PCA9516APW,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9516APW,112 is a CMOS integrated circuit designed for I2C-bus and SMBus systems. It functions as a five-channel bidirectional hub repeater that buffers both data (SDAn) and clock (SCLn) lines to extend the bus beyond standard capacitance limits. The device supports operating supply voltages from 2.3 V to 3.6 V and provides 5.5 V tolerance on I2C-bus and enable pins. It accommodates Standard-mode and Fast-mode devices with a maximum clock frequency of 400 kHz. The component operates within an ambient temperature range of -40 °C to +85 °C and is housed in a TSSOP16 package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Five-channel bidirectional buffering capability for I2C-bus and SMBus expansion
• Lock-up free operation utilizing specific voltage level offsets between input and output stages
• Supports arbitration and clock stretching across the repeater without functional degradation
• Powered-off high-impedance state prevents interference when the device is not active

Signal Buffers, Repeaters, Splitters Applications

• Expanding I2C-bus systems by dividing the bus into five segments with independent enable control
• Interfacing buses operating at different voltage levels, such as 3.3 V and 5 V
• Isolating slower 100 kHz bus segments while allowing other segments to operate at 400 kHz

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix matches the required packaging configuration. Confirm the package type corresponds to the design requirements, as the base part number may be available in alternative packages like SO16. Ensure the temperature range aligns with the system's operational environment specifications before finalizing procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires expanding an I2C-bus beyond the 400 pF capacitance limit using a single repeater delay per segment. It is suitable for applications requiring isolation between different voltage domains or clock speeds. Note that multiple PCA9516A units cannot be connected in series due to lock-up prevention mechanisms.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the PCA9516A family of 5-channel I2C-bus hubs manufactured by NXP Semiconductors. The 'PW' designation indicates the TSSOP16 plastic thin shrink small outline package variant. The ',112' suffix specifies the particular ordering option associated with this package style and temperature range.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9516AD serves as a pin-compatible replacement offering the same functionality in an SO16 package. Other expandable hubs like the PCA9518A provide similar multi-channel capabilities but differ in package size and electrical characteristics.