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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 www.DataSheet4U.com • 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
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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
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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.
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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.
47 : CLAMP1 37 : CLAMP2
Clamp Filter
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.
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This pin is for output of the 1bit DAC of the bus signal. This pin can source a maximum current of 2.0mA.
31 : O3
O3
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 : .