2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 MITSUMI 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω 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 75Ω 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 # of Inputs # of Outputs 6dB amp circuit Clamp circuit Power supply voltage range MM1221 2 1 No No 8~13V MM1222 2 1 Yes No 8~13V MM1223 3 1 No No 8~13V MM1224 3 1 Yes No 8~13V MM1225 2 1 No Yes 4.7~13V MM1226 2 1 Yes Yes 4.7~13V MM1227 3 1 No Yes 4.7~13V MM1228 3 1 Yes Yes 4.7~13V MM1221~MM1228 Input/Output Voltage Measurement Values (typ.) Model name MM1221 MM1222 MM1223 MM1224 MM1225 MM1226 MM1227 MM1228 Power supply 9V 12V Unit Input voltage 4.53 6.05 V Output voltage 4.5 6.1 V Input voltage 4.05 5.4 V Output voltage 5.34 7.12 V Input voltage 4.53 6.05 V Output voltage 4.5 6.1 V Input voltage 4.05 5.4 V Output voltage 5.34 7.12 V voltage 5V Input voltage 1.27 2.17 2.86 V Output voltage 1.31 2.25 2.96 V Input voltage 1.3 2.2 2.9 V Output voltage 1.4 2.23 2.88 V Input voltage 1.27 2.17 2.86 V Output voltage 1.31 2.25 2.96 V Input voltage 1.3 2.2 2.9 V Output voltage 1.4 2.23 2.88 V 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 MITSUMI Block Diagram (MM1221~MM1228) Control input truth table SW L H Control input truth table OUT IN1 IN2 SW L H Control input truth table SW1 L H L/H SW2 L L H OUT IN1 IN2 Control input truth table OUT IN1 IN2 IN3 SW1 L H L/H SW2 L L H OUT IN1 IN2 IN3 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 MITSUMI Control input truth table SW L H Control input truth table OUT IN1 IN2 SW L H Control input truth table SW1 L H L/H SW2 L L H OUT IN1 IN2 Control input truth table OUT IN1 IN2 IN3 SW1 L H L/H SW2 L L H OUT IN1 IN2 IN3 MITSUMI 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 Introduction of Main Model 3-Input 1-Output Video Switch (with 75Ω 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 75Ω driver circuits. Output is 75Ω, and a 1VP-P video signal can be output externally. Features 1. 2. 3. 4. 5. 6. 7. 8. 9. Built-in 75Ω 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 SW2 OUT L L IN1 H L IN2 L/H H IN3 MITSUMI 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 Pin Description Pin no. Pin name Function 1 IN1 Input 3 IN2 5 IN3 2 SW1 4 SW2 7 OUT Output 6 VCC Power supply 8 GND Ground Switch Internal equivalent circuit diagram MITSUMI 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 Measuring Circuit 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 300 mW Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC=5.0V) Item Symbol Measurement conditions Operating power supply voltage range VCC Consumption current Id Refer to Measuring Circuit Voltage gain GV Refer to Measuring Circuit Frequency characteristic FC Refer to Measuring Circuit Differential gain DG Differential phase Min. Typ. Max. Units 4.7 13.0 V 8.4 10.9 mA +5.5 +6.0 +6.5 dB -1 0 +1 dB Refer to Measuring Circuit 0 ±3 % DP Refer to Measuring Circuit 0 ±3 deg Output offset voltage Voff Refer to Measuring Circuit ±30 mV Crosstalk CT Refer to Measuring Circuit -54 dB SW1 input voltage H VIH1 Refer to Measuring Circuit SW1 input voltage L VIL1 Refer to Measuring Circuit SW2 input voltage H VIH2 Refer to Measuring Circuit SW2 input voltage L VIL2 Refer to Measuring Circuit -64 2.1 V 0.7 2.1 V V 0.7 V MITSUMI 2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228 Measuring Procedures Item Symbol Consumption current Id Voltage gain Gv Frequency characteristic FC Differential gain DG Differential phase DP Output offset voltage Voff Crosstalk CT Switch 1 input voltage H VIH1 Switch 1 input voltage L VIL1 Switch 2 input voltage H VIH2 Switch 2 input voltage L VIL2 (VCC=5.0V, VC1=VCC, VC2=0V) Switch state S1 S2 S3 S4 2 2 2 2 S5 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 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 2 2 2 2 1 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% Proceed as for DG, and measure differential phase. Measure the DC voltage difference of each switch status at TP2. 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 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.