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
C.Sync IN
HHK
CLAMP R
3fsc TRAP
CLAMP B
VCXO
APC FILTER
VIDEO IN
VIDEO OUT
1
2
3
M52390FP
4
5
6
7
8
9
10
Outline 20P2N-A
(Lead pitch:1.27mm)
LPF fc CONT.
20
COLOR CONT.
19
R IN
18
G IN
17
B IN
16
Y OUT
15
Y IN
14
Vreg
13
Ys IN
12
V
CC
11
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.
20191817161514131211
LPF
CONT
R-Y
C.SYNC 1/2fh BFP(CP)
VCA
CONT
R
B
12345678910
GNDC.Sync IN
COLOR
CONT.
0.72VP-P
CLAMP RCLAMP GCLAMP B
BFP
CLAMPRBURST
CLAMP
HHK
C.SYNC
B
C.SYNC
ADD R
NTSC : OFF
BURST
ADD B
R ING INB INY OUTY IN
1VP-P0.5VP-P
SYNC
ADD
ADDd
1/2fh at PAL
3fsc TRAP
C.SYNC
BPFd
1/2fh
BFP
CLAMP B
(Y : 6dB)
Y/C
MIXd
IDENT
VCXO
VCXOAPC FILTER VIDEO IN
HHK
MATRIX
˚
SIFT
CLAMP R
X
NTSC
PAL
VREG
APC
Vreg
APC SW
BFP
Ys INVCC=5V
SWV
CONT
SW V
AMP 2
AMP 1
CLAMP V
1VP-P
HPF 2
HPF 1
2VP-P
VIDEO OUT
AMP
B
MITSUBISHI ICs (AV COMMON)
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted)
SymbolRatingsParameter
CC
V
Pd
Topr
Tstg
K
Values in parentheses are those measured when the IC is mounted on a standard board.
Supply voltage
Power dissipation
Operating temperature