LTC4301IMS8#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The Analog Devices LTC4301IMS8#TRPBF is a supply-independent, hot swappable 2-wire bus buffer designed for I/O card insertion into live backplanes. It supports bidirectional buffering for SDA and SCL lines, allowing pull-up voltages above or below VCC. The device operates within a supply voltage range of 2.7V to 5.5V and supports I2C Fast Mode and SMBus standards up to 600kHz. Key electrical parameters include a typical supply current of 4.5mA at 5.5V, a precharge voltage of 1V on SDA/SCL lines, and an input capacitance of 10pF. It features 10kV Human Body Model ESD protection and isolates input/output lines to prevent data corruption during live board insertion.

Signal Buffers, Repeaters, Splitters Feature Summary

• Prevents SDA and SCL line corruption during live board insertion and removal from backplanes by isolating input and output sides until a stop bit or bus idle condition is detected.
• Allows independent pull-up voltages for the backplane and card sides, enabling operation with supply levels above or below the device's VCC pin.
• Provides 1V precharge on all SDA and SCL lines during insertion to minimize bus disturbances and voltage differentials upon connection.
• Supports clock stretching, arbitration, synchronization, and acknowledge protocols while maintaining high impedance pins when VCC is 0V.

Signal Buffers, Repeaters, Splitters Applications

• Hot swap applications involving I/O card insertion into live backplanes
• Servers and desktop computer systems requiring safe bus expansion
• CompactPCI and ATCA systems utilizing staggered connectors
• Capacitance buffering and bus extending in distributed 2-wire networks

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free compliance. Confirm the IMS8 designation corresponds to the MSOP-8 package and the 'I' grade indicates the -40°C to +85°C operating temperature range. Ensure the source documentation matches the manufacturer's official datasheet for the LTC4301 family to validate pinout and electrical specifications.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems that require hot swapping of I/O cards without disrupting active bus transactions. It is suitable for environments where backplane and card supply voltages differ or are undefined relative to each other. Consider the 600kHz maximum frequency limit and the need for external pull-up resistors if higher speed or specific drive strengths are required beyond standard I2C/SMBus configurations.

Signal Buffers, Repeaters, Splitters Part Context

The LTC4301 belongs to a family of hot swappable bus buffers manufactured by Analog Devices (formerly Linear Technology). It complements parts like the LTC4300A series and LTC4301L by providing specific isolation and level translation capabilities. The IMS8 variant specifically denotes the plastic MSOP package form factor, distinguishing it from DFN options or other temperature grades within the same functional family.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers include the LTC4300A-1IMS8#TRPBF for similar hot swap buffering functions. The LTC4301LIMS8#TRPBF offers low voltage level translation capabilities as an alternative within the same package style.