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| MITSUMI No-adjustment Sync Separator MM1108 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. 2. 3. 4. 5. 6. 7. Low current consumption 4.4mA typ. Open collector output Built-in 3V regulator handles power supply ripple Built-in capacitor for vertical sync separation Time from vertical signal to H. SYNC output re-sync reduced (relative to LVA519) Supports both PAL and NTSC formats 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 MITSUMI No-adjustment Sync Separator MM1108 Pin Description Pin no. 1 2 Pin name VCC SC Internal equivalent circuit diagram Function Power supply voltage pin. Impresses 5V. VCO integration pin Free run frequency determined by external capacitor between Pin 2 and GND, and external resistor between Pin 3 and GND. 3 VCO VCO input pin Pin 4 output is input via external loop filter. 4 LPF Phase comparator output pin. 5 6 GND VIN GND Signal input pin Inputs video signal. 7 V.SYNC V. SYNC output pin Outputs vertical sync signal separated from input video signal. 8 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. MITSUMI No-adjustment Sync Separator MM1108 Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC max. Pd Ratings -40~+125 -20~+75 7 300 Units C C V mW * * Package : SOP-8C Electrical Characteristics Item Operating power supply voltage Consumption current Minimum sync separation operating current Free-running frequency Horizontal sync signal acquisition range H. sync pulse width H. sync delay time H. sync output voltage L H. sync output voltage H V. sync pulse width V. sync delay time V. sync output voltage L V. sync output voltage H Notes : (Except where noted otherwise, Ta=25C, VCC=5.0V, SW1=a, SW2=a) Measurement circuit VCC Id IIN TP1 TP1 TP1 TP1 TP1 TP1 TP2 TP2 TP2 TP2 SW1 : b SW1 : c, VR1 : H SW1 : b VIN : signal 1, 15.73kHz SW2 : b L Symbol VCC Id ISEPA fO fCAP tW1 td1 VL1 VH1 tW2 td2 VL2 VH2 Measurement conditions Min. Typ. Max. Units 4.5 5.0 4.4 5.5 7.0 60 V mA uA *1 15 30 14.7 15.7 16.7 kHz 2.1 4.3 -0.3 4.8 140 6.0 4.8 2.7 4.7 0.2 0.2 5.0 200 0.2 5.0 260 0.4 10.0 20.0 5.1 0.7 0.4 kHz uS uS V V uS uS V V *2 *3 *4 VIN : signal 1, 15.73kHz *4 VIN : signal 1 ,15.73kHz *4 VIN : signal 1, 15.73kHz *4 VIN : staircase wave 1VP-P *5 VIN : staircase wave 1VP-P *5 VIN : staircase wave 1VP-P *5 VIN : staircase wave 1VP-P *5 VIN : signal 1, 15.73kHz *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 4.7S 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. MITSUMI No-adjustment Sync Separator MM1108 *4 H. SYNC measurement Signal 1 tw1 TP1 waveform VL1 td1 VH1 *5 V. SYNC measurement Input video signal (Horizontal sync signal portion) TP2 waveform tw2 VH2 VL2 td2 Measuring Circuit MITSUMI No-adjustment Sync Separator MM1108 Application Circuits Application Circuit 1 Application Circuit 2 |
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