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| MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 3-Input 2-Output 3-Circuit Video Switch Monolithic IC MM1238 Outline This IC is a video switch developed for large and medium-sized high quality TVs, with 3-input and 2-output circuits. It is suitable for BS, JSB, CS or M-N (Muse NTSC conversion) comparator switching. The BS-CS decoder can be used as a W decoder. Features 1. One of the two video signal outputs is for external output, and has a 6dB amp, 75, 1VP-P 2. Input impedance 15k Video circuits 1~3 Audio circuits 1~3 68k 3. Crosstalk Video -60dB (at 4.43MHz) Audio -80dB (at 1kHz) -70dB (at 100kHz) Video : Audio 10MHz (6dB, 75, amp only, 7MHz) 4. Frequency response 5. Power supply voltage 8.0V~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 MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 Block Diagram SW Logic Control input C11 L L H H C12 L H L H Output signal VOUT1 Mute VIn1 VIn2 VIn3 ROUT1 Mute RIn1 RIn2 RIn3 LOUT1 Mute LIn1 LIn2 LIn3 Control input C21 L L H H C22 L H L H Output signal VOUT2 Mute VIn1 VIn2 VIn3 ROUT2 Mute RIn1 RIn2 RIn3 LOUT2 Mute LIn1 LIn2 LIn3 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 15 800 Units C C V mW MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 Electrical Characteristics Item Operating power supply voltage Consumption current VOUT1 output Voltage gain Frequency characteristic Differential gain Differential phase 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 Frequency characteristic Differential gain Differential phase 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 (Except where noted otherwise, Ta=25C, VCC= 8V~13V) Measurement circuit VCC Symbol VCC ICC1 ICC2 GV1 FV1 DG1 DP1 Measurement conditions Min. Typ. Max. Units 8.0 13.0 V 22.0 29.0 mA 25.0 33.0 mA 6.2 0 0 0 6.7 1.0 3 3 dB dB % deg VCC=9V VCC=12V TP7 TP7 TP8 TP8 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% SG3 : Sine wave 2.5VP-P, 1kHz SG3 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select SG1 : Sine wave 2.5VP-P, 1kHz SG1 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select 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% SG3 : Sine wave 2.5VP-P, 1kHz SG3 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select SG1 : Sine wave 2.5VP-P, 1kHz SG1 : Sine wave 2.5VP-P, 1kHz 15kHz band during mute select 15kHz band during pin select 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 5.7 -1.0 GR1 THDR1 VNM1 VNR1 GL1 THDL1 VNM2 VNL1 Gv2 Fv2 DG2 DP2 TP5 TP5 TP5 TP5 TP6 TP6 TP6 TP6 TP2 TP2 TP3 TP3 -0.5 0 0.01 180 3 0 0.01 180 3 0 0 0 0 0.5 0.1 50 0.5 0.1 50 0.5 1.0 3 3 dB % Vrms Vrms dB % Vrms Vrms dB dB % deg -0.5 -0.5 -1.0 GR2 THDR2 VNM3 VNR2 GL2 THDL2 VNM4 VNR2 VOFF1 VOFF2 VOFF3 VOFF4 VOFF5 VOFF6 TP1 TP1 TP1 TP1 TP4 TP4 TP4 TP4 TP7 TP2 TP5 TP1 TP6 TP4 -0.5 0 0.01 180 3 0 0.01 180 3 0 0 0 0 0 0 0.5 0.1 50 0.5 0.1 50 30 15 15 15 15 15 dB % Vrms Vrms dB % Vrms Vrms mV mV mV mV mV mV -0.5 MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 Input impedance VIN RIN LIN Output impedance VOUT ROUT LOUT Crosstalk VIN RIN LIN VIN VIN VOUT ROUT LOUT ROUT LOUT CTVV CTRR CTLL CTRV CTLV VIH VIL D1 D2 SG2 : 1VP-P, 4.43MHZ SG3 : 2.5VP-P, 1kHZ SG1 : 2.5VP-P, 1kHZ SG2 : 1VP-P, 100kHz SG2 : 1VP-P, 100kHz VOV VOR VOL VOUT2 ROUT1 and ROUT2 LOUT1 and LOUT2 50 50 50 -50 -70 -70 -60 -60 dB dB dB dB dB V 0.7 2.6 2.0 V VP-P Vrms RIV RIR RIL VIN1~VIN3 RIN1~RIN3 LIN1~LIN3 15 68 68 k k k *1 *2 *3 *4 *5 2.1 -60 -80 -80 -70 -70 Switch input voltage SW input voltage H SW input voltage L Input dynamic range VIN VOUT VCC=12V, SG1 : sine wave, 1kHz VCC=12V, SG2 : sine wave, 1kHz RIN ROUT Total higher harmonic distortion=0.5% VCC=12V, SG3 : sine wave, 1kHz LIN LOUT D3 Total higher harmonic distortion=0.5% VOUT) *1 Crosstalk (VIN 4.43MHz sine wave to SG2. Input a 1VP-P, 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 1. CTVV1 Measuring pin Switch status S2 A A A B TP8 B B C C C V1 L H H L L H L L H V2 L L H L H H L H L V3 L L L H H H H H H V4 H H H L L L H H H TP3 2. CTVV2 Measuring pin Switch status S2 A A A B B B C C C V1 L L L H H H H H H V2 H H H L L L H H H V3 L H H L L H L L H V4 L L H L H H L H L 2.0 Vrms Switching H level for each IC SW Switching L level for each IC SW MITSUMI Crosstalk (RIN ROUT) *2 Input a 2.5VP-P, 1kHz sine wave to SG3. 3-Input 2-Output 3-Circuit Video Switch MM1238 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 Measuring pin Switch status S3 A A A B TP5 B B C C C V1 L H H L L H L L H V2 L L H L H H L H L V3 L L L H H H H H H V4 H H H L L L H H H TP1 2. CTRR2 Measuring pin Switch status S3 A A A B B B C C C V1 L L L H H H H H H V2 H H H L L L H H H V3 L H H L L H L L H V4 L L H L H H L H L Crosstalk (LIN *3 Input a 2.5VP-P, LOUT) sine wave to SG3. 1kHz 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 1. CTLL1 Measuring pin Switch status S1 A A A B TP6 B B C C C V1 L H H L L H L L H V2 L L H L H H L H L V3 L L L H H H H H H V4 H H H L L L H H H TP4 2. CTLL2 Measuring pin Switch status S1 A A A B B B C C C V1 L L L H H H H H H V2 H H H L L L H H H V3 L H H L L H L L H V4 L L H L H H L H L MITSUMI Crosstalk (VIN-ROUT, LOUT) *4 Input a 1Vp-p, 100kHz sine wave to SG2. 3-Input 2-Output 3-Circuit Video Switch MM1238 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 Measuring pin Switch status S2 A TP5 B C A TP1 B C V1 L H H L H H V2 H L H H L H V3 L H H L H H V4 H L H H L H TP4 TP6 2. CTLV Measuring pin Switch status S2 A B C A B C V1 L H H L H H V2 H L H H L H V3 L H H L H H V4 H L H H L H Measuring Circuit |
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