BT856 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

BT856

YCrCb or RGB to NTSC/PAL Digital Video Encoder

Unspecified 

Bt856/7

CIRCUIT DESCRIPTION

Outputs

Figure 12. 625-Line (PAL–B, D, G, H, I, N, N-Argentina) C (Chrominance) Video Output Waveform

MA

V

28.88 1.083

21.08 0.791

17.07 0.640

13.07 0.490

Color Burst

(10 Cycles)

BLANK

LEVEL

5.27 0.198

Note: Typical with 37.5 Ω load, VREF_IN = VREF_OUT, nominal RSET, Chroma on, and setup off. CCIR 624 lev-

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

Table 5. 625-Line (PAL–B, D, G, H, I, N, N-Argentina) C (Chrominance) Video Output Truth Table

Description

Iout (mA)

DAC Data

Sync Interval

BLANK*

Peak Chroma (High)

28.88

433

x

1

Burst (High)

21.08

316

x

x

Blank

17.07

256

x

0

Burst (Low)

13.07

196

x

x

Peak Chroma (Low)

5.27

79

x

1

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

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

Brooktree®

25

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