LTC4301CDD#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4301CDD#PBF is a supply-independent, hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It supports I²C, I²C Fast Mode, and SMBus standards with operation up to 600 kHz. The device operates on a VCC supply ranging from 2.7 V to 5.5 V and draws a typical supply current of 4.5 mA at 5.5 V. It features bidirectional buffering for SDA and SCL lines, allowing input and output pull-up voltages to be independent. Key electrical parameters include a propagation delay of 10 ns, an input capacitance of 10 pF, and 10 kV Human Body Model ESD protection. The component is housed in an 8-lead DFN (3mm × 3mm) package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Allows bus pull-up voltages above or below the VCC supply voltage
• Prevents data and clock bus corruption during live board insertion and removal
• Isolates input and output SDA and SCL lines to increase fanout
• Provides 1V precharge on all SDA and SCL lines to minimize disturbances

Signal Buffers, Repeaters, Splitters Applications

• Hot board insertion into live backplanes
• Servers and desktop computers
• CompactPCI and ATCA systems
• Capacitance buffering and bus extending

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF confirms lead-free status as per manufacturer documentation. Confirm the DD package designation matches the required 8-lead DFN form factor. Ensure the C grade temperature range aligns with the operational environment requirements. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when independent pull-up voltages are required between the backplane and the card. Verify that the system operates within the 2.7 V to 5.5 V VCC range. Consider the 10 kV ESD rating for high-reliability environments. Evaluate the 10 ns propagation delay against system timing constraints. Ensure the DFN package fits the available PCB footprint.

Signal Buffers, Repeaters, Splitters Part Context

The LTC4301 belongs to the Linear Technology hot swappable buffer family. It complements parts like the LTC4300 series by offering supply independence without addressability. The CDD variant specifically denotes the commercial temperature range and DFN packaging. This part addresses the need for safe insertion of I/O cards into active systems.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4301L offers similar functionality but supports lower voltage level translation. Check if the LTC4300 series meets requirements if addressability is not needed. Verify package compatibility when substituting with other DFN-8 components.