LTC4303CDD#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4303CDD#TRPBF is a hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It supports I²C, I²C Fast-Mode, and SMBus standards with operation up to 400 kHz. The device operates on a supply voltage (VCC) ranging from 2.7 V to 5.5 V, drawing a typical supply current of 8 mA at 5.5 V. It features automatic disconnect when the bus is stuck low for 30 ms or more, followed by automatic clocking to recover the bus. The component includes rise-time accelerators allowing larger pull-up resistors and precharges SDA/SCL lines to 1 V during insertion. It is housed in an 8-lead DFN package measuring 3 mm × 3 mm.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for SDA and SCL lines while isolating backplane and card capacitances.
• Automatically detects stuck buses and generates clock pulses to free the connection.
• Prevents data corruption during live board insertion through input line precharging.
• Includes ENABLE pin for gating connection and READY output for status indication.

Signal Buffers, Repeaters, Splitters Applications

• Hot swap I/O card insertion into live backplanes
• Capacitance buffering and bus extension in server systems
• RAID system interconnects

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 that the C grade designation aligns with the commercial temperature range specifications for the target deployment environment.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when isolation between backplane and card capacitance is critical for signal integrity. Ensure the system utilizes staggered connectors or appropriate RC filtering on the ENABLE pin to manage transients during live insertion events effectively.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4303 family of 2-wire bus buffers. It is pin-compatible with the LTC4300A-1 variant. The DFN package offers a compact footprint suitable for dense PCB layouts compared to larger surface mount options.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4300A-1 is a pin-compatible alternative within the same product family offering similar buffering functions.