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PCA9555PWRG4 from TI/BB,Texas Instruments

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PCA9555PWRG4

Manufacturer: TI/BB

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

Partnumber Manufacturer Quantity Availability
PCA9555PWRG4 TI/BB 18 In Stock

Description and Introduction

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-TSSOP -40 to 85 The **PCA9555PWRG4** from Texas Instruments is a versatile 16-bit I²C-bus and SMBus I/O expander designed to enhance system flexibility and simplify microcontroller interfacing. This low-power CMOS device provides general-purpose remote I/O expansion for most microcontroller families via the I²C-bus interface, making it ideal for applications requiring additional input/output ports.  

Featuring 16 quasi-bidirectional I/O pins, the PCA9555PWRG4 allows each pin to be independently configured as an input or output. The device includes internal pull-up resistors, reducing the need for external components. Its interrupt output pin signals changes on input ports, enabling efficient event-driven designs.  

Operating across a wide voltage range (2.3V to 5.5V), the PCA9555PWRG4 is suitable for mixed-voltage systems. With a standby current consumption of just 1 µA, it is optimized for power-sensitive applications. The device supports fast-mode I²C-bus communication (up to 400 kHz), ensuring responsive performance in embedded systems.  

Common applications include industrial controls, consumer electronics, and automation systems where additional I/O expansion is required. Its compact TSSOP-24 package makes it suitable for space-constrained designs. The PCA9555PWRG4 combines reliability, ease of integration, and low power consumption, making it a practical choice for modern electronic systems.

Application Scenarios & Design Considerations

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

Alternative Part Number

  • TCA9555PWR --: Pin-compatible I2C 16-bit I/O expander from TI with the same TSSOP-24 package and register map, offering a drop-in functional replacement.
  • PCF8575CTS/1,118 --: Widely used 16-bit I2C I/O expander with similar functionality and package options; requires minor software adjustment but is a proven alternative.
  • MAX7311AUG+ --: 16-bit I2C port expander with interrupt output and comparable feature set, suitable when TI/NXP parts are unavailable.

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