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CXA1145P Dataheets PDF



Part Number CXA1145P
Manufacturers Sony Corporation
Logo Sony Corporation
Description RGB Encoder
Datasheet CXA1145P DatasheetCXA1145P Datasheet (PDF)

SONY RGB Encoder . CXA1145P/M Description The CXA 1145P/M encoder converts an ana- log.RGB signal to a composite video signal. With its built-in circuit various pulses required for an encoder, composite video outputs are obtained just by inputting the composite sync and analog RGB signal. Features • Single power supply 5 V • Low power consumption (11 0 mWI • Compatible both with NTSC and PAL systems • Built-in 750 driver (RGB output, composite video output, composite sync output) • Built-in os.

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SONY RGB Encoder . CXA1145P/M Description The CXA 1145P/M encoder converts an ana- log.RGB signal to a composite video signal. With its built-in circuit various pulses required for an encoder, composite video outputs are obtained just by inputting the composite sync and analog RGB signal. Features • Single power supply 5 V • Low power consumption (11 0 mWI • Compatible both with NTSC and PAL systems • Built-in 750 driver (RGB output, composite video output, composite sync output) • Built-in oscillator for subcarrier • External input of subcarrier is also possible. • Built-in audio buffer circuit Functions • MTX circuit • R-Y, B-Y MOD circuit • Y/C MIX circuit • 750 driver for RGB, composite video and composite sync outputs • PAL ALT circuit • BF generator • Half H killer circuit • Subcarrier oscillator • Audio buffer circuit Structure Bipolar silicon monolithic IC Packa e Outline CXA1145P 24 pin DIP CXA1145M 24 pin SOP " Absolute Maximum Ratings (Ta = 25°C) • Supply voltage · • Operating temperature • Storage temperature • Allowable power dissipation Vee Topr Tstg Po Recommended Operating Condition 10 -20 to +75 -55 to +150 1250 780 • Supply voltage Vee 5±0.25 ovc oc mW (CXA 1145P) mW (CXA 1145MI v Unit: mm DIP-24P-01 SOP·24P-L01 -108- SONY reserves the right to change products and specifications without notice. This Information does not convey any license under patent rights of SONY corporation or others. 70945-TO CXA1145P/M Block Diagram and Pin Configuration CHROMA OUT y OUT CHROMA IN y IN C VIDEO OUT B OUT G OUT R OUT ·109- S O N Y.. C SYNC OUT C SYNC IN AUDIO OUT AUDIO IN NTSC/PAL IN B IN G IN R IN CXA1146P/M Pin Description No. Symbol 1 GND 1 2 RIN 3 GIN 4 BIN SONY., Equivalent circuit ' 2 ® @) r/r k ) - ,___ l ~+ Description GND pin for circuits other than o~tputs of RGB and composite video. Connect with GND 2 using an impedance as low as possible. Input pin for the analog RGB signal. Input with 100% = 1 Vp-p. It is necessary to input with an impedance as low as possible to minimize the clamp error allowance. 6 XO OUT 5 t Ji'>r 6 XOIN 6 1 " ++ Pin for the x'tal OSC. For inner oscillation. a crystal oscillator is con· nected. For external oscillation, Input to pin 6 XO IN through a coupling capacitor. Input with the sub-carrier Input level at 400 mVp-p to 1,000 mVp-p. For external oscillation, input a sine wave with enough less distortion. With much distortion, the chroma signal's phase property may de· teriorate. . 7 NTSC/PAL IN 7 . I ,...,. jJ I Switching pin between NTSC and PAL mode. J Vee NTSC I GND PAL ·110- CXA1145P/M No. Symbol Equivalent circuit S O N Y.. Description 8 AUDIO IN 8 ;;7 JJ Input pin for the audio buffer circuit. I The input impedance is about 25 kQ ;;7 9 AUlD OUT ~~ 9 r,7 Output pin for the audio buffer circuit. 10 C SYNC IN 10 ~ 7j Input pin for the composite sync signal. Input with the TTL level. L (;;> 0.8 V): Sync. H (~ 2.0 V) 11 C SYNC OUT 11 r 7i'7 12 Vee 1 Output pin for the composite sync signal. Capable of driving a 750 load direct. Power supply pin for circuits other than RGB and composite video output circuits. -111- CXA1145P/M No. Symbol Equivalent circuit SONY., Description ~ 13 I REF 13 r~ ~ (' Pin to determine the inner reference current. Connect to GND via a 27 kO resistor. 7i'T ~ 14 VREF 14 Pin for the inner reference voltage. Connect to GND with 10 ,.F. I £;;'r T. 15 C OUT 15 1r- £7i'T Chroma signal output pin. Connect a Band Pass Filter (BPF) between this pin and pin 17 (C IN). 1r- Y signal output pin. 16 Y OUT 16 Connect a delay line between this pin and pin 18 (YIN). I £--;;'r J 17 CIN 17 l7i ~ 7tT Input pin for the chroma signal without harmonic distortion after BPF. -112- CXA1145P/M No. Symbol Equivalent circuit SONY~ Description 18 YIN 19 Vcc2 18 ,~,. Input pin for the Y signal with delay after the delay line. + Power supply pin for RG8 and composite video output circuits. Decouple with a large·enough capacity as a massive current flows. 20 C VOUT ~ 19 • :r.lr l ... Output pin for the Y/C MIX circuit. The composite video signal is output. This output can drive a 750 load direct. 21 8 OUT 22 GOUT 23 ROUT 24 GND2 .~ 1 @ @ 7:7 .) Output pin for the analog RG8 signal. Capable of driving a 750 load drive. I '"" GND pin for RG8 and composite output circuits. Connect with GND 1 using low impedance as possible. -113- CXA1145P/M SONY., Electrical Characteristics Ta = 25°C, Vee= 5V, See the Electrical Characteristics Test Circuit Item Consumption current 1 Symbol Conditions lcc1 S1 S2 S3 ON Test point 11 Min. 15.0 Consumption current 2 lcc2 SG5 DC=2. OV I 2 6.3 VoiR) RIN = 1Vp-p, f = 200 kHz, Fig. 1 F RGB output voltage Vo(G) GIN=1Vp-p, !=200kHz, Fig. 1 E 0.64 VoiB) BIN= 1Vp-p, f =200kHz, Fig, 1 D RGB output frequency response fciR) 1---- - fciG) fciB) Frequency when an output becomes -3 dB with the output of f = 200 kHz in Fig. 1 set to 0 dB..


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