PCF8575
- I2C to parallel-port expander
- Open-drain interrupt output
- Low standby-current consumption of 10µA maximum
- Compatible with most microcontrollers
- 400kHz Fast I2C bus
- Address by three hardware address pins for use of up to eight devices
- Latched outputs with high-current drive capability for directly driving LEDs
- Current source to VCC for actively driving a high at the output
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD Protection exceeds JESD 22
- 2000V Human-body model
- 200V Machine model
- 1000V Charged-device model
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5V to 5.5V VCC operation.
The PCF8575 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].
The device features a 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
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 | PCF8575 Remote16-BIT I2 C AND SMBus I/O Expander with Interrupt Output datasheet (Rev. I) | PDF | HTML | 2024/8/22 | ||
| 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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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
| SOIC (DW) | 24 | Ultra Librarian |
| TVSOP (DGV) | 24 | Ultra Librarian |
| SSOP (DBQ) | 24 | Ultra Librarian |
| SSOP (DB) | 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。