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PCA9535RHLR from TI,Texas Instruments

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PCA9535RHLR

Manufacturer: TI, TI/BB

REMOTE 16-BIT I2C AND SMBus, LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

Partnumber Manufacturer Quantity Availability
PCA9535RHLR TI, TI/BB 946 In Stock

Description and Introduction

REMOTE 16-BIT I2C AND SMBus, LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS The **PCA9535RHLR** from Texas Instruments is a versatile 16-bit I/O expander designed to enhance the input/output capabilities of microcontrollers and other digital systems. Utilizing the I²C-bus interface, this component allows for easy expansion with minimal wiring, making it ideal for space-constrained applications.  

Featuring low standby current consumption, the PCA9535RHLR operates efficiently in power-sensitive designs. It supports both 3.3V and 5V logic levels, ensuring compatibility with a wide range of host controllers. Each of its 16 I/O pins can be independently configured as inputs or outputs, providing flexibility in system design.  

The device includes interrupt functionality, enabling efficient event-driven communication by alerting the host controller when input states change. Additionally, internal pull-up resistors simplify circuit design by reducing external component requirements.  

Housed in a compact **RHL (VQFN-24)** package, the PCA9535RHLR is well-suited for applications such as industrial control, consumer electronics, and embedded systems where I/O expansion is critical. Its robust performance, combined with Texas Instruments' reliability, makes it a preferred choice for engineers seeking a dependable I²C-based I/O solution.  

With its balance of functionality and efficiency, the PCA9535RHLR is an excellent option for expanding digital interfaces while maintaining system simplicity.

Application Scenarios & Design Considerations

REMOTE 16-BIT I2C AND SMBus, LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

Alternative Part Number

  • TCA9535PWR --: Same 16-bit I2C/SMBus I/O expander function with interrupt output, pin-compatible in TSSOP package and widely used as a direct PCA9535 substitute.
  • PCF8575TS --: 16-bit I2C I/O expander with similar register architecture and interrupt capability, a common cross-vendor alternative for PCA9535 designs.
  • MAX7311AUG+ --: 16-bit I2C port expander with interrupt and reset features, suitable functional replacement when PCA9535RHLR is unavailable.
  • TCA9535RTWR --: Pin-compatible 16-bit I2C I/O expander from TI's TCA series with similar electrical characteristics and the same register map, making it a near drop-in replacement.
  • PCA9555PW --: Widely used 16-bit I2C I/O expander with compatible functionality and register structure; requires checking package and voltage tolerances but is a proven alternative.
  • MAX7311AUG+ --: 16-bit I2C port expander offering similar I/O expansion capability; pinout and register layout differ, so firmware adaptation is needed, but it is a solid functional substitute.

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