BT856 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

BT856

YCrCb or RGB to NTSC/PAL Digital Video Encoder

Unspecified 

CIRCUIT DESCRIPTION

Outputs

Figure 9. 525-Line (NTSC/PAL–M) Y (Luminance) Video Output Waveform

Bt856/7

MA

V

26.68 1.000

100 IRE

9.07 0.340

7.60 0.285

0.00 0.000

7.5 IRE

40 IRE

400

370

321

291

245

215

166

WHITE LEVEL

BLACK LEVEL

BLANK LEVEL

SYNC LEVEL

Note: Typical with 37.5 Ω load, VREF_IN = VREF_OUT, Nominal RSET, and setup on. SMPTE 170 M levels are

assumed. 100% saturation color bars (100/7.5/100/7.5) are shown.

Table 2. 525-Line (NTSC/PAL–M) Y (Luminance) Video Output Truth Table

Description

Iout (mA)

DAC Data

Sync Interval

BLANK*

White

26.68

400

0

1

Black

9.07

136

0

1

Blank

7.60

114

0

0

Sync

0

0

1

0

Note: Typical with 37.5 Ω load, VREF_IN = VREF_OUT, Nominal RSET, and setup on. SMPTE 170 M levels are

assumed. 100% saturation color bars (100/7.5/100/7.5) are shown.

22

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