PCF8575DBRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: High-speed, 16-bit remote I/O expander for I2C-bus applications
• Package: 24-pin SSOP (Shrink Small Outline Package)
• Essence: The PCF8575DBRG4 is a versatile I/O expander that provides easy interfacing between microcontrollers and various peripheral devices.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2.5V to 6V
• I/O Voltage: 0V to VDD
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Interface: Compatible with I2C-bus Fast-mode and Standard-mode
• Interrupt Output: Active LOW interrupt output
• Input/Output Configuration: 16 programmable I/O pins
• Current Consumption: Low standby current of 10µA maximum

Detailed Pin Configuration

The PCF8575DBRG4 has a total of 24 pins. The pin configuration is as follows:

1. A0: Address input bit 0
2. A1: Address input bit 1
3. A2: Address input bit 2
4. P0: I/O port 0
5. P1: I/O port 1
6. P2: I/O port 2
7. P3: I/O port 3
8. P4: I/O port 4
9. P5: I/O port 5
10. P6: I/O port 6
11. P7: I/O port 7
12. INT: Interrupt output
13. SDA: Serial data input/output
14. SCL: Serial clock input
15. GND: Ground
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. VDD: Supply voltage
21. P15: I/O port 15
22. P14: I/O port 14
23. P13: I/O port 13
24. P12: I/O port 12

Functional Features

• Provides 16 programmable I/O pins for versatile interfacing options
• Compatible with both Fast-mode (400kHz) and Standard-mode (100kHz) I2C-bus interfaces
• Low standby current consumption ensures energy efficiency
• Active LOW interrupt output allows for efficient event-driven programming
• Wide operating temperature range enables usage in various environments

Advantages and Disadvantages

Advantages

• Simplifies microcontroller interfacing with peripheral devices
• Offers flexibility in expanding I/O capabilities of microcontrollers
• Low power consumption enhances energy efficiency
• Supports interrupt-driven programming for efficient event handling

Disadvantages

• Limited to 16 I/O pins, may not be suitable for applications requiring a higher number of I/Os
• Requires knowledge of I2C-bus protocol for proper integration

Working Principles

The PCF8575DBRG4 operates as an I/O expander by utilizing the I2C-bus interface. It communicates with the microcontroller through the SDA (serial data) and SCL (serial clock) lines. The microcontroller sends commands and data to the PCF8575DBRG4, which then controls the corresponding I/O pins based on the received instructions.

Detailed Application Field Plans

The PCF8575DBRG4 finds applications in various fields where additional I/O pins are required. Some potential application areas include:

1. Industrial automation: Used for interfacing sensors, actuators, and control devices in manufacturing processes.
2. Home automation: Enables connectivity with home appliances, lighting systems, and security devices.
3. Automotive electronics: Facilitates communication between microcontrollers and vehicle subsystems such as infotainment systems and climate control.
4. Internet of Things (IoT): Integrates with IoT devices to expand their I/O capabilities and enable seamless connectivity.

Detailed and Complete Alternative Models

• PCF8574: 8-bit remote I/O expander
• MCP23017: 16-bit I/O expander with serial interface
• MAX7313: 16-bit I/O expander with interrupt output
• PCA9538: 8-bit I/O expander with hardware address pins

These alternative models offer similar functionality and can be considered based on specific project requirements.

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