3-Input 1-Output Video Switch (with Y-C mix) MM1188 MITSUMI 3-Input 1-Output Video Switch (with Y-C mix) Monolithic IC MM1188 Outline This is a 3-input, 1-output video switch IC for video signal switching. Of the 3 inputs, one has an input pin that supports S input, and there is a built-in mixing circuit. Features 1. 2. 3. 4. 5. 6. 7. 8. Built-in mixing circuit and input pin for S input Built-in 6dB amp Clamp function Mute function Current consumption Operating power supply voltage range Frequency response Crosstalk (IN1-Y, IN2, IN3) 12.5mA typ. 8~13V 10MHz 70dB (at 4.43MHz) Package SIP-9B (MM1188XS) Applications 1. TV 2. VCR, etc. Block Diagram Control input truth table SW1 L H - SW2 L L H OUT IN1 IN2 IN3 3-Input 1-Output Video Switch (with Y-C mix) MM1188 MITSUMI Pin Description Pin no. Pin name Function 1 IN3 Input 3 9 IN2 Input 2 2 VCC Power supply 3 SW1 Switch 1 8 SW2 Switch 2 4 OUT Output 5 GND Ground 6 IN1-Y Input 1 (luminance signal or composite signal) Internal equivalent circuit diagram 3-Input 1-Output Video Switch (with Y-C mix) MM1188 MITSUMI 7 IN1-C Input 1 (chroma signal) 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 15 V Allowable loss Pd 1100 mW Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC=12.0V) Item Operating power supply voltage range Consumption current Voltage gain Frequency characteristic Differential gain Differential phase Output offset voltage Crosstalk Switch 1 input voltage H Switch 1 input voltage L Switch 2 input voltage H Switch 2 input voltage L A IN1-C input dynamic range B Symbol VCC Id GV FC DG DP Voff CT VIH1 VIL1 VIH2 VIL2 DRA DRB Measurement conditions Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit IN1-Y, IN2, IN3 input dynamic range DRC Refer to Measuring Circuit IN1-C input impedance IN1-C pin voltage IN1-Y pin voltage IN2 pin voltage IN3 pin voltage Out pin voltage Ri VI1C VI1Y VI2 VI3 Vo S1~S6=2 S1~S6=2 S1~S4=S6=2, S5=1 S1~S5=2, S6=1 S1~S6=2 Min. Typ. Max. 8.0 13.0 8.8 12.5 16.5 5.5 6.0 6.5 -1 0 +1 0 ±3 0 ±3 ±60 -70 -60 2.3 0.9 2.3 0.9 1.0 1.2 1.5 4.0 4.1 4.1 4.1 3.5 Units V mA dB dB % deg mV dB V V V V VP-P VP-P VP-P 15 4.5 4.6 4.6 4.6 4.0 5.0 5.1 5.1 5.1 4.5 kΩ V V V V V 3-Input 1-Output Video Switch (with Y-C mix) MM1188 MITSUMI Measuring Procedures Item Symbol Consumption current Id Voltage gain Frequency characteristic Differential gain GV FC DG Differential phase DP Output offset voltage Voff CT Crosstalk Switch 1 input voltage H VIH1 Switch 1 input voltage L VIL1 Switch 2 input voltage H VIH2 Switch 2 input voltage L VIL2 A (Except where noted otherwise, VCC=12.0V, VC1=VCC, VC2=0V) Switch state S3 S4 S5 2 2 2 S1 2 S2 2 S6 2 1 2 2 2 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 2 2 2 2 2 2 1 1 1 2 2 2 2 2 2 2 2 1 2 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 2 2 2 2 2 2 2 2 1 1 1 2 2 2 2 2 2 1 1 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 1 1 2 2 2 1 1 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 1 2 1 1 2 1 2 2 1 2 1 1 2 2 2 1 1 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 2 1 1 2 1 1 2 1 1 2 2 2 2 2 2 2 2 1 3 1 2 2 2 2 3 1 2 2 2 2 2 2 2 1 2 2 2 1 2 2 2 1 2 1 1 2 2 1 DRA IN1-C input dynamic range B DRB IN1-Y, IN2, IN3 input dynamic range DRC Measuring Procedure Connect a DC ammeter to the VCC pin and measure. The ammeter is shorted for use in subsequent measurements. Input a 1.0VP-P, 100kHz sine wave to SG, and obtain Gv from the following formula given TP1 voltage as V1 and TP3 voltage as V2. GV=20LOG (V2/V1) dB For the above GV measurement, given TP3 voltage for 10MHz as V3, FC is obtained from the following formula. FC=20LOG (V3/V2) dB Input a 1.0VP-P staircase wave to SG, and measure differential gain at TP3. 1 * APL=10~90% Proceed as for DG, and measure differential phase. 2 * Measure the DC voltage difference of each switch status at TP2. Assume VC1=2.3V, VC2=0.9V. Input a 1.0VP-P, 4.43MHz sine wave to SG, and given TP3 voltage during signal output as V4, switch S5 and S6, and given TP3 voltage for output OFF as V5, CT is obtained from the following formula. CT=20LOG (V5/V4) dB Impress an optional DC voltage on TP7 and TP8. Gradually raise from VC1=0V. TP4 voltage when TP8 voltage is output on TP2 is VIH1. Gradually lower from VC1=VCC. TP4 voltage when TP7 voltage is output on TP2 is VIL1. Impress an optional DC voltage on TP7 and TP9. Gradually raise from VC1=0V. TP5 voltage when TP9 voltage is output on TP2 is VIH2. Gradually lower from VC1=VCC. TP5 voltage when TP7 voltage is output on TP2 is VIL2. Input a luminance signal as shown in Figure 1 to SG1, and a chroma signal as shown in Figure 2 to SG2. Change the chroma signal amplitude and measure the maximum amplitude where there is no waveform distortion at TP3 and convert to input amplitude. Input a luminance signal as shown in Figure 3 to SG1, and a chroma signal as shown in Figure 2 to SG2. Change the chroma signal amplitude and measure the maximum amplitude where there is no waveform distortion at TP3 and convert to input amplitude. Input a sine wave to SG1. Measure the maximum amplitude where there is no waveform distortion at TP3 and convert to input amplitude. 3-Input 1-Output Video Switch (with Y-C mix) MM1188 MITSUMI Note : 1 * *2 Measurement of IN1-C and IN1-Y mixed differential gain and differential phase is as follows. Switch status : S1=3, S2=1, S3=S4=S5=S6=2 Measuring procedure : Input a 1.0VP-P staircase wave signal (without chroma signal) to SG1, and a chroma signal to SG2. Measure TP3 differential gain and differential phase. Sync signal 0.286VP-P (40IRE) Figure 1 Luminance signal 0.714VP-P (100IRE) Sync signal 0.286VP-P (40IRE) Figure 3 Measuring Circuit Chroma signal variable amplitude Figure 2 1.0VP-P (140IRE)