The bypass capacitors should include a 0.1µF ceramic

surface-mount capacitor between each supply pin and

the ground plane, located as close to the package as

possible. Optionally, place a 10µF tantalum capacitor

at the power-supply pins’ points of entry to the PC

board to ensure the integrity of incoming supplies. The

power-supply trace should lead directly from the tanta-

parasitic inductance, keep PC traces short and use

surface-mount components.

Use surface-mount resistors for input termination and

output back termination. Place the termination resistors

as close to the IC as possible.

Graphics Video Sync Adder/Extractor

10

______________________________________________________________________________________

VIDEO INPUT

(IN_)

HOR. SYNC

(HSYNC)

VER. SYNC

(VSYNC)

RED OUTPUT

(OUT_R)

BLUE OUTPUT

(OUT_B)

GREEN OUTPUT

(OUT_G)

0V

0.7V

0V

0V

0V

0V

0V

-2.4V

-2.4V

1.4V

-2.4V

1.4V

1.4V

5V

5V

Figure 2. MAX9539 Input and Output Functionality

VIDEO OUTPUT

(OUT_R/B/G)

SYNC OUTPUT

(_SYNC)

0V

1.4V

0V

5V

VIDEO WITH

SYNC

(IN_)

0.7V

-2.4V

Figure 3. MAX9540 Input and Output Functionality

POSITIVE SYNC

NEGATIVE SYNC

+5V

0V

+5V

0V

Figure 4. Sync Pulse Polarity