EL4581

FN7172 Rev 2.00

Page 3 of 10

November 12, 2010

Pin Descriptions

PIN NUMBER

PIN NAME

FUNCTION

1

Composite Sync Out

Composite sync pulse output. Sync pulses start on a falling edge and end on a rising edge.

2

Composite Video in

AC coupled composite video input. Sync tip must be at the lowest potential (Positive picture phase).

3

Vertical Sync Out

Vertical sync pulse output. The falling edge of Vert Sync is the start of the vertical period.

4

GND

Supply ground.

5

Burst/Back Porch Output

Burst/Back porch output. Low during burst portion of composite video.

6

RSET (Note 8)

An external resistor to ground sets all internal timing. 681k, 1% resistor will provide correct timing

for NTSC signals.

7

Odd/Even Output

Odd/Even field output. Low during odd fields, high during even fields. Transitions occur at start of

Vert Sync pulse.

8V

DD 5V

Positive supply. (5V)

NOTE:

Typical Performance Curves

FIGURE 5. VERTICAL PULSE WIDTH vs TEMPERATURE

FIGURE 6. SUPPLY CURRENT vs TEMPERATURE

1000

900

800

700

600

500

400

300

200

100

10

15

20

25

30

35

40

45

50

FREQUENCY (kHz)

CLAMP TIME (µs)

02

46

8

10

200

400

600

800

1000

0

200

400

600

800

1000

0

0

200

400

100

300

500

VERTICAL PULSE WIDTH (µs)

200

400

600

800

1000

0

DELAY TIME (µs)

040

80

20

60

100

150

200

250

300

350

-55

5

65

-25

35

95

125

TEMPERATURE (°C)

0.5

1.0

1.5

2.0

-55

5

65

-25

35

95

125

TEMPERATURE (°C)