MM1108XS [MITSUMI]
Monolithic IC; 单片IC
| 型号： | MM1108XS |
| 厂家： | 
MITSUMI ELECTRONICS, CORP. |
| 描述： | Monolithic IC |
| 文件： | 总5页 (文件大小：127K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
No-adjustment Sync Separator MM1108
MITSUMI
No-adjustment Sync Separator
Monolithic IC MM1108
Outline
This IC is a no-adjustment sync separator IC designed for use in VCR, TV and other video equipment.
Features
1. Low current consumption
2. Open collector output
4.4mA typ.
3. Built-in 3V regulator handles power supply ripple
4. Built-in capacitor for vertical sync separation
5. Time from vertical signal to H. SYNC output re-sync reduced (relative to LVA519)
6. Supports both PAL and NTSC formats
7. Sync separation level can be adjusted with external constants
Package
SOP-8C (MM1108XF)
SIP-8A (MM1108XS)
DIP-8B (MM1108XD)
Applications
1. TV
2. VCR
3. VCR with camera
Block Diagram
No-adjustment Sync Separator MM1108
MITSUMI
Pin Description
Pin no.
Pin name
Internal equivalent circuit diagram
Function
Power supply voltage pin. Impresses 5V.
1
2
VCC
VCO integration pin
SC
Free run frequency determined by external
capacitor between Pin 2 and GND, and
external resistor between Pin 3 and GND.
VCO input pin
Pin 4 output is input via external loop filter.
3
4
VCO
LPF
Phase comparator output pin.
GND
5
6
GND
Signal input pin
VIN
Inputs video signal.
V. SYNC output pin
Outputs vertical sync signal separated from
input video signal.
7
8
V.SYNC
H.SYNC
H. SYNC output pin
Outputs horizontal sync signal synchronized
to input video signal, except for vertical
feedback interval. For no signal, outputs
free run frequency horizontal sync signal.
No-adjustment Sync Separator MM1108
MITSUMI
(Ta=25°C)
Absolute Maximum Ratings
Item
Symbol
Ratings
-40~+125
Units
°C
Storage temperature
Operating temperature
Power supply voltage
Allowable loss
TSTG
TOPR
-20~+75
°C
VCC max.
Pd
7
V
300
mW
*
Package : SOP-8C
*
(Except where noted otherwise, Ta=25°C, VCC=5.0V, SW1=a, SW2=a)
Electrical Characteristics
Measurement
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
circuit
VCC
Operating power supply voltage VCC
4.5 5.0 5.5
V
Consumption current
Minimum sync separation
operating current
Id
ISEPA
fO
Id
SW1 : b
4.4 7.0 mA
IIN
SW1 : c, VR1 : H
SW1 : b
L
1
15
14.7 15.7 16.7 kHz
2.1 2.7 kHz
30
60 uA
*
Free-running frequency
Horizontal sync signal
acquisition range
TP1
TP1
VIN : signal 1, 15.73kHz
fCAP
SW2 : b
*2 *3
H. sync pulse width
tW1
td1
TP1
TP1
TP1
TP1
TP2
TP2
TP2
TP2
VIN : signal 1, 15.73kHz
4
4
4
4
4.3 4.7 5.1 uS
-0.3 0.2 0.7 uS
*
H. sync delay time
VIN : signal 1, 15.73kHz
VIN : signal 1 ,15.73kHz
VIN : signal 1, 15.73kHz
*
*
*
H. sync output voltage L
H. sync output voltage H
V. sync pulse width
VL1
VH1
tW2
td2
0.2 0.4
4.8 5.0
V
V
VIN : staircase wave 1VP
VIN : staircase wave 1VP
VIN : staircase wave 1VP
VIN : staircase wave 1VP
-
-
-
-
P
P
P
P
5
140 200 260 uS
6.0 10.0 20.0 uS
*
*
*
*
V. sync delay time
5
5
5
V. sync output voltage L
V. sync output voltage H
VL2
VH2
0.2 0.4
4.8 5.0
V
V
Notes :
1 Minimum sync separation operating current measurement
*
*
Given SW1 : c, change VR1 from high to low, and measure current flowing on IIN when TP2
output switches from high to low.
2 Signal 1 : Rectangular wave signal with 0.3V amplitude and pulse width 4.7µS
Signal 1 waveform
4.7uS
3 Measuring horizontal sync signal pull-in range
*
Given SW1 : a and SW2 : b, with TP1 waveform not synchronized to signal 1, adjust VR2 so that
they are synchronized. Next, switch SW1 to b, and measure TP1 output free run frequency. The
horizontal signal pull-in range is the smaller of the measured value and the difference from
15.73kHz.
No-adjustment Sync Separator MM1108
MITSUMI
4
H. SYNC measurement
*
Signal 1
tw1
VH1
VL1
TP1 waveform
td1
5
V. SYNC measurement
Input video signal
*
(Horizontal sync
signal portion)
VH2
VL2
tw2
TP2 waveform
td2
Measuring Circuit
No-adjustment Sync Separator MM1108
MITSUMI
Application Circuits
Application Circuit 1
Application Circuit 2
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