PCA9516D,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9516D,118 is a BiCMOS integrated circuit designed as a five-channel I2C hub repeater for expanding I2C and SMBus systems. It buffers both data (SDA) and clock (SCL) lines to support up to five buses with a 400 pF capacitance limit per segment. 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 active HIGH enable inputs, open-drain I/Os, and 5.5 V tolerant pins. Propagation delays are specified at a maximum of 170 ns for high-to-low transitions and 78 ns for low-to-high transitions.

Signal Buffers, Repeaters, Splitters Feature Summary

• Five bidirectional open-drain buffers expand bus topology without functional degradation
• Lock-up free operation using distinct input and output low-level voltage thresholds
• Supports arbitration and clock stretching across the repeater segments
• Powered-off high impedance state prevents bus interference during power loss

Signal Buffers, Repeaters, Splitters Applications

• Expanding I2C bus capacitance limits in multi-device systems
• Interfacing between 3.3 V and 5 V I2C bus domains
• Isolating 100 kHz buses while allowing other segments to operate at 400 kHz

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering code suffix matches the required package type. The 'D' designation indicates the SOIC-16 package variant. Confirm temperature range specifications align with system requirements before procurement. Ensure compatibility with existing I2C controller configurations.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires dividing a single I2C bus into multiple segments to manage total capacitance. It is suitable for applications needing isolation between different voltage levels or clock speeds. Do not use if series cascading of multiple hubs is required, as the design does not support this configuration.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9516 family of I2C hubs manufactured by Philips Semiconductors (now NXP). It serves as a signal buffer and repeater to overcome the standard 400 pF capacitance limitation of I2C buses. The D suffix specifically identifies the plastic small outline package version.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9516APW is a TSSOP-16 equivalent offering identical electrical functionality. Other variants include PCA9516PW for TSSOP packaging. Verify pinout compatibility and package dimensions when substituting.