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PCA9538DGVR from TI,Texas Instruments

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PCA9538DGVR

Manufacturer: TI

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TVSOP -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9538DGVR TI 2000 In Stock

Description and Introduction

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TVSOP -40 to 85 The **PCA9538DGVR** from Texas Instruments is a versatile, low-power **8-bit I/O expander** designed to enhance system flexibility in microcontroller-based applications. Utilizing the **I²C-bus/SMBus interface**, this component enables efficient communication with a host controller while minimizing pin usage.  

Featuring **8 programmable GPIO pins**, the PCA9538DGVR can be configured as inputs or outputs, supporting both push-pull and open-drain operations. Its **interrupt output** functionality allows immediate notification of input state changes, reducing the need for continuous polling. With an operating voltage range of **1.65V to 5.5V**, it is compatible with a wide variety of logic levels, making it suitable for mixed-voltage systems.  

The device includes **internal power-on reset** circuitry, ensuring reliable initialization, and offers **low standby current consumption**, making it ideal for power-sensitive designs. Available in a compact **TSSOP-16 package**, the PCA9538DGVR is well-suited for space-constrained applications such as industrial controls, consumer electronics, and embedded systems.  

Engineers benefit from its **hot-insertion protection** and **noise-filtered inputs**, enhancing robustness in electrically noisy environments. Whether expanding I/O capabilities or simplifying system design, the PCA9538DGVR provides a reliable and efficient solution for modern digital interfaces.

Application Scenarios & Design Considerations

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TVSOP -40 to 85

Alternative Part Number

  • TCA9538DBQR --: Pin-compatible I2C 8-bit I/O expander from TI's TCA series with similar register map and functionality, available in a smaller DBQ package.
  • PCF8574APWR --: Widely used I2C 8-bit I/O expander with similar function; requires minor firmware adjustment but is a common drop-in style alternative in TSSOP package.
  • MAX7311AUG+ --: I2C 16-bit I/O expander offering more ports and comparable I2C interface; suitable when extra I/O is acceptable and firmware can be adapted.

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