VIDEO OUT
VIDEO APC FILTER
VCO
VCO
FM DIRECT OUT
EXT AUDIO IN
AUDIO OUT
- (R-Y) IN
- (B-Y) IN
- (R-Y) OUT
SECAM REF.
- (B-Y) OUT
X-TAL 4.43
SYNC SEP IN
Y SW OUT
VCD GND
TV IN
CHROMA APC FILTER
EXT IN
AUDIO BYPASS
X-TAL 3.58
FAST BLK
KILLER FILTER
R IN
AFC2 FILTER
G IN
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
DESCRIPTION
The M52779SP is a single-chip semiconductor integrated circuit to
process signals of a color TV. Circuits to process video IF, sound IF,
video, color, and deflection signals, a I
2
C bus control circuit, and D/
A are build in this device.
This IC can be used not only for popular-type TV sets but also for
middle-class TV sets. Combined with a SECAM chroma decoder,
the M52325AP, this de vice can process signals of every type of TVs
in the world by discriminating them fully automatically.
FEATURES
•
A built-in I
number of peripheral parts and rationalize production lines.
Various filters (TRAP, BPF, Y-DL, RGB clamp) are build in this IC.
•
PLL detection system is introduced to process video IF and voice
•
IF. Furthermore, AFT coil is not necessary.
DL aperture control
•
Color signal frequency and vertical frequency of TVs of every
•
type can be discriminated fully automatically.
•
Horizontal/vertical countdown system
•
V-Ramp output
•
RGB output
•
Built in Y/C SW
2
C bus control circuit makes it possible to reduce the
1. Input SG3 and measure the rms value of output signal at pin 52.
2. P/N is defined as follows:
0NEG measured value (VP-P) ×10
P/N=20log
V
Measured value (mVrms)
BW Video frequency characteristics
1. Input SG4 and set the frequency f2 to 37.9MHz so that the beat
element of 1MHz is output to pin 52.
2. Then set the applied voltage at pin 4 so that the beat element of
1MHz at pin 52 may be 100dBµ.
3. Decrease f2 to the level at which the beat element becomes 3dB
smaller than the element of 1MHz, and read the value at that
level.
P52
100dBµ
1MHzBW
3
×0.7
(dB)
3dB
IM Intermodulation
1. Adjust the applied voltage at pin 4 so that the lowest output
signal voltage at pin 52 is 2.2V.
P52
2.2V
2. Measure elements of 1.07MHz and 4.43MHz of output at pin 52.
3. IM is defined as follows:
IM=20log
Element of 1.07MHz
Element of 4.43MHz
(dB)
ATT Maximum attenuation
1. Measure the element of 400Hz of output at pin 46.
ATT=20log
2.
V
Measured value
(dB)
0AFmax
LIM Input limiting sensitivity
Decrease the input level of SG 18. Measure the input level when
the element of 400Hz at pin 46 is 3dB smaller than V
0AFM (S6:
Maximum AF output (6.0M)).
Vin min. Input sensitivity
1. Decrease SG5 level until the video detector output is 3dB
smaller then the measured value of Parameter V3 “Video
detector output”.
Vin max. Maximum permissible input
1. Input 90dBu SG6.
2. VA is the output level at pin 52. Increase SG6 voltage until the
output at pin 52 becomes 3dB smaller than VA. The input levell at
that time is the maximum permissible input.
µAFTN AFT detector sensitivity (NEG)
V1HN Maximum AFT voltage (NEG)
V1LN Minimum AFT voltage (NEG)
See the following figure.
P1
5.0V
3.0V
V1HN
37.9Mz39.9MHzf0
∆f
V1LN
µAFTN is defined as follows:
µAFTN=
(5.0-3.0)×103mV
∆f kHz
(mV/kHz)
AMR
1. Vam is the element of 400Hz at pin 46.
2. AMR is defined as follows:
0AFS (mVrms)
AMR=20log
V
Vam (mVrms)
(dB)
AF S/N
1. Measure the noise (20Hz to 100kHz) of output at pin 46.
2. AF S/N is defined as follows:
AF S/N=20log
0AFmax
Measured value
(dB)
V
GEAu EXT Audio GAIN
Input SG22 at pin 47, and measure the output V
GAIN=20log
Input signal VP-P
Output signal VP-P (pin46)
Cn1 Output signal amplitude 1 (PAL)
Cn2 Output signal amplitude 2 (PAL)
1. Input SS4P to VI IN.
2. Measure output amplitude, Cn1 and Cn2, at pins 41 and 43
f
respectively.
P-P at pin 46.
(dB)
12
Page 13
MITSUBISHI ICs (TV)
M
1H
GND
M
2H
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
ACC1
1. Input VS4P (eb=570mV:level+6dB) to VI IN.
2. Measure the output amplitude at pin 43.
3. ACC1 is defined as follows:
A
CC1=20log
CC2
A
Measured value (V
Cn1 (VP-P)
P-P)
(dB)
1. Input VS4P (input level:20dB) to VI IN.
2. Measure the output amplitude at pin 41.
CC2 is defined as follows:
3. A
A
CC2=20log
Measured value (V
Cn1 (VP-P)
P-P)
(dB)
OL Chroma overload
1. Input VS4P (ec=800mV
P-P:chroma+3dB) to VI IN.
2. Measure the output amplitude at pin 41.
3. OL is defined as follows:
OL=20log
Measured value (V
Cn1 (VP-P)
P-P)
(dB)
VikP Threshold color killer on (PAL)
1. Input VS4P (level:variable) to VI IN at input level 0dB.
2. Lower the input level whth monitoring the output amplitude at pin
41 and measure the input level when output amplitude isnot
found.
KillP Residual color leakage at killer on (PAL)
1. Input VS4P (level:40dB) to VI IN.
2. Measure the output amplitude at pin 41.
4. R-YP is defined as follows:
V43×3.8
θR-Y P=tan
-1
V41×1.9
+45 (deg)
CC Residual carrier leakage
Measure the element of 4.43MHz of the demodulated output in noinput state.
DDH Offset of demodulated output by line
1. Input 4.2MHz CW (Vi=575mV
P-P) to VI IN.
2. Measure the center DC voltage of output beat amplitude for two
lines at pins 41 and 43. The absolute value of the difference in
DC voltage is the difference of demodulated output on line.
Cn3, Cn4 Output signal amplitude3, 4 (NTSC)
1. Input SS3N to VI IN.
2. Cn3 and Cn4 are output amplitude measured at pins 41 and 43
respectively.
VikN Threshold color killer on (NTSC)
1. Input VS3N (level:variable) to VI IN at input level 0dB.
2. Lower the input level with monitoring the output amplitude at pins
41 and measure the input level when output amplitude is not
found.
APC1 APC pull-in range 1
1. Input VS4P (f=eb=ec=variable) to VI IN.
2. Change the input signal frequency and measure the frequency
range from the point at which signal is output to pin 41 and to the
point that no signal is output to the pin. The reference value is
4.433619MHz.
R/B P Ratio of (R-Y/B-Y)
1. Input VS4P (eb=single chroma=ec+50kHz) to VI IN.
2. V41 is the output amplitude at pin 41.
3. V43 is the output amplitude at pin 43.
4. R /B P is defined as follows:
R/B P=20log
V43 (VP-P)
V41 (VP-P)
(dB)
θR-Y P Demodulation phase
1. Input VS4P (ed=single chroma=ec+50kNz) to VI IN.
2. V41 is the output amplitude at pin 41.
3. V43 is the output amplitude at pin 43.
13
KillN Residual color leakage at killer on (NTSC)
1. Input VS3N (level:-40dB) to VI IN.
2. Measure the output amplitude at pin 41.
APC2 APC Pull-in range 2
1. Input VS3N (f=eb=ec=variable) to VI IN.
2. Change the input signal frequency and measure the frequency
range from the point at which no signal is output to 41 pin and to
the point at which signal is output to the pin. (Pull-in state) The
reference value is 3.579545MHz.
R/B N Ratio of (R-Y/B-Y)
1. Input VS3N (eb=signal chroma=ec+50kHz) to VI IN.
2. V41 is the output amplitude at pin 41.
3. V43 is the output amplitude at pin 43.
4. R/B N is defined as follows:
R/B N=20log
V43 (VP-P)
V41 (VP-P)
(dB)
Page 14
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
θR-Y N Demodulation phase
1. Input VS3N (eb=single chroma=ec+50kHz) to VI IN.
2. V41 is the output amplitude at pin 41.
3. V43 is the output amplitude at pin 43.
4. R-YN is defined as follows:
V43×3.8
θR-YN=tan
-1
V41×1.9
+45 (deg)
TC1 Tint control 1, TC2 Tint control 2
1. Input VS3N (see the following figure) to VI IN. Based on the
output voltage at pin 41, find the absolute angle as shown in the
following figure.
-180°
A
0°90°
B
AUTO1 to 6 System identification1 to 6
Set to AUTO mode and confirm that bus for each output signal is
read correctly.
Ymax Maximum video output
1. Input SGA to VI IN
2. Measure the amplitude (
P-P) except that at blanking part of
output at pins 21, 22 and 23.
M
GY Video gain
1. Input SGA to VI IN
2. Measure the amplitude (
P-P) except that at blanking part of
output at pins 21, 22 and 23. This amplitude is defined as G1.
M =G1
GND
90°
A
B
θ
θ=tan
-1
(B/A)
0°
2. TC is defined as the angle when tint data is center (63).
TCmax is the angle when tint data is max,and TCmin is the
angle when tint data is min.
TC1=TCMAX-TC (deg)
TC2=TC-TCMIN (deg)
SRA SECAM REF output amplitude
SRD SECAM REF output DC voltage
Measure the amplitude (SRA) and DC voltage (SRD) of the element
of 4.43MHz of output at pin 42.
3. GY is defined as follows:
GY=20 log (G1V
P-P/0.714VP-P) (dB)
BW Video frequency characteristics
1. Input SGB (5MHz, 0.4VP-P) to VI IN.
2. Measure the amplitude (P-P) except that at blanking part of the
output at pin 22. The amplitude is defined as YB.
3. BW is defined as follow:
BW=20 log (YB VP-P /GY VP-P) (dB)
2AGY Pin38 output amplitude
1. Input SGA to VI IN.
2. Measure the amplitude (P-P) at pin 38 output.
CTR1 Chroma trap attenuation 1 (common to R/G/B output)
1. Input SS3N to VI IN. Measure the frequency level of 3.58MHz at
trap data 0. The level is defined as N
2. Measure output amplitude which is higher than the pedestal level
at pins21, 22 and 23. The amplitude at blanking part should not
be measured.
M
OFRG Offset voltage R-G, OFBG Offset voltage B-G
1. Measure DC voltage of output at pin 21, 22 and 23 except that at
blanking part .
2. OFRG and OFRB are defines as follows:
OFRG=
(pin 21 Measured voltage)-(pin 22 Measured voltage) (mV)
OFBB=
(pin 23 Measured voltage)-(pin 22 Measured voltage) (mV)
R (C) Cutoff R, G (C) Cutoff G, B (C) Cutoff B
1. Measure DC voltage of output at pin 21, 22 and 23 when R (C),
G (C) and B (C) data are maximum and minimum respectively.
The DC voltage at blanking part should not be measured.
2. R (C), G (C) and B (C) are defined as follows:
R (C), G (C) and B (C)=
(Voltage at data max.)-(Voltage at data min.) (V)
D (R) Drive R
1. Input SGA to VI IN.
2. Measure DRmin and DRmax which are output amplitude at pins
21 at D (R) data min and D (R) data max respectively.
3. G (R) is defined as follows:
G (R)=20log
DRmax (VP-P)
DRmin (VP-P)
(dB)
D (B) Drive B
1. Input SGA to VI IN.
2. Measure DBmin and DBmax which are output amplitude at pin
23 at D (B) data min and D (B) data max respectively.
3. D (B) is defined as follows:
D (B)=20log
DBmax (V
DBmin (VP-P)
P-P)
(dB)
DLF Y delay time 〈fine〉
1. Input SGA to VI IN.
2. Measure the time lag (absolute value) between signal YDL4 and
output signal at pins 21, 22 and 23.
Ccon1 Color control 1, Ccon2 Color control 2
1. Input SGE to -RIN (pin 45).
2. Measure output amplitude at pins 21 under each condition.
VMF Video mute
1. Input SGB to VI IN.
2. Measure output amplitude of the element of 4.43MHz when the
mute switch is on and off. (VMFon, VMFoff)
3. VMF is defined as follows:
VMF=20log
TRFon (VP-P)
TRFoff (VP-P)
(dB)
16
Page 17
MITSUBISHI ICs (TV)
P39 SYNC
HPT1, HPT2, HPT3
P13 H OUT
TH
VH
Measure the output pulse width
at pin 18, when 43kΩ at pin 10
is connected to 8V (VCC).
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
MTXB Matrix 1, MTXG Matrix 2
1. Input SGE to-B IN (pin 44).
2. Measure output amplitude at pins 22 and 23.
(P23=MTXB, P22=MTXG)
MTXR Matrix 3, MTXG1 Matrix 4
1. Input SGE to-R IN (pin 45 ).
2. Measure output amplitude at pins 21 and 22.
(P21=MTXR, P22=MTXG1)
OSD1 OSD speed 1, OSD2 OSD speed 2
1. Input SGD to FB, ER, EG and EB.
2. Measure rise time and fall time of the signal of output at pins 21,
22 and 23. Measurement points should be higher than the
pedestal level and blanking part should not be measured.
90%
10%
Output waveform at
pins21, 22 and 23.
M
OSD1
M
OSD2
GYmax1 Contrast 3, GYmin1 Contrast 4
1. Input SGA to VI IN.
2. Measure output amplitude at pina 21, 22 and 23 when 2.9V and
0V are extemally applied to pin 26.
ISS Sync separation input sensitivity current
Make current flow out from pin 39 and measure the flow current
when the free running frequency (=45Hz) changed at pin 18 .
FPH1 Horizontal pull-in range 1
FPH2 Horizontal pull-in range 2
Change the frequency of SGc and measure the frequency at the
moment when the output signal at pin 13 and the input signal at pin
39 are pulled in. The horizontal pull-in range is measured by
comparing with 15.625kHz.
Confirm that the frequency of output at pin 18 is the same at each
input frequency (pull-in state). Also, confirm the state of the bus
read mode (D7).
WVSS Vertical sync.detection minimum width
Change the input pulse width of SGd and measure the input pulse
width at the moment when the output signal at pin 18 and the input
signal at pin 39 are pulled in.
Rsi1 Vertical ramp size
Measure the pin18 amplitude.
Rs1 Vertical ramp size control range
1. Measure the pin 18 amplitude. (size data : max and min)
2.
Pin18 size max-pin18 size min
Rs1=
Rsi1
×100(%)
Rpo1 Vertical ramp position control range
1. Measure the pin 18 top voltage. ( position data : max and min )
2. Rpo1=pin 18 posi max - pin 18 posi min (mv)
Note: The timing and pulse width of the horizontal blanking pulse
should be as shown in the following figure by adjusting the variable
resistor of the single shot multi vibrator.
The variable resistor at pin 15 of the TTL IC, M74LS221P, is used to
fix the timing at 8µs and that at pin 7 is used to fix the pulse width at
12µs.
∗Coil adjustment
Rgc Vertical position center adjustment
1. Adjust the position bus data so that the output DC bias current at
pin18 and pin 19 should be equal.
2. Specify this position bus data adjusted above.
Rgr Vertical ramp out pulse width (PAL)
Measure the output pulse width
at pin 18, when 43kΩ at pin 10
is connected to 8V (VCC).
VCO COIL
1. Set the test conditions as shown in the parameter V14.
2. Input CW (fo=38.9MHz, Vi=90dBµ) to input pin A.
3. Set the DC voltage at pin 1 (AFT OUT) to 1/2Vcc (4.0V) by
adjusting VCO coil.
Note: VCO coil should always be adjusted as above before using
this IC.
18
Page 19
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
(The binary, Decimal and hexadecimal number table)
FunctionsBITDataCondition (change DATA 0-->MAX.)Intial condition
DELAY ADJ60 to 630
IF
VIDEO
CHROMA
INTERFACE
DEFLECTION
VCO ADJ60 to 6332
AUDIO ATT70 to 127gain min.-->max0
sharpness60 to 63soft-->sharp32
contrast cont70 to 127min.-->max32
tint cont70 to 127-45deg-->+45deg64
color cont70 to 127gain min.-->max32
bright cont70 to 127dark-->bright32
drive (R)60 to 63gain min.-->max32
drive (B)60 to 63gain min.-->max32
cut off (R)80 to 255low-->high0
cut off (G)80 to 255low-->high0
cut off (B)80 to 255low-->high0
peak ACL ADJ.40 to 15low-->high8
AFC-2 H phase40 to 15left-->right8
V-SIZE60 to 63min.-->max32
V-POSITION50 to 31low.-->high24
VILMin. input low voltage-0.5 1.5V
VIHMax. input high voltage 3.0 5.5V
fSCLSCL clock frequency 0.0 100kHz
tBUFTime the bus must be free before a new transmission can start 4.7−µs
tHD:STAHold time start condition. After this period the first clock pulse is generated 4.0−µs
LOWThe low period of the clock 4.7−µs
t
tHIGHThe high period of the clock 4.0−µs
tSU:STASetup time for start condition (Only relevant for a repeated start condition) 4.7−µs
tHD:DATHold time DATA 0.0−µs
tSU:DATSet-up time DATA250−ns
trRise time of both SDA and SCL lines−1000ns
tfFall time of both SDA and SCL lines− 300ns
tSU:STOSet-up time for stop condition 4.0−µs
f0=38.9MHz standard 10-step modulation
Sync ratio 28.6% AM=87.5%video modulation
Sync chip level 90dBµ
INPUT SIGNAL PARAMETERS INCLUDING
INPUT SIGNALS
1. Input signal name is four alphanumeric characters.
First character:Standard=S, Nonstandard=V
(Modified parts should be specified.)
Second character: Meaning of signal
Third character: Frequency of burst and chroma.
4 (4.433619MHz), 3 (3.579545MHz)
(In case of "S", SECAM standard signal is
applied.)
Fourth character: Color system
N (NTSC), P (PAL)
2. Structure of input color signal
The following figure shows the structure of color signal.
1) When S (standard) is used as the first character, the standard
color bar signal of each system is applied. H.sync should be
added for input clamp. (The frequencyof H.sync is fixed
according to the fourth character. P:50Hz, N:60Hz)
2) Amplitude and frequency of burst are represented as ed. In case
of standard signal, the amplitude is 285mV
P-P and the
frequency is shown by the third character.
3) Amplitude and frequency of chroma are represented as ec.
In case of standard signal, the amplitude is 570mVP-P and the
frequency is shown by the third character.
4) The following figure shows the phase of a PAL system signal.
ec(n)
eb(n)
eb(n+1)
ec(n+1)
R-Y
B-Y
24
Page 25
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
VIDEO/INTERFACE
SG No.Signal (50Ω termination)
PAL system PAL system APL100% standard video signal should be input as sync separation input as shown in the figure.
The vertical signal should be interlaced at 50Hz.
MITSUBISHI ICs (TV)
M52779SP
SGA
SGB
SGC
5us
2us7us
0.714VP-P
1VP-P
0.286VP-P
The frequency and amplitude of signal Lumi can be changed by signal SGA.
The typical amplitude is 0.714mV
P-P.
5us
2us7us
Sync
4µsec
Level : variable
SGD
SGE
SG50
SGF
SG60
0.5VP-P
Level : variable
typ=0.3VP-P
H=15.625kHz, V=50Hz
5us
NTSC System
Level : variable
typ=0.3VP-P
H=15.734kHz,
V=60Hz
0V
0.7V
20µ24µ
f=100kHz
f=3.58MHz
63.5µsec
20µ
1VP-P
0.714VP-P
0.286VP-P
Standard
NTSC SYNC
Standard
PAL SYNC
25
Page 26
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
DEFLECTION
SG No.Signal (50Ω termination)
The input signal should be PAL system APL-variable video signal.
Vertical should be interlaced at 50Hz.
64µsec
0.714VP-P
SGa
5µsec
0.286VP-P
2µsec7µsec
MITSUBISHI ICs (TV)
M52779SP
Pedestal
SGb
SGc
SGd
The input signal should be NTSC APL-variable video signal.
Vertical should be interlaced at 60Hz.
PAL/NTSC SYSTEM SINGLE-CHIP COLOR TV SIGNAL PROCESSOR
LOCK
SW
44
ππ
VCO
VCO
IF AGC
RF AGC
+–
ADJ
DELAY ADJ
50
49
4
3
OUT
(REV)
RF AGC
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
+B
8V
H Vcc
DEFLECTION Vcc
9
19
RAMP
SERVICE SW
VERTICAL
COUNT DOWN
50/60 OUT
EQ
ELIMINATE
PAL
DET
KILLER
BPF
CHROMA
VIDEO
CONTRAST
SHARPNESS
26
18
HORIZONTAL
BGP
GENE
SW
F/F
DL
TIME
TONE
17
V-SIZE
V-POSITION
H STOP
COUNT DOWN
TINT
CONT
PHASE
ID
Acc
DET
(ACC)
1ST AMP
SW
DL
FINE
TRAP
DELAY
X2
38
10
AFC-2
VCO
32FH
AFC GAIN
(H.FREEADJ)
AFC-1
DET
CHROMA
HPF
IN
Y/C
TRAP
CHROMA
F.TRAP
D.TRAP
VCXO
DET
APC
DET
MUTE
SW4
SW2
H-PHASE
MUTE
-(B-Y)
SW1
TV/EXT
8V
28
H. OUTPUT
OUT
1513
16
12
44
45
41
OUT
43
32
40
37
24
35
30
39
34
36
SCP
-(R-Y) -(B-Y)
-(R-Y)
*1
IN
IN
OUT
3.58
4.43
F.B.P
*3
5V
VIDEO CHROMA
(S/C)
1VP-P
(S/Y)
TV IN EXT VIDEO IN
1VP-P
5V
VFB
Vcc
Vcc
2VP-P
VP
*ATTENTION 1
2
1
6
85794
VERTICAL
3
9
12116 14 11
9
121016 3 13
54 8
103
1H DL
U3665M
15
167 8
SECAM
M52325AP
39
Need to add delay circuit when use
NTSC SYSTEM.
Vo
DY
*2
The peripheral constant is different
*ATTENTION 3
Need to add delay circuit when use
*ATTENTION 2
by Xtal (4.43MHz, 3.58MHz) used.
5
1HDL
SCP
IN
SECAM SYSTEM by 1HDL used.
29
Page 30
DESCRIPTION OF PIN
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
Pin No.Name
1AFT OUT
2LIMITER IN
DC voltage and
wave information
DC 0.2 to 7.7V
(Charge and discharge
current is 0.25mA max.)
FM signal input
(AC coupled)
Peripheral circuit of pinsDescription of function
HV
CC=8V
500
500
270k
〈AFT output pin〉
This pin is current output.
1k
1
to tuner
µ of PLL loop is
adjustable by external
resistor.
External resistor value is
270k//270kΩ typ.
500
500
5V
270k
20k
〈SIF detector input pin〉
5.6k
5.6k
2K
150
20.7p
150
10p
20k
100
0.01µ
2
Standard input level
is 100dBµ typ.
input impedance is
4.7kΩ typ.
8V
500
500
〈RF AGC output pin〉
3
RE AGC
OUT
DC 0.1 to 7.8V
50
3
2k
2k
5V
0.1µ
current output type.
Charge and discharge
current is 0.4mA max.
〈IF AGC filter pin〉
charge current
POS : 1µA
4IF AGC filterDC 1.9 to 4.6V
1k
4
NEG : 10µA
discharge current
POS : 4mA
7.5k
0.1µ
5GND−−
NEG : 400µA
〈ground pin of VIF
block〉
30
Page 31
DESCRIPTION OF PIN (cont.)
Pin No.Name
6
7
VIF IN1.4V
DC voltage and
wave information
MITSUBISHI ICs (TV)
M52779SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
Peripheral circuit of pinsDescription of function
5V
6
bias
7.5k
1.2k
1.2k
60
320
320
7
〈VIF detector input pin〉
input impedance is 900Ω,
5pF typ.
pay attention to matching
SAW
with SAW filter.
8VIF V
CC (5V)5.0V−
9H VCC (8V)8.0V−
8V
9µ
DC 3.4V typ
10RAMP AGC
(charge current is 9µA
and discharge current is
170µA typ.)
10k500
45.6k
11SCL−
6k
〈power supply for
VIF block〉
5.0V typ.
〈power supply for
DEFLECTION and VIF/
SIF output stage〉
8.0V typ.
〈vertical ramp AGC
8V
filter pin〉
1.2k
10
33µ
5V
this pin is sensitive to
current leakage.
Pay attention to PCB
layout and external
components.
Pulling up this pin to Vcc
(8V) with R=47kΩ,
pin 18 output is
"V pulse" type.