PCA9509PGM,125

Product Overview

Category

PCA9509PGM,125 belongs to the category of integrated circuits (ICs).

Use

It is commonly used for controlling and driving I/O expanders in various electronic devices.

Characteristics

• PCA9509PGM,125 is a 16-bit I2C-bus/SMBus I/O expander.
• It provides general-purpose remote I/O expansion for most microcontroller families.
• The device features an internal interrupt generator.
• It supports hot insertion.
• It has low standby current consumption.

Package

PCA9509PGM,125 is available in a small package with 20 pins.

Essence

The essence of PCA9509PGM,125 lies in its ability to expand the input/output capabilities of microcontrollers through the I2C-bus/SMBus interface.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply voltage: 2.3V to 5.5V
• Operating temperature range: -40°C to +85°C
• I2C-bus frequency: Up to 400 kHz
• Number of I/O lines: 16
• Input/output voltage levels: 0V to VDD

Detailed Pin Configuration

1. SDA - Serial Data Line
2. SCL - Serial Clock Line
3. INT - Interrupt Output
4. A0 - Address Bit 0
5. A1 - Address Bit 1
6. A2 - Address Bit 2
7. RESET - Reset Input
8. GND - Ground
9. P00 - Port 0, Bit 0
10. P01 - Port 0, Bit 1
11. P02 - Port 0, Bit 2
12. P03 - Port 0, Bit 3
13. P04 - Port 0, Bit 4
14. P05 - Port 0, Bit 5
15. P06 - Port 0, Bit 6
16. P07 - Port 0, Bit 7
17. P10 - Port 1, Bit 0
18. P11 - Port 1, Bit 1
19. P12 - Port 1, Bit 2
20. VDD - Supply Voltage

Functional Features

• Bidirectional I/O lines with configurable pull-up resistors.
• Interrupt output for efficient communication with the microcontroller.
• Address pins for device addressing in multi-device applications.
• Reset input for resetting the device to its default state.
• Low standby current consumption for power efficiency.

Advantages and Disadvantages

Advantages

• Provides easy expansion of I/O capabilities for microcontrollers.
• Supports hot insertion, allowing devices to be added or removed without disrupting the system.
• Low standby current consumption helps conserve power.
• Internal interrupt generator enhances communication efficiency.

Disadvantages

• Limited number of I/O lines (16) may not be sufficient for certain applications requiring extensive I/O expansion.
• Requires an I2C-bus/SMBus interface for communication, which may limit compatibility with certain microcontrollers.

Working Principles

PCA9509PGM,125 operates by receiving commands and data from a microcontroller through the I2C-bus/SMBus interface. It then processes these commands and controls the I/O lines accordingly. The device can be addressed individually or as part of a multi-device configuration using the address pins. The internal interrupt generator allows efficient communication between the device and the microcontroller.

Detailed Application Field Plans

PCA9509PGM,125 finds application in various fields, including but not limited to: - Home automation systems - Industrial control systems - Automotive electronics - Consumer electronics - Internet of Things (IoT) devices

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to PCA9509PGM,125 are: - PCA9535PW,118 - MCP23017-E/SP - MAX7313ATG+ - TCA9554APWR

These alternative models can be considered based on specific requirements and compatibility with the target microcontroller.

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