PCA9601DP,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9601DP,118 is a dual bidirectional bus buffer manufactured by NXP Semiconductors in an 8-lead TSSOP package. It isolates I2C-bus capacitance to support long buses with up to 4000 pF loading on the TX/TY side and over 400 pF on the SX/SY side. The device operates within a supply voltage range of 2.5 V to 15 V and supports data transfer speeds up to at least 1 MHz. It features a 15 mA sink capability on the SX/SY interface, enabling operation with Fast-mode Plus (Fm+) buses having 470 pF loads. The logic levels at the SX/SY interface are temperature-stabilized and independent of the supply voltage.

Signal Buffers, Repeaters, Splitters Feature Summary

• Splits I2C-bus signals into unidirectional TX/RX and TY/RY pairs for galvanic isolation or balanced transmission line interfacing
• Provides high drive capability on the buffered bus side to support extended cable lengths and higher capacitance loads
• Maintains stable logic voltage thresholds at the I2C-bus interface regardless of the main supply voltage variations

Signal Buffers, Repeaters, Splitters Applications

• Interface between I2C-buses operating at different logic levels such as 5 V and 3 V
• Long distance point-to-point or multipoint I2C architectures using twisted pair cables
• Galvanic isolation of I2C-bus nodes via opto-couplers to reach distances up to 1 MHz

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix to confirm the packaging method. The PCA9601DP,118 variant utilizes a standard reel packing method. Confirm that the required ambient temperature range aligns with the -40 °C to +85 °C specification. Ensure the design accommodates the static shielding bag requirements if applicable to other variants in the same family.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when the application requires buffering I2C signals across significant cable lengths or high capacitance loads exceeding standard bus limits. It serves as a direct upgrade to the P82B96, offering improved drive strength for Fast-mode Plus devices. Verify that the system does not require interconnecting multiple SX pins, as this configuration is unsupported by the internal logic design.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9601 series of dual bidirectional bus buffers. It functions as a higher-speed and higher-drive version of the PCA9600. The device is designed to isolate I2C-bus capacitance, allowing for the connection of remote daughter cards or long communication lines while maintaining signal integrity across varying voltage domains.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9601DPZ is documented as a drop-in alternate for the PCA9601DP,118. This alternative utilizes a Static Shielding Bag (SSB) solution. Verify that the packaging difference does not impact the assembly process or storage requirements.