PCA9515D,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9515D,112 is a BiCMOS integrated circuit designed as an I2C-bus and SMBus repeater. It extends bus capacity by buffering both data (SDA) and clock (SCL) lines, allowing two buses of 400 pF capacitance each. The device operates within a supply voltage range of 3.0 V to 3.6 V and supports clock frequencies from 0 Hz to 400 kHz. It features open-drain inputs/outputs, lock-up free operation, and 5.5 V tolerant pins. The component is housed in an SO8 plastic small outline package with dimensions of 3.9 mm body width.

Signal Buffers, Repeaters, Splitters Feature Summary

• Two-channel bidirectional buffer for I2C and SMBus systems
• Active HIGH enable input with internal pull-up
• Lock-up free operation using specific low voltage levels
• Supports arbitration and clock stretching across the repeater

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus length beyond standard capacitance limits
• Isolating different voltage domains such as 3.3 V and 5 V buses
• Connecting multiple masters on separate bus segments

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the exact ordering suffix matches the required package type and temperature range. Confirm RoHS compliance status through official manufacturer channels. Ensure the source document corresponds to the specific revision date. Check for any recent product discontinuation notices or lifecycle changes before finalizing procurement plans.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires isolating bus capacitance or bridging different voltage levels. Ensure the operating environment stays within the specified -40 °C to +85 °C temperature range. Verify that the total bus capacitance does not exceed 400 pF per segment. Consider the PCA9515A variant if a wider voltage range starting at 2.3 V is necessary.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9515 family of I2C repeaters manufactured by NXP Semiconductors. It serves as a signal buffer to overcome the 400 pF capacitance limit inherent in standard I2C protocols. The D suffix indicates the SO8 package variant, distinct from the DP TSSOP8 version. It enables designers to expand network topology without degrading signal integrity.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9515A offers a wider supply voltage range of 2.3 V to 3.6 V but shares similar functionality. Other variants include the PCA9516A and PCA9518A, though they cannot be used in series with the PCA9515 due to different logic level handling mechanisms.