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| MITSUMI 4fsc Clock Generator MM1093 4fsc Clock Generator Monolithic IC MM1093 Outline This IC generates a clock used for driving the CCD that configures a comb filter for Y/C separation, or for sampling A/D and D/A converters that configure a digital comb filter. It has a built-in subcarrier oscillator (3.58MHz or 4.43MHz) synchronized to the input chroma signal, and a clock oscillator that is 4 times the latter. MM1093ND and NF are available for NTSC format, and MM1093PD and PF for PAL format. Features 1. Built-in fsc synchronized to input chroma signal and 4fsc oscillators 2. Reduced number of external parts due to 1 pin VCXO 3. +5V single power supply Package SOP-16A (MM1093NF, MM1093PF) DIP-16B (MM1093ND, MM1093PD) Applications 1. TV 2. VCR Equivalent Circuit Diagram MITSUMI 4fsc Clock Generator MM1093 Pin Description Pin no. 1 Pin name Chroma input Equivalent Circuit Diagram Pin Description Chroma signal input pin 2 ACC filter ACC filter pin 3 APC1 filter fsc APC circuit filter pin 4 X'tal VCXO circuit X'tal pin 5 6 7 GND1 GND2 fsc output fsc GND pin 4fsc GND pin Outputs subcarrier synchronized to input chroma signal NTSC : 3.579545MHz PAL : 4.433619MHz MITSUMI 4fsc Clock Generator MM1093 8 9 NC Oscillator R NC pin Connects to resistor that determines 4fsc VCO free run frequency 10 11 12 VCC1 VCC2 Oscillator C fsc power supply pin 4fsc power supply in Connects to capacitor that determines 4fsc VCO free run frequency 13 APC2 filter 4fsc APC circuit filter pin 14 4fsc output Outputs a 4 signal sychronized to input chroma signal. MITSUMI 4fsc Clock Generator MM1093 15 Burst gate filter This pin creates burst gate pulse. 16 Composite input Composite signal input pin 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 7 350 Units C C V mW MITSUMI 4fsc Clock Generator MM1093 Electrical Characteristics Item Operating power supply voltage Consumption current Sync separation circuit Sync separation level PLL circuit ACC input amplitude range APC1 frequency acquisition range VCO1 free run frequency deviation fSC output level fSC output duty 4fSC circuit 4fSC output level VO2 VCC ICC VS VIN fC f0 VO1 (Except where noted otherwise, Ta=25C, VCC=5.0V, SG1, SG2 : no signal, SW1 : A) Measurement circuit VCC TP3 TP1 Measurement conditions Min. Typ. Max. Units 4.7 SG2 : 1VP-P staircase wave 1 SG1 : separate chroma signal SW1 : B 5 5.0 24 80 5.3 32 120 V mA mV Symbol * 40 * TP2 DO1 SG1 : separate chroma signal 2 5 15 SG1 : sine wave 143mVP-P 400 SG2 : 1VP-P staircase wave 3 4 -250 0 SG1 : separate chroma signal 0.8 1.0 SG2 : 1VP-P staircase wave 5 SG1 : separate chroma signal 45 50 SG2 : 1VP-P staircase wave 5 * ** * * * 560 mVP-P Hz 250 1.2 55 Hz VP-P % 4fSC output DT DO2 Lfsc TP3 fSC leakage SG1 : separate chroma signal SG2 : 1VP-P staircase wave SW1 : B 5 SG1 : separate chroma signal SG2 : 1VP-P staircase wave SW1 : B 5 SG1 : separate chroma signal SG2 : 1VP-P staircase wave SW1 : B 5 0.8 45 1.0 50 50 1.2 55 VP-P % dB * * * Notes: 1 Sync separation level Measure the level where SG1 input signal and TP3 output signal synchronize when 1VP-P staircase wave sync signal level is raised from 0V. * SG2 : 1VP-P staircase wave 1VP-P VS Hsync ACC input range *2 Defined as amplitudechroma signal burst signal amplitude that can be input to chroma input. separate *3 APC1 frequency pull-in range * * Defined as the smaller of the differences when input signal frequency is changed from high to fO and from low to fo when TP2 output is not synchronized to SG1 input signal and when it is synchronized. 4 VCO1 free run frequency deviation Defined as the difference between TP2 output signal frequency and fO. 5 The standard for the separate chroma signal is burst signal 143mVP-P. MITSUMI 4fsc Clock Generator MM1093 Measuring Circuit Notes: 1 NTSC : R=5.6k PAL : 4.3k 2 Recommended crystal oscillator Tokyo Dempa, TR-49 or equivalent NTSC : 3.579545MHz PAL : 4.433619MHz 3 Use part with precision within 5% and temperature characteristic CH. 4 R and C change according to board floating capacitance, etc. Select R and C so that Pin 13 voltage is approximately 2V for VCO lock. Also, C should be 4PF or higher, and R should be 3.3k or higher. * * * * MITSUMI 4fsc Clock Generator MM1093 Application Circuits Notes: 1 NTSC : R=5.6k PAL : R=4.3k 2 Recommended crystal oscillator Tokyo Dempa, TR-49 or equivalent NTSC : 3.579545MHz PAL : 4.433619MHz 3 Use part with precision within 5% and temperature characteristic CH. 4 R and C change according to board floating capacitance, etc. Select R and C so that Pin 13 voltage is approximately 2V for VCO lock. Also, C should be 4PF or higher, and R should be 3.3k or higher. 5 BPF Reference circuit * * * * * |
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