Overview
The PCF8575PWG4, produced by Texas Instruments, is a versatile remote 16-bit I/O expander designed to enhance the capabilities of microcontrollers through the I2C protocol. This component simplifies circuit design by allowing high-current drive outputs, such as LEDs, without the need for additional data-direction signals. It supports both 3.3V and 5V systems, making it compatible with a wide range of microcontroller architectures. The PCF8575PWG4 is particularly useful in various electronic applications due to its ability to streamline operations and minimize the need for auxiliary components.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage - Supply | 2.5V to 5.5V |
| Interface | I2C, SMBus |
| Number of Bits | 16 |
| Number of Outputs | 16 |
| Output Type | Push-Pull |
| Clock Frequency | 400 kHz |
| Supply Current - Max | 0.2 mA |
| Interrupt Output | Yes (Open-drain) |
| Current - Output Source/Sink | 10 mA / 25 mA |
| Pin Count | 24 |
| Package Type | SSOP, TVSOP, SOIC, TSSOP, VQFN |
| ESD Protection | Complies with JESD 22: 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- Remote I/O Expansion: Provides 16 individually addressable I/O pins for expanding the GPIO capabilities of microcontrollers.
- I2C and SMBus Compatibility: Supports both I2C and SMBus protocols with a clock frequency of up to 400 kHz.
- Voltage Compatibility: Operates with both 3.3V and 5V systems, enhancing compatibility with diverse microcontroller architectures.
- High-Current Drive Outputs: Capable of directly driving LEDs and other high-current devices without additional components.
- Interrupt Capability: Features an open-drain interrupt output for signaling changes in the input state.
- Low Standby Current: Consumes a maximum of 10 µA in standby mode, making it energy-efficient.
- Addressing Flexibility: Addressable via three hardware address pins, allowing up to 8 devices on the same bus.
Applications
- Telecommunications: Enhances equipment like filter units by extending GPIO capabilities, enabling precise control in signal processing environments.
- Server Infrastructures: Offers adaptable connections for high-demand settings, optimizing server designs with flexibility and scalability.
- Networking Routers: Expands device programmability and connectivity, aiding in the development of robust and adaptable routers.
- Personal Computing: Facilitates innovation in peripherals and enhancements without being constrained by system architecture limits.
- Consumer Electronics: Extends device features without major redesigns, enabling the introduction of state-of-the-art features in compact designs.
- Industrial Automation: Supports exceptional process control and monitoring, enhancing efficiency and reducing downtime in manufacturing settings.
Q & A
- What is the primary function of the PCF8575PWG4?
The PCF8575PWG4 is a remote 16-bit I/O expander designed to expand the GPIO capabilities of microcontrollers via the I2C protocol.
- What voltage ranges does the PCF8575PWG4 support?
The PCF8575PWG4 operates with supply voltages ranging from 2.5V to 5.5V.
- How many I/O pins does the PCF8575PWG4 have?
The PCF8575PWG4 has 16 individually addressable I/O pins.
- What is the maximum clock frequency of the I2C interface on the PCF8575PWG4?
The maximum clock frequency is 400 kHz.
- Does the PCF8575PWG4 have interrupt capabilities?
Yes, it features an open-drain interrupt output.
- How many devices can be addressed on the same I2C bus using the PCF8575PWG4?
Up to 8 devices can be addressed using the three hardware address pins.
- What is the standby current consumption of the PCF8575PWG4?
The maximum standby current consumption is 10 µA.
- Can the PCF8575PWG4 directly drive high-current devices like LEDs?
Yes, it can directly drive high-current devices like LEDs without additional components.
- What types of packages are available for the PCF8575PWG4?
The PCF8575PWG4 is available in SSOP, TVSOP, SOIC, TSSOP, and VQFN packages.
- Does the PCF8575PWG4 have ESD protection?
Yes, it complies with JESD 22 standards for ESD protection.
