TCA7408ZSZR - English Editing Encyclopedia Entry

Product Overview

Category

TCA7408ZSZR belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for input/output (I/O) expansion in various electronic devices and systems.

Characteristics

• TCA7408ZSZR is a high-performance, 8-bit I/O expander.
• It operates at a voltage range of 1.65V to 5.5V, making it suitable for a wide range of applications.
• The IC offers a low standby current consumption, ensuring energy efficiency.
• It provides 8 bidirectional I/O pins with configurable pull-up resistors.
• TCA7408ZSZR supports hot insertion and removal without causing any damage to the device or system.

Package and Quantity

The TCA7408ZSZR IC is available in a small-outline package (SOT) with a size of 20-pin WQFN. It is typically sold in reels containing a quantity of 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Number of I/O Pins: 8
• Operating Temperature Range: -40°C to +85°C
• Standby Current: 1 µA (maximum)
• Input/Output Voltage Levels: 0V to VDD
• Pull-Up Resistor Value: 10 kΩ (typical)

Detailed Pin Configuration

The TCA7408ZSZR IC has a total of 20 pins. The following table provides a detailed pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VDD | Power supply voltage | | 2 | GND | Ground reference | | 3 | SDA | Serial data input/output | | 4 | SCL | Serial clock input | | 5-12 | P0-P7 | Bidirectional I/O pins | | 13 | INT | Interrupt output | | 14 | A0 | Address input bit 0 | | 15 | A1 | Address input bit 1 | | 16 | A2 | Address input bit 2 | | 17 | RESET | Reset input | | 18-20 | NC | No connection |

Functional Features

• Bidirectional I/O Expansion: TCA7408ZSZR provides 8 additional I/O pins, allowing for increased connectivity and flexibility in electronic systems.
• Configurable Pull-Up Resistors: Each I/O pin can be individually configured with an internal pull-up resistor, simplifying circuit design and reducing external component count.
• Hot Insertion and Removal: The IC supports hot insertion and removal of devices without causing any damage, ensuring ease of use and system maintenance.

Advantages and Disadvantages

Advantages

• Wide voltage range allows compatibility with various systems.
• Low standby current consumption ensures energy efficiency.
• Configurable pull-up resistors simplify circuit design.
• Hot insertion and removal support enhances usability.

Disadvantages

• Limited number of I/O pins (8) may not be sufficient for complex applications requiring extensive connectivity.

Working Principles

TCA7408ZSZR operates as an I/O expander by utilizing the I2C (Inter-Integrated Circuit) communication protocol. It communicates with the master device (e.g., microcontroller) through the SDA (Serial Data) and SCL (Serial Clock) lines. The master device sends commands and data to the IC, which then controls the bidirectional I/O pins accordingly. The configurable pull-up resistors can be enabled or disabled as per the system requirements.

Detailed Application Field Plans

TCA7408ZSZR finds applications in various electronic systems, including but not limited to: - Consumer electronics - Industrial automation - Internet of Things (IoT) devices - Automotive electronics - Medical equipment - Communication systems

Detailed and Complete Alternative Models

1. PCA9538PW: 8-bit I/O expander with similar features and package.
2. MCP23008-E/SO: 8-bit I/O expander with I2C interface.
3. MAX7313AUG+: 16-bit I/O expander with higher pin count.

These alternative models offer comparable functionality and can be considered as alternatives to TCA7408ZSZR based on specific application requirements.

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