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PCA9518DBRG4 from BB/TI

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PCA9518DBRG4

Manufacturer: BB/TI, TI/BB

EXPANDABLE FIVE-CHANNEL I2C HUB

Partnumber Manufacturer Quantity Availability
PCA9518DBRG4 BB/TI, TI/BB 48 In Stock

Description and Introduction

EXPANDABLE FIVE-CHANNEL I2C HUB The **PCA9518DBRG4** from Texas Instruments is a high-performance, dual bidirectional I²C bus buffer designed to extend the range and reliability of I²C and SMBus systems. This component is particularly useful in applications where signal integrity must be maintained over long distances or across multiple devices.  

Featuring a voltage-level translation capability, the PCA9518DBRG4 supports communication between I²C buses operating at different voltages, ranging from 0.9V to 5.5V. Its dual-channel architecture allows for independent buffering of two I²C buses, reducing signal distortion and improving noise immunity.  

The device incorporates a built-in rise-time accelerator, which helps maintain fast data rates while minimizing signal degradation. With low standby current consumption, it is well-suited for power-sensitive applications. Additionally, the PCA9518DBRG4 is compatible with standard I²C protocols, ensuring seamless integration into existing designs.  

Housed in a compact **SSOP-20** package, this buffer is ideal for space-constrained applications such as industrial automation, consumer electronics, and telecommunications. Its robust design ensures reliable operation in noisy environments, making it a dependable choice for enhancing I²C bus performance.  

By addressing common challenges like capacitance loading and voltage mismatches, the PCA9518DBRG4 simplifies system design while improving overall communication efficiency.

Application Scenarios & Design Considerations

EXPANDABLE FIVE-CHANNEL I2C HUB

Alternative Part Number

  • TCA9518DGVR --: Same-function 8-channel I2C/SMBus hub with similar voltage range and pinout, from TI's TCA series, a direct functional replacement.
  • PCA9518PW --: Original NXP PCA9518 in TSSOP package; electrically equivalent to the TI variant, suitable when package compatibility is acceptable.
  • PCA9548APW --: 8-channel I2C switch with similar bus-expansion function and voltage range; a common alternative when a hub/switch function is needed, though register behavior differs slightly.
  • LTC4316CMS#PBF --: I2C bus buffer/address translator that can replace the hub function in many systems, offering robust level shifting and hot-swap support.

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