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PCA9539DBR
Product Overview
Category: Integrated Circuit (IC)
Use: The PCA9539DBR is a versatile 16-bit I2C-bus I/O expander designed for general-purpose input/output expansion applications. It provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion through the I2C-bus interface.
Characteristics: - 16-bit I/O expander - I2C-bus interface - Low standby current consumption - Schmitt-trigger action on all inputs - Open-drain interrupt output - Polarity inversion register - Noise filter on SCL/SDA inputs - Internal power-on reset
Package: The PCA9539DBR is available in a small 24-pin SSOP package, which makes it suitable for space-constrained applications.
Essence: The essence of PCA9539DBR lies in its ability to expand the number of GPIO pins available in a system, allowing for increased flexibility and control.
Packaging/Quantity: The PCA9539DBR is typically sold in reels of 2500 units per reel.
Specifications
- Supply Voltage Range: 2.3V to 5.5V
- I2C-bus Frequency: Up to 400 kHz
- Operating Temperature Range: -40°C to +85°C
- Standby Current Consumption: 1 μA (typical)
- Output Current: 25 mA per channel (maximum)
Detailed Pin Configuration
The PCA9539DBR has a total of 24 pins. The pin configuration is as follows:
```
| | | 1 24 | | | | 2 23 | | | | 3 22 | | | | 4 21 | | | | 5 20 | | | | 6 19 | | | | 7 18 | | | | 8 17 | | | | 9 16 | | | |10 15 | | | |11 14 | | | |12 13 | |_______________| ```
Functional Features
- I2C-bus interface allows for easy integration into existing systems.
- Schmitt-trigger action on all inputs ensures reliable input signal detection.
- Open-drain interrupt output provides a means of signaling events to the system.
- Polarity inversion register allows for flexible signal polarity configuration.
- Noise filter on SCL/SDA inputs helps mitigate signal integrity issues.
Advantages and Disadvantages
Advantages: - Provides additional GPIO pins for system expansion. - Low standby current consumption minimizes power usage. - Flexible configuration options enhance versatility. - Robust design with Schmitt-trigger action and noise filtering.
Disadvantages: - Limited output current per channel (25 mA maximum). - Requires an I2C-bus master device for communication.
Working Principles
The PCA9539DBR operates as an I/O expander by communicating with an I2C-bus master device. It receives commands and data from the master device and controls the state of its 16 GPIO pins accordingly. The I2C-bus interface allows for bidirectional communication, enabling both input and output functionality.
Detailed Application Field Plans
The PCA9539DBR can be used in various applications that require additional GPIO pins, such as: - Industrial automation systems - Consumer electronics - Automotive electronics - Internet of Things (IoT) devices - Robotics
Detailed and Complete Alternative Models
Some alternative models to the PCA9539DBR that offer similar functionality include: - MCP23017 - PCF8574 - MAX7313
These alternatives can be considered based on specific requirements and compatibility with existing systems.
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Liste 10 perguntas e respostas comuns relacionadas à aplicação de PCA9539DBR em soluções técnicas
Sure! Here are 10 common questions and answers related to the application of PCA9539DBR:
Q: What is PCA9539DBR? A: PCA9539DBR is a 16-bit I/O expander with interrupt output and I2C-bus/SMBus interface.
Q: What is the maximum voltage that PCA9539DBR can handle? A: PCA9539DBR can handle a maximum voltage of 5.5V.
Q: How many I/O pins does PCA9539DBR have? A: PCA9539DBR has 16 I/O pins that can be configured as inputs or outputs.
Q: Can PCA9539DBR be used for both input and output operations simultaneously? A: Yes, PCA9539DBR supports both input and output operations on its I/O pins.
Q: How can I control the I/O pins of PCA9539DBR? A: You can control the I/O pins of PCA9539DBR by writing to its internal registers using the I2C-bus/SMBus interface.
Q: Does PCA9539DBR support interrupt functionality? A: Yes, PCA9539DBR has an interrupt output pin that can be used to indicate changes in the status of its I/O pins.
Q: What is the maximum current that PCA9539DBR can sink/source on its I/O pins? A: PCA9539DBR can sink/source up to 25mA per I/O pin.
Q: Can PCA9539DBR be cascaded with other I/O expanders? A: Yes, PCA9539DBR can be cascaded with other I/O expanders to increase the number of I/O pins available.
Q: Does PCA9539DBR have built-in pull-up resistors? A: Yes, PCA9539DBR has programmable internal pull-up resistors that can be enabled/disabled for each I/O pin.
Q: What are some common applications of PCA9539DBR? A: PCA9539DBR is commonly used in applications such as LED displays, keypad interfaces, GPIO expansion, and general-purpose I/O control.
Please note that these answers are based on general knowledge about PCA9539DBR and may vary depending on the specific implementation and datasheet of the device.