BT856 데이터 시트보기 (PDF) - Unspecified

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BT856

YCrCb or RGB to NTSC/PAL Digital Video Encoder

Unspecified 

Bt856/7

CIRCUIT DESCRIPTION

Outputs

Figure 10. 625-Line (PAL–B, D, G, H, I, N, N-Argentina) Y (Luminance) Video Output Waveform

MA

V

26.68 1.000

8.00 0.300

400

368

316

284

236

204

152

WHITE LEVEL

BLACK/BLANK LEVEL

0.00 0.000

SYNC LEVEL

Note: Typical with 37.5 Ω load, VREF_IN = VREF_OUT, setup off, and nominal RSET. CCIR 624 levels are

assumed. 100% saturation (100/0/100/0) color bars are shown.

Table 3. 625-Line (PAL–B, D, G, H, I, N, N-Argentina) Y (Luminance) Video Output Truth Table

Description

Iout (mA)

DAC Data

Sync Interval

BLANK*

White

26.68

400

0

1

Black

8.00

120

0

1

Blank

8.00

120

0

0

Sync

0

0

1

0

Note: Typical with 37.5 Ω load, VREF_IN = VREF_OUT, setup off, and nominal RSET. CCIR 624 levels are assumed.

100% saturation (100/0/100/0) color bars are shown.

Brooktree®

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