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PDF M52761FP Data sheet ( Hoja de datos )
| Número de pieza | M52761FP | |
| Descripción | PLL-SPLIT VIF/SIF IC | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
DESCRIPTION
The M52761 is IF signal-processing IC for VCRs and TVs. It enable
the PLL detection system despite size as small as that of
conventional quasi-synchronous VIF/SIF detector, IF/RF AGC, SIF
limiter, FM detector, QIF AGC and EQ AMP.
FEATURES
• Video detection output is 2VP-P. It has built-in EQ AMP.
• The video detector uses PLL for full synchronous detection
circuit. It produces excellent characteristics of DG, DP, 920kHz
beat, and cross color.
• Dynamic AGC realizes high speed response with double filter.
• Video IF and sound IF signal processings are separated from
each other. VCO output is used to obtain intercarrier.
This PLL-SPLIT method and built-in QIF AGC provide good
sound sensitivity and reduces buzz.
• As AFT output voltage uses the APC output voltage, VCO coil is
not used.
• Audio FM demodulation uses PLL system, so it has wide
frequency range with no external parts and no adjustment.
• This IC corresponds to only NTSC system.
APPLICATION
TV sets, VCR tuners
RECOMMENDED OPERATING CONDITION
In case of Vcc and Vreg. out short
Supply voltage range....................................................4.75 to 5.25V
Recommended supply voltage...................................................5.0V
In case of Vreg. out open
Supply voltage range......................................................8.5 to 12.5V
PIN CONFIGURATION (TOP VIEW)
RF AGC DELAY 1
AFT OUT 2
RF AGC OUT 3
VIF IN 4
VIF IN 5
GND 6
QIF DET IN 7
IF AGC FILTER 8
NFB 9
AUDIO OUT 10
20 EQ F/B
19 APC FILTER
18 VIDEO OUT
17 Vreg. OUT
16 VCO COIL
15 VCO COIL
14 Vcc
13 QIF OUT
12 IF AGC FILTER
11 LIMITER IN
Outline 20P4B (SP)
20P2N-A (FP)
BLOCK DIAGRAM
APC FILTER
Vreg. OUT
VCO COIL
QIF OUT
LIMITER IN
EQ F/B
VIDEO OUT
VCO COIL
Vcc IF AGC FILTER
20 19 18 17 16 15 14 13 12 11
VCO
Vcc REG
Inter
Split
LIM AMP
AFT
EQ
AMP
VIDEO
DET
APC
VIF AMP
RF AGC
QIF DET
QIF AGC
QIF AMP
FM DET
IF AGC
AF AMP
1234
RF AGC DELAY
RF AGC OUT
AFT OUT
VIF IN
5
VIF IN
6
GND
789
QIF DET IN
NFB
IF AGC FILTER
10
AUDIO OUT
1
1 page  
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
THE NOTE IN THE SYSTEM SETUP
M52761FP has 2 power supply pins of Vcc (pin 14) and Vreg.OUT
(pin 17) .
Pin 14 is for AFT output, RF AGC output circuits and 5V regulated
power supply circuit and Pin 17 is for the other circuit blocks.
In case M52761FP is used together with other ICs like VIF
operating at more than 5V, the same supply voltage as that of
connected ICs is applied to VCC and Vreg.Out is opened. The other
circuit blocks, connected to Vreg.OUT are powered by internal 5V
regulated power supply.
In case the connecting ICs are operated at 5V, 5V is supplied to
both VCC and Vreg.OUT.
INPUT SIGNAL
SG No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Signals (50Ω termination)
f0=58.75MHz AM20kHz 77.8% 90dBµ
f0=58.75MHz 90dBµ CW
f0=58.75MHz 90dBµ CW (Mixed signal)
f2=Frequency variable 70dBµ CW (Mixed signal)
f0=58.75MHz AM20kHz 77.8% level variable
f0=58.75MHz AM20kHz 14.0% level variable
f0=58.75MHz 80dBµ CW
f0=58.75MHz 110dBµ CW
f0=58.75MHz CW level variable
f0=Variable AM20kHz 77.8% 90dBµ
f0=Variable 90dBµ CW
f1=58.75MHz 90dBµ CW (Mixed signal)
f2=55.17MHz 80dBµ CW (Mixed signal)
f3=54.25MHz 80dBµ CW (Mixed signal)
f0=58.75MHz 87.5%
TM modulation ten-step waveform
sync tip level 90dBµ
f1=54.25MHz 95dBµ CW
f1=54.25MHz 75dBµ CW
f1=58.75MHz 90dBµ CW (Mixed signal)
f2=54.25MHz 70dBµ CW (Mixed signal)
f0=4.5MHz 90dBµ FM400Hz±25kHz dev
f0=4.5MHz level variable FM400Hz±25kHz dev
f0=4.5MHz 90dBµ AM400Hz 30%
f0=4.5MHz 90dBµ CW
TYPICAL CHARACTERISTICS
THERMAL DERATING (MAXIMUM RATING)
1750
1500
1250
1225
1000
750
637
500
250
0
-20 0 25 50 75 100 125 150
AMBIENT TEMPERATURE Ta (°C)
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet M52761FP.PDF ] | |
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