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 4fsc Clock Generator MM1093 MITSUMI Pin Description Pin no. Pin name Equivalent Circuit Diagram Pin Description 1 Chroma input 2 ACC filter ACC filter pin 3 APC1 filter fsc APC circuit filter pin 4 X'tal 5 GND1 fsc GND pin 6 GND2 4fsc GND pin 7 fsc output Chroma signal input pin VCXO circuit X'tal pin Outputs subcarrier synchronized to input chroma signal NTSC : 3.579545MHz PAL : 4.433619MHz 4fsc Clock Generator MM1093 MITSUMI 8 NC 9 Oscillator R 10 VCC1 11 12 VCC2 Oscillator C 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. NC pin Connects to resistor that determines 4fsc VCO free run frequency fsc power supply pin 4fsc Clock Generator MM1093 MITSUMI 15 Burst gate filter This pin creates burst gate pulse. 16 Composite input Composite signal input pin 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 350 mW 4fsc Clock Generator MM1093 MITSUMI Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC=5.0V, SG1, SG2 : no signal, SW1 : A) Item Symbol Operating power supply voltage Consumption current Sync separation circuit VCC ICC Measurement circuit VCC - Sync separation level VS TP3 Measurement conditions SG2 : 1VP-P staircase wave 1 SG1 : separate chroma signal SW1 : B 5 * Min. Typ. Max. Units 4.7 5.0 24 5.3 32 V mA 40 80 120 mV * PLL circuit ACC input amplitude range APC1 frequency acquisition range VCO1 free run frequency deviation TP1 VIN fC f0 fSC output level VO1 fSC output duty DO1 TP2 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 * * * * * * 4fSC circuit VO2 4fSC output level 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 5 560 mVP-P Hz 250 Hz 1.2 VP-P 55 % 0.8 1.0 1.2 VP-P 45 50 55 % * 4fSC output DT DO2 TP3 * fSC leakage Lfsc 50 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 amplitude range *2 Defined as separate chroma signal burst signal amplitude that can be input to chroma input. *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. * * 4fsc Clock Generator MM1093 MITSUMI 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 3.3kΩ or higher. * * * * 4fsc Clock Generator MM1093 MITSUMI 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 3.3kΩ or higher. 5 BPF Reference circuit * * * * *