DESCRIPTION
The LTC4307-1 is a 2-wire bus buffer that provides capacitance buffering between input and output. The HDMI specifi cation 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.

FEATURES
■ 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 I2CTM, 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

APPLICATIONS
■ HDMI
■ 3.3V/5V Level Translation
■ Capacitance Buffer/Bus Extender