1. Products
  2. Interface and Isolation
  3. Serial Bus Buffers, Extenders, and Accelerators
  4. LTC4307-1


Features and Benefits

  • Bidirectional Buffer for Display Data Channel (DDC)
  • Compliant with HDMI Specifi cation Version 1.3 DDC Capacitance Requirement
  • Level Translation Between 3.3V and 5V
  • ±5kV Human Body Model ESD Protection
  • 60mV Buffer Offset Independent of Load
  • Compatible with Non-Compliant VOL I2C Devices
  • Isolates Input SDA and SCL Line from Output
  • Compatible with I2C, I2C Fast Mode and SMBus
  • READY Open-Drain Output
  • High Impedance SDA, SCL Pins for VCC = 0V
  • Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

Product Details

The LTC4307-1 is a 2-wire bus buffer that provides capacitance buffering between input and output. The HDMI specification requires that devices have less than 50pF of input capacitance on their DDC bus lines. The LTC4307-1’s capacitance buffering feature, in conjunction with its sub-10pF data and clock input capacitance, allows HDMI components to easily meet the 50pF requirement and tolerate high capacitance on the internal bus.

The LTC4307-1 also provides level-shifting between 3.3V and 5V systems to allow lower voltage HDMI transmitters, receivers and EEPROM to interface to the 5V DDC bus. READY is an open-drain digital output flag that indicates whether or not the input and output busses are connected and can interface to the HDMI hot plug detect (HPD) signal. When driven high, the ENABLE digital input allows the LTC4307-1 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between the input and output busses.


  • HDMI
  • 3.3V/5V Level Translation
  • Capacitance Buffer/Bus Extender

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

LTC4307-1 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC4307CDD-1#PBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
LTC4307CDD-1#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
LTC4307CMS8-1#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC4307CMS8-1#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC4307IDD-1#PBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
LTC4307IDD-1#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
LTC4307IMS8-1#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC4307IMS8-1#TRPBF Material Declaration Reliability Data 8-Lead MSOP
Wafer Fabrication Data R527 Reliability Data

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Sample & Buy

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Buy Now Pricing

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List Pricing

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Lead Times

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