PCA9515AP

Signal Buffers, Repeaters, Splitters Overview

The PCA9515AP is a dual bidirectional I2C bus and SMBus repeater manufactured by Texas Instruments. It utilizes BiCMOS technology to buffer both data (SDA) and clock (SCL) lines, effectively extending the bus beyond the standard 400 pF capacitance limit. The device supports mixed-mode signal operation, allowing connection of buses with different voltage levels or speeds. Key electrical parameters include an operating supply voltage range of 3.0 V to 3.6 V, 5.5 V tolerant inputs for SCL, SDA, and the enable pin, and a clock frequency support from 0 Hz to 400 kHz. It operates within a temperature range of -40 °C to 85 °C and is housed in an 8-pin MSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Dual-channel bidirectional buffering for I2C and SMBus systems
• Supports mixed-mode signal operation between different voltage domains
• Lock-up-free operation accommodating arbitration and clock stretching

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus length and device count beyond capacitance limits
• Isolating high-speed (400 kHz) and low-speed (100 kHz) bus segments
• Connecting 5 V and 3.3 V bus sections within a single system

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix 'P' against official Texas Instruments documentation to confirm the exact package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if mandated by your project standards. Cross-reference the manufacturer date code and lot number with the distributor's certificate of analysis to guarantee authenticity and traceability before integration into production.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires isolating two halves of an I2C bus to manage excessive capacitance or to bridge different voltage levels. It is suitable for applications involving multiple masters where clock stretching must be supported across the repeater. Consider the 8-pin MSOP package constraints regarding PCB space and thermal dissipation during layout planning.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9515 series belongs to Texas Instruments' portfolio of interface ICs designed for I2C and SMBus compatibility. This specific part functions as a repeater rather than a switch, distinguishing it from devices like the PCA9544A which offer channel selection. It is part of a broader family including variants with different packaging options such as SOIC and TSSOP, all serving similar buffering roles in embedded systems.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Direct replacements include the PCA9515ADGKRG4 and PCA9515ADR, which share identical functional specifications but may differ in package style or reel configuration. Verify that any substitute maintains the same 3.0 V to 3.6 V supply voltage range and 5.5 V input tolerance to ensure circuit compatibility.