TA8851BNG,TA8851CNG
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 I2C bus. 3 of 7 input channels can be used for Y / C separated input.
FEATURES
Video Stage * Input Composite video input Y / C input * Output Composite video output : Y / C output Audio Stage * Input L / R input * Output L / R output Functions * I2C bus interface * External mute circuit * DAC output (3 outputs) * Video clamp circuit * Mode output * ADC input (4 inputs) : 3 channels (2 of 3 depend on video, and the other is selectable from Main or Sub) : 7 channels : 2 channels 2 channels (Main and Sub) (Main and Sub) : : 7 channels 3 channels Weight: 5.44 g (Typ.)
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2005-09-05
TA8851BNG,TA8851CNG
BLOCK DIAGRAM
TA8851BNG
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TA8851BNG,TA8851CNG
BLOCK DIAGRAM
TA8851CNG
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TA8851BNG,TA8851CNG
TERMINAL CONNECTION DIAGRAM
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TA8851BNG,TA8851CNG
TERMINAL FUNCTION
PIN No. PIN NAME FUNCTION INTERFACE CIRCUIT
2 : VinE2 5 : VinE1
Composite Video Signal Input
These pins are for composite video signal input. The recommendable input level is 1.0Vp-p.
50 : VinE3 53 : VinE4
Composite Video Signal / Y Signal Input
These pins can be used for composite video signal or Y signal input. The recommendable input level is 1.0Vp-p.
7 : VinS1 13 : VinS2 19 : VinS3
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 1.0Vp-p.
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TA8851BNG,TA8851CNG
PIN No. PIN NAME FUNCTION INTERFACE CIRCUIT
9 : YinS1 15 : YinS2 21 : YinS3 11 : CinS1 17 : CinS2 23 : CinS3 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 1.0Vp-p for Y signal and 300mVp-p for C signal (burst).
4 : LinE1 6 : RinE1
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 300mVrms.
52 : RinE4 54 : LinE4
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 I3 and I4 become logic is. The recommended input signal level is 300mVrms.
8 : LinS1 10 : RinS1 14 : LinS2 16 : RinS2 20 : LinS3 22 : RinS3 1 : LinE2 3 : RinE2 51 : LinE3 49 : RinE3 Audio Input These pins accept an audio signal as input. The recommended input signal level is 300mVrms.
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TA8851BNG,TA8851CNG
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 : Vout1 36 : Vout2
Monitor Output
These pins output the selected composite signal. The standard output signal amplitude is 2.0Vp-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 : Yin1 40 : Cin1 38 : Yin2 30 : Cin2 Comb Y / C Input
These pins accept a Y / C separated signal from the comb filter as input. The recommended input signal level is 2.0Vp-p for Y signal and 600mVp-p for C signal (burst).
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TA8851BNG,TA8851CNG
PIN No. PIN NAME FUNCTION INTERFACE CIRCUIT
44 : Yout1 42 : Cout1 34 : Yout2 32 : Cout2 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 2.0Vp-p for Y signal and 600mVp-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 2 the I C bus.
33 : Rout2 35 : Lout2 39 : RoutD / RoutTV 41 : LoutD / LoutTV 43 : Rout1 45 : Lout1 Audio Output These pins output an audio signal. These pins can sink a maximum current of 1.4mA.
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TA8851BNG,TA8851CNG
ADDRESS MAP
MODE DATA No. Data 1 D07 D06 D05 D04 DATA D03 D02 D01 Sound Mute TA8851BNG -- TA8851CNG Write D17 Data 2 (main) D27 Data 3(sub) (0) D37 Read Data 4 (0) D26 D25 D24 (0) D34 (0) D16 D15 D14 D13 F.VIDEO (0) D23 F.VIDEO (0) D33 (0) D22 (0) D32 S Input Ident (0) D21 D20 (0) (1) (1) DAC Output (1) Dual Sound Output (1) D12 (1) (1) Sound Mute (1) D11 (1) D10 D00
(Slave address 90H, 91H)
Y / C Output Switching (0) (0) D36 D35
Output Switching (0) (0) D31 (0) D30 P.O.R (1)
ADC Ident (0) (0)
F.VIDEO : Forced video mode P.O.R : Power On reset (power : ON (1)) (0) (1) : preset
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Write mode Output switching (main)
MODE E1 E2 E3 E4 V S1 TV V S2 S V S3 S S D13 -- 0 1 -- 0 1 -- 0 1 -- -- 0 0 0 -- -- 0 0 1 -- -- 0 1 0 -- 0 1 1 BUS DATA D12 D11 1 1 1 1 1 1 0 0 D10 1 0 1 0 IS1 -- -- -- -- 0 -- 1 0 -- 1 0 -- 1 -- -- -- -- S INPUT IS2 -- -- -- -- IS3 -- -- -- -- Vout1 VinE1 VinE2 VinE3 VinE4 VinS1 YinS1 + CinS1 VinS2 YinS2 + CinS2 VinS3 YinS3 + CinS3 Mute RinS3 LinS3 RinS2 LinS2 RinS1 LinS1 OUTPUT SIGNAL Rout1 RinE1 RinE2 RinE3 RinE4 Lout1 LinE1 LinE2 LinE3 LinE4
Mute
Mute
Mute
Output switching (sub)
MODE E1 E2 E3 E4 V S1 TV V S2 S V S3 S S D23 -- -- -- -- 0 1 -- 0 1 -- 0 1 -- -- 0 0 0 -- -- 0 0 1 -- -- 0 1 0 -- 0 1 1 BUS DATA D22 D21 1 1 1 1 1 1 0 0 D20 1 0 1 0 IS1 -- -- -- -- 0 -- 1 0 -- 1 0 -- 1 -- -- -- -- S INPUT IS2 -- -- -- -- IS3 -- -- -- -- Vout2 VinE1 VinE2 VinE3 VinE4 VinS1 YinS1 + CinS1 VinS2 YinS2 + CinS2 VinS3 YinS3 + CinS3 Mute RinS3 LinS3 RinS2 LinS2 RinS1 LinS1 OUTPUT SIGNAL Rout2 RinE1 RinE2 RinE3 RinE4 Lout2 LinE1 LinE2 LinE3 LinE4
Mute
Mute
Mute
Output switching (Dual sound output) : This table is only applied for TA8851CNG.
MODE TV Main Sub BUS DATA D02 1 0 OUTPUT SIGNAL Rout TV Lout TV Rout1 Rout2 Lout1 Lout2
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Y / C output switching (main)
MODE S-terminal Input Y Video Input Comb1 Comb2 S-terminal Input C Video Input Comb Mute EXCEPT 0 1 1 0 0 0 1 0 1 0 -- -- Mute -- -- -- D17 BUS DATA D16 D15 1 1 0 0 OUTPUT SIGNAL D14 1 0 1 0 Yout1 YinS1 to YinS3 (*1) Vout1 Yin1 VinE3 CinS1 to CinS3 (*2) Vout1 Cin1 Mute -- Cout1
* 1: * 2:
SY1 switches between YinS1~YinS3 SC1 switches between CinS1~CinS3
Y / C output switching (sub)
MODE S-terminal Input Y Video Input Comb1 Comb2 S-terminal Input C Video Input Comb Mute EXCEPT 0 1 1 0 0 0 1 0 1 0 -- -- Mute -- -- -- D27 BUS DATA D26 D25 1 1 0 0 OUTPUT SIGNAL D24 1 0 1 0 Yout2 YinS1 to YinS3 (*1) Vout2 Yin2 VinE4 CinS1 to CinS3 (*2) Vout2 Cin2 Mute -- Cout2
* 1: * 2:
SY2 switches between YinS1~YinS3 SC2 switches between CinS1~CinS3
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TA8851BNG,TA8851CNG
Mute mode
BUS MODE BIT Ext Mute Main Sound Mute SW Sub TV (*) -- D00 D01 D02 D10 D11 D12 D20 D21 D22 D14 D15 D24 D25 DATA -- 1 1 1 0 0 0 High level -- -- -- PIN 25 VIDEO OUTPUT MAIN SUB Yout1 Yout2 Vout1 Vout2 Cout1 Cout2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- SOUND OUTPUT MAIN SUB Dual Rout1 Rout2 Rout D Lout1 Lout2 LoutD Mute Mute -- -- Mute -- Mute -- Mute -- -- Mute
Bus Line Mute
Main
--
Mute
--
--
--
Mute
--
--
Video & Sound Mute SW
Sub
0 0 0 0 0 0 0
--
--
--
Mute
--
--
Mute
--
Y/C main Y/C Sub
--
--
Mute
--
--
--
--
--
--
--
--
--
Mute
--
--
--
*:
TV mode is only applied for TA8851BNG
DAC output
TERMINAL BUS BIT D03 DATA 1 0 1 0 1 0 OUTPUT Open Low level Open Low level Open Low level
Dual Sound Selection
TERMINAL BUS BIT DATA 1 D02 SUB 0 Sub Sound Sub Sound OUTPUT RoutD Main Sound LoutD Main Sound
I / O1
MAIN
I / O2
D04
O3
D05
Read mode S-Output ident
TERMINAL INPUT L H L H L H BUS BIT D31 DATA 1 0 1 0 1 0
ADC ident
TERMINAL INPUT L H L H L H L H BUS BIT D34 DATA 1 0 1 0 1 0 1 0
VinS1
I / O1
VinS2
D32
I / O2
D35
VinS3
D33
I3
D36
I4
D37
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TA8851BNG,TA8851CNG
MODE EXPLANATION
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