LTC4301LCDD#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4301LCDD#PBF is a hot swappable, supply-independent 2-wire bus buffer manufactured by Analog Devices Inc. It operates within a voltage range of 2.7V to 5.5V and supports I2C, I2C Fast Mode, and SMBus standards up to 600kHz. The device translates signals as low as 1V to standard logic rails while isolating input and output capacitances. It features 10kV Human Body Model ESD protection and includes a control circuitry that prevents bus corruption during live board insertion. The component is housed in an 8-lead DFN (3mm × 3mm) package and functions within a commercial temperature range of 0°C to 70°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering for SDA and SCL lines with independent hot swap capabilities
• Level translation allowing pull-up voltages as low as 1V on the input side
• Prevents data and clock bus corruption during live backplane insertion and removal
• Supports clock stretching, arbitration, and synchronization protocols

Signal Buffers, Repeaters, Splitters Applications

• Hot board insertion into active backplanes
• Servers requiring safe I/O card integration
• Capacitance buffering and bus extension
• Desktop computers with modular expansion slots

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging when sourcing this component. Confirm the LC designation corresponds to the commercial temperature range requirements for your target application environment. Ensure the DFN package footprint matches your PCB layout constraints before finalizing procurement orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select the LTC4301LCDD#PBF when designing systems that require supply-independent level translation between varying bus voltages. This part is suitable for applications needing isolation between backplane and card capacitances to maintain signal integrity. Consider the 8-pin DFN package dimensions if space-constrained layouts are required for the interface circuitry.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4301 series of hot swappable bus buffers. It shares functional similarities with the LTC4300A but offers supply-independent operation. The DD suffix specifically denotes the 8-lead plastic DFN package format, distinguishing it from MSOP variants or tape-and-reel options within the same product family.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4301CDD#PBF

Signal Buffers, Repeaters, Splitters FAQ

How does the LTC4301L handle voltage differences between the input and output sides?

The device provides bidirectional buffering that keeps backplane and card capacitances isolated. It regulates the output voltage slightly higher than the input voltage based on the pull-up resistance and VCC, ensuring proper logic levels across different supply rails.

What is the function of the CS pin during normal operation?

For normal operation, the CS pin should be grounded. Driving CS above the 1.4V threshold isolates the input from the output and asserts the READY pin low, effectively disconnecting the backplane from the card until CS is pulled low again.

Does the LTC4301L support clock stretching and arbitration?

Yes, the device supports clock stretching, arbitration, and synchronization. The connection circuitry ensures that these protocols work correctly regardless of how devices on either side of the buffer are tied to the SDA and SCL lines.