PCA9507 データシートの表示（PDF） - NXP Semiconductors.
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PCA9507 Datasheet PDF : 20 Pages
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NXP Semiconductors
PCA9507
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
7. Application design-in information
A typical application is shown in Figure 6. In this example, the system master is running
on a 3.3 V I2C-bus while the slave is connected to a 5 V bus. Both buses run at 400 kHz.
Master devices can be placed on either bus. HDMI DDC applications for DVD/R and
LCD TV are shown in Figure 7 and Figure 8, respectively. In these applications the HDMI
transmitter or receiver is 3.3 V, while the DDC line is 5 V, PCA9507 behaves like a voltage
level shift, a buffer and long cable bus extender to ensure signal integrity for accessing the
EDID on the DDC line.
3.3 V
5V
10 kΩ
SDA
SCL
BUS
MASTER
400 kHz
10 kΩ
10 kΩ
VCC(B) VCC(A)
SDAB
SDAA
SCLB
SCLA
PCA9507
EN
10 kΩ
SDA
SCL
SLAVE
400 kHz
bus B
Fig 6. Typical application
bus A
002aad403
3.3 V
10 kΩ
(optional)
HDMI
TRANSMITTER
10 kΩ 10 kΩ
0.1 µF
0.1 µF
VCC(B) VCC(A)
PCA9507
SDAB
SDAA
SCLB
SCLA
EN
GND
1.5 kΩ
to
2.0 kΩ
5V
1.5 kΩ
to
2.0 kΩ
22 Ω
HDMI cable
DDC line
22 Ω
DVD/R or STB
Fig 7. Source or DVD/R, STB application
LCD TV (sink)
PCA9507
PCA9512A
PCA9517
PCA9515
002aad404
3.3 V
10 kΩ
(optional)
10 kΩ 10 kΩ
HDMI
RECEIVER
Fig 8. Sink or LCD TV application
PCA9507_1
Product data sheet
0.1 µF
0.1 µF
VCC(B) VCC(A)
PCA9507
SDAB
SDAA
SCLB
SCLA
EN
GND
5V
47 kΩ
22 Ω
HDMI cable
DDC line
22 Ω
LCD TV
Rev. 01 — 7 February 2008
DVD (source)
PCA9507
PCA9512A
PCA9517
PCA9515
002aad405
© NXP B.V. 2008. All rights reserved.
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