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SAA6579 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. SAA6579
Description  Radio Data System RDS demodulator
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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SAA6579 Datasheet(HTML) 2 Page - NXP Semiconductors

 
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1997 Feb 24
2
Philips Semiconductors
Product specification
Radio Data System (RDS) demodulator
SAA6579
FEATURES
• Anti-aliasing filter (2nd order)
• Integrated 57 kHz band-pass filter (8th order)
• Reconstruction filter (2nd order)
• Clocked comparator with automatic offset compensation
• 57 kHz carrier regeneration
• Synchronous demodulator for 57 kHz modulated RDS
signals
• Selectable 4.332/8.664 MHz crystal oscillator with
variable dividers
• Clock regeneration with lock on biphase data rate
• Biphase symbol decoder with integrate and dump
functions
• Differential decoder
• Signal quality detector
• Subcarrier output.
GENERAL DESCRIPTION
The integrated CMOS circuit SAA6579 is an RDS
demodulator. It recovers the additional inaudible RDS
information which is transmitted by FM radio broadcasting.
The data signal RDDA and the clock signal RDCL are
provided as outputs for further processing by a suitable
decoder (microcomputer).
The operational functions of the device are in accordance
with the
“CENELEC EN 50067”.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VDDA
analog supply voltage (pin 5)
3.6
5.0
5.5
V
VDDD
digital supply voltage (pin 12)
3.6
5.0
5.5
V
Itot
total supply current
6
mA
Vi(rms)
RDS input amplitude (RMS value; pin 4)
1
−−
mV
VOH
HIGH level output voltage for signals RDDA, RDCL, QUAL and T57
4.4
−−
V
VOL
LOW level output voltage for signals RDDA, RDCL, QUAL and T57
−−
0.4
V
Tamb
operating ambient temperature
−40
+85
°C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
SAA6579
DIP16
plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
SAA6579T
SO16
plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1


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