PCA9516D,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9516D,112 is a BiCMOS integrated circuit designed for I2C and SMBus systems. It functions as a five-channel hub repeater that buffers both data (SDA) and clock (SCL) lines, enabling the expansion of bus capacitance to five segments of 400 pF each. The device supports standard mode and fast mode I2C devices with a clock frequency range of 0 to 400 kHz. It operates within a supply voltage range of 3.0 V to 3.6 V and features 5.5 V tolerant I2C and enable pins. The component is housed in a 16-pin plastic SO package (SOT109-1) and operates across an ambient temperature range of -40 °C to +85 °C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Five bi-directional open-drain buffers allow segmentation of I2C buses into distinct hubs without functional degradation.
• Lock-up free operation utilizes slightly different legal low voltage levels to prevent input-output lock-up conditions between repeaters.
• Active HIGH individual enable inputs control associated SDA and SCL ports, supporting distributed enable configurations via wire-ORing.
• Powered-off high impedance I2C pins ensure isolation when the device is not powered.

Signal Buffers, Repeaters, Splitters Applications

• Expanding I2C bus systems by dividing them into multiple segments with increased capacitance limits.
• Interfacing buses operating at different voltage levels, such as 3.3 V and 5 V, without additional translation circuitry.
• Isolating slower 100 kHz buses from faster 400 kHz buses to maintain performance on the high-speed segment.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix

Signal Buffers, Repeaters, Splitters Selection Notes

Select this part for applications requiring up to five isolated I2C segments from a single hub. Ensure the system design accommodates the propagation delays introduced by the repeater, which may reduce the maximum effective operating frequency below 400 kHz. Confirm that unused ports are properly isolated by grounding their enable pins or pulling SDA/SCL lines to VCC to prevent unintended bus activity.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9516D,112 belongs to the PCA9516 family of 5-channel I2C hubs manufactured by NXP USA Inc. (formerly Philips Semiconductors). This family includes variants with different packaging options, such as the TSSOP16 version designated as PCA9516PW. The D suffix specifically denotes the 16-pin plastic small outline package (SO), while the ,112 indicates the standard packing quantity configuration.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers: PCA9516PW,112