LTC4301CDD#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4301CDD#TRPBF is a supply-independent, hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It facilitates I/O card insertion into live backplanes without data corruption. The device supports bidirectional buffering for SDA and SCL lines, allowing independent pull-up voltages on input and output sides. It operates within a VCC range of 2.7V to 5.5V with a typical supply current of 4.5mA at 5.5V. The component supports I2C Fast Mode and SMBus standards up to 600kHz operation. It features 10kV Human Body Model ESD protection and includes a 1V precharge function on all SDA and SCL lines during insertion. The part is housed in an 8-lead DFN (3mm × 3mm) package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering isolates backplane and card capacitances while supporting clock stretching, arbitration, and synchronization.
• Prevents SDA and SCL line corruption during live board insertion and removal through controlled connection sequencing.
• Allows bus pull-up voltages on the input side to be independent from and higher or lower than the output side VCC.

Signal Buffers, Repeaters, Splitters Applications

• Hot board insertion in CompactPCI and ATCA systems
• Servers requiring live backplane connectivity
• Desktop computers with modular expansion slots
• Capacitance buffering and bus extension applications

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #TRPBF confirms the tape and reel packaging format required for automated assembly processes. Confirm the C grade designation aligns with the commercial temperature range specifications of 0°C to 70°C. Ensure the DFN package dimensions match the PCB footprint requirements for the target design implementation.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when isolation between backplane and card capacitances is necessary to maintain signal integrity during live insertion. Verify that the system voltage levels fall within the 2.7V to 5.5V operating range. Consider the 1V precharge feature if minimizing voltage differentials upon connector contact is critical for system reliability.

Signal Buffers, Repeaters, Splitters Part Context

This device belongs to the LTC4301 series of hot swappable bus buffers. It is distinct from addressable variants like the LTC4302 and low-voltage translation versions like the LTC4301L. The DFN package variant offers a compact form factor suitable for space-constrained edge-of-card designs.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4300A-1/LTC4300A-2 provides similar hot swap buffering capabilities. For applications requiring software-controlled addressing, the LTC4302 series serves as an alternative. Low-voltage level translation requirements may necessitate the LTC4301L variant.