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Application circuit 1/2

BA7654F

Cautions on use

1.

Numbers and data in entries are representative design values and are not guaranteed values of the items.

2.

Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to

verify circuit characteristics for your particular application. Modification of constants for other externally connected circuits

may cause variations in both static and transient characteristics for external components as well as this Rohm IC. Allow

for sufficient margins when determining circuit constants.

3.

Absolute maximum ratings

Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range

(Topr), may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open

mode) when such damage is suffered. A physical safety measure, such as a fuse, should be implemented when using

the IC at times where the absolute maximum ratings may be exceeded.

4.

GND potential

Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the

GND at any time, regardless of whether it is a transient signal or not.

5.

Thermal design

Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd)

in actual states of use.

6.

Short circuit between terminals and erroneous mounting

Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other

components on the circuits, can damage the IC.

7.

Operation in strong electromagnetic field

Using the ICs in a strong electromagnetic field can cause operation malfunction.

8.

For clamp operation stability

Set the output impedance of the stage before a BA7654AF input pin no more than 1 kŸ.

Fig.4

Fig.5

When superimpossion is used

1

C.Video IN

6

3

5

7

2

4

IN 1

BA7654F

C.Video OUT

IN 2

Open

CTL

GND

Vcc

OUT

GND

8

0.01

C.Video IN

0.01

Logic

0.1

47

Vcc

47uF

0.1u

0.01uF

0.01uF

Vcc

Vcc

OUT

GND

GND

CTL

Open

IN2

IN1

C.Video OUT

C.Video IN

C.Video IN

Logic

BA7654F

6

7

8

4

2

5

3

1

0.01uF

47u

0.1u

C.Video IN

Logic

C.Video OUT/DC OUT

Vcc

BA7654F

GND

CTL

Open

IN2

IN1

Vcc

OUT

GND

DC1.7V or more

4

2

5

3

1

6

7

8