1 multimedia ics video signal switcher for av amplifiers BA7625 the BA7625 is a video signal switch that contains two five-channel analog multiplexers and wide-band 6db ampli- fiers.it designed for use in video cassette recorders. by simply adding transistor buffers to the outputs,it is possible to construct arecord / playback switch for two record / playback vcrs, and three video playback machines (eg.laser disk players). input switching and vcr record switching can be done independently. the BA7625 has sync-tip clamp inputs which are ideal for switching video signals. applications av amplifiers and video selectors features 1) 5-input / 3-output switches. 2) sync-tip clamp inputs. 3) built-in 6db amplifiers. 4) 5v supply voltage. absolute maximum ratings (ta = 25?) parameter symbol limits unit v cc 9v 500 * mw topr c tstg c pd ?25 ~ + 70 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * reduced by 5mw for each increase in ta of 1 c over 25 c.
2 multimedia ics BA7625 block diagram in5 1in1 ctl a v out1 v cc in2 ctl b v out 2 gnd gnd in4 ctl e ctl d 16 15 14 13 12 11 10 9 2 3 4 5 6 7 8 in3 ctl c logic logic 6db 6db monitor out truth table cde v out2 ll * in1 hl * lh * in3 h h l in4 h h h in5 cde v out1 ll * hl * in2 lh * in3 h h l in4 h h h in5 abe ll * in1 hl * in2 lh * in3 h h l in4 hhh in5 note 1: * indicates "don't care" (h or l). monitor out
3 multimedia ics BA7625 equivalent input / output circuits vcc q1 v1 + 2.7v i1 100 m a q2 q3 r1 200 200 r2 v in vcc q1 q2 58k o1 58k r2 r3 38k r4 r1 2k in vcc monout 17k r1 q1 q2 q3 q5 q4 100 r2 vcc v out1 v out 48k r1 i1 o1 dn 25bur i2 600 m a q2 q4 1.4ma 1.4ma q3 100 r2 q1 1v p-p dc 2.0v 2v p-p dc 0.5v 3.3v high level vcc = 5.0v 2.1v low level 2v p-p dc 0.5v in1 ~ in5 ctla ~ ctle monitor out v out1 , v out2 input circuit waveform
4 multimedia ics BA7625 electrical characteristics (unless otherwise noted, ta = 25? and v cc = 5v) parameter symbol min. typ. max. unit conditions v cc 4.5 5.0 5.5 v i cc 15.0 20.0 ma v om 2.6 2.9 v p-p f = 1khz, thd = 0.5% g v db f = mhz, v in = 1v p-p c t 65 45 db f = 4.43mhz, v in = 1v p-p ctm 35 25 db f = 4.43mhz, v in = 1v p-p g f ?3 0 db v th 2.2 3.3 v 10mhz / 1mhz, v in = 1v p-p 5.7 6.2 6.7 3 operating voltage supply current maximum output level voltage gain interchannel crosstalk mute level frequency characteristic ctl pin switch level s not designed for radiation resistance. measurement circuit sw 5 sw 4 v v v v v v v v v v v v v a logic logic 6db 6db 12 3 456 7 8 16 15 14 13 12 11 10 9 sw 5 sw 4 sw 3 1 2 3 75 105 monitor out 105 12 3 v cc v cc 1 2 3 75 105 1 2 3 75 105 105 sw e 12 3 sw d 23 105 75 105 1 1 v cc v out1 sw a sw 1 sw 2 sw b sw c v out2 2 3 1 23 105 75 105 1 v cc v cc 2 3 1 2 3 103 4.7 m v cc 105 fig.1
5 multimedia ics BA7625 measurement conditions sw 1 sw 2 sw 3 sw 4 sw 5 sw a sw b sw c sw d sw e i cc 3333322222 v om 1mon v om 2mon v om 3mon v om 4mon v om 5mon 2 3 3 2 3 3 2 3 3 2 3 3 2 3 2 3 2 2 3 3 2 2 2 * * * 3 2 g v 1mon g v 2mon g v 3mon g v 4mon g v 5mon 2 3 3 2 3 3 2 3 3 2 3 3 2 3 2 3 2 2 3 3 2 2 2 * * * 3 2 c t 1-2mon c t 1-3mon c t 1-4mon c t 1-5mon 2 3 3 3 3 2 3 2 2 3 2 2 2 * * * 3 2 c t 2-1mon c t 2-3mon c t 2-4mon c t 2-5mon 3 2 3 3 3 3 3 2 2 3 2 2 2 * * * 3 2 c t 3-1mon c t 3-2mon c t 3-4mon c t 3-5mon 3 3 2 3 3 3 2 2 2 3 3 2 2 * * * 3 2 c t 4-1mon c t 4-2mon c t 4-3mon c t 4-5mon 3 3 3 2 3 3 2 2 2 3 3 2 2 * * * 3 c t 5-1mon c t 5-2mon c t 5-3mon c t 5-4mon 3 3 3 3 2 3 2 2 2 3 3 2 2 * * * 2 g f 1mon g f 2mon g f 3mon g f 4mon g f 5mon 2 3 3 2 3 3 2 3 3 2 3 3 2 3 2 3 2 2 3 3 2 2 2 * * * 3 2 v om 2out1 v om 3out1 v om 4out1 v om 5out1 3 2 3 3 2 3 3 2 3 3 3 2 * * 2 3 2 2 3 2 2 2 * 3 2 parameter symbol switch settings measure- ment method current dissipation monitor out maximum output level monitor out voltage gain monitor out interchannel crosstalk monitor out frequency characteristic v out1 maximum output level note 1 note 2 note 3 note 4 note 1
6 multimedia ics BA7625 sw 1 sw 2 sw 3 sw 4 sw 5 sw a sw b sw c sw d sw e g v 2out1 g v 3out1 g v 4out1 g v 5out1 3 2 3 3 2 3 3 2 3 3 3 2 * * 2 3 2 2 3 2 2 2 * 3 2 c t 1-2out1 c t 1-3out1 c t 1-4out1 c t 1-5out1 2 3 3 3 3 * * 3 3 2 2 3 2 2 2 * 3 2 c t 2-1out1 c t 2-3out1 c t 2-4out1 c t 2-5out1 3 2 3 3 3 * * 3 3 2 2 3 2 2 2 * 3 2 c t 3-1out1 c t 3-2out1 c t 3-4out1 c t 3-5out1 3 3 2 3 3 * * 3 2 2 2 3 3 2 2 * 3 2 c t 4-1out1 c t 4-2out1 c t 4-3out1 c t 4-5out1 3 3 3 2 3 * * 2 3 3 2 3 3 2 2 * 2 c t 5-1out1 c t 5-2out1 c t 5-3out1 c t 5-4out1 3 3 3 3 2 * * 3 2 3 2 3 3 2 2 * 3 g f 2out1 g f 3out1 g f 4out1 g f 5out1 3 2 3 3 2 3 3 2 3 3 2 * * 2 3 2 2 3 2 2 2 * 3 2 v om 1out2 v om 3out2 v om 4out2 v om 5out2 2 3 3 2 3 3 3 2 3 3 2 * * 3 3 2 2 3 2 2 2 * 3 2 g v 1out2 g v 3out2 g v 4out2 g v 5out2 2 3 3 2 3 3 3 2 3 3 2 * * 3 3 2 2 3 2 2 2 * 3 2 parameter symbol switch settings measure- ment method v out2 maximum output level v out1 voltage gain v out1 interchannel crosstalk v out1 frequency characteristic v out2 voltage gain note 2 note 3 note 4 note 1 note 2
7 multimedia ics BA7625 sw 1 sw 2 sw 3 sw 4 sw 5 sw a sw b sw c sw d sw e c t 1-2out2 c t 1-3out2 c t 1-4out2 c t 1-5out2 2 3 3 3 3 * * 2 3 2 2 3 2 2 2 * 3 2 c t 2-1out2 c t 2-3out2 c t 2-4out2 c t 2-5out2 3 2 3 3 3 * * 3 3 2 2 3 2 2 2 * 3 2 c t 3-1out2 c t 3-2out2 c t 3-4out2 c t 3-5out2 3 3 2 3 3 * * 3 2 2 2 3 3 2 2 * 3 2 c t 4-1out2 c t 4-2out2 c t 4-3out2 c t 4-5out2 3 3 3 2 3 * * 3 2 3 2 3 3 2 2 * 2 c t 5-1out2 c t 5-2out2 c t 5-3out2 c t 5-4out2 3 3 3 3 2 * * 3 2 3 2 3 3 2 2 * 3 g f 1out1 g f 3out1 g f 4out1 g f 5out1 2 3 3 3 3 2 3 3 2 3 3 2 * * 3 3 2 2 3 2 2 2 * 3 2 ctm v out1 ctm v out2 2 3 3 3 3 * * 3 2 3 * v th a v th b v th c v th d v th e 2 3 2 3 3 3 2 3 2 3 3 2 3 1 3 * 2 3 1 * 2 * 1 3 * * 3 1 * * 1 parameter symbol switch settings measure- ment method note 1: connect a distortion meter to the output, and input a f = 1khz sine wave. adjust the input level until the output disto rtion is 0.5%. this output voltage at this time is the maximum output level v om (v p-p ). note 2: input a 1v p-p , 1mhz sine wave. the voltage gain (in db) is given by g v = 20 log (v out / v in ). note 3: input a 1v p-p , 4.43mhz sine wave. the interchannel crosstalk (in db) is given by c t = 20 log (v out / v in ) + 6. note 4: input 1v p-p , 1mhz and 10mhz sine waves. the frequency characteristic (in db) is given by g f = 20 log (v out (f = 10mhz) / v out (f = 1mhz) ). note 5: input a 1v p-p , 4.43mhz sine wave. the mute level is given by ctm = 20 log (v out / v in ) + 6 (db). note 6: input a 1v p-p , 1mhz sine wave. reduce the ctl pin voltage from v cc . the ctl pin switching level (v th ) is the ctl pin voltage at which the v out level drops below 10mv p-p . mute level v out2 interchannel crosstalk v out2 frequency characteristic ctl switching level note 3 note 4 note 5 note 6
8 multimedia ics BA7625 application example v out 1 1in1 monout front 75 w 2.2 m gnd in5 gnd in4 ctl e in3 ctl a v cc in2 ctl b ctl c 16 15 14 13 12 11 10 9 2 3 4 5 6 7 8 v out 2 ctl d 75 w 2.2 m 470 m 75 w 2.2 m 47 m 0.01 m a933 + 5.0v rear 75 w 2.2 m 75 w 2.2 m f / r ctl rec ctl aux 75 w 470 m 100 w v cc bs ld mon ctl 75 v cc 75 w 470 m v cc 100 w tv vtr out in1 vtr out in2 100 w fig.2 + + + + + + + + + external dimensions (units: mm) dip16 0.51min. 0.3 0.1 9 16 8 1 6.5 0.3 3.2 0.2 4.25 0.3 0.5 0.1 19.4 0.3 2.54 0 ~ 15 7.62
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