TCA9538DBR

Product Overview

Category

TCA9538DBR belongs to the category of integrated circuits (ICs).

Use

It is primarily used for input/output (I/O) expansion in various electronic devices.

Characteristics

• TCA9538DBR is a 16-pin IC with 8 I/O ports.
• It operates at a voltage range of 1.65V to 5.5V.
• The device supports both 2-wire and SMBus compatible interfaces.
• It offers programmable polarity inversion for input pins.
• TCA9538DBR has a low standby current consumption, making it suitable for battery-powered applications.

Package

The TCA9538DBR IC is available in a small outline package (SOIC) with 16 pins.

Essence

The essence of TCA9538DBR lies in its ability to expand the number of I/O ports in electronic devices, providing flexibility in connecting external components.

Packaging/Quantity

TCA9538DBR is typically sold in reels or tubes, with each reel containing 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Number of I/O Ports: 8
• Interface: 2-wire, SMBus compatible
• Standby Current: 1 µA (max)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

The pin configuration of TCA9538DBR is as follows:

| Pin No. | Pin Name | Description | |---------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3 | A0 | Address Input | | 4-11 | P0-P7 | I/O Ports | | 12 | INT | Interrupt Output | | 13 | RESET | Reset Input | | 14 | VCC | Supply Voltage | | 15 | GND | Ground | | 16 | NC | No Connection |

Functional Features

1. I/O Expansion: TCA9538DBR provides additional I/O ports, allowing for increased connectivity options in electronic devices.
2. Programmable Polarity Inversion: The device supports polarity inversion for input pins, enhancing flexibility in signal processing.
3. Low Standby Current: With a maximum standby current of 1 µA, TCA9538DBR is suitable for power-sensitive applications.
4. Wide Voltage Range: The IC operates within a voltage range of 1.65V to 5.5V, accommodating various power supply configurations.

Advantages and Disadvantages

Advantages

• Enables easy expansion of I/O ports in electronic devices.
• Supports programmable polarity inversion for enhanced signal processing.
• Low standby current consumption makes it ideal for battery-powered applications.
• Wide operating voltage range provides flexibility in power supply configurations.

Disadvantages

• Limited number of I/O ports (8) may not be sufficient for certain applications requiring extensive connectivity.
• Lack of built-in protection features against voltage spikes or ESD events.

Working Principles

TCA9538DBR functions as an I/O expander by utilizing the 2-wire or SMBus compatible interface. It communicates with the host microcontroller through the SDA (Serial Data) and SCL (Serial Clock) lines. The device can be addressed using the A0 pin, allowing multiple TCA9538DBR ICs to coexist on the same bus.

The I/O ports (P0-P7) can be configured as either inputs or outputs. The polarity of the input pins can be inverted programmatically, providing flexibility in signal processing. The INT (Interrupt) pin can be used to notify the host microcontroller about changes in the input states.

Detailed Application Field Plans

TCA9538DBR finds applications in various fields, including but not limited to:

1. Consumer Electronics: Used for I/O expansion in smart home devices, remote controls, and audio/video equipment.
2. Industrial Automation: Enables connectivity expansion in industrial control systems, PLCs, and sensor networks.
3. Automotive: Utilized for I/O expansion in automotive electronics, such as infotainment systems and dashboard controls.
4. Medical Devices: Provides additional I/O ports in medical equipment, facilitating data acquisition and control functions.
5. Internet of Things (IoT): Supports I/O expansion in IoT devices, allowing seamless integration with other connected devices.

Detailed and Complete Alternative Models

1. PCA9555PW: Similar to TCA9538DBR, this IC offers 16 I/O ports