1 multimedia ics video signal switcher ba7612n / ba7612f the ba7612n and ba7613f are three-channel analog multiplexers with built-in mute, 6db amplifier and 75 w driver. the ics designed for use in video cassette recorders, and feature a large dynamic range and wide operating fre- quency range. all inputs are terminated with 20k w (typ.) input impedance. applications video cassette recorders and televisions features 1) 3-input / 1-output switches. 2) built-in 6db amplifier and 75 w driver. 3) built-in mute. 4) large input impedance (20k w typ.). 5) wide operating supply voltage range (4.5v ~ 13.0v ba7612n) (4.5v ~ 9.5v ba7613f). 6) low power dissipation (103mw typ.). 7) excellent frequency characteristics (10mhz, 0db typ.). 8) wide dynamic range (3.5v p-p typ.). 9) low interchannel crosstalk ( ?65db typ., f = 4.43mhz). block diagram truth table mute 12345678 ctla ctlb in2 gnd in3 logic in1 v out v cc 6db amp 75 w driver ba7612n 1 2 3 4 8 7 6 5 in1 ctla ctlb in2 gnd in3 v cc v out ba7612f mute logic 75 w 6db out in1 h in2 h in3 h h mute l (open) l (open) l (open) l (open) ctl a ctl b
2 multimedia ics ba7612n / ba7612f absolute maximum ratings (ta = 25?) parameter symbol limits unit * 1 13.5 / * 2 10.0 v mw topr c tstg c pd v cc * 1 900 * 3 / * 2 550 * 4 ? 25 ~ + 75 ? 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * 1 ba7612n * 2 ba7612f * 3 reduced by 9mw for each increase in ta of 1 c over 25 c. * 4 reduced by 5.5mw for each increase in ta of 1 c over 25 c. electrical characteristics (unless otherwise noted, ta = 25? and v cc = 5v) parameter symbol min. typ. max. unit conditions v cc 4.5 13.0 v i cc 20.5 29.0 ma 3.0 3.5 v p-p f = 1khz, thd = 0.5 % ba7612f is max.9.5v g v db c t 65 db c f ? 3.0 0 db 14 20 26 k w v th-a 1.0 2.0 3.0 v v th-b 1.0 2.0 3.0 v 5.5 6.0 6.5 1.0 v om z in f = 4.43mhz, v in = 1.0v p-p f = 1mhz, v in = 1.0v p-p f = 10mhz / 1mhz, v in = 1.0v p-p operating voltage range supply current maximum output level voltage gain interchannel crosstalk frequency characteristic input impedance ctl pin switching level a ctl pin switching level b s not designed for radiation resistance.
3 multimedia ics ba7612n / ba7612f measurement circuit sw 1 50 w osc 1 m f 1 m f 1 2 sw 2 50 w osc 1 m f 1 m f 1 2 v sw 3 50 w osc 1 m f 1 m f 1 2 47 m f 1000 m 43 75 0.022 m f sw 4 v cc v cc p p 1 2 3 sw 5 v cc 1 2 3 1 2 3 4 5 6 7 8 logic mute 6db amp 75 w driver a fig. 1 ~ ~ ~ ~ + +
4 multimedia ics ba7612n / ba7612f measurement conditions sw 1 sw 2 sw 3 sw 4 sw 5 i cc 22222 i n1 i n2 i n3 v om v om v om 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 i n1 i n2 i n3 g v g v g v 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 i n1 ? i n2 i n1 ? i n3 i n1 ? mute i n2 ? i n3 i n2 ? mute i n3 ? mute c t c t c t c t c t c t 1 1 1 2 2 2 2 2 2 1 1 2 2 2 2 2 2 1 3 2 2 2 2 2 2 3 2 3 2 2 i n1 i n2 i n3 g f g f g f 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 ctla ctlb v th v th 2 2 2 1 1 2 1 3 3 1 f = 1khz thd = 0.5 % f = 1mhz, v = 1v p-p f = 4.43mhz, v = 1v p-p v = 1v p-p f = 10mhz / f = 1mhz, * 1 * 2 * 3 * 4 * 5 parameter symbol switch settings measurement method current dissipation ammeter maximum output level voltage gain interchannel crosstalk frequency characteristic ctl pin switching level * 1: connect a distortion meter to the output, and input a f = 1khz sine wave. adjust the input level until the output distortion is 0.5%. this output voltage at this time multiplied by 2 is the maximum output level v om (v p-p ). * 2: input a 1v p-p , 1mhz sine wave. the voltage gain is given by g v = 20 log (v out / v in ) + 6. * 3: input a 1v p-p , 4.43mhz sine wave. the interchannel crosstalk is given by c t = 20 log (v out / v in ). * 4: input 1v p-p , 1mhz and 10mhz sine waves. the frequency characteristic is given by g f = 20 log (v out (f = 10mhz) / v out (f = 1mhz)). * 5: input a 1v p-p , 1mhz sine wave. reduce the ctl pin voltage from v cc . the ctl pin switching level (vth) is the ctl pin voltage at which the v out level drops below 20mv p-p . electrical characteristic curves 123456 v cc = 9v v cc = 5v 6 5 4 3 2 1 0 f = 1khz v cc = 12v input voltage : v in (v) output voltage : v out (v) fig. 2 v in vs. v out caracteristics (f = 1khz) 8 6 4 2 0 ? 2 ? 4 ? 6 ? 8 1m 10m 100m 100k signal attenuate level : (db) frequency : (hz) v cc = 5v v in = 1v p-p fig. 3 frequency characteristics 1m 10m 100m 0 ? 20 ? 40 ? 60 ? 80 100k signal attenuate level : (db) frequency : (hz) v cc = 5v v in = 1v p-p fig. 4 interchannel crosstalk
5 multimedia ics ba7612n / ba7612f operation notes the output impedance is approximately 32 w . therefore, to ensure output matching, connect an external resistor of 43 w . external dimensions (units: mm) sip8 sop8 ba7612n ba7612f 10.5 0.5 1 8 2.54 3.5 0.5 1.3 0.8 0.6 0.3 0.1 2.8 0.2 19.3 0.2 1.2 5.8 0.2 0.4 0.1 1.27 0.15 0.3min. 0.15 0.1 0.11 6.2 0.3 4.4 0.2 5.0 0.2 85 4 1 1.5 0.1
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