PCA9507_1

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 7 February 2008

7 of 20

NXP Semiconductors

PCA9507

7.

Application design-in information

A typical application is shown in Figure 6. In this example, the system master is running

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.

Fig 6.

Typical application

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PCA9507

SDAB

SDAA

SCLB

SCLA

EN

10 k

Ω

10 k

Ω

SDA

SCL

BUS

MASTER

400 kHz

SLAVE

400 kHz

SDA

SCL

bus B

bus A

5 V

3.3 V

10 k

Ω

10 k

Ω

Fig 7.

Source or DVD/R, STB application

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SDAB

SDAA

SCLB

SCLA

1.5 k

Ω

to

2.0 k

Ω

10 k

Ω

(optional)

GND

10 k

Ω

EN

3.3 V

0.1

µF

10 k

Ω

HDMI

TRANSMITTER

PCA9507

0.1

µF

1.5 k

Ω

to

2.0 k

Ω

5 V

HDMI cable

DDC line

LCD TV (sink)

PCA9507

PCA9512A

PCA9517

PCA9515

DVD/R or STB

22

Ω

22

Ω

Fig 8.

Sink or LCD TV application

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SDAB

SDAA

SCLB

SCLA

10 k

Ω

(optional)

GND

10 k

Ω

EN

3.3 V

0.1

µF

10 k

Ω

HDMI

RECEIVER

PCA9507

0.1

µF

47 k

Ω

5 V

HDMI cable

DDC line

DVD (source)

PCA9507

PCA9512A

PCA9517

PCA9515

LCD TV

22

Ω

22

Ω