eight devices
- Polarity inversion register
- Latched outputs with high-current drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA Per JESD 78, class II
- ESD Protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 1000-V Charged-device model (C101)
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9535 can remain a simple slave device.
The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low current consumption.
Although pin-to-pin and I2C address compatible with the PCF8575, software changes are required due to the enhancements.
The PCA9535 is identical to the PCA9555, except for the removal of the internal I/O pullup resistor, which greatly reduces power consumption when the I/Os are held low.
Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus. The fixed I2C address of the PCA9535 is the same as the PCA9555, PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | PCA9535 Remote 16-BIT I2C and SMBus Low-Power I/O Expander With Interrupt Output and Configuration Registers datasheet (Rev. K) | PDF | HTML | 2021/3/11 | ||
| 應用說明 | I2C: What is the Auto Increment Feature? | PDF | HTML | 2024/7/5 | |||
| 應用說明 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024/7/3 | |||
| 應用說明 | I2C Dynamic Addressing | 2019/4/25 | ||||
| 應用說明 | Choosing the Correct I2C Device for New Designs | PDF | HTML | 2016/9/7 | |||
| 應用說明 | Understanding the I2C Bus | PDF | HTML | 2015/6/30 | |||
| 應用說明 | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015/5/15 | ||||
| 應用說明 | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015/2/13 |
設計與開發
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I2C-DESIGNER — I2C 設計工具
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SSOP (DBQ) | 24 | Ultra Librarian |
| TVSOP (DGV) | 24 | Ultra Librarian |
| SSOP (DB) | 24 | Ultra Librarian |
| TSSOP (PW) | 24 | Ultra Librarian |
| SOIC (DW) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
| WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
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。