Overview
The PCA8574D, produced by NXP USA Inc., is a remote 8-bit I/O expander designed for use with the two-wire bidirectional I²C-bus. This component provides general-purpose remote I/O expansion for most microcontroller families, enabling the addition of more I/O ports without the need for additional microcontroller pins. The PCA8574D is part of the PCA8574/74A series, which offers flexibility and reliability in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SO16 (Small Outline 16-pin) |
| Operating Voltage | 2.3V to 5.5V |
| I²C Clock Frequency | Up to 400 kHz |
| Number of I/O Ports | 8 |
| Interrupt Capability | Yes, active-low interrupt output |
| Temperature Range | -40°C to +85°C |
| RoHS Compliance | Yes, EU RoHS compliant |
| Pb-Free | Yes |
Key Features
- Remote 8-bit I/O expansion via I²C-bus
- Operating voltage range from 2.3V to 5.5V
- 400 kHz I²C-bus clock frequency
- Active-low interrupt output
- Low standby current
- Compatible with most microcontroller families
- Available in various package types, including SO16, TSSOP16, and SSOP20
Applications
The PCA8574D is suitable for a variety of applications where additional I/O ports are required without increasing the microcontroller pin count. These include:
- Industrial control systems
- Automotive systems
- Consumer electronics
- Medical devices
- Smart home devices
Q & A
- What is the PCA8574D used for?
The PCA8574D is used for remote 8-bit I/O expansion via the I²C-bus, allowing the addition of more I/O ports without increasing the microcontroller pin count. - What is the operating voltage range of the PCA8574D?
The operating voltage range is from 2.3V to 5.5V. - What is the maximum I²C clock frequency supported by the PCA8574D?
The maximum I²C clock frequency supported is up to 400 kHz. - Does the PCA8574D have an interrupt capability?
Yes, it has an active-low interrupt output. - What are the package types available for the PCA8574D?
The PCA8574D is available in SO16, TSSOP16, and SSOP20 package types. - Is the PCA8574D RoHS compliant?
Yes, the PCA8574D is EU RoHS compliant. - What is the temperature range for the PCA8574D?
The operating temperature range is from -40°C to +85°C. - Can the PCA8574D be used in automotive systems?
Yes, it can be used in automotive systems due to its robust specifications and compliance with automotive standards. - How many I/O ports does the PCA8574D provide?
The PCA8574D provides 8 I/O ports. - Is the PCA8574D Pb-free?
Yes, the PCA8574D is Pb-free.
