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mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 1 discription M52746SP is semiconductor integrated circuit for crt display monitor. it includes osd blanking,osd mixing,retrace blanking,wide band amplifre,brightness control. main/sub contrast and osd adjustfunction can be controlled by i2c bus. frequency band width: rgb 200 mhz (at -3db) osd 80 mhz input : rgb 0.7 vp-p (typ) osd light 4 vp-p minimum (positive) osd harf 2.5vp-p minimum (positive) 3.0vp-p maximum (positive) blk(for osd) 3 vp-p minimum (positive) retrace blk 3 vp-p minimum (positive) output : rgb 5.5 vp-p (maximum) osd 5 vp-p (maximum) main contrast and sub contrast can be controlled by i2c bus. structure bipola silicon monolisic ic application crt display monitor recommended operating conditions supply voltage range 11.5v~12.5v(v7,v12,v25,v29,v32) 4.5v~4.4v(v17) rated supply voltage 12.0v(v7,v12,v25,v29,v32) 5.0v(v17) major specification bus controlled 3ch video pre-amp with osd mixing function features pin configuration outside package: 32p4b brightness 1 32 2 31 3 30 4 29 5 28 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 20 14 19 15 18 vcc 12v input (r) input (g) input (b) gnd osd blk in osd in (r) osd in (g) osd in (b) output(r) gnd(r) output(b) gnd(b) output(g) gnd(g) retrace blk in sda abl in scl clamp pulse in gnd vcc 12 v (g) vcc 12 v (b) vcc 12 v (r) gnd vcc 5 v vcc 12 v input(sog) sog sep out 16 17 nc gnd 32 pin plastic sdip
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 2 absolute maximum rating (ambient temperature: 25 c) 0 2000 1600 1200 800 400 - 20 25 50 75 100 125 150 2400 2800 2358 1415 thermal derating curve ambient temperature ta( c) attached board -20~ +75 vcc12 pd topr tstg vopr 12 vopr' 12 jc 13.0 2358 -40~ +150 12.0 10.5~12.5 ( typ 12.0v ) 28 v mw c c v v c/w supply voltage 12 ambient temperature storage temperature recommended supply 12 case temperature power dissipation voltage range 12 parameter symbol rating unit supply voltage 5 vcc 5 6.0 v recommended supply 5 vopr 5 5.0 vopr' 5 4.5~5.5 ( typ 5.0v ) v voltage range 5 v
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 3 fig. 1 block diagram
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 (1) slave address: (2) each function's sub address: bus control table d7 d6 d5 d4 d3 d2 d1 r/w 1 0 0 0 1 0 0 0 =88h 4 no. function bit sub add. d7 d6 d5 d4 d3 d2 d1 d0 1 main contrast 8 01h a07 a06 a05 a04 a03 a02 a01 a00 0 1 0 0 0 0 0 0 2 sub contrast r 8 02h a17 a16 a15 a14 a13 a12 a11 a10 1 0 0 0 0 0 0 0 3 sub contrast g 8 03h a27 a26 a25 a24 a23 a22 a21 a20 1 0 0 0 0 0 0 0 4 sub contrast b 8 04h a37 a36 a35 a34 a33 a32 a31 a30 1 0 0 0 0 0 0 0 5 osd level 4 - - - - a43 a42 a41 a40 0 0 0 0 1 0 0 0 00h data byte(up:bit information down:preset)
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 sda,scl characteristics parameter symbol min max unit min. input low voltage. max. input high voltage. scl clock frequency. time the bus must be free before a new transmission can start. hold time start condition.after this period the first clock pulse is generated. the low period of the clock. the high period of the clock. srt up time for start condition. (only relevant for a repeated start condition.) hold time data. set-up time data. rise time of both sda and scl lines. fall time of both sda and scl lines. set-up time for stop condition. f scl t buf t hd:sta t low t high t su:sta t hd:dat t su:dat t r t f t su:sto v il v ih -0.5 1.5 v 3.0 5.5 v 0 100 khz 4.7 4.0 4.7 4.0 4.7 0 250 1000 300 4.0 u s ns ns ns u s u s u s u s u s u s - - - - - - - - - - t r, t f t buf t low t high t hd:dat t su:dat sda scl v il v ih v il v ih t hd:sta t su:sta t su:st o s s p s 5 i c bus control section 2
min typ max no 7 9 11 rgb in 2 3 4 osd in 16 cp in 5 18 22 1 osd blk abl ret blk bright bus ctl ( h ) 13 sog in 00h main cont 01h 02h 03h 04h sub cont r sub cont g sub cont b osd adj ctl voltage parameter symbol test point(s) input standard unit re- mark 1 2 3 4 5 6 7 8 9 10 11 12 13 circuit current1 icc1 icc2 ma 110 ma vomax b sg5 b sg5 b sg5 b sg5 b sg5 b sg5 b sg5 4.0 4.0 b sg2 vimax b sg2 variable 2.0 gv b sg1 2.0 gv 14 vc1 b ag1 b sg1 2.0 2.0 2.0 2.0 vc1 vc2 vc2 vsc1 vsc1 vsc2 vsc2 18 i a i b 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 vc3 vc3 out out out out out out out a a a a a a a a a a a a a a a a 15 16 ffh 255 ffh 255 ffh 255 ffh 255 00h 0 64h 100 ffh 255 c8h 200 64h 100 14h 20 ffh 255 64h 100 64h 100 64h 100 c8h 200 c8h 200 c8h 200 6.0 8.0 vp-p 1.6 17.1 17.7 19.4 vp-p db 0.8 1.0 1.2 15.0 16.5 19.0 db 0.8 1.0 1.2 10.5 db 0.8 1.0 1.2 0.1 0.5 0.8 vp-p 0.8 1.0 1.2 15.5 16.5 19.0 db 0.8 1.0 1.2 12.0 db 0.8 1.0 1.2 in out a a a a a a a a a a a a a a 2.0 5.0 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ffh 255 - - - - - - - - - - - 135 35 - - 9.0 13.0 9.0 13.0 circuit current2 output dynamic range maximum input maximum gain relative maximum gain main contrast control characteristics 1 main contrast control relative characteristics 1 sub contrast control characteristics 1 sub contrast control relative characteristics 1 main contrast control characteristics 2 main contrast control relative characteristics 2 main contrast control characteristics 3 main contrast control relative characteristics3 sub contrast control characteristics 2 sub contrast control relative characteristics 2 - - - - - - variable note1 note2 note3 note4 note5 note6 note7 note8 note9 note10 note11 note13 note15 note12 note14 note16 supplementary table1 electrical characteristics (vcc= 12v,5v; ta= 25 c unless otherwise specified) b sg1 b sg5 a a a a b sg1 b sg5 a a a a b sg1 b sg5 a a a a
min typ max no 7 9 11 rgb in 2 3 4 osd in 16 cp in 5 18 22 1 osd blk abl ret blk bright bus ctl ( h ) 13 sog in 00h main cont 01h 02h 03h 04h sub cont r sub cont g sub cont b osd adj ctl voltage parameter symbol test point(s) input standard unit re- mark vmsc vmsc vb1 vb1 vb2 vb2 vb3 vb3 vp-p 0.8 1.0 1.2 fc1 fc1 4.6 3.6 4.8 vsc3 vsc3 abl control relative characteristics 1 abl1 abl1 abl2 abl2 2.0 5.0 ffh 255 14h 20 14h 20 14h 20 00h 0 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 out 2.0 5.0 out 2.0 4.0 out 2.0 2.0 out 4.0 5.0 out 2.0 5.0 out 1.0 5.0 out 5.0 out c8h 200 c8h 200 c8h 200 c8h 200 ffh 255 ffh 255 ffh 255 ffh 255 0.1 0.5 0.8 vp-p 0.8 1.0 1.2 4.7 5.5 6.3 vp-p 1.7 2.2 2.7 0.8 1.0 1.2 vp-p 0.8 1.0 1.2 3.3 3.8 4.2 -0.3 0 0.3 1.5 1.8 2.1 0.5 0.9 1.1 v v v -2.0 0 2.5 db -1.0 0 1.0 db b sg1 a a - - a a a a a b sg3 b sg1 - - a 5v b sg5 b sg5 a - a a a - a a - - - - - - - - - - - - - - - - - - - - - - - - - - -0.3 0 0.3 -0.3 0 0.3 note17 note18 note19 note20 note21 note22 note23 note24 note25 note26 note27 note29 note31 note28 note30 note32 - - - - - - - sub contrast control characteristics 3 sub contrast control relative characteristics 3 main/sub contrast control characteristics main/sub contrast control relative characteristics abl control characteristics 1 abl control relative characteristics2 abl control characteristics 2 brightness control characteristics 1 brightness control relative characteristics 1 brightness control characteristics 2 brightness control relative characteristics 2 brightness control characteristics 3 brightness control relative characteristics 3 frequency characteristics 1 (f=50mhz) frequency relative characteristics 1 (f=50mhz) variable vari able b sg1 a a b sg5 a a - - - - - - - a a b sg5 a a - - - - - - - b sg1 a a b sg5 a a - - - - - - - - - - - - - - a a a b sg5 a a - - - - - - - a a a b sg5 a a - - - - - - - - - - - - - -
min typ max no 7 9 11 rgb in 2 3 4 osd in 16 cp in 5 18 22 1 osd blk abl ret blk bright bus ctl ( h ) 13 sog in 00h main cont 01h 02h 03h 04h sub cont r sub cont g sub cont b osd adj ctl voltage parameter symbol test point(s) input standard unit re- mark fc2 fc2 crosstalk 1 (f=50mhz) crosstalk 1 (f=200mhz) ct1 ct1' tr tf vthcp wcp pdch pdcl ct2 ct2' ct3 ct3' fc1' fc1' 5.0 00h 0 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 out ffh 255 ffh 255 ffh 255 5.0 out 5.0 out(29) out(32) 2 b sg3 6 a 11a 5.0 2 a 6 b sg3 11a 5.0 2 a 6 a 11b sg3 5.0 out 5.0 2 b sg3 6 a 11a 5.0 out(29) out(35) 2 a 6 b sg3 11a 5.0 out(32) out(35) 2 a 6 a 11b sg3 5.0 out 2.0 5.0 out 2.0 5.0 out 2.0 5.0 out 2.0 5.0 out b sg5 variable ffh 255 ffh 255 -3.0 0 3.0 db -1.0 0 1.0 db -3.0 3.0 5.0 db -1.0 0 1.0 db -25 -20 db -20 -15 db - - -25 -20 db -20 -15 db - - -25 -20 db -20 -15 db - - 2.2 2.2 ns ns 1.0 1.5 2.0 v 0.2 - u s -3.0 0 0.3 -3.0 0 0.3 v v b sg3 - - - - a a a 5v a - a - - a a a a a a a a b sg5 b sg5 b sg5 variable a a a a a a a a b sg1 - - 2.8 2.8 out(29) out(32) out(29) out(35) out(32) out(35) frequency characteristics 1 (f=200mhz) frequency relative characteristics 1 (f=200mhz) frequency characteristics 2 (f=200mhz) frequency relative characteristics 2 (f200mhz) crosstalk 2 (f=50mhz) crosstalk 2 (f=200mhz) crosstalk 3 (f=50mhz) crosstalk 3 (f=200mhz) pulse characteristics 1 (4vp-p) pulse characteristics 2 (4vp-p) clamp pulse threshold voltage clamp pulse minimum width pedestal voltage temperature characteristics 1 pedestal voltage temperature characteristics 2 note33 note34 note35 note36 note37 note38 note39 note40 note41 note42 note43 note44 note45 note46 note47 note48 variable variable varia ble varia ble varia ble - b sg3 a a a 5v a a - - - - - - - variable a a a 5v a a variable a a a a a 5v variable a a a a a 5v variable a a a a a 5v variable a a a a a 5v variable a a a a a 5v variable a a a a a 5v variable a a a a a 5v b sg1 b sg1 b sg1 b sg1 b sg1
min typ max no 7 9 11 rgb in 2 3 4 osd in 16 cp in 5 18 22 1 osd blk abl ret blk bright bus ctl ( h ) 13 sog in 00h main cont 01h 02h 03h 04h sub cont r sub cont g sub cont b osd adj ctl voltage parameter symbol test point(s) input standard unit re- mark oaj1 oaj1 vthret oaj3 oaj3 vthosd1 otr otf ss - nv ss - sv 2.0 5.0 08h 8 49 50 51 52 53 54 55 56 57 58 59 60 61 62 out ffh 255 ffh 255 ffh 255 ns ffh 255 2.0 5.0 out 2.0 5.0 out 2.0 5.0 out 2.0 5.0 out 2.0 5.0 out 2.0 5.0 s on g in sync out 2.0 5.0 s on g in sync out 0fh 15 08h 8 00h 0 08h 8 00h 0 3.0 6.0 3.0 6.0 ns 5.6 6.4 7.2 vp-p 0.8 1.0 1.2 1.2 0.7 0 vp-p 0.8 1.0 1.2 3.1 3.5 3.9 v 1.0 1.5 2.0 v 0.03 0.2 vp-p vp-p - a a a a a a a a a a a a a a a b sg5 b sg5 b sg5 b sg5 b sg5 b sg5 b sg6 b sg6 b sg6 b sg6 b sg6 variable b sg6 b sg6 a a b sg6 b sg7 variable a b sg4 variable a a a a a a a a a a a a a oaj2 oaj2 2.0 5.0 out a a b sg5 b sg6 b sg6 a 63 64 3.4 4.0 4.6 vp-p 0.8 1.0 1.2 08h 8 - - - - - - - - - - - - - - osd pulse characteristics 1 osd pulse characteristics 2 osd adjust control characteristics 1 osd adjust control relative characteristics 1 osd adjust control characteristics 2 osd adjust control relative characteristics 2 osd adjust control characteristics 3 osd adjust control relative characteristics 3 osd input threshold voltage 1 vthblk 2.0 5.0 out 2.2 2.7 3.2 v a a b sg5 b sg6 variable a b sg1 osd blk input threshold voltage retrace blk i nput threshold voltag sog input maximum noize voltage sog minimum input voltage note49 note50 note51 note52 note53 note54 note55 note56 note57 note58 note59 note60 note61 note62 note63 note64 - - - b sg4 variable vthosd2 2.0 5.0 out 08h 8 1.5 2.0 2.5 v a a b sg5 b sg6 variable a b sg6 osd input threshold voltage 2 ohaj1 2.0 5.0 out 0fh 15 3.7 4.3 4.9 vp-p a a a b sg5 b sg6 3v b sg6 osd half adjust control characteristics 1 00h 0 ohaj2 2.0 5.0 out a a b sg5 b sg6 3v b sg6 a 1.9 2.5 3.0 vp-p 08h 8 osd half adjust control characteristics 2 - - - - - - - - - - - - - - - - - - - - -
min typ max no 7 9 11 rgb in 2 3 4 osd in 16 cp in 5 18 22 1 osd blk abl ret blk bright bus ctl ( h ) 13 sog in 00h main cont 01h 02h 03h 04h sub cont r sub cont g sub cont b osd adj ctl voltage parameter symbol test point(s) input standard unit re- mark sync output delay time1 sync output hi level vsh vsl tds-f tds-r iccps skv ma vdc 2.0 5.0 67 68 69 70 sync out 2.0 5.0 sync out 2.0 5.0 sync out 2.0 5.0 sync out ips 4.0 5.0 vcc (12v) 2.0 5.0 ffh 255 ffh 255 ffh 255 ffh 255 00h 0 4.5 4.9 5.0 v 0 0.3 0.6 v 0 60 90 ns 0 60 90 ns - 22 30 9.4 10.0 10.4 65 66 a a a a a a a a b sg 1 a a a a a a a a a a a a b sg 5 a a a a a a a a a b sg4 b sg4 b sg4 b sg4 icc (power save mode) spot killer function voltage note65 note66 note67 note68 note69 note70 sync output lo level sync output delay time2 b sg 5 ffh 255 ffh 255 ffh 255 ffh 255 00h 0
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 11 note1) measuring conditions are as listed in supplementary table. measured with a current meter at test point ia. note2) measuring conditions are as listed in supplementary table. measured with a current meter at test point ib. note3) decrease v1 gradually, and measure the voltage when the bottom of waveform output is distorted. the voltage is called vcl. next, increase v1 gradually, and measur e the voltage when the top of waveform output is distorted. the voltage is called voh. voltagr vomax is calculated by the equation below: vomax = voh - vol note4) increase the input signal(sg2) amplitude gradually, starting from 700mvp-p. measure the amplitude of the input signal when the output signal starts becoming distorted. note5) input sg1, and read the amplitude output at out(24,28,31). the amplitude is called vout(24,28,31).maximum gain gv is calculated by the equation below: note6) relative maximum gain gv is calculated by the equation below: gv=vout(24)/vout(18), vout(28)/vout(31), vout(31)/vout(24) note7) measuring the amplitude output at out(24,28,31). the measured value is called vout(24,28,31). main contrast conrol characteristics vc1 is calculated by the equation below: note8) relative characteristics vc1 is calculated by the equation below: vc1=vout(24)/vout(28) , vout(28)/vout(31) , vout(31)/vout(24) note9) measuring condition and procedure are the same as described in note7. note10) measuring condition and procedure are the same as described in note8. note11) measuring condition and procedure are the same as described in note7. note12) measuring condition and procedure are the same as described in note8. vout 0.7 gv=20 log (db) vout 0.7 vc1=20 log (db) waveform output 0.0 (v) 5.0 voh vol
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 note13) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31). sub contrast conrol characteristics vsc1 is calculated by the equation below: note14) relative characteristics vsc1 is calculated by the equation below: vsc1 = vout(24) / vout(28) , vout(28) / vout(31) , vout(31) / vout(24) note15) measuring condition and procedure are the same as described in note13. note16) measuring condition and procedure are the same as described in note14. note17) measuring condition and procedure are the same as described in note13. note18) measuring condition and procedure are the same as described in note14. note19) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31). main/sub contrast conrol characteristics vmsc1 is calculated by the equation below: note20) relative characteristics vmsc1 is calculated by the equation below: vmsc = vout(24) / vout(28) , vout(28) / vout(31) , vout(31) / vout(24) note21) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31), and is ttreated as abl1. note22) relative characteristics abl1 i s calculated by the equation below: abl1 = vout(24) / vout(28) , vout(28) / vout(31) , vout(31) / vout(24) note23) measuring condition and procedure are the same as described in note21. note24) measuring condition and procedure are the same as described in note22. note25) measure the dc voltage at out(24,28,31) with a voltmeter. the measured value is called vout(24,28,31), and is ttreated as vb1. note26) relative characteristics vb1 is calculated by the difference in the output between the channels. vb1 = vout(24) - vout(28) , vout(28) - vout(31) , vout(31) - vout(24) note27) measuring condition and procedure are the same as described in note25. note28) measuring condition and procedure are the same as described in note26. note29) measuring condition and procedure are the same as described in note25. note30) measuring condition and procedure are the same as described in note26. 12 vout 0.7 vsc1 = 20 log (db) vout 0.7 vmsc1 = 20 log (db)
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 note31) first, sg3 to 1mhz is as input signal. input a resister that is about 2k to offer the voltage at input pins(6,9,11) in order that the bottom of input signal is 2.5v. control the main contrast in order that the amplitude of sine wave output is 4.0vp-p. control the brightness in order that the bottom of sine wave output is 2.0vp-p. by the same way, measure the output amplitude when sg3 to 50mhz is as input signal. the measured value is called vout( 24,28,31 ). frequency characteristics fc1( 24,28,31 ) is calculated by the equation below: note32) relative characteristics fc1 is calculated by the difference in the output between the channels. note33) measuring condition and procedure are the same as described in note31,expect sg3 to 200mhz. note34) relative characteristics fc1' is calculated by the difference in the output between the channels. note35) sg3 to 1mhz is as input signal. control the main contrast in order that the amplitude of sine wave output is 1.0vp-p. by the same way, measure the output amplitude when sg3 to200mhz is as input signal. the measured value is called vout( 24,28,31 ). frequency characteristics fc2( 24,28,31 ) is calculated by the equation below: note36) relative characteristics fc2 is calculated by the difference in the output between the channels. note37) input sg3 (5 0mhz) to pin2 only, and then measure the waveform amplitude output at out( 24,28,31 ).the measured value is called vout( 24,28,31 ). crosstalk ct1 is calculated by the equation below: note38) measuring condition and procedure are the same as described in note37,expect sg3 to 200mhz. note39) input sg3 (50mhz) to pin6 only, and then measure the waveform amplitude output at out( 24,28,31 ).the measured value is called vout( 24,28,31 ). crosstalk ct2 is calculated by the equation below: note40) measuring condition and procedure are the same as described in note39,expect sg3 to 200mhz. note41) input sg3 (50mhz) to pin11 only, and then measure the waveform amplitude output at out( 24,28,31 ).the measured value is called vout( 24,28,31 ). crosstalk ct2 is calculated by the equation below: note42) measuring condition and procedure are the same as described in note41,expect sg3 to 200mhz. 13 vout(24,28) ct1 = 20 log (db) vout(31) vout(24,31) ct2 = 20 log (db) vout(28) vout(28,31) ct3 = 20 log (db) vout(24) vout vp-p fc1 = 20 log (db) output amplitude when inputed sg3(1mhz) : 4.0vp-p vout vp-p fc2 = 20 log (db) output amplitude when inputed sg3(1mhz) : 4.0vp-p
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 note43) control the main contrast (00h) in order that the amplitude of output signal is 4.0vp-p. control the brightness (v1) in order that the black level of output signal is 2.0v. measure the time needed for the input pulse to rise from 10 % to 90 % (tr1) and for the output pulse to rise from 10 % to 90 % (tr2) with an active prove. pulse characteristics tr is calculated by the equations below : note44) measure the time needed for the input pulseto fall from 90 % to 10 % (tf1) and for the output pulse to fall from 90 % to 10 % (tf2) with an active prove. pulse characteristics tf is calculated by the equations below : note45) turn down the sg5 input level gradually from 5.0vp-p, monitoring the waveform output. measure the top level of input pulse when the output pedestal voltage turn decrea se with unstable. note46) decrease the sg5 pulse width gradually from 0.5us, monitoring the output. measure the sg5 pulse width (a point of 1.5v) when the output pedestal voltage turn decrease with unstable. note47) measure the pedestal voltage at 25 c. the measured value is called pdc1. measure the pedestal voltage at temperature of -20 c. the measured value is called pdc2. pedestal voltage temperature characteristics 1 is calculated by the equation below: pdch=pdc1-pdc2 note48) measure the pedestal voltage at 25 c. the measured value is called pdc1. measure the pedestal voltage at temperature of 75 c. the measured value is called pdc3. pedestal voltage temperature characteristics 2 is calculated by the equation below: pdcl=pdc1-pdc3 tr = ( tr2 ) - ( tr1 ) (nsec) 2 2 100% 90% 0% 10% tr1 or tr2 tf1 or tf2 tf = (tf2 ) - ( tf1 ) (nsec) 2 2 14
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 note49) measure the time needed for the output pulse to rise from 10% to 90%(otr) with an active prove. note50) measure the time needed for the output pulse to fall from 90% to 10% (otf) with an active prove. note51) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31), and is treated as oaj1. note52) relative characteristics oaj1 is calculated by the equation below: oaj1=vout(24)/vout(28), vout(28)/vout(31), vout(31)/vout(24) note53) measuring condition and procedure are the same as described in note51. note54) measuring condition and procedure are the same as described in note52. note55) measuring condition and procedure are the same as described in note51. note56) measuring condition and procedure are the same as described in note52. note57) reduce the sg6 input level gradually, monitoring output. measure the sg6 level when the output reaches 65~75% of first voltage. the measured value is called vthosd1. note58) reduce the sg6 input level gradually, monitoring output. measure the sg6 level when the output reaches 0v. the measured value is called vthosd2. note59) confirm that output signal is being blanked by the sg6 at the time. monitoring to output signal, decreasing the level of sg6. measure the top level of sg6 when the blanking period is disappeared. the measured value is called vthblk. note60) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31), and is treated as ohaj1. note61) measure the amplitude output at out(24,28,31). the measured value is called vout(24,28,31), and is treated as ohaj2. note62) confirm that output signal is being blanked by the sg7 at the time. monitoring to output signal, decreasing the level of sg7. measure the top level of sg7 when the blanking period is disappeared. the measured value is called vthret. 15
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 note63) the sync's amplitude of sg4 be changed all white into all black, increase from 0vp-p to 0.03vp-p. no pulse output permitted. note64) the sync's amplitude of sg4 be changed all white or all black, decrease from 0.3vp-p to 0.2vp-p. confirm no malfunction produced by noise. note65) measure the high voltage at syncout. the measured value is treated as vsh. note66) measure the low voltage at syncout. the measured value is treated as vsl. note67) syncout bec omes high with sink part of sg4. measure the time needed for the rear edge of sg4 sink to fall from 50 % and for syncout to rise from 50 % with an active prove. the measured value is treated as tds-f ,less than 90nsec. note68) measure the time needed for the rear edge of sg4 sink to rise from 50 % and for syncout to fall from 50 % with an active prove. the measured value is treated as tds-r ,less than 90nsec. note69) no input at the vcc of 12v when same condition by note2 . measure the ac current at vcc(5v). the measured value is treated as iccps. note70) the vcc of 12v be changed all white into all black, increase from 12v to 0v. measure the dc voltage at the vcc when no output signal at r, g and bout. the measured value is treated as skv. 16 pedestal voltage sync (50 % ) sg4 syncout tds-r tds-f (50 % )
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 17 pulse with amplirude of 0.7vp-p ( f =30khz). video width of 25us. (75 % ) sg no. input signal sg1 video signal (all white) sg2 video signal (step wave) sg3 sine wave (for freq. char.) sg4 videosignal (all white,all black) sg5 clamp pulse sg6 osd pulse sg7 blk pulse 8us 33us 0.5us 5us 0.7v pp 0.7v p-p (amplitude is partially variable.) 0.7v p-p 0.3v pp 5v ttl 5v ttl 5v ttl sine wave amplitude of 0.7vp-p. f=1mhz,50mhz,200mhz(variable) video width of 25us. (75 % ) sync's amplitude is variable. pulse width and amplitude are variable. amplitude is partially variable. amplitude is partially variable. *)f=30khz 3us 5us all white or all black variable.
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 test circuit 18 + + +
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 1 2 3 4 osd in (r) osd in (b) osd in (g) 19 terminal description no. name peripheral circuit remark dc voltage 6 9 11 2.5 2.5v 0.3ma cp 2k 2k input (r) input (b) input (g) clamped to about 2.5 v due to clamp pulses from pin 19. input at low impedance. input pulses (v) main brightness 35k 1 it is recommended that the ic be used between pedestal voltage 2v and 3v. 0.5ma 1k 3.5v 2.0v 4.0 ~ 5v(light) 2.5 ~ 3v(half) 1.5v~gnd connected to gnd if not used. 5 osd blk in 1.7v ~ gnd 3.7 ~ 5v 0.4ma 5 r g b 2.7 v input pulses connected to gnd if not used. 7 12 12 vcc vcc
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 10 15 19 26 14 nc s on g sep out 18 20 sync signal output pin, being of open collector output type. 3.2v 1k 500 13 input (s on g) 7 sync on video input pin. sync is negative. input signal at pin7 , compare with the reference voltage of internal circuit in order to separate sync signal from sync on green signal. when open 2.5v ~ ~ no. name peripheral circuit remark dc voltage (v) gnd gnd 8 16 clamp pulse in 2.2v 41k 19 0.15ma input pulses 0.5v input at low impedance. maximum 2.5~5v 17 vcc (5v)
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 3v 20 2k 50k 20 scl 3v 21 2k 50k 21 sda 21 scl of i c bus (serial clock line) v th =2.3v sda of i c bus (serial data line) v th =2.3v 2 2 no. name peripheral circuit remark dc voltage (v) abl in 2.5v 0.5ma 1.2k 1.2k 30k 20k 15 abl(automatic beam limitter) input pin. recommended voltage range is 0 to 5v. when abl function is not used, set to 5v. when open 2.5v 18 22 retrace blk in 2.25v 50k r g b 22 input pulses 0.5v connected to gnd if not used. maximum 2.5~5v
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 22 no. name peripheral circuit remark dc voltage (v) 25 50 vcc 2 12 impre - ssed 28 output (g) 31 output (r) 24 output (b) 50 used to supply power to output emitter follower only. a resistor is needed on the gnd side. set discretionally to maximum 15 ma, depending on the required driving capacity. variable 27 gnd (g) 30 gnd (r) 23 gnd (b) 0 gnd of rch, gch and bch 29 32
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 electrical chracteristics main contrast control characteristics 0 2 4 6 00h ffh main contrast control data sub contrast control characteristics sub contrast control data abl characteristics abl control voltage ( v dc ) osd adjust control characteristics osd adjust control data sub contrast : max 00h ffh 0 5 0h fh 23 brightness control characteristics brightness control voltage ( v dc ) 0 2 4 6 5 0 4 8 12 0.5 0 (video duty=75 % ) 1u 7 in 100k input amplitude(vp-p) sync separate normal operating range sync separate input min sync width 0 2 4 6 main contrast : max 0 2 4 6 main contrast : max sub contrast : max
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 notice of application make the nearest distance between output pin and pull down resister. recommended pedestal voltage of ic output signal is 2v. clamp pulse input clamp pulse width is recommended above 15 khz, 1.0 usec above 30 khz, 0.5 usec above 64 khz, 0.3 usec . the clamp pulse circuit in ordinary set is a long round about way, and beside high voltage, sometimes connected to external terminal, it is very easy affected by large surge. therefore, the fig. shown right is recommended. application method for M52746SP ~ 19 24
mitsubishi< linear ic > M52746SP mitsubishi bus controlled 3ch video pre-amp for crt display monitor 25 25 application example input (r) 110v 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 32 31 30 29 28 27 26 25 24 23 22 21 20 19 12v osd in (b) M52746SP 3.3u blk in (for osd) 5v sync sep out blk in (for retrace) 1k 0.01u input (b) 0.01u 3.3u 75 100k 0.01u osd in (g) osd in (r) 47u 0.01u 47u 0.01uu input (g) 3.3u 0.01u 75 47u clamppulse in 5v ttl 5v ttl 5v ttl 5v ttl 5v ttl crt 0~5v 0 ~ 5v sda scl abl in cut off adjj 1k 1k 1k 1u 75 nc 4.7u 0.01u 4.7u 0.01u 4.7u 0.01u dac ic 2.5v ttl 2.5v ttl 2.5v ttl s on g input

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