LTC4305IGN#PBF

Specialized Overview

The LTC4305IGN#PBF is a 2-channel, 2-wire bus multiplexer with bus buffers providing capacitive isolation between upstream and downstream buses. It operates within a supply voltage range of 2.7V to 5.5V and supports an input supply current of up to 8mA when downstream connected at 5.5V. The device features programmable disconnect from stuck buses via timeout circuitry (default 30ms) and rise time accelerators. It includes three address pins allowing for 27 distinct addresses and provides ALERT inputs for fault reporting. Operating temperature range is -40°C to +85°C.

Specialized Feature Summary

• Nested addressing capability for complex 2-wire bus systems
• Capacitance buffering and bus extension functionality
• Supply independent bidirectional buffer for SDA and SCL lines
• Programmable disconnect from stuck bus conditions

Specialized Applications

• Nested I2C bus systems requiring capacitance buffering
• Live insertion and removal applications in backplane environments
• Systems requiring isolated 2-wire bus multiplexing

Specialized Procurement Notes

Verify the specific suffix IGN indicates the SSOP package variant and the industrial temperature grade (-40°C to +85°C). Confirm PBF designation ensures lead-free compliance. Cross-reference the manufacturer's official ordering guide to ensure the selected package matches the PCB footprint requirements before finalizing procurement.

Specialized Selection Notes

Select this component when nested addressing and capacitive isolation are required for 2-wire bus expansion. Ensure the downstream bus pull-up voltages fall within the supported 2.2V to 5.5V range. Verify that the 16-lead SSOP package dimensions fit the available board space and thermal constraints for the intended operating environment.

Specialized Part Context

This part belongs to the LTC4305 family of 2-channel 2-wire bus multiplexers. It shares core functionalities such as bus buffering and stuck-bus protection with other variants like the DHD package versions. The primary distinction lies in the physical package type and the associated thermal characteristics defined by the SSOP form factor.

Specialized Replacement Considerations

LTC4305CDHD#PBF: Different package (DFN vs SSOP), same electrical function. LTC4305CGN#PBF: Same package and pinout, but commercial temperature range (0°C to 70°C) instead of industrial.