LTC4307IDD-1#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4307IDD-1#PBF is a bidirectional 2-wire bus buffer designed for High Definition Multimedia Interface (HDMI) Display Data Channel (DDC) applications. It provides capacitance buffering and level translation between 3.3V and 5V systems. The device features sub-10pF input capacitance to meet HDMI DDC requirements, ±5kV HBM ESD protection, and a 60mV buffer offset. It operates with a supply voltage range of 2.3V to 5.5V, supports I²C Fast Mode up to 600kHz, and includes an open-drain READY output for hot plug detect control. The component is housed in an 8-lead (3mm × 3mm) Plastic DFN package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Capacitance buffering isolates internal bus capacitance from the HDMI connector to ensure compliance with DDC specifications.
• Level shifting enables communication between 3.3V devices and 5V DDC buses while protecting lower voltage components.
• READY digital output indicates connection status and can control the HDMI hot plug detect signal.

Signal Buffers, Repeaters, Splitters Applications

• HDMI receiver channels for capacitance buffering and level shifting
• HDMI transmitter channels for DDC interface isolation
• Systems requiring backup 3.3V EEPROM access during power-off states

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF confirms lead-free finish and tube packaging. Confirm the IDD-1 designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure compatibility with the required 8-lead DFN footprint. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when HDMI DDC capacitance limits must be met without external buffering components. Choose this part over the standard LTC4307 if level shifting between 3.3V and 5V supplies is required. Verify that the system does not require stuck bus recovery features, as these are omitted in the -1 variant. Ensure the operating environment falls within the specified industrial temperature range.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4307-1 series, specifically optimized for HDMI applications. Unlike the general-purpose LTC4307, it omits pre-charge and stuck bus recovery functions but adds level-shifting capabilities. It is distinct from other bus buffers like the LTC4300 or LTC4301 which support hot swapping or address expansion.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4307CDD-1#PBF: Commercial temperature grade (0°C to 70°C). LTC4307IMS8-1#PBF: Industrial temperature grade (-40°C to 85°C) in MSOP package. LTC4307CMS8-1#PBF: Commercial temperature grade in MSOP package.