SAA6579 データシートの表示（PDF） - Philips Electronics
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SAA6579 Datasheet PDF : 16 Pages
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Philips Semiconductors
Radio Data System (RDS) demodulator
Product specification
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
SYMBOL
VDDA
VDDD
Itot
Vi(rms)
VOH
VOL
Tamb
PARAMETER
analog supply voltage (pin 5)
digital supply voltage (pin 12)
total supply current
RDS input amplitude (RMS value; pin 4)
HIGH level output voltage for signals RDDA, RDCL, QUAL and T57
LOW level output voltage for signals RDDA, RDCL, QUAL and T57
operating ambient temperature
MIN.
3.6
3.6
−
1
4.4
−
−40
TYP.
5.0
5.0
6
−
−
−
−
MAX. UNIT
5.5 V
5.5 V
−
mA
−
mV
−
V
0.4 V
+85 °C
ORDERING INFORMATION
TYPE
NUMBER
SAA6579
SAA6579T
NAME
DIP16
SO16
PACKAGE
DESCRIPTION
plastic dual in-line package; 16 leads (300 mil); long body
plastic small outline package; 16 leads; body width 7.5 mm
VERSION
SOT38-1
SOT162-1
1997 Feb 24
2
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