LTC4307-1 데이터 시트보기 (PDF) - Linear Technology

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LTC4307-1

High Defi nition Multimedia Interface (HDMI) Level-Shifting 2-Wire Bus Buffer

Linear Technology 

LTC4307-1

APPLICATIONS INFORMATION

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.

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.

5V

R1 R2

1.8k 1.8k

SDA

TO

HDMI

SCL

TX IC HPD

R3

DDC/CEC

100k

GROUND

HDMI SOURCE

(DVD PLAYER)

HDMI CABLE

5V

C1

0.1μF

R4 R5

47k 1k

LTC4307-1

READY VCC

SDAOUT SDAIN

SCLOUT SCLIN

ENABLE

DDC

GND

HDMI SINK

(DIGITAL TV)

EEPROM

VCC

R6 R7 R8 SCL SDA GND

100k 10k 10k

Figure 3. The LTC4307-1 in HDMI Capacitance Buffering Application

3.3V

R9 R10

10k 10k

HDMI

RX IC

43071 F03

5V

R1 R2

1.8k 1.8k

TO SDA

HDMI SCL

TX IC

DDC/CEC

GROUND

HDMI CABLE

5V

R3 R4

47k 47k

LTC4307-1

READY VCC

SDAIN SDAOUT

SCLIN SCLOUT

DDC

ENABLE

GND

BACKUP 3.3V

C1

0.1μF R5 R6 R7

100k 10k 10k

SWITCHED

3.3V

EEPROM

VCC

SCL SDA

HDMI

RX IC

μC

HDMI SOURCE

(DVD PLAYER)

HDMI REPEATER

(DIGITAL RECEIVER)

43071 F04

Figure 4. The LTC4307-1 in a Level Shifting and Capacitance Buffering HDMI Application with Backup 3.3V

43071fa

10

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