PDF SAA7284GP Data sheet ( Hoja de datos )

Número de pieza	SAA7284GP
Descripción	Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems
Fabricantes	NXP Semiconductors
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No Preview Available ! INTEGRATED CIRCUITS DATA SHEET SAA7284 Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems Preliminary speciﬁcation File under Integrated Circuits, IC02 1996 Oct 24 1 page Philips Semiconductors Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems Preliminary speciﬁcation SAA7284 PINNING SYMBOL MUTE DOBM VDDA VSSA VRCA EXTR FMR OPR n.c. VROA VSSDAC n.c. OPL FML EXTL PORM PORA REMVE REMO SEYE SOFF VSSF1 VCLK VDDF1 VCONT MIXREF DQPSK COFF CEYE PKDET VROF IREF VRCF VDDF2 VSSF2 n.c. CLKLPF PIN SDIP52 QFP64(1) DESCRIPTION 1 57 active LOW mute input; function deﬁned by MUTEDEF (control bit in the I2C-bus register) 2 59 digital audio interface output that can be 3-stated via I2C-bus 3 61 analog supply voltage for the audio channels 4 62 analog ground connection for the audio channels 5 63 internal audio reference voltage buffer (high-impedance node) 6 2 external analog input to the right audio channel 7 3 FM sound input to the right audio channel 8 4 analog output from the right audio channel 9 and 10 9 and 10 not connected; left open-circuit in application 11 7 internal audio reference voltage buffer output 12 8 quiet ground connection to DACs 13 and 14 − not connected; left open-circuit in application 15 11 analog output from the left audio channel 16 12 FM sound input to the left audio channel 17 13 external analog input to the left audio channel 18 14 active LOW power-on reset mute input; mute cleared by setting silence bit HIGH in I2C-bus (internal pull-up) 19 15 power-on reset audio select input (internal pull-up) 20 16 carrier loop-ﬁlter connection 21 17 carrier loop-ﬁlter output 22 21 sine channel eye pattern output for monitoring 23 22 sine channel offset compensator capacitor output 24 23 demodulator ground connection 1 25 24 carrier loop VCO clock output for monitoring 26 25 demodulator supply voltage 1 27 27 carrier loop VCO control voltage input 28 28 mixer voltage reference or input when using differential DQPSK signal 29 29 DQPSK input signal 30 30 cosine channel offset compensator capacitor output 31 31 cosine channel eye pattern output for monitoring 32 34 AGC peak detector storage capacitor output 33 35 internal demodulator reference voltage buffered output 34 36 internal demodulator reference current output 35 37 internal demodulator reference voltage unbuffered output 36 38 demodulator supply voltage 2 37 39 demodulator ground connection 2 38 40 not connected; left open-circuit in application 39 41 clock loop-phase comparator output 1996 Oct 24 5 5 Page Philips Semiconductors Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems Preliminary speciﬁcation SAA7284 handbook, full pagewidth ERROR_COUNT ERROR_MAX YES NO Output is unchanged AM bit = LOW MUTEB pin = HIGH RSSF = 1 YES NO C4ov BIT = 0 NO Output is unchanged AM bit = LOW MUTEB pin = HIGH YES EXT or FM INPUT SWITCHED IN NO YES Output is unchanged AM bit = HIGH (1) MUTEB pin = LOW(1) When error_count is less than error_min, AM bit = LOW, MUTEB pin = HIGH SOUND APPLICATION DUAL MONO YES NO DUAL MONO MODE LEFT = RIGHT = M1 SELECTED YES NO Output is unchanged AM bit = LOW MUTEB pin = HIGH MGB465 Output is switched to FM input AM bit = HIGH MUTEB pin = LOW When error_count is less than error_min, the output is switched back to NICAM and AM bit = LOW, MUTEB pin = HIGH (1) Indicating that a mute may occur when user returns to NICAM source. Fig.4 Flow diagram showing SAA7284 automatic muting function. 1996 Oct 24 11 11 Page

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