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PCA9555RGER from TI,Texas Instruments

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PCA9555RGER

Manufacturer: TI

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9555RGER TI 2613 In Stock

Description and Introduction

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85 # Introduction to the PCA9555RGER from Texas Instruments  

The PCA9555RGER is a versatile 16-bit I/O expander designed to simplify system integration by providing additional GPIO (General-Purpose Input/Output) ports via an I²C-bus interface. This low-power CMOS device is ideal for applications requiring expanded I/O capabilities without increasing microcontroller pin count.  

Featuring two 8-bit configuration registers, the PCA9555RGER allows each I/O pin to be individually configured as an input or output. Inputs include programmable pull-up resistors, while outputs support high-current drive for directly driving LEDs or other low-power peripherals. The device operates over a wide voltage range (2.3V to 5.5V), making it compatible with various logic levels.  

Key applications include industrial control systems, consumer electronics, and embedded designs where space and power efficiency are critical. The PCA9555RGER also includes interrupt functionality, reducing the need for continuous polling and improving system responsiveness.  

Housed in a compact 24-pin VQFN package, this I/O expander offers a reliable solution for expanding digital interfaces while maintaining minimal board footprint. Its robust design and ease of integration make it a preferred choice for engineers seeking efficient I/O expansion in constrained environments.

Application Scenarios & Design Considerations

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85

Alternative Part Number

  • TCA9555PWR --: Pin-compatible I2C 16-bit I/O expander from TI's TCA series with similar register map and interrupt output, often used as a direct substitute for PCA9555.
  • PCF8575TS --: Widely available I2C 16-bit I/O expander with the same function and similar pinout, a common alternative when PCA9555 is unavailable.
  • MAX7311AUG+ --: 16-bit I2C I/O port expander with interrupt and reset features, functionally comparable and usable as a cross-vendor alternative.

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