M52390FP Datasheet, PDF (1/22 Pages) Mitsubishi Electric Semiconductor – NTSC/PAL ENCODER

MITSUBISHI ICs (AV COMMON)
M52390FP
NTSC/PAL ENCODER
DESCRIPTION
The M52390FP is a single-chip semiconductor integrated circuit
which has a function to convert R/G/B signal to NTSC/PAL
composite video signal and the superimpose function.
FEATURES
RGB encode
•LPF for chroma difference signal is built-in. Cutoff frequency
control is possible by connecting a resistor externally.
•Because VCA circuit is built-in, gain control at chroma block is
possible.
•Carrier leak is on a low level because of built-in high-precision
modulation circuit and clamp circuit.
•Burst signal and sync signal are generated within the IC.
Superimpose function
•Ys IN (control input) is used for switching 2 input signals, VIDEO
IN and RGB IN.
•Because high-speed analog switch is built-in, even microscopic
characters can be inserted.
•Built-in an APC circuit to adjust tint of the parent picture (VIDEO
IN) and the RGB encode signal automatically.
Overall functions
•A drive circuit (75Ω) can be configured with one transistor by
outputting the video output signal at 2VP-P.
•This device can be used for both NTSC system and PAL system.
PIN CONFIGURATION (TOP VIEW)
GND 1
C.Sync IN 2
HHK 3
CLAMP R 4
3fsc TRAP 5
CLAMP B 6
VCXO 7
APC FILTER 8
VIDEO IN 9
VIDEO OUT 10
20 LPF fc CONT.
19 COLOR CONT.
18 R IN
17 G IN
16 B IN
15 Y OUT
14 Y IN
13 Vreg
12 Ys IN
11 VCC
Outline 20P2N-A
(Lead pitch:1.27mm)
APPLICATION
TV, VCR, monitor, and other AV equipments
RECOMMENDED OPERATING CONDITION
Supply voltage range .................................................... 4.7 to 5.3V
Rated supply voltage ................................................................ 5V
BLOCK DIAGRAM
LPF fc CONT.
COLOR
CONT.
R IN
0.72VP-P
20
19
18
LPF VCA
CONT CONT
CLAMP R
G IN
17
CLAMP G
MATRIX
B IN
Y OUT
16
15
1VP-P
CLAMP B
SYNC
C.SYNC ADD
Y IN
Vreg
14
13
0.5VP-P
VREG
Ys IN
12
VCC=5V
11
SWV
CONT
LPF
R-Y ^R
VCA CLAMP BURST
R
R
ADD R
NTSC : OFF
LPF VCA CLAMP BURST
B
B
B
ADD B
C.SYNC 1/2fh BFP(CP)
1/2 MMV HHK
1
2
3
Y
MOD
R
ADD
LIM
R
MOD
B
ADDd
LIM
B
X _{1/2fh at PAL}
90˚
SIFT
4
5
BPF
Y/C
MIX
(Y : 6dB)
NTSC
APC SW
SW V
PAL
AMP 2
HPF 2
BPFd
1/2fh
BFP
Y/C
MIXd
IDENT
VCXO
6
7
AMP 1
HPF 1
APC _BFP CLAMP V
6dB
AMP
1VP-P
8
9
2VP-P
10
GND C.Sync IN
HHK
CLAMP R 3fsc TRAP CLAMP B VCXO APC FILTER VIDEO IN VIDEO OUT