1) three 2-input / 1-output switches (one with sync- clamped inputs, the other two non-clamped). 2) 5v power supply. 3) low power consumption (62.5mw typ.). 4) excellent frequency characteristics (10mhz, 0db typ.). 5) wide dynamic range (clamped input: 2.9v p-p typ., non-clamped input: 3.0v p-p , typ.). 6) fast switching speed (50ns typ.). 1 multimedia ics video signal switcher ba7609 / BA7609F the ba7609 and BA7609F are switching ics developed for use in vcrs. each contains three two-channel analog multiplexers. as one of the switches has sync-tip clamp inputs and the other two have non-clamped inputs these ics are ideal for switching audio, video and chroma signals. applications video cassette recorders and televisions features block diagram 1 in2a 2 ctla 3 outa 4 gnd 5 outb 6 outc 7 ctlc 8 in2c 16 in1a 15 gnd 14 in2b 13 v cc s a s b 12 ctlb 11 in1b 10 gnd 9 in1c s c ctl l in2 h in1 output s a , s b : non-clamped input s c : clamped input
2 multimedia ics ba7609 / BA7609F absolute maximum ratings (ta = 25?) parameter symbol limits unit v cc 9v 500 * mw topr c tstg c pd 40 ~ + 85 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * reduced by 5.0mw for each increase in ta of 1 c over 25 c. equivalent circuits r3 13.6k r4 200 r5 33k r17 12k i1 0.6ma i2 0.3ma i4 0.6ma i5 1ma r7 100 r10 100 r11 100 r13 100 r14 100 r9 200 r6 20k r12 200 r16 200 r15 200 r2 2.2k r1 1k q4 q5 q7 q8 q10 q11 q12 q9 q3 q2 q1 out v cc in sa, sb
3 multimedia ics ba7609 / BA7609F sc r3 22k r8 25k r17 12k i1 0.6ma i2 0.3ma i4 0.6ma i5 1ma r7 100 r10 100 r11 100 r13 100 r14 100 r9 200 r12 200 r16 200 r15 200 r2 4k r1 1k q5 q6 q7 q8 q10 q11 q12 q9 q3 q2 q1 out v cc in r3 400 r4 400 r5 25k r2 200 q3 22 q1 q5 q6 q2 q4 ctl r6 25k r1 50k v cc i2 0.6ma i1 0.25ma i3 0.06ma ctl units : r = w
4 multimedia ics ba7609 / BA7609F 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 12.5 20.0 ma v om 2.6 2.9 v p-p v om 2.7 3.0 v p-p g v ?0.5 0 db 65 db g f ?3 0 db z in 14 20 26 k w thd 0.007 % v th 2.0 2.5 3.0 v c t 10mhz / 1mhz, v in = 1v p-p f = 1mhz, v in = 1v p-p f = 4.43mhz, v in = 1v p-p 0.5 1 non-clamped input f = 1khz, 1v p-p non-clamped input f = 1khz, thd = 0.5% non-clamped input f = 1khz, thd = 0.5% clamped input operating voltage supply current maximum output level 1 maximum output level 2 voltage gain interchannel crosstalk frequency characteristic input impedance total-harmonic distortion ctl pin switch level note: refer to the measurement circuit given in fig. 1. reference data pin dc voltages (reference values) 1 2.48 9 2.05 2 4.91 10 0 3 1.76 11 2.48 4 0 12 4.91 5 1.76 13 5.00 6 0.65 14 2.48 7 4.91 15 0 8 2.05 16 2.48 pin no. dc voltage dc voltage pin no. units: vdc electrical characteristics parameter 0.49 0.65 0.80 vdc 20k w 1.7m w 30 w min. typ. max. unit the input coupling capacitor values should be 0.1 m f to 1 m f. sync tip clamp level input impedance (no clamp) input impedance (with clamp) output impedance
5 multimedia ics ba7609 / BA7609F measurement circuit 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 v v v v v v v v v v v v a v cc v cc s 2b s 3b s 1b 47 / 16 223 osc v cc v outa v outb v outc v cc osc osc osc 50 w 50 w 1 1 2 2 3 3 12 3 105 105 105 s 1c s 2c s 3c s 3a s 2a s 1a 50 w 50 w 50 w 50 w 105 105 105 105 105 105 105 105 12 3 12 3 12 3 1 123 23 123 105 fig.1
6 multimedia ics ba7609 / BA7609F measurement conditions s 1a s 2a s 3a s 1b s 2b s 3b s 1c s 2c s 3c i cc 222222222 i n2a i n1b i n2b i n1c i n2c v om v om v om v om v om v om 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 f = 1khz thd = 0.5% i n1a i n2a i n1b i n2b i n1c i n2c g v g v g v g v g v g v 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 i n1a i n2a i n1b i n2b i n1c i n2c c t c t c t c t c t c t 2 3 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 2 3 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 2 3 2 2 2 2 3 2 2 2 2 2 2 3 f = 4.43mhz v = 1v p-p i n1a i n2a i n1b i n2b i n1c i n2c g f g f g f g f g f g f 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 2 3 2 2 2 2 2 3 v = 1v p-p ctla ctlb ctlc v th v th v th 3 2 2 2 2 2 1 2 2 2 3 2 2 2 2 2 1 2 2 2 3 2 2 2 2 2 1 i n1a i n2a i n1b i n2b z in z in z in z in 1 2 2 2 2 1 2 2 2 3 2 2 2 2 1 2 2 2 2 1 2 2 2 3 2 2 2 2 2 2 2 2 2 2 2 2 i n1a i n2a i n1b i n2b thd thd thd thd 3 2 2 2 2 3 2 2 2 3 2 2 2 2 3 2 2 2 2 3 2 2 2 3 2 2 2 2 2 2 2 2 2 2 2 2 f = 1mhz v = 1v p-p i n1a f = 10mhz f = 1mhz note 1 note 2 note 3 note 5 note 4 note 6 note 7 parameter switch settings symbol measurement method current dissipation ammeter maximum output level voltage gain interchannel crosstalk frequency characteristic ctl pin switching level input impedance total-harmonic distortion 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 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 is given by c t = 20 log (v out / v in ). note 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)). note 5: 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 vout level drops below 20mv p-p . note 6: measure the input pin voltage v in50 when a current of dc50 m a is flowing into the input pin. measure the input pin open-circuit voltage. the input impedance is given by z = (v in50 - v in0 ) / 50 10 -6 [ w ]. note 7: input a 1v p-p , 1khz sine wave and measure the total-harmonic distortion of the output using a total-harmonic distortion meter.
7 multimedia ics ba7609 / BA7609F external dimensions (units: mm) ba7609 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 BA7609F sop16 dip16 0.4 0.1 1.27 0.15 0.15 0.1 0.3min. 4.4 0.2 6.2 0.3 0.11 1.5 0.1 1 16 10.0 0.2 8 9
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