MITSUMI
Sync Detector MM1021
Sync Detector
Monolithic IC MM1021
Outline
This IC is a sync detection circuit for obtaining the best reception state on VCR and TV channel selection
systems. A system with high detection precision and no adjustment required can be configured due to the PLL
format using a ceramic resonator. It can also be used in OSD circuits for blue-back switching and the like.
Features
1. High precision due to use of PLL format
2. Ceramic resonator means no adjustment required
3. Ceramic resonator can be selected for use in either PAL or NTSC
4. Designed for use in video equipment channel selection systems
5. Can also be used as an OSD circuit for blue back switching, etc.
Package
SIP-10A (MM1021XS)
Applications
1. TV
2. VCR
3. Other video equipment
Block Diagram
Pin no.
Pin name
Internal equivalent circuit diagram
Pin no.
Pin name
Internal equivalent circuit diagram
MITSUMI
Sync Detector MM1021
Pin Description
1 OSC OUT 6 VIDEO IN
2 OSC IN1
7
Discrimination
of sync sensor
adjustment
3 OSC IN2 8 COMP IN
10
COMP OUT
4 Phase
comparison
output
5 GND
9 VCC
MITSUMI
Sync Detector MM1021
Absolute Maximum Ratings
(Ta=25°C)
Electrical Characteristics
(Except where noted otherwise, Ta=25°C, VCC=9.0V, SW1=ON, SW2~SW7=1)
Item Symbol Ratings Units
Storage temperature T
STG
-
40~+125 °C
Operating temperature T
OPR
-
20~+75 °C
Power supply voltage V
CC 14.0 V
Allowable loss Pd 500 mW
Item
Symbol
Measurement
Measurement conditions Min. Typ. Max. Units
circuit
Operating power supply voltage range
VCC
--
7.0 9.0 13.0 V
Consumption current Id
-
SW1=OFF, SW7=2 6.5 11.0 mA
Comparator input H V
IH TP8 SW6=2, TP5=H L 5.8 6.0 6.2 V
voltage L V
IL TP8 SW6=2, TP5=L H 3.6 3.8 4.0 V
Comparator output H V
OH TP5 SW6=2, TP8=3.0V 8.1 8.9 V
voltage L V
OL TP5 SW6=2, TP8=6.5V 0 0.1 V
Free-running frequency
PAL fOP TP1 500 kHz
NTSC f
ON TP1 SW3=SW4=2 503 kHz
Oscillation output voltage V
O TP1 1.9 VP-P
Sync discrimination input level VIN TP2 SW2=2, TP5=H L
-
12 dB
Sync separation working current
IIN TP4 SW5=2, TP5=L H 100 125 150 µA
Sync discrimination voltage
V8
H TP8 SW2=2, TP2=0dB 7.2 V
V8
L TP8 SW2=2, TP2=
-
20dB 0 V
Capture range
PAL f
CP TP3
SW2=3, SW4=1, TP5=H L *1
150 200 Hz
NTSC f
CN TP3
SW2=3, SW4=2, TP5=H L *1
150 200 Hz
Pin 7 output voltage
H V7
H TP7
SW2=2
*
2
0.87 0.90 0.93 V
L V7
L TP7 0.20 0.40 V
Pin 6 voltage V6 TP6 SW5=3 6.7 V
Note : *1
Capture range : fcp, fcn
The smaller of fc1 and fc2 values are fcp and fcn.
Note :
*
2
fc1 fc2
fOP,fON
f
TP7
GND
V
7H
V7L
MITSUMI
Sync Detector MM1021
Measuring Circuit
Application Circuits
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