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 No-adjustment Sync Separator MM1108 MITSUMI Pin Description Pin no. Pin name Internal equivalent circuit diagram Function 1 VCC Power supply voltage pin. Impresses 5V. 2 SC 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 GND GND 6 VIN 7 V.SYNC Signal input pin Inputs video signal. 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. No-adjustment Sync Separator MM1108 MITSUMI Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C Power supply voltage VCC max. 7 V Allowable loss Pd 300 mW * * Package : SOP-8C Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC=5.0V, SW1=a, SW2=a) Measurement Item Symbol Operating power supply voltage VCC VCC Consumption current Id Id SW1 : b ISEPA IIN SW1 : c, VR1 : H fO TP1 fCAP TP1 H. sync pulse width tW1 TP1 VIN : signal 1, 15.73kHz H. sync delay time td1 TP1 VIN : signal 1, 15.73kHz H. sync output voltage L VL1 TP1 VIN : signal 1 ,15.73kHz H. sync output voltage H VH1 TP1 VIN : signal 1, 15.73kHz V. sync pulse width tW2 TP2 VIN : staircase wave 1VP-P V. sync delay time td2 TP2 VIN : staircase wave 1VP-P V. sync output voltage L VL2 TP2 VIN : staircase wave 1VP-P V. sync output voltage H VH2 TP2 VIN : staircase wave 1VP-P Minimum sync separation operating current Free-running frequency Horizontal sync signal acquisition range circuit Measurement conditions Min. Typ. Max. Units 4.5 L *1 SW1 : b 5.5 V 4.4 7.0 mA 30 60 uA 14.7 15.7 16.7 kHz VIN : signal 1, 15.73kHz SW2 : b 15 5.0 *2 *3 *4 *4 *4 *4 *5 *5 *5 *5 2.1 2.7 kHz 4.3 4.7 5.1 uS -0.3 0.2 0.7 uS 0.2 0.4 V 4.8 5.0 140 200 260 uS 6.0 10.0 20.0 uS 0.2 V 4.8 V 0.4 5.0 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 TP1 waveform VL1 td1 *5 V. SYNC measurement Input video signal (Horizontal sync signal portion) tw2 TP2 waveform VH2 V L2 td 2 Measuring Circuit MITSUMI Application Circuits Application Circuit 1 Application Circuit 2 No-adjustment Sync Separator MM1108