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| MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) Monolithic IC MM1221~MM1228 Outline These ICs are high grade video switches with 2-input 1-output or 3-input 1-output and built-in 75 driver. The series includes those with and without built-in clamp and 6dB amp circuits. Circuit configuration tables and block diagrams are as follows. MM1228 is used as the representative model in this description. MM1221~MM1228 Series Circuit Configuration Table Model name MM1221 MM1222 MM1223 MM1224 MM1225 MM1226 MM1227 MM1228 # of Inputs 2 2 3 3 2 2 3 3 # of Outputs 1 1 1 1 1 1 1 1 6dB amp circuit No Yes No Yes No Yes No Yes Clamp circuit No No No No Yes Yes Yes Yes Power supply voltage range 8~13V 8~13V 8~13V 8~13V 4.7~13V 4.7~13V 4.7~13V 4.7~13V MM1221~MM1228 Input/Output Voltage Measurement Values (typ.) Model name Power supply voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage Input voltage Output voltage 1.27 1.31 1.3 1.4 1.27 1.31 1.3 1.4 5V 9V 4.53 4.5 4.05 5.34 4.53 4.5 4.05 5.34 2.17 2.25 2.2 2.23 2.17 2.25 2.2 2.23 12V 6.05 6.1 5.4 7.12 6.05 6.1 5.4 7.12 2.86 2.96 2.9 2.88 2.86 2.96 2.9 2.88 Unit V V V V V V V V V V V V V V V V MM1221 MM1222 MM1223 MM1224 MM1225 MM1226 MM1227 MM1228 MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Block Diagram (MM1221~MM1228) Control input truth table SW L H OUT IN1 IN2 Control input truth table SW L H OUT IN1 IN2 Control input truth table SW1 L H L/H SW2 L L H OUT IN1 IN2 IN3 SW1 L H L/H Control input truth table SW2 L L H OUT IN1 IN2 IN3 MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Control input truth table SW L H OUT IN1 IN2 Control input truth table SW L H OUT IN1 IN2 Control input truth table SW1 L H L/H SW2 L L H OUT IN1 IN2 IN3 SW1 L H L/H Control input truth table SW2 L L H OUT IN1 IN2 IN3 MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Introduction of Main Model 3-Input 1-Output Video Switch (with 75 driver, clamp and 6dB amp) Monolithic IC MM1228 Outline This is a high performance 3-input 1-output video switch IC with 6dB amp, clamp and 75 driver circuits. Output is 75, and a 1VP-P video signal can be output externally. Features 1. 2. 3. 4. 5. 6. 7. 8. 9. Built-in 75 driver circuit Built-in 6dB amp Built-in clamp circuit Models in the MM1221~MM1228 series without clamp circuits able to support audio or chroma circuits Mute operation possible Wide operating power supply voltage range 4.7~13V Low current consumption Wideband frequency response 7MHz @ 0dB Crosstalk -70dB (4.43MHz) Package SOP-8C (MM1228XF) SIP-8A (MM1228XS) Applications 1. 2. 3. 4. TV VCR Video cameras Other video equipment Block Diagram Control input truth table SW1 L H L/H SW2 L L H OUT IN1 IN2 IN3 MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Pin Description Pin no. 1 3 5 Pin name IN1 IN2 IN3 Function Input Internal equivalent circuit diagram 2 4 SW1 SW2 Switch 7 OUT Output 6 8 VCC GND Power supply Ground MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Measuring Circuit Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC Pd Ratings -40~+125 -20~+75 15 300 Units C C V mW Electrical Characteristics Item (Except where noted otherwise, Ta=25C, VCC=5.0V) Symbol VCC Id GV FC DG DP Voff CT VIH1 VIL1 VIH2 VIL2 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 2.1 0.7 2.1 0.7 -64 +5.5 -1 Measurement conditions Min. Typ. Max. Units 4.7 8.4 +6.0 0 0 0 13.0 10.9 +6.5 +1 3 3 30 -54 V mA dB dB % deg mV dB V V V V Operating power supply voltage range Consumption current Voltage gain Frequency characteristic Differential gain Differential phase Output offset voltage Crosstalk SW1 input voltage H SW1 input voltage L SW2 input voltage H SW2 input voltage L MITSUMI 2-Input 1-Output Video Switch (75 driver)/3-Input 1-Output Video Switch (75 driver) MM1221~1228 Measuring Procedures Item Consumption current Symbol Id (VCC=5.0V, VC1=VCC, VC2=0V) Switch state S1 S2 S3 S4 2 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 2 2 2 1 1 1 2 2 2 2 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 2 2 2 2 2 1 1 1 2 2 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2 2 2 2 2 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 1 2 1 2 2 1 2 1 1 S5 2 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2 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 7MHz 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 TP4. APL=10~90% Voltage gain Gv Frequency characteristic FC Differential gain DG Differential phase DP Proceed as for DG, and measure differential phase. Output offset voltage Voff Measure the DC voltage difference of each switch status at TP2. Crosstalk CT Assume VC1=2.1V, VC2=0.7V. Input a 1.0VP-P, 4.43MHz sine wave to SG, and given TP1 voltage as V4 and TP3 voltage as V5, CT is obtained from the following formula. CT=20LOG (V5/V4) dB Switch 1 input voltage H Switch 1 input voltage L Switch 2 input voltage H Switch 2 input voltage L VIH1 VIL1 2 VIH2 2 2 2 1 Impress an optional DC voltage on TP7 and TP8. Gradually raise from VC1=0V. TP5 voltage when TP8 voltage is output on TP2 is VIH1. Gradually lower from VC1=VCC. TP5 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. TP6 voltage when TP7 voltage is output on TP2 is VIL2. VIL2 |
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