3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI 3-Input 2-Output 3-Circuit Video Switch Monolithic IC MM1238 July 5, 1993 Outline This IC is a video switch IC developed for high-end large/medium TVs incorporating three 3-input 2-output circuits. It is ideal for switching BS/JSB/CS or M-N converters (mute to NTSC conversion). The BS-CS decoder can be used as a W decoder. Features 1. One of the two video signal outputs is used for external output, and has a 6dB amp, 75Ω, 1VP-P 2. Input impedance 1~3 video circuits 15kΩ 1~3 audio circuits 68kΩ 3. Crosstalk Video -60dB (at 4.43MHz) Audio -80dB (at 1kHz) Video : Audio -70dB (at 100kHz) 4. Frequency response 10MHz (6dB, 75Ω, amp only, 7MHz) 5. Supply voltage 8.0~13.0V Package SDIP-22A (MM1238XD) Applications 1. TV 2. Free-standing VCR 3. Other video equipment Pin Assignment 22 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 SDIP-22P Pin no. 1 2 3 4 5 6 7 8 9 10 11 Pin name LIN1 VIN1 RIN1 C11 LIN2 VIN2 RIN2 C12 LIN3 VIN3 RIN3 Function Audio LIN1 Video IN1 Audio RIN1 SW1 control Audio LIN2 Video IN2 Audio RIN2 SW1 control Audio LIN3 Video IN3 Audio RIN3 Pin no. 12 13 14 15 16 17 18 19 20 21 22 Pin name C21 ROUT2 VOUT2 LOUT2 GND C22 VCC ROUT1 LOUT1 VOUT1 SAG Function SW2 control Audio ROUT2 Video OUT2 Audio LOUT2 GND SW2 control Power supply Audio ROUT1 Audio LOUT1 Video OUT1 Sag pin 3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI Block Diagram SW Logic Control input C11 C12 VOUT1 ROUT1 LOUT1 L L Mute Mute Mute L H VIn1 RIn1 LIn1 H L VIn2 RIn2 LIn2 H H VIn3 RIn3 LIn3 Control input Absolute Maximum Ratings Output signal Output signal C21 C22 VOUT2 ROUT2 LOUT2 L L Mute Mute Mute L H VIn1 RIn1 LIn1 H L VIn2 RIn2 LIn2 H H VIn3 RIn3 LIn3 (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 800 mW 3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC= 8V~13V) Item Symbol Operating power supply voltage VCC ICC1 ICC2 Consumption current Measurement circuit VCC Measurement conditions Min. Typ. Max. Units 8.0 13.0 V 22.0 29.0 mA 25.0 33.0 mA 5.7 6.2 6.7 dB -1.0 0 1.0 dB 0 3 % 0 3 deg 0 0.01 180 3 0.5 0.1 dB % µVrms µVrms 0 0.01 180 3 0.5 0.1 50 dB % µVrms µVrms VCC=9V VCC=12V VOUT1 output Voltage gain GV1 TP7 Frequency characteristic FV1 TP7 Differential gain DG1 TP8 Differential phase DP1 TP8 GR1 THDR1 VNM1 VNR1 TP5 TP5 TP5 TP5 SG3 : Sine wave 2.5VP-P, 1kHz SG3 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select -0.5 GL1 THDL1 VNM2 VNL1 TP6 TP6 TP6 TP6 SG1 : Sine wave 2.5VP-P, 1kHz SG1 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select -0.5 Gv2 TP2 -0.5 0 0.5 dB Frequency characteristic Fv2 TP2 -1.0 0 1.0 dB Differential gain DG2 TP3 0 3 % Differential phase DP2 TP3 SG2 : Sine wave 1VP-P, 0.1MHz SG2 : Sweep signal 1VP-P 10MHz/0.1MHz SG2 : Staircase wave 1VP-P APL=10, 50, 90% SG2 : Staircase wave 1VP-P APL=10, 50, 90% 0 3 deg GR2 THDR2 VNM3 VNR2 TP1 TP1 TP1 TP1 SG3 : Sine wave 2.5VP-P, 1kHz SG3 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select -0.5 0 0.01 180 3 0.5 0.1 dB % µVrms µVrms GL2 THDL2 VNM4 VNR2 TP4 TP4 TP4 TP4 SG1 : Sine wave 2.5VP-P, 1kHz SG1 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select -0.5 0 0.01 180 3 0.5 0.1 50 dB % µVrms µVrms VOFF1 VOFF2 VOFF3 VOFF4 VOFF5 VOFF6 TP7 TP2 TP5 TP1 TP6 TP4 VOUT1 pin DC level difference during switching VOUT2 pin DC level difference during switching ROUT1 pin DC level difference during switching ROUT2 pin DC level difference during switching LOUT1 pin DC level difference during switching LOUT2 pin DC level difference during switching 0 0 0 0 0 0 ±30 ±15 ±15 ±15 ±15 ±15 mV mV mV mV mV mV ROUT1 output Voltage gain Total harmonic distortion Mute noise Output noise voltage LOUT1 output Voltage gain Total harmonic distortion Mute noise Output noise voltage VOUT2 output Voltage gain ROUT2 output Voltage gain Total harmonic distortion Mute noise Output noise voltage LOUT2 output Voltage gain Total harmonic distortion Mute noise Output noise voltage Output offset voltage VOUT1 VOUT2 ROUT1 ROUT2 LOUT1 LOUT2 SG2 : Sine wave 1VP-P, 0.1MHz SG2 : Sweep signal 1VP-P 7MHz/0.1MHz SG2 : Staircase wave 1VP-P APL=10, 50, 90% SG2 : Staircase wave 1VP-P APL=10, 50, 90% 50 50 3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI Input impedance VIN RIV VIN1~VIN3 15 kΩ RIN RIR RIN1~RIN3 68 kΩ LIN RIL LIN1~LIN3 68 kΩ VOUT VOV VOUT2 50 Ω ROUT VOR ROUT1 and ROUT2 50 Ω LOUT VOL LOUT1 and LOUT2 50 Ω Output impedance Crosstalk VIN VOUT CTVV SG2 : 1VP-P, 4.43MHz RIN ROUT CTRR SG3 : 2.5VP-P, 1kHz LIN LOUT CTLL SG1 : 2.5VP-P, 1kHz VIN ROUT CTRV SG2 : 1VP-P, 100kHz VIN LOUT CTLV SG2 : 1VP-P, 100kHz *1 *2 *3 *4 *5 -60 -50 dB -80 -70 dB -80 -70 dB -70 -60 dB -70 -60 dB Switch input voltage SW input voltage H VIH Switching H level for each IC SW SW input voltage L VIL Switching L level for each IC SW D1 VCC=12V, SG1 : sine wave, 1kHz 2.1 V 0.7 V Input dynamic range VIN VOUT 2.6 VP-P 2.0 Vrms 2.0 Vrms VCC=12V, SG2 : sine wave, 1kHz RIN D2 ROUT Total higher harmonic distortion=0.5% VCC=12V, SG3 : sine wave, 1kHz LIN D3 LOUT Total higher harmonic distortion=0.5% *1 Crosstalk (V VOUT) Input a 1VP-P, 4.43MHz sine wave to SG2. Obtain CTVV using the following formula given output amplitude for combinations other than those below for SW control pin as VO1, and for the combinations below as VO2. CTVV=20 log (VO2/VO1) dB IN 1. CTVV1 2. CTVV2 Measuring pin TP8 Switch status S2 V1 V2 V3 V4 A L L L A H L A H B Measuring pin Switch status S2 V1 V2 V3 V4 H A L H L L L H A L H H L H L H A L H H H L L H L B H L L L B L H H L B H L L H B H H H L B H L H H C L L H H C H H L L C L H H H C H H L H C H L H H C H H H L TP3 3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI *2 Crosstalk (RIN ROUT) Input a 2.5VP-P, 1kHz sine wave to SG3. Obtain CTRR using the following formula given output amplitude for combinations other than those below for SW control pin as VO3, and for the combinations below as VO4. CTRR=20 log (VO4/VO3) dB 1. CTRR1 2. CTRR2 Measuring pin TP5 Switch status S3 V1 V2 V3 V4 A L L L A H L A H B Measuring pin Switch status S3 V1 V2 V3 V4 H A L H L L L H A L H H L H L H A L H H H L L H L B H L L L B L H H L B H L L H B H H H L B H L H H C L L H H C H H L L C L H H H C H H L H C H L H H C H H H L TP1 Crosstalk (L *3 Input a 2.5V LOUT) P-P, 1kHz sine wave to SG3. Obtain CTLL using the following formula given output amplitude for combinations other than those below for SW control pin as VO5, and for the combinations below as VO6. CTLL=20 log (VO6/VO5) dB IN 1. CTLL1 2. CTLL2 Measuring pin TP6 Switch status S1 V1 V2 V3 V4 A L L L A H L A H B Measuring pin Switch status S1 V1 V2 V3 V4 H A L H L L L H A L H H L H L H A L H H H L L H L B H L L L B L H H L B H L L H B H H H L B H L H H C L L H H C H H L L C L H H H C H H L H C H L H H C H H H L TP4 3-Input 2-Output 3-Circuit Video Switch MM1238 MITSUMI *4 Crosstalk (V IN-ROUT, LOUT) Input a 1Vp-p, 100kHz sine wave to SG2. Obtain CTRV (CTLV) using the following formula given output amplitude for combinations other than those below for SW control pin as VO7, and for the combinations below as VO8. CTRV (CTLV)=20 log (VO8/VO7) dB 1. CTRV 2. CTLV Measuring pin TP5 TP1 Measuring Circuit Switch status S2 V1 V2 V3 V4 A L H L H B H L H L C H H H A L H B H C H Measuring pin Switch status S2 V1 V2 V3 V4 A L H L H B H L H L H C H H H H L H A L H L H L H L B H L H L H H H C H H H H TP6 TP4