PCF8575是TI公司的一款I2CIO扩展器产品，PCF8575是具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器，本页介绍了PCF8575的产品说明、应用、特性等，并给出了与PCF8575相关的TI元器件型号供参考。
PCF8575 - 具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器 - I2CIO扩展器 - I2C - TI公司（Texas Instruments，德州仪器）
- I2C to Parallel-Port Expander
- Open-Drain Interrupt Output
- Low Standby-Current Consumption of 10μAMax
- Compatible With Most Microcontrollers
- 400-kHz 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 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model
- 200-V Machine Model
- 1000-V Charged-Device Model
- Telecom Shelters: Filter Units
- Servers
- Routers (Telecom Switching Equipment)
- Personal Computers
- Personal Electronics
- Industrial Automation
- Products with GPIO-Limited Processors
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 5.5-V 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.
| PART NUMBER | PACKAGE (PIN) | BODY SIZE (NOM) |
|---|---|---|
| PCF8575 | SSOP (24) | 8.20 mm × 5.30 mm |
| QSOP (24) | 8.65 mm × 3.90 mm | |
| TVSOP (24) | 5.00 mm × 4.50 mm | |
| SOIC (24) | 15.40 mm × 7.50 mm | |
| TSSOP (24) | 7.80 mm × 4.40 mm | |
| QFN (24) | 4.00 mm × 4.00 mm |
