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RDS Demodulator IC
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Digital Demodulator and Outputs – QUAL, RDDA, T57, OSC2, RDCL
High level output
V
OH
I
Q
=-20µA, DV
DD
=4.5V
4.4
-
-
voltage
Low level output
V
OL
I
Q
=3.2mA, DV
DD
=5.5V
-
-
0.4
voltage
Nominal clock
f
RDCL
RDCL
-
1187.5
-
frequency
RDCL jitter
t
RDCL
-
-
-
18
Nominal subcarrier
T57
fT57
-
57.0
-
frequency
(see Note 1)
OSC2
1.5
-
-
DV
DD
=4.5V, V
14
=0.4V
OSC2
-1.6
-
-
DV
DD
=4.5V, V
14
=4.1V
Output current
I
O
QUAL, RDDA, T57, RDCL
5.9
-
-
DV
DD
=4.5V, V
14
=0.4V
QUAL, RDDA, T57, RDCL
-5.3
-
-
DV
DD
=4.5V, V
14
=4.1V
4.332 MHz Crystal Parameter
Crystal frequency
f0
-
-
4.332
-
Maximum permitted
fmax
-
±50
-
tolerance
f0 adjustment
Ta=25℃
-
-
±20
f0
tolerance
Ta=-40 to +85℃
-
-
±25
Load capacitance
CL
-
30
-
Resonance
Rxtal
-
-
60
resistance
8.664 MHz Crystal
Crystal frequency
f0
-
-
8.664
-
Maximum permitted
fmax
-
±50
-
tolerance
Ta=25℃
-
-
±30
f0 adjustment
f0
tolerance
Ta=-40 to +85
℃
-
-
±30
Load capacitance
CL
-
30
-
Resonance
Rxtal
-
-
60
resistance
Note:
The signal T57 has a phase lead of 123° (±180°) relative to ARI carrier at output SCOUT.
PT2579
Unit
V
V
Hz
µs
KHz
mA
mA
mA
mA
MHz
10
-6
10
-6
10
-6
pF
Ω
MHz
10
-6
10
-6
10
-6
pF
Ω
PT2579 V1.6
-8-
May, 2008
PTC [ PRINCETON TECHNOLOGY CORP ]
