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PCA9538PW
Product Overview
Category
The PCA9538PW belongs to the category of I2C-bus controlled 8-bit I/O expander for open-drain outputs.
Use
It is used to provide general-purpose remote I/O expansion for most microcontroller families via the I2C-bus interface.
Characteristics
- 5 V tolerant I/Os
- Low standby current
- Operating power supply voltage range of 2.3 V to 5.5 V
- Compatible with most microcontrollers
- Open-drain active-low interrupt output
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
Package
The PCA9538PW comes in a TSSOP24 package.
Essence
The essence of PCA9538PW lies in its ability to provide a simple solution when additional I/Os are needed while minimizing microcontroller pin usage.
Packaging/Quantity
The PCA9538PW is typically available in reels with a quantity of 2500 units per reel.
Specifications
- Operating Voltage: 2.3 V to 5.5 V
- Number of I/Os: 8
- I2C-bus Address: Three hardware address pins allow eight devices on the same bus
- Standby Current: 1 µA (max)
- Operating Temperature Range: -40°C to +85°C
Detailed Pin Configuration
The detailed pin configuration of PCA9538PW can be found in the datasheet provided by the manufacturer.
Functional Features
- Software reset feature allows the device to be reset through the I2C-bus
- Noise filter on SCL/SDA inputs
- Polarity inversion register to configure the polarity of the input port data
Advantages and Disadvantages
Advantages
- Simplifies I/O expansion of microcontrollers
- Low standby current
- Wide operating voltage range
Disadvantages
- Limited number of I/Os (8)
Working Principles
The PCA9538PW operates by communicating with the microcontroller through the I2C-bus interface, allowing the microcontroller to control the I/Os and monitor the interrupt output.
Detailed Application Field Plans
The PCA9538PW finds applications in various fields such as: - Industrial automation - Consumer electronics - Automotive - Internet of Things (IoT) devices
Detailed and Complete Alternative Models
Some alternative models to PCA9538PW include: - PCA9554PW: 8-bit I2C-bus and SMBus I/O port with interrupt - MCP23008: 8-bit I/O expander with serial interface
In conclusion, the PCA9538PW offers a convenient solution for expanding the I/O capabilities of microcontrollers, making it suitable for a wide range of applications across different industries.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng PCA9538PW trong giải pháp kỹ thuật
What is PCA9538PW?
- PCA9538PW is an 8-bit I2C-bus and SMBus I/O expander designed for 2.3 V to 5.5 V VCC operation.
What are the key features of PCA9538PW?
- The key features include 5V tolerant I/Os, open-drain outputs, and a hardware address pin for using up to 4 devices on the same bus.
How many I/O pins does PCA9538PW have?
- PCA9538PW has 8 I/O pins.
What is the maximum frequency supported by PCA9538PW?
- The maximum frequency supported by PCA9538PW is 400 kHz.
Can PCA9538PW be used in automotive applications?
- Yes, PCA9538PW is suitable for automotive applications due to its wide operating voltage range.
What are the typical applications of PCA9538PW?
- Typical applications include driving LEDs and providing digital I/O expansion for microcontroller systems.
Does PCA9538PW support hot insertion?
- Yes, PCA9538PW supports hot insertion.
What is the power supply range for PCA9538PW?
- The power supply range for PCA9538PW is 2.3 V to 5.5 V.
Is PCA9538PW compatible with both I2C and SMBus interfaces?
- Yes, PCA9538PW is compatible with both I2C and SMBus interfaces.
What are the available package options for PCA9538PW?
- PCA9538PW is available in TSSOP and SO packages.