GS1881, GS4881, GS4981 Monolithic Video Sync

Separators

Data Sheet

6926 - 5

November 2009

7 of 29

Proprietary & Confidential

(a) Delay from Rising Edge of Sync

400

500

650

ns

(b) Pulse Width

2.0

2.5

3.2

μs

(c) Occurrence Rate

H

H

H

–

Vertical Sync Out (Pin 3)

(a) Pulse Width

Serrations during vertical interval

197.7

197.7

197.7

μs

(b) Default Starting Time

No serrations during vertical interval

48

65

82

μs

Horizontal Sync Out (Pin 7)

(a) Delay From Video

90

190

290

ns

(b) Pulse Width

5.0

7.0

9.0

μs

Horizontal Scan Rate

15

–

130

kHz

Logic Outputs

4.2

4.6

–

V

11.2

11.6

–

V

1.6mA

2.4

3.4

–

V

See Note 3.

9.4

10.4

–

V

–

0.3

0.6

V

NOTES:

possible to Pin 6. Care should also be taken to avoid parasitic capacitive coupling from any output pin (Pins 1, 3, 5 and 7) to Pin 6.

2. Measured from slicing point of input falling edge to 50% point of composite sync falling edge.

3. Applies only to composite sync, vertical sync, and back porch outputs. Horizontal sync has a passive 10k

Table 2-3: GS4981 Electrical Characteristics (Continued)

Parameter

Conditions

Min

Typ

Max

Units