PCA9601D,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9601D,118 is a dual bidirectional bus buffer designed to isolate I2C-bus capacitance for point-to-point or multipoint applications up to 4000 pF. It operates at speeds up to 1 MHz with Fast-mode Plus (Fm+) compatibility on the high-drive side. The device features temperature-stabilized logic levels at the SX/SY interface and supports supply voltages from 2.5 V to 15 V. It provides 15 mA sink capability at SX/SY over 0 °C to 85 °C, enabling driving of 5 V Fm+ buses with 470 pF loads. The component splits signals into unidirectional TX/RX pairs for galvanic isolation or balanced transmission lines.

Signal Buffers, Repeaters, Splitters Feature Summary

• Splits bidirectional I2C-bus signals into unidirectional TX/RX and TY/RY pairs for interfacing with opto-electrical isolators
• Provides 15 mA SX/SY sink capability to achieve 5 V Fm+ bus rise times with 470 pF loads
• Isolates capacitance allowing greater than 400 pF on the SX/SY side and 4000 pF on the TX/TY side
• Features temperature-stabilized logic voltage levels at the SX/SY interface independent of supply voltage

Signal Buffers, Repeaters, Splitters Applications

• Interface between I2C-buses operating at different logic levels such as 5 V and 3 V or 15 V
• Interface between I2C-bus and SMBus standard or Fm+ standard
• Conversion of I2C-bus SDA or SCL signals to multi-drop differential bus hardware via compatible devices
• Interfaces with opto-couplers to provide opto-isolation between I2C-bus nodes up to 1 MHz
• Long distance point-to-point or multipoint architectures

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering part number PCA9601D,118 corresponds to the SO8 package variant. Confirm the ambient temperature range is -40 °C to +85 °C. Ensure the packing method matches the REEL 13" Q1/T1 specification. Cross-reference the datasheet revision 3.1 dated 4 January 2022 for accurate electrical characteristics.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when higher drive capability is required compared to the PCA9600. Use it to interface normal I2C-bus systems with higher capacitance or different voltage configurations. Ensure the application requires separation of signals for galvanic isolation or long-distance transmission. Verify that the 15 mA sink current meets the load requirements for the target Fm+ bus speed.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9601 is a higher-speed version of the P82B96 and a higher drive version of the PCA9600. It allows many more Fast-mode Plus slaves on remote daughter cards. The device creates a non-latching, bidirectional, logic interface between a normal I2C-bus and other bus configurations. It is suitable for connecting buses with non-I2C-compliant logic levels like SMBus or PMBus.

Signal Buffers, Repeaters, Splitters Replacement Considerations

PCA9601DPZ is a drop-in alternate for PCA9601DP,118 using a Static Shielding Bag solution.