ltc4307-1 Linear Technology Corporation, ltc4307-1 Datasheet - Page 10

• Manufacturer Part Number: ltc4307-1
• Description: High Definition Multimedia Interface Hdmi Level-shifting 2-wire Bus Buffer
• Manufacturer: Linear Technology Corporation

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