TCA6408AQPWRQ1

Overview

Product Category

TCA6408AQPWRQ1 belongs to the category of integrated circuits (ICs) and specifically falls under the family of I/O expanders.

Use

The TCA6408AQPWRQ1 is primarily used for expanding the input/output (I/O) capabilities of microcontrollers or other digital systems. It provides additional general-purpose I/O pins, allowing for increased connectivity and flexibility in various applications.

Characteristics

• 8-bit I/O expander
• Low power consumption
• Wide operating voltage range
• High-speed I2C interface
• Schmitt-trigger inputs for noise immunity
• Open-drain outputs with configurable polarity
• ESD protection on all pins

Package

TCA6408AQPWRQ1 is available in a small-sized, surface-mount package known as TSSOP (Thin Shrink Small Outline Package). This package offers excellent thermal performance and ease of integration onto printed circuit boards (PCBs).

Essence

The essence of TCA6408AQPWRQ1 lies in its ability to provide additional I/O pins, enabling designers to overcome limitations imposed by the limited number of I/O pins on microcontrollers or other digital devices.

Packaging/Quantity

The TCA6408AQPWRQ1 is typically sold in reels containing a specified quantity of ICs. The exact quantity may vary depending on the manufacturer or distributor.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• I2C Bus Frequency: Up to 400kHz
• Number of I/O Pins: 8
• Output Current: 4mA per pin (maximum)

Detailed Pin Configuration

The TCA6408AQPWRQ1 has a total of 20 pins, each serving a specific purpose. The pin configuration is as follows:

1. VCC
2. SDA (I2C Data)
3. SCL (I2C Clock)
4. INT (Interrupt Output)
5. RESET (Reset Input)
6. P0 (General Purpose I/O Pin 0)
7. P1 (General Purpose I/O Pin 1)
8. P2 (General Purpose I/O Pin 2)
9. P3 (General Purpose I/O Pin 3)
10. GND (Ground)
11. P4 (General Purpose I/O Pin 4)
12. P5 (General Purpose I/O Pin 5)
13. P6 (General Purpose I/O Pin 6)
14. P7 (General Purpose I/O Pin 7)
15. A0 (Address Select Bit 0)
16. A1 (Address Select Bit 1)
17. A2 (Address Select Bit 2)
18. NC (No Connection)
19. NC (No Connection)
20. NC (No Connection)

Functional Features

I/O Expansion

The TCA6408AQPWRQ1 provides an additional 8 general-purpose I/O pins, allowing for increased connectivity and flexibility in various applications. These pins can be configured as inputs or outputs based on the system requirements.

I2C Interface

The device utilizes the popular I2C communication protocol, enabling seamless integration with microcontrollers and other digital systems. The high-speed I2C interface supports data transfer rates of up to 400kHz.

Polarity Configuration

The open-drain outputs of the TCA6408AQPWRQ1 can be configured with inverted or non-inverted polarity. This feature enhances compatibility with different system architectures and simplifies signal level translation.

Noise Immunity

Schmitt-trigger inputs are incorporated into the design of the TCA6408AQPWRQ1, providing improved noise immunity. This ensures reliable operation even in environments with high levels of electrical noise.

Advantages and Disadvantages

Advantages

• Provides additional I/O pins for system expansion
• Low power consumption
• Wide operating voltage range allows compatibility with various systems
• High-speed I2C interface enables fast data transfer
• Schmitt-trigger inputs enhance noise immunity
• ESD protection on all pins safeguards against electrostatic discharge

Disadvantages

• Limited to 8-bit I/O expansion, may not be sufficient for certain applications requiring a higher number of I/O pins
• Requires an external microcontroller or digital system for control and communication

Working Principles

The TCA6408AQPWRQ1 operates by receiving commands and data through the I2C bus from a master device, typically a microcontroller. It interprets these commands to configure the I/O pins as either inputs or outputs. The state of each pin can be read or set individually using the I2C interface. The device also generates an interrupt signal (INT) to