PRELIMINARY DATA SHEET
Bi-CMOS INTEGRATED CIRCUIT
µ
PC2539
RDS DATA DEMODULATOR IC
The
µ
PC2539 is data demodulator IC for FM receiver applying to Radio Data System in European countries and
Radio Broadcasting Data System in USA.
This IC carries out to extract 57kHz RDS signal from FM multiplex signal, demodulate data-stream, recover
bit-rate-clock, and discriminate SK signal in ARI system.
FEATURES
•
•
•
•
•
Adjustment-free
Built-in 57kHz band-pass-filter consist of switched capactiors.
High sensitivity.
Employing digital PLL.
Small outline plastic package
ORDERING INFORMATION
Part Number
Package
24-pin plastic SOP (300 mil)
µ
PC2539GS
BLOCK DIAGRAM
24
23
22
21
20
19
18
17
16
15
14
13
57kHz BPF
COSTAS
BIPHASE
DECODER
SK DET
DIFFERENTIAL
DECODER
CLOCK
RECOVERY
OSC
1
2
3
4
5
6
7
8
9
10
11
12
The information in this document is subject to change without notice.
Document No. S11570EJ1V0DS00 (1st edition)
Date Published May 1996 P
Printed in Japan
©
1996
µ
PC2539
PIN CONFIGURATION (Top View)
V
DD
TEST1
TEST2
CLK OUT
DATA OUT
RDS IND
SK IND
TEST3
TEST4
DGND
OSC IN
OSC OUT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
TEST9
TEST8
TEST7
BPF IN
REF
BPF OUT
DSB IN
AGND
OP. CTL
TEST6
TEST5
2
µ
PC2539
PIN FUNCTIONS
Pin no.
1
2
3
4
5
6
Pin name
V
DD
TEST1
TEST2
CLK OUT
DATA OUT
RDS IND
Power Supply for Digital Circuit
Pin for Test : Normally connect to GND.
Pin for Test : Normally be open.
Bit-Rate-Clock Output Pin
RDS Data Output Pin
RDS Idenrification Indicator : When RDS signal is detected, the output voltage becomes
to Low level.
SK Identification Indicator : When SK signal is detected, the output voltage becomes to
Low level.
Pin for Test : Normally connect to GND.
Pin for Test : Normally connect to GND.
GND for Digital Circuit
Oscillator Input Pin
Oscillator Output Pin
Pin for Test : Normally be open.
Pin for Test : Normally connect to GND.
Operation/Stop control Pin : High:Operation mode, Low:Stop mode
GND for Analog Circuit
DSB Demodulator Input Pin
Band-Pass-Filter Output Pin
Reference Voltage for BPF
Band-Pass-Filter Input Pin
Pin for Test : Normally connect to GND.
Pin for Test : Normally connect to GND.
Pin for Test : Normally connect to GND.
Power Supply for Analog Circuit
Function
7
SK IND
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
TEST3
TEST4
DGND
OSC IN
OSC OUT
TEST5
TEST6
OP.CTL
AGND
DSB IN
BPF OUT
REF
BPF IN
TEST7
TEST8
TEST9
V
CC
3
µ
PC2539
ELECTRICAL SPECIFICATIONS (PRELIMINARY)
ABSOLUTE MAXIMUM RATINGS (Unless otherwise specified, T
A
=25
°
C)
Parameter
Supply voltage
Power dissipation
Operating ambient temperature
Storage temperature
Symbol
V
CC
Pd
Topt
Tstg
Conditions
V
CC
pin, V
DD
pin
T
A
=85°C
Ratings
7.0
280
–30 to +85
–40 to +125
Unit
V
mW
°C
°C
Caution
Exposure to Absolute Macimum Rating for extended periods may affect device reliability;
exceeding the ratings could cause permanent damage. The parameters apply independently.
RECOMMENDED OPERATING CONDITIONS
Parameter
Sypply voltage
FM Demoulation Signal
Input Voltage
Symbol
V
CC
Vin
Conditions
V
CC
pin, V
DD
pin
MONO,
∆f=75kHz
MIN.
4.5
TYP.
5.0
280
MAX.
5.5
Unit
V
mVrms
ELECTRICAL CHARACTERISTICS (Unliss otherwise specified, T
A
=25
°
C, V
CC
=V
DD
=5.0V)
Parameter
Circuit current
SK Detection Sensitivity(ON)
SK Detection Sensitivity(OFF)
RDS Detection Sensitivity
SK Lock Up Time
RDS Lock Up Time 1
RDS Lock Up Time 2
Output Voltage(H Level)
Symbol
I
CC
Ssk1
Ssk2
Srds
Tsk
Trds1
Trds2
VOH
No Signal
SK ONLY
SK ONLY
RDS ONLY, DATA(101010..)
SK ONLY, Vsk=10mVrms
RDS ONLY
RDS+SK, Vsk=10mVrms
Io=±100
µ
A, Pin 4, 5, 6
Io=±5
µ
A, Pin 7
Output Voltage(L Level)
VOL
Io=±100
µ
A, Pin 4, 5, 6
Io=±5
µ
A, Pin 7
Band-Pass-Filter Characteristics
Peak Gain
Pass Band Width
Attenuation 1
Attenuation 2
Maximum Input Level
Signal to Noise Ratio
Input Impedance
Output Impedance
Av
BW
ATT1
ATT2
Vinmax
S/N
Zin
Zout
fin=57kHz, Vin=10mVrms
Av-3dB
fin=53kHz, Vin=10mVrms
fin=38kHz, Vin=10mVrms
fin=57kHz
fin=57kHz, Vin=3mVrms
22
2.8
23
75
120
25
26
–
25
3.3
27
85
150
30
35
300
28
3.8
31
–
–
–
44
660
dB
kHz
dB
dB
mVp-p
dB
kΩ
Ω
Conditions
MIN.
10
2.5
1.0
0.1
12
10
20
4.90
4.90
–
–
TYP.
15
3.5
2.0
0.2
16
40
50
4.95
4.95
0.05
0.05
MAX.
20
4.5
3.0
0.6
20
80
100
–
–
0.10
0.10
Unit
mA
mVrms
mVrms
mVrms
bit
bit
bit
V
V
V
V
4
µ
PC2539
TIMING CHART OF DATA OUTPUT AND CLOCK OUTPUT
DATA OUTPUT
(From pin5)
CLOCK OUTPUT
(From pin4)
210.5
µ
s
±10
µ
s
421.5
µ
s
±10
µ
s
210.5
µ
s
±10
µ
s
5
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