MM1188

MITSUMI 3-Input 1-Output Video Switch (with Y-C mix) MM1188 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 MITSUMI 3-Input 1-Output Video Switch (with Y-C mix) MM1188 Pin Description Pin no. 1 9 Pin name IN3 IN2 Function Input 3 Input 2 Internal equivalent circuit diagram 2 3 8 VCC SW1 SW2 Power supply Switch 1 Switch 2 4 OUT Output 5 6 GND IN1-Y Ground Input 1 (luminance signal or composite signal) MITSUMI 3-Input 1-Output Video Switch (with Y-C mix) MM1188 7 IN1-C Input 1 (chroma signal) Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25°C) Symbol TSTG TOPR VCC Pd Ratings -40~+125 -20~+75 15 1100 Units °C °C V 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 IN1-Y, IN2, IN3 input dynamic range IN1-C input impedance IN1-C pin voltage IN1-Y pin voltage IN2 pin voltage IN3 pin voltage Out pin voltage Symbol VCC Id GV FC DG DP Voff CT VIH1 VIL1 VIH2 VIL2 DRA DRB DRC Ri VI1C VI1Y VI2 VI3 Vo 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 Refer to Measuring Circuit 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 15 4.5 4.6 4.6 4.6 4.0 Units V mA dB dB % deg mV dB V V V V VP-P VP-P VP-P kΩ V V V V V S1~S6=2 S1~S6=2 S1~S4=S6=2, S5=1 S1~S5=2, S6=1 S1~S6=2 4.0 4.1 4.1 4.1 3.5 5.0 5.1 5.1 5.1 4.5 MITSUMI 3-Input 1-Output Video Switch (with Y-C mix) MM1188 Measuring Procedures Item Consumption current Symbol Id S1 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 (Except where noted otherwise, VCC=12.0V, VC1=VCC, VC2=0V) S2 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 Switch state S3 S4 S5 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 S6 2 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 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 Voltage gain GV Frequency characteristic FC Differential gain DG * APL=10~90% Proceed as for DG, and measure differential phase. 2 Differential phase DP * Output offset voltage Voff Measure the DC voltage difference of each switch status at TP2. Crosstalk CT 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. Switch 1 input voltage H Switch 1 input voltage L Switch 2 input voltage H Switch 2 input voltage L VIH1 VIL1 2 VIH2 VIL2 3 1 2 2 2 2 2 2 2 2 1 A IN1-C input dynamic range B DRA 3 DRB 2 2 2 1 2 2 2 2 IN1-Y, IN2, IN3 input dynamic range DRC 1 2 2 2 1 2 2 2 1 2 1 1 2 2 1 MITSUMI Note : 1 3-Input 1-Output Video Switch (with Y-C mix) MM1188 * *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) Chroma signal variable amplitude Figure 1 Figure 2 Luminance signal 0.714VP-P (100IRE) Sync signal 1.0VP-P (140IRE) 0.286VP-P (40IRE) Figure 3 Measuring Circuit