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PCA9557DGVRG4G4 from TI,Texas Instruments

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PCA9557DGVRG4G4

Manufacturer: TI, TI/BB

REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS

Partnumber Manufacturer Quantity Availability
PCA9557DGVRG4G4 TI, TI/BB 299 In Stock

Description and Introduction

REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS The **PCA9557DGVRG4** from Texas Instruments is a versatile **8-bit I/O expander** designed to enhance system flexibility by providing additional input/output ports for microcontrollers and other digital devices. Utilizing the **I²C-bus interface**, this component enables efficient communication with minimal wiring, making it ideal for space-constrained applications.  

Featuring **low standby current consumption**, the PCA9557DGVRG4 is well-suited for power-sensitive designs. It supports both **input and output configurations**, with programmable polarity inversion for input ports, simplifying signal conditioning. The device also includes **internal pull-up resistors**, reducing external component count and simplifying PCB layout.  

With a **wide operating voltage range (2.3V to 5.5V)**, the PCA9557DGVRG4 is compatible with various logic levels, ensuring seamless integration into mixed-voltage systems. Its **small TSSOP-16 package** makes it an excellent choice for compact designs, while robust ESD protection enhances reliability in industrial and consumer applications.  

Common uses include **sensor interfacing, LED control, and keypad scanning**, where additional I/O expansion is required without increasing microcontroller pin count. The PCA9557DGVRG4 combines performance, efficiency, and ease of use, making it a reliable solution for modern embedded systems.

Application Scenarios & Design Considerations

REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS

Alternative Part Number

  • PCA9557PW --: Same I2C 8-bit I/O expander function from TI in a TSSOP package, electrically compatible with the original device.
  • TCA9557DGVR --: TI's TCA9557 is a pin-compatible I2C I/O expander with similar register set and voltage range, suitable as a direct functional replacement.
  • PCF8574T --: Widely available I2C 8-bit I/O expander with comparable functionality and interface, usable as an alternative with minor firmware adaptation.
  • TCA9557DGVR --: Pin-compatible I2C 8-bit I/O expander from a different TI series with similar functionality and package.
  • PCF8574APWR --: Widely available I2C 8-bit I/O expander in TSSOP, functionally similar though register map differs.
  • MAX7311AUG+ --: I2C 16-bit I/O expander offering similar I/O expansion capability as a cross-vendor alternative.

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