PCA9515AD

Signal Buffers, Repeaters, Splitters Overview

The PCA9515AD is a CMOS integrated circuit designed for I2C-bus and SMBus systems. It functions as a bidirectional buffer that extends bus capacity by isolating two halves of the network, allowing each segment to support up to 400 pF of capacitance. This architecture accommodates more devices or longer cable lengths than standard limits permit. The device supports Standard-mode and Fast-mode operations with multiple masters, handles arbitration and clock stretching, and features powered-off high-impedance pins. It operates within a supply voltage range of 2.3 V to 3.6 V and includes 5.5 V tolerant inputs.

Signal Buffers, Repeaters, Splitters Feature Summary

• Extends I2C/SMBus networks by buffering SDA and SCL lines to isolate bus segments
• Supports multi-master environments with arbitration and clock stretching capabilities
• Provides lock-up free operation and powered-off high-impedance pin states

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus length beyond standard capacitance limits
• Connecting buses operating at different speeds (e.g., 100 kHz and 400 kHz)
• Interfacing between different voltage domains such as 5 V and 3.3 V systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments also produces a component with the identical part number PCA9515ADR. Confirm the specific datasheet revision and package type (SOIC-8) matches your design requirements before procurement to ensure functional compatibility.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires increasing the number of nodes or total bus capacitance beyond the 400 pF limit. It is suitable for applications needing isolation between distinct voltage levels or speed modes while maintaining full I2C protocol compliance and multi-master support.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the PCA9515A family of I2C bus repeaters manufactured by NXP Semiconductors. Variants include the PCA9515ADP in TSSOP packaging and other suffixes indicating different reel quantities or package styles. The family is designed specifically for enhancing I2C and SMBus network scalability.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9515ADP serves as a direct replacement for the PCA9515AD in TSSOP packages. Other compatible variants within the same functional family include PCA9515ADR and PCA9515ADT.