PCA9525D,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9525D,118 is a monolithic CMOS integrated circuit designed for bus buffering in I²C-bus, SMBus, DDC, and PMBus applications. It extends the bus load limit by buffering both SCL and SDA lines, allowing maximum permissible bus capacitance on both sides of the buffer. The device includes a unidirectional clock buffer and a bidirectional data buffer. Operating voltages range from 2.7 V to 5.5 V with a quiescent supply current of 1 μA at 5.5 V. It supports operation in excess of 1 MHz with fast switching times. The package is SO8 (SOT96-1), featuring an 8-lead plastic small outline package with a body width of 3.9 mm.

Signal Buffers, Repeaters, Splitters Feature Summary

• Simple impedance isolating buffer for 2-wire buses
• Enable function allows bus segments to be disconnected
• Hysteresis on inputs provides noise immunity

Signal Buffers, Repeaters, Splitters Applications

• Electronic signs and displays
• Game consoles/boxes
• TV/projector/monitor interconnection (DDC)

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when extending bus load limits or isolating bus sections is required. Ensure the application does not rely on clock stretching, as the unidirectional clock buffer does not support it. Verify that the operating voltage falls within the 2.7 V to 5.5 V range and that external pull-up resistors are provided for the open-drain ports.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9525D is part of the PCA9525 family of simple 2-wire bus buffers manufactured by NXP Semiconductors. The 'D' suffix indicates the SO8 package variant. This series is designed to facilitate the connection of multiple slave devices to master controllers while maintaining signal integrity across high-capacitance loads.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers: None available.