M52390 Mitsubishi, M52390 Datasheet - Page 17

• Manufacturer Part Number: M52390
• Description: NTSC/PAL ENCODER
• Manufacturer: Mitsubishi

RGB CHARACTER SIGNAL INPUT
(*RGB child picture signal input after processing time axis)
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.)
Example of Xtal:Nippon denpa industry Co., Ltd. AT-51
COMPOSITE
Sync.
2.5V
Ys
R
G
B
0.71V
(NTSC = 3.579545MHz)
(PAL
P-P
FILTER CONT
COLOR CONT
= 4.433619MHz)
GND
R-Y
B-Y
GND
20
1
BURST
BURST
ADD
ADD
R-Y
B-Y
19
2
MMV
18
3
RIN
R-Y CLAMP
MOD
MOD
R-Y
B-Y
MATRIX
CLAMP
17
4
GIN
Ys DL
(350ns)
16
5
BIN
MIX
B-Y CLAMP
Sync.
Y
ADD
15
6
BPF
VCXO
Y/C
MIX
14
7
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.).
Xtal
1k
2.1V
V
(Hi=R,G,B)
APC
V
TH
13
reg
8
+
=1.5V
VIDEO
IN
Main picture NTSC/PAL
video signal input
CLAMP
12
9
V
AMP
6dB
11
10
Recommended Y DL (360ns):
Toko Co., Ltd. TH317LSOS-3287
CC
NTSC/
SUPER-
IMPOSE
SW
PAL
VIDEO
MITSUBISHI ICs (AV COMMON)
OUT
NTSC/PAL VIDEO OUTPUT
(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.
+
NTSC/PAL ENCODER
M52390FP
Unit Resistance :
V
CC
Capacitance : F
=5V