LTC4305CGN#TRPBF

Specialized Overview

The LTC4305CGN#TRPBF is a 2-channel, 2-wire bus multiplexer with capacitance buffering, manufactured by Analog Devices Inc. It provides capacitive isolation between an upstream bus and downstream buses, allowing software-controlled connection of the upstream bus to any combination of downstream channels. The device supports independent pull-up voltages ranging from 2.2V to 5.5V for each channel. Key electrical parameters include a supply voltage range (VCC) of 2.7V to 5.5V, an operating temperature range of 0°C to 70°C, and a maximum input supply current of 8mA at VCC = 5.5V. It features programmable timeout circuitry for stuck-low conditions and rise time accelerators. The component is housed in a 16-lead SSOP package.

Specialized Feature Summary

• Provides capacitive isolation between upstream and downstream 2-wire buses while maintaining signal integrity through bidirectional buffers.
• Supports nested addressing and level translation, enabling communication between buses operating at different voltage levels such as 5V and 3.3V.
• Includes programmable disconnect functionality that isolates downstream buses if a stuck-low condition is detected on the bus lines.

Specialized Applications

• Extending I2C or SMBus networks across backplanes with hot-swappable modules
• Connecting multiple downstream buses to a single upstream master controller
• Providing fault reporting and isolation in systems requiring live board insertion and removal

Specialized Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging for the lead-free version. Confirm the CGN suffix corresponds to the commercial temperature grade and SSOP package type. Ensure compatibility with the required bus voltage levels and address configuration before finalizing procurement orders.

Specialized Selection Notes

Select this component when capacitive isolation is required between I2C segments without active repeater logic overhead. Consider the 16-lead SSOP package constraints for PCB layout. Evaluate the need for nested addressing capabilities and the specific timeout requirements for stuck-bus protection compared to standard multiplexers.

Specialized Part Context

This part belongs to the LTC4305 series of 2-wire bus multiplexers. It shares functional similarities with other devices in the family but differs in package options and temperature grades. The CGN variant specifically denotes the narrow plastic SSOP package suitable for surface mount applications requiring moderate pin counts.

Specialized Replacement Considerations

Direct substitutes within the same package and temperature grade may be limited. Verify pinout compatibility and register definitions if considering alternative multiplexers. Check if the replacement supports the same capacitance buffering and ALERT protocol requirements.