Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| ProductStatus | Active |
| NumberofI/O | 8 |
| Interface | I²C, SMBus |
| InterruptOutput | Yes |
| Features | POR |
| OutputType | Push-Pull |
| Current-OutputSource/Sink | 10mA, 25mA |
| ClockFrequency | 400 kHz |
| Voltage-Supply | 2.3V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 16-TSSOP (0.173, 4.40mm Width) |
Overview
Description
The PCA9538PWR is an I2C-bus controlled 8-bit I/O expander manufactured by Texas Instruments. It’s designed to provide additional input/output resources for microcontrollers through a serial interface, allowing efficient control and monitoring of up to eight ports. Each port can be configured as either an input or an output, offering flexibility to match various application needs.
Key features include a low standby current, open-drain interrupt output to alert changes to the host controller, and flexibility in voltage operation ranging from 2.3V to 5.5V, making it suitable for a variety of environments. The chip supports a fast I2C bus interface, with speeds up to 400 kHz, ensuring quick data transmission.
The PCA9538PWR is especially useful in applications like industrial control, where expanding I/O resources without redesigning existing architectures is beneficial. Packaged in a small TSSOP, it enables space-efficient designs. It’s ideal for tasks involving keypad control, LED indicators, or sensor data reading in embedded devices.
Key features include a low standby current, open-drain interrupt output to alert changes to the host controller, and flexibility in voltage operation ranging from 2.3V to 5.5V, making it suitable for a variety of environments. The chip supports a fast I2C bus interface, with speeds up to 400 kHz, ensuring quick data transmission.
The PCA9538PWR is especially useful in applications like industrial control, where expanding I/O resources without redesigning existing architectures is beneficial. Packaged in a small TSSOP, it enables space-efficient designs. It’s ideal for tasks involving keypad control, LED indicators, or sensor data reading in embedded devices.
Equivalent
The PCA9538PWR is an I2C-bus I/O expander with interrupt capability. Equivalent products include:
1. NXP PCA9538 - Similar functionality with I2C interface.
2. Microchip MCP23008 - 8-bit I2C I/O expander.
3. Texas Instruments PCF8574 - 8-bit I2C I/O expander.
4. ON Semiconductor CAT9554 - Features similar I2C I/O expansion.
Always verify the specifications and compatibility for your application.
1. NXP PCA9538 - Similar functionality with I2C interface.
2. Microchip MCP23008 - 8-bit I2C I/O expander.
3. Texas Instruments PCF8574 - 8-bit I2C I/O expander.
4. ON Semiconductor CAT9554 - Features similar I2C I/O expansion.
Always verify the specifications and compatibility for your application.
Features
The PCA9538PWR is an I²C-bus controlled 8-bit I/O expander with interrupt capability, designed to enhance microcontroller functionality by providing additional GPIO pins. Key features include:
1. I²C Interface: Supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) I²C communications, allowing seamless integration with a wide range of microcontrollers.
2. 8-Bit I/O Port: Offers 8 programmable GPIO pins that can be used as either inputs or outputs, with the flexibility to configure each pin individually.
3. Interrupt Output: Features an interrupt output pin that alerts the microcontroller to state changes on the input pins, enabling efficient response to external events.
4. Low Supply Voltage: Operates with a supply voltage ranging from 2.3V to 5.5V, making it suitable for battery-operated devices.
5. Low Standby Current: Consumes minimal power in standby mode, ideal for energy-sensitive applications.
6. Robust Design: Includes features like power-up reset, noise filtering on SCL/SDA inputs, and high ESD protection.
7. Package Options: Available in various packages, including TSSOP, facilitating versatile design requirements.
These features make the PCA9538PWR ideal for applications requiring expanded I/O capabilities and efficient control over peripheral devices.
1. I²C Interface: Supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) I²C communications, allowing seamless integration with a wide range of microcontrollers.
2. 8-Bit I/O Port: Offers 8 programmable GPIO pins that can be used as either inputs or outputs, with the flexibility to configure each pin individually.
3. Interrupt Output: Features an interrupt output pin that alerts the microcontroller to state changes on the input pins, enabling efficient response to external events.
4. Low Supply Voltage: Operates with a supply voltage ranging from 2.3V to 5.5V, making it suitable for battery-operated devices.
5. Low Standby Current: Consumes minimal power in standby mode, ideal for energy-sensitive applications.
6. Robust Design: Includes features like power-up reset, noise filtering on SCL/SDA inputs, and high ESD protection.
7. Package Options: Available in various packages, including TSSOP, facilitating versatile design requirements.
These features make the PCA9538PWR ideal for applications requiring expanded I/O capabilities and efficient control over peripheral devices.
Pinout
The PCA9538PWR is an I²C-bus controlled 8-bit I/O port with interrupt. It is typically used for expanding the number of I/O pins in microcontroller or microprocessor applications. This device is manufactured by Texas Instruments and comes in a 16-pin TSSOP package.
Here is a brief description of the pin functions:
1. VCC - Power supply
2. GND - Ground
3. SCL - I²C clock input
4. SDA - I²C data input/output
5. INT - Interrupt output (active low)
6. A0, A1, A2 - Address inputs to configure the I²C slave address
7. P0-P7 - General-purpose I/O pins
The PCA9538PWR allows the user to configure each I/O independently as an input or output, and to read or write to each pin through the I²C bus. It is commonly used in applications requiring additional GPIOs or in systems where board space is limited.
Here is a brief description of the pin functions:
1. VCC - Power supply
2. GND - Ground
3. SCL - I²C clock input
4. SDA - I²C data input/output
5. INT - Interrupt output (active low)
6. A0, A1, A2 - Address inputs to configure the I²C slave address
7. P0-P7 - General-purpose I/O pins
The PCA9538PWR allows the user to configure each I/O independently as an input or output, and to read or write to each pin through the I²C bus. It is commonly used in applications requiring additional GPIOs or in systems where board space is limited.
Manufacturer
The PCA9538PWR is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components and integrated circuits. It is known for its innovation in analog and embedded processing products. TI serves a vast array of markets, including industrial, automotive, personal electronics, communications equipment, and enterprise systems. The company focuses on developing technologies that enable the development of smarter, more efficient electronic devices.
Application
The PCA9538PWR is an I2C-bus I/O port expander offering additional GPIO pins for microcontrollers. Its application areas include:
1. Consumer Electronics: Used in smartphones, tablets, and TVs for managing additional input/output functions.
2. Industrial Automation: Provides extended GPIO in PLCs and control systems.
3. Networking Equipment: Utilized in switches and routers for controlling LEDs and status indicators.
4. Home Automation: Facilitates additional input/output for smart home devices.
5. Automotive Systems: Used in infotainment systems and body electronics for controlling peripheral devices.
6. Medical Devices: Extends control and monitoring capabilities in diagnostic equipment.
The device is favored for its low power consumption and ease of integration into existing I2C systems.
1. Consumer Electronics: Used in smartphones, tablets, and TVs for managing additional input/output functions.
2. Industrial Automation: Provides extended GPIO in PLCs and control systems.
3. Networking Equipment: Utilized in switches and routers for controlling LEDs and status indicators.
4. Home Automation: Facilitates additional input/output for smart home devices.
5. Automotive Systems: Used in infotainment systems and body electronics for controlling peripheral devices.
6. Medical Devices: Extends control and monitoring capabilities in diagnostic equipment.
The device is favored for its low power consumption and ease of integration into existing I2C systems.
Package
The PCA9538PWR is an I2C I/O expander manufactured by Texas Instruments. It comes in a TSSOP (Thin Shrink Small Outline Package) package type. Specifically, it uses a 16-pin TSSOP configuration.
