ta8851bng,TA8851CNG 2005-09-05 1 toshiba bipolar linear integrated circuit silicon monolithic ta8851bng,TA8851CNG audio / video switch ic for tv with s-terminals the ta8851bng / cng is an a / v switch ic, which has 7 input channels and 2 output channels. because the 2 output channels can be switched independently of each other, the ta8851bng / cng allows you to configure a pip system input switching circuit easily. the ta8851bng / cng can be interfaced easily to a microcontroller via the i 2 c bus. 3 of 7 input channels can be used for y / c separated input. features video stage ? input composite video input : 7 channels y / c input : 3 channels ? output composite video output : 2 channels (main and sub) y / c output : 2 channels (main and sub) audio stage ? input l / r input : 7 channels ? output l / r output : 3 channels (2 of 3 depend on video, and the other is selectable from main or sub) functions ? i 2 c bus interface ? external mute circuit ? dac output (3 outputs) ? video clamp circuit ? mode output ? adc input (4 inputs) weight: 5.44 g (typ.)
ta8851bng,TA8851CNG 2005-09-05 2 block diagram ta8851bng
ta8851bng,TA8851CNG 2005-09-05 3 block diagram TA8851CNG
ta8851bng,TA8851CNG 2005-09-05 4 terminal connection diagram
ta8851bng,TA8851CNG 2005-09-05 5 terminal function pin no. pin name function interface circuit 2 : v in e2 5 : v in e1 composite video signal input these pins are for composite video signal input. the recommendable input level is 1.0v p-p . 50 : v in e3 53 : v in e4 composite video signal / y signal input these pins can be used for composite video signal or y signal input. the recommendable input level is 1.0v p-p . 7 : v in s1 13 : v in s2 19 : v in s3 composite video signal input and s-mode switch these pins are for composite video signal input and s mode switch. by setting dc voltage of one of these pins lower than 2.6v, that channel (s1, s2 or s3) turns to s-mode. and when it is higher than 2.6v, that pin is for composite video input. the recommendable input level is 1.0v p-p .
ta8851bng,TA8851CNG 2005-09-05 6 pin no. pin name function interface circuit 9 : y in s1 15 : y in s2 21 : y in s3 11 : c in s1 17 : c in s2 23 : c in s3 y signal input / c signal input these pins accept a y signal from the s-terminal and a c signal as input. the recommended input signal level is 1.0v p-p for y signal and 300mv p-p for c signal (burst). 4 : l in e1 6 : r in e1 audio input (tv) these pins accept the sound of the internal tv signal as input. the signal input to this pin is output from the main / sub output after being selected, as well as from the tv audio output terminal. the recommended input signal level is 300mv rms . 52 : r in e4 54 : l in e4 audio input / adc input these pins accept an audio signal as input. they also accept input from a 1bit adc. in this case, if the voltage on these pins is below 2.3v the adc outputs i 3 and i 4 become logic is. the recommended input signal level is 300mv rms . 8 : l in s1 10 : r in s1 14 : l in s2 16 : r in s2 20 : l in s3 22 : r in s3 1 : l in e2 3 : r in e2 51 : l in e3 49 : r in e3 audio input these pins accept an audio signal as input. the recommended input signal level is 300mv rms .
ta8851bng,TA8851CNG 2005-09-05 7 pin no. pin name function interface circuit 25 : mute mute if the voltage on this pin is above 1.5v, all audio outputs (main, sub, and tv) are disabled. 46 : v out 1 36 : v ou t2 monitor output these pins output the selected composite signal. the standard output signal amplitude is 2.0v p-p . these pins can sink a maximum current of 3.0ma. 47 : clamp1 37 : clamp2 clamp filter these pins are a filter terminal for the clamp circuit to maintain the monitor output at a constant dc level. if these pins are tied to gnd, the clamp circuit is disabled, so that the dc voltage of the monitor output cannot be clamped to a constant level. 48 : y in 1 40 : c in 1 38 : y in 2 30 : c in 2 comb y / c input these pins accept a y / c separated signal from the comb filter as input. the recommended input signal level is 2.0v p-p for y signal and 600mv p-p for c signal (burst).
ta8851bng,TA8851CNG 2005-09-05 8 pin no. pin name function interface circuit 44 : y out 1 42 : c out 1 34 : y out 2 32 : c out 2 y / c output these pins output the y and c signals that are fed to the v / c / d circuits. the standard output signal level is 2.0v p-p for y signal and 600mv p-p for c signal (burst). these pins can sink a maximum current of 2.5ma. 28 : i / o1 29 : i / o2 i / o these pins are for input and output to and from the 1bit dac / adc of the bus signal. these pins can source a maximum current of 2.0ma. 31 : o3 o3 this pin is for output of the 1bit dac of the bus signal. this pin can source a maximum current of 2.0ma. 26 : sda 27 : scl scl / sda these pins are for input of the i 2 c bus. 33 : r out 2 35 : l out 2 39 : r out d / r out tv 41 : l out d / l out tv 43 : r out 1 45 : l out 1 audio output these pins output an audio signal. these pins can sink a maximum current of 1.4ma.
ta8851bng,TA8851CNG 2005-09-05 9 address map (slave address 90h, 91h) mode data no. data data 1 d 07 d 06 d 05 d 04 d 03 d 02 d 01 d 00 ta8851bng sound mute (1) (1) (1) TA8851CNG ? dac output (0) (1) (1) dual sound output (1) sound mute (1) (1) d 17 d 16 d 15 d 14 d 13 d 12 d 11 d 10 data 2 (main) f.video (0) d 27 d 26 d 25 d 24 d 23 d 22 d 21 d 20 write data 3(sub) y / c output switching (0) (0) (0) (0) f.video (0) output switching (0) (0) (0) d 37 d 36 d 35 d 34 d 33 d 32 d 31 d 30 read data 4 adc ident (0) (0) (0) (0) s input ident (0) (0) (0) p.o.r (1) f.video : forced video mode p.o.r : power on reset (power : on (1)) (0) (1) : preset
ta8851bng,TA8851CNG 2005-09-05 10 write mode output switching (main) bus data s input output signal mode d 13 d 12 d 11 d 10 is1 is2 is3 v out 1 r out 1 l out 1 e1 ? 1 1 1 ? ? ? v in e1 r in e1 l in e1 e2 D 1 1 0 ? ? ? v in e2 r in e2 l in e2 e3 D 1 0 1 ? ? ? v in e3 r in e3 l in e3 e4 D 1 0 0 ? ? ? v in e4 r in e4 l in e4 v 0 0 v in s1 1 ? s1 s ? 0 1 1 1 ? ? y in s1 + c in s1 r in s1 l in s1 v 0 0 v in s2 1 ? s2 s ? 0 1 0 ? 1 ? y in s2 + c in s2 r in s2 l in s2 v 0 0 v in s3 1 ? tv s3 s ? 0 0 1 ? ? 1 y in s3 + c in s3 r in s3 l in s3 mute ? 0 0 0 ? ? ? mute mute mute output switching (sub) bus data s input output signal mode d 23 d 22 d 21 d 20 is1 is2 is3 v out 2 r out 2 l out 2 e1 ? 1 1 1 ? ? ? v in e1 r in e1 l in e1 e2 ? 1 1 0 ? ? ? v in e2 r in e2 l in e2 e3 ? 1 0 1 ? ? ? v in e3 r in e3 l in e3 e4 ? 1 0 0 ? ? ? v in e4 r in e4 l in e4 v 0 0 v in s1 1 ? s1 s ? 0 1 1 1 ? ? y in s1 + c in s1 r in s1 l in s1 v 0 0 v in s2 1 ? s2 s ? 0 1 0 ? 1 ? y in s2 + c in s2 r in s2 l in s2 v 0 0 v in s3 1 ? tv s3 s ? 0 0 1 ? ? 1 y in s3 + c in s3 r in s3 l in s3 mute ? 0 0 0 ? ? ? mute mute mute output switching (dual sound output) : this table is only applied for TA8851CNG. bus data output signal mode d 02 r out tv l out tv main 1 r out 1 l out 1 tv sub 0 r out 2 l out 2
ta8851bng,TA8851CNG 2005-09-05 11 y / c output switching (main) bus data output signal mode d 17 d 16 d 15 d 14 y out 1 c out 1 s-terminal input 1 1 y in s1 to y in s3 (*1) video input except 1 0 v out 1 comb1 0 1 y in 1 y comb2 0 0 0 0 v in e3 ? s-terminal input 1 1 c in s1 to c in s3 (*2) video input 1 0 v out 1 c comb 0 1 ? ? ? c in 1 mute 0 0 ? ? mute mute * 1: sy1 switches between y in s1~y in s3 * 2: sc1 switches between c in s1~c in s3 y / c output switching (sub) bus data output signal mode d 27 d 26 d 25 d 24 y out 2 c out 2 s-terminal input 1 1 y in s1 to y in s3 (*1) video input except 1 0 v out 2 comb1 0 1 y in 2 y comb2 0 0 0 0 v in e4 ? s-terminal input 1 1 c in s1 to c in s3 (*2) video input 1 0 v out 2 c comb 0 1 ? ? ? c in 2 mute 0 0 ? ? mute mute * 1: sy2 switches between y in s1~y in s3 * 2: sc2 switches between c in s1~c in s3
ta8851bng,TA8851CNG 2005-09-05 12 mute mode video output sound output bus main sub main sub dual mode bit data pin 25 v out 1 y out 1 c out 1 v out 2 y out 2 c out 2 r out 1 l out 1 r out 2 l out 2 r out d l out d ext mute ? ? high level ? ? ? ? mute mute mute main d 00 1 ? ? ? ? ? mute ? ? sub d 01 1 ? ? ? ? ? ? mute ? sound mute sw tv (*) d 02 1 ? ? ? ? ? ? ? mute main d 10 d 11 d 12 0 0 0 ? mute ? ? ? mute ? ? sub d 20 d 21 d 22 0 0 0 ? ? ? mute ? ? mute ? y / c main d 14 d 15 0 0 ? ? mute ? ? ? ? ? bus line mute video & sound mute sw y / c sub d 24 d 25 0 0 ? ? ? ? mute ? ? ? *: tv mode is only applied for ta8851bng dac output dual sound selection bus bus output terminal bit data output terminal bit data r out d l out d 1 open i / o1 d 03 0 low level main 1 main sound main sound 1 open i / o2 d 04 0 low level sub d 02 0 sub sound sub sound 1 open o3 d 05 0 low level read mode s-output ident adc ident bus bus terminal input bit data terminal input bit data l 1 l 1 v in s1 h d 31 0 i / o1 h d 34 0 l 1 l 1 v in s2 h d 32 0 i / o2 h d 35 0 l 1 l 1 v in s3 h d 33 0 i3 h d 36 0 l 1 i4 h d 37 0
ta8851bng,TA8851CNG 2005-09-05 13 mode explanation |
