mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) monolithic ic MM1221~mm1228 outline these ics are high-end video switch ics with 2-input 1-output or 3-input 1-output including a 75 ? driver. the series includes those with and without a built-in clamp circuit and a 6db amp. the circuit configuration table and block diagram are shown below. mm1228 is introduced as a representative model in this document. MM1221~mm1228 series circuit configuration table MM1221~mm1228 input/output voltage measurement values (typ.) model name # of inputs # of outputs 6db amp circuit clamp circuit power supply voltage range MM1221 21 no no 8~13v mm1222 21 yes no 8~13v mm1223 31 no no 8~13v mm1224 31 yes no 8~13v mm1225 21 no yes 4.7~13v mm1226 21 yes yes 4.7~13v mm1227 31 no yes 4.7~13v mm1228 31 yes yes 4.7~13v model name power supply 5v 9v 12v unit voltage MM1221 input voltage 4.53 6.05 v output voltage 4.5 6.1 v mm1222 input voltage 4.05 5.4 v output voltage 5.34 7.12 v mm1223 input voltage 4.53 6.05 v output voltage 4.5 6.1 v mm1224 input voltage 4.05 5.4 v output voltage 5.34 7.12 v mm1225 input voltage 1.27 2.17 2.86 v output voltage 1.31 2.25 2.96 v mm1226 input voltage 1.3 2.2 2.9 v output voltage 1.4 2.23 2.88 v mm1227 input voltage 1.27 2.17 2.86 v output voltage 1.31 2.25 2.96 v mm1228 input voltage 1.3 2.2 2.9 v output voltage 1.4 2.23 2.88 v november 2, 2001
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 control input truth table control input truth table sw1 sw2 out ll in1 hl in2 l/h h in3 sw1 sw2 out ll in1 hl in2 l/h h in3 block diagram (MM1221~mm1228) sw out l in1 h in2 control input truth table sw out l in1 h in2 control input truth table
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 control input truth table control input truth table sw1 sw2 out ll in1 hl in2 l/h h in3 sw1 sw2 out ll in1 hl in2 l/h h in3 control input truth table sw out l in1 h in2 control input truth table sw out l in1 h in2
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/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. 1v p-p video signals can be output externally with 75 ? output. features 1. built-in 75 ? driver circuit 2. built-in 6db amp 3. built-in clamp circuit 4. models in the MM1221~mm1228 series without a clamp circuit can support audio or chroma circuits 5. mute operation possible 6. wide operating supply voltage range 4.7~13v 7. low current consumption 8. wideband frequency response 7mhz at 0db 9. crosstalk - 64db (4.43mhz) packages sop-8c (mm1228xf) applications 1. tv 2. vcr 3. video cameras 4. other video equipment block diagram sw1 sw2 out ll in1 hl in2 l/h h in3 control input truth table november 2, 2001
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 pin description pin no. pin name function internal equivalent circuit diagram 1 in1 input 3 in2 5 in3 2 sw1 switch 4 sw2 7 out output 6 v cc power supply 8 gnd ground
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 measuring circuit absolute maximum ratings (ta=25 c) item symbol ratings units storage temperature t stg - 40~+125 c operating temperature t opr - 20~+75 c power supply voltage v cc 15 v allowable loss pd 300 mw electrical characteristics (except where noted otherwise, ta=25 c, v cc =5.0v) item symbol measurement conditions min. typ. max. units operating power supply voltage range v cc 4.7 13.0 v consumption current id refer to measuring circuit 8.4 10.9 ma voltage gain g v refer to measuring circuit +5.5 +6.0 +6.5 db frequency characteristic f c refer to measuring circuit - 10+1db differential gain dg refer to measuring circuit 0 3 % differential phase dp refer to measuring circuit 0 3 deg output offset voltage voff refer to measuring circuit ?0 mv crosstalk c t refer to measuring circuit - 64 - 54 db sw1 input voltage h v ih 1 refer to measuring circuit 2.1 v sw1 input voltage l v il 1 refer to measuring circuit 0.7 v sw2 input voltage h v ih 2 refer to measuring circuit 2.1 v sw2 input voltage l v il 2 refer to measuring circuit 0.7 v
mitsumi 2-input 1-output video switch (w/75 ? driver)/3-input 1-output video switch (w/75 ? driver) MM1221~1228 measuring procedures (v cc =5.0v, vc1=v cc , vc2=0v) item symbol switch state measuring procedure s1 s2 s3 s4 s5 consumption id 22222 current 12222 voltage gain gv 21212 22111 22121 12222 frequency f c 21212 characteristic 22111 22121 12222 differential gain dg 21212 22111 22121 12222 differential phase dp 21212 22111 22121 22222 output offset voff 22212 voltage 22211 12212 12221 12211 crosstalk c t 21222 21221 21211 22122 22112 22212 switch 1 input v ih 1 voltage h switch 1 input v il 1 voltage l 22221 switch 2 input v ih 2 voltage h switch 2 input v il 2 voltage l connect a dc ammeter to the v cc pin and measure. the ammeter is shorted for use in subsequent measurements. input a 1.0v p - p , 100khz sine wave to sg, and obtain g v from the following formula given tp1 voltage as v1 and tp3 voltage as v2. g v =20log (v2/v1) db for the above g v measurement, given tp3 voltage for 7mhz as v3, f c is obtained from the following formula. f c =20log (v3/v2) db input a 1.0v p - 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 1.0v p - p , 4.43mhz sine wave to sg, and given tp1 voltage as v4 and tp3 voltage as v5, c t is obtained from the following formula. c t =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 v ih 1. gradually lower from vc1=v cc . tp5 voltage when tp7 voltage is output on tp2 is v il 1. impress an optional dc voltage on tp7 and tp9. gradually raise from vc1=0v. tp5 voltage when tp9 voltage is output on tp2 is v ih 2. gradually lower from vc1=v cc . tp6 voltage when tp7 voltage is output on tp2 is v il 2.
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