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TDA8446 Datasheet(PDF) 4 Page - NXP Semiconductors |
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TDA8446 Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 16 page 1995 Feb 16 4 Philips Semiconductors Product specification Fast RGB/YC switch for digital decoding TDA8446 PINNING SYMBOL PIN DESCRIPTION DIP20 SO28 SOUT 1 1 synchronization signal output; this output provides the synchronization information extracted from the incoming signal at pin 2 (SIN). SIN 2 2 synchronization signal input; CSYNC or CVBS signal from the peri-connector CCL 3 3 clamping capacitor connection; the clamping pulse is generated by external circuitry connected to this pin, the generated pulse clamps the RGB inputs. n.c. − 4 not connected CLO 4 5 clamping pulse output n.c. − 6 not connected BIN 5 7 B-signal input GIN 6 8 G-signal input RIN 7 9 R-signal input SW1 8 10 clamping control signal input; this TTL signal is used to select the clamp signal, a LOW level at this input forces the circuit to output the generated clamping pulse. n.c. − 11 not connected CLI 9 12 clamping pulse input; this TTL signal indicates the black level clamping period for the incoming Y signal (active-HIGH). CIN 10 13 chrominance signal input COUT 11 14 chrominance signal output YIN 12 15 luminance signal input; this input also accepts the CVBS signal FS 13 16 fast switching signal input; this signal is used to control fast switching of the luminance signals, a HIGH level at this input forces the circuit to output the internal Y signal. n.c. − 17 not connected n.c. − 18 not connected SW2 14 19 gain control signal input; this TTL signal is used to set the gain of the chrominance amplifiers (A), a LOW level at this input forces the gain A to 6 dB (HIGH forces to 0 dB). n.c. − 20 not connected −(R-Y) 15 21 −(R−Y) signal output YOUT 16 22 luminance signal output −(B−Y) 17 23 −(B−Y) signal output n.c. − 24 not connected n.c. − 25 not connected VCC 18 26 positive supply voltage (+12 V) VINT 19 27 internal decoupling VEE 20 28 ground |
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