PCA9527DP 데이터 시트보기 (PDF) - NXP Semiconductors.
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PCA9527DP Datasheet PDF : 22 Pages
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NXP Semiconductors
PCA9527
3-channel bidirectional bus extender for HDMI, I2C-bus and SMBus
7. Application design-in information
A typical application is shown in Figure 5. 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 6 and Figure 7, respectively. In these applications the HDMI
transmitter or receiver is 3.3 V, while the DDC line is 5 V, PCA9527 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
10 kΩ 10 kΩ
VCC(B)
SDAB
SCLB
10 kΩ
VCC(A)
SDAA
SCLA
10 kΩ 10 kΩ
SDA
SCL
BUS
MASTER
400 kHz
INTR or RESET
CECB
CECA
PCA9527
EN
INTR or RESET
SLAVE
400 kHz
bus B
Fig 5. Typical application
bus A
002aad971
3.3 V
10 kΩ
(optional)
HDMI
TRANSMITTER
0.1 µF
0.1 µF
10 kΩ 10 kΩ 10 kΩ
VCC(B) VCC(A)
PCA9527
SDAB
SDAA
SCLB
SCLA
CECB
CECA
EN
GND
Fig 6. Source or DVD/R, STB application
2.7 kΩ
5V
1.5 kΩ
to
2.0 kΩ
(2×)
22 Ω
HDMI cable
DDC line
22 Ω
DVD/R or STB
LCD TV (sink)
PCA9507
PCA9512A
PCA9515
PCA9517
PCA9527
002aad972
PCA9527_1
Product data sheet
Rev. 01 — 29 June 2009
© NXP B.V. 2009. All rights reserved.
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