PCA9605DP,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9605DP,118 is a monolithic CMOS integrated circuit designed for bus buffering in I2C-bus, SMBus, DDC, and PMBus applications. It extends the permissible bus capacitance by buffering both SCL and SDA lines. The device features a unidirectional clock buffer with reversible direction control via the DIR pin, and a bidirectional data buffer that automatically manages signal flow based on voltage levels. Operating voltages range from 2.7 V to 5.5 V, with a maximum static open-drain pull-down capability of 30 mA. It supports Standard-mode, Fast-mode, and Fast-mode Plus (exceeding 1 MHz) speeds. The component is housed in an 8-lead TSSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Impedance isolating buffer for 2-wire buses
• Bidirectional data buffer with automatic direction control
• Unidirectional clock buffer with configurable direction
• Enable function for bus segment isolation

Signal Buffers, Repeaters, Splitters Applications

• Electronic signs and displays
• Lighting control systems
• Building automation networks
• Power management systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix '118' corresponds to the TSSOP8 package variant when sourcing. Confirm the manufacturer is NXP Semiconductors. Ensure the datasheet revision matches current design requirements. Check for RoHS compliance status as indicated in the official documentation. Validate the operating temperature range against environmental conditions.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when extending I2C bus load limits or isolating bus capacitance between master and slave sections. It is suitable for interfacing standard 3 mA I2C parts to higher drive requirements. Consider the DIR pin configuration if multiple masters are present on opposite sides of the buffer. Ensure external pull-up resistors are selected to match the required rise times and bus speed specifications.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9605 family of simple 2-wire bus buffers manufactured by NXP Semiconductors. The DP suffix specifically denotes the plastic thin shrink small outline package (TSSOP8) with an 8-lead body width of 3 mm. It serves as a solution for increasing the number of slave devices on a single bus while maintaining signal integrity across different bus segments.

Signal Buffers, Repeaters, Splitters Replacement Considerations

PCA9525D is a documented similar part within the same product family offering comparable buffering functions.