PCA9516PW,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9516PW,118 is a BiCMOS integrated circuit designed as a five-channel I2C hub repeater. It buffers both data (SDA) and clock (SCL) lines to extend bus capacitance limits up to 400 pF 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. Propagation delays are specified with maximum values of 170 ns for high-to-low transitions and 78 ns for low-to-high transitions. The component features open-drain inputs and outputs, active HIGH enable pins, and provides ESD protection exceeding 2000 V HBM. It is housed in a 16-pin TSSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Five bi-directional open-drain buffers expand I2C bus topology into multiple segments
• Lock-up free operation using distinct input and output low-level voltage thresholds
• Supports arbitration and clock stretching across the repeater without functional degradation
• Powered-off high impedance state isolates I2C pins when supply voltage is removed

Signal Buffers, Repeaters, Splitters Applications

• Expanding I2C systems by dividing buses into five independent segments
• Interfacing between different voltage domains such as 3.3 V and 5 V buses
• Isolating slower 100 kHz buses while allowing other segments to operate at 400 kHz

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires expanding an I2C bus beyond standard capacitance limits or connecting devices operating at different voltage levels. Ensure that the enable pins are managed correctly to prevent contention during state changes. Note that series connection of multiple PCA9516 units is not supported due to voltage level shifting characteristics.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9516 family of I2C hubs manufactured originally by Philips Semiconductors, now NXP. The PW suffix indicates the 16-lead Thin Shrink Small Outline Package (TSSOP). The 118 suffix denotes reel packaging. This device serves as a central hub repeater to isolate bus segments while maintaining signal integrity across the network.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitutes include PCA9516D,112 and PCA9516APW,112. Verify pin compatibility and electrical specifications before substitution.