M52390FP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M52390FP

NTSC/PAL ENCODER

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (AV COMMON)

M52390FP

NTSC/PAL ENCODER

APPLICATION EXAMPLE (2)

Superimposing RGB Character Signal on NTSC/PAL Signal

(*The case that RGB signal of personal computers, etc. is

superimposed on NTSC/PAL signal as a child picture is mentioned

in parentheses.)

RGB CHARACTER SIGNAL INPUT

(*RGB child picture signal input after processing time axis)

In case that the signal which is about 350ns behind the character

(*child picture) RGB signal is directly generated as Ys signal, Ys

DL is not necessary. When the timing of RGB coincides with that of

Ys, set the delay time of Ys DL to 350ns (typ.).

Ys

R

0.71VP-P

G

B

COMPOSITE

Sync.

2.5V

Ys DL

(350ns)

VTH=1.5V

(Hi=R,G,B)

+

1k

Recommended Y DL (360ns):

Toko Co., Ltd. TH317LSOS-3287

VCC=5V

+

20 19

FILTER CONT

COLOR CONT

R-Y

BURST

R-Y ADD

18 17 16 15

RIN GIN

CLAMP

MATRIX

BIN

Sync.

ADD

Y

R-Y

MOD

14 13

2.1V

Vreg

Y/C

MIX

12 11

VCC

NTSC/

PAL

SUPER-

IMPOSE

SW

B-Y B-Y

BURST

ADD

B-Y

MOD

MIX BPF

APC

6dB

AMP

GND

1

MMV

R-Y CLAMP

2

3

4

VCXO

B-Y CLAMP

Xtal

CLAMP

VIDEO

IN

5

6

7

8

9

VIDEO

OUT

10

(Note)

Drive at low impedance

because character RGB signal

and main picture video signal

are clamped by IC input. In

case that character RGB

signal is generated at the

same timing with that of main

picture input signal, delay the

main picture input signal about

370ns. The timing to insert

characters is delayed. In

inputting Composite Sync,

input the sync signal of the

main picture.

GND

Example of Xtal:Nippon denpa industry Co., Ltd. AT-51

(NTSC = 3.579545MHz)

(PAL = 4.433619MHz)

NTSC/PAL VIDEO OUTPUT

Main picture NTSC/PAL

video signal input

Unit Resistance : Ω

Capacitance : F

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