LTC4307-1 APPLICATIONS INFORMATION Figure 4 shows the LTC4307-1 being used for capacitance Although the applications shown in this section are for buffering and 5V to 3.3V level shifting. In this application, HDMI receive channels, the LTC4307-1 can also be used the EEPROM is powered by a backup 3.3V supply that is in HDMI transmit channels with equal success as shown available when the component is turned off. The EDID in in the Typical Application on the last page of this data the EEPROM should be available for reading even when sheet. a component’s power is off. EEPROM 5V 5V VCC C1 R1 R2 R4 R5 SCL SDA GND 3.3V 0.1μF R6 R7 R8 1.8k 1.8k 47k 1k LTC4307-1 100k 10k 10k R9 R10 READY VCC SDA 10k 10k SDAOUT TO SDAIN SCL HDMI HDMI CABLE SCLOUT SCLIN HDMI TX IC HPD RX IC ENABLE R3 DDC GND 100k DDC/CEC GROUND HDMI SOURCE HDMI SINK (DVD PLAYER) (DIGITAL TV) 43071 F03 Figure 3. The LTC4307-1 in HDMI Capacitance Buffering Application SWITCHED 3.3V BACKUP 3.3V EEPROM 5V 5V VCC C1 R1 R2 R3 R4 SCL SDA HDMI 0.1μF R5 R6 R7 1.8k 1.8k 47k 47k LTC4307-1 RX IC 100k 10k 10k READY VCC TO SDA SDAIN SDAOUT HDMI SCL HDMI CABLE SCLIN TX IC SCLOUT DDC ENABLE GND DDC/CEC μC GROUND HDMI SOURCE HDMI REPEATER (DVD PLAYER) (DIGITAL RECEIVER) 43071 F04 Figure 4. The LTC4307-1 in a Level Shifting and Capacitance Buffering HDMI Application with Backup 3.3V 43071fa 10