LTC4309IGN#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4309IGN#TRPBF is a hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. in a 16-lead SSOP package, rated for an operating temperature range of –40°C to 85°C. It provides bidirectional buffering for I2C and SMBus interfaces while isolating input and output capacitances. The device features a typical 60mV offset voltage independent of load, optional disconnect functionality when the bus is stuck low, and level shifting capabilities for 2.5V, 3.3V, and 5V busses. It includes 1V precharge on all SDA and SCL lines to minimize disturbances during live board insertion.

Signal Buffers, Repeaters, Splitters Feature Summary

• Prevents data and clock corruption during live board insertion and removal from backplanes
• Provides high impedance SDA and SCL pins when VCC is zero
• Features ±6kV human body model ESD ruggedness
• Includes open drain READY and FAULT status outputs

Signal Buffers, Repeaters, Splitters Applications

• Servers
• RAID Systems
• ATCA
• Capacitance Buffer/Bus Extender

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the component is sourced directly from authorized distributors or the manufacturer to ensure authenticity. Check for lead-free finish compliance and verify the part marking against official documentation before procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for applications requiring isolation between backplane and card capacitances. Ensure the system supports the required supply voltages and utilizes the staggered connector approach if live insertion is critical. Verify that pull-up resistor values are calculated correctly to activate the rise time accelerators effectively.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4309 family of hot swappable bus buffers designed for 2-wire communication systems. It is specifically engineered to handle the electrical challenges associated with inserting I/O cards into live backplanes without disrupting ongoing data transactions.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Consult Analog Devices marketing for parts specified with wider operating temperature ranges. Other members of the LTC4300 bus buffer family may offer similar functionalities but require verification of pin compatibility and electrical specifications.