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PRELIMINARY DATA SHEET
Bi-CMOS INTEGRATED CIRCUIT
PC2539
RDS DATA DEMODULATOR IC
The 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)
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
(c)
1996
PC2539
PIN CONFIGURATION (Top View)
VDD 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
VCC TEST9 TEST8 TEST7 BPF IN REF BPF OUT DSB IN AGND OP. CTL TEST6 TEST5
2
PC2539
PIN FUNCTIONS
Pin no. 1 2 3 4 5 6 Pin name VDD 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 VCC
3
PC2539
ELECTRICAL SPECIFICATIONS (PRELIMINARY)
ABSOLUTE MAXIMUM RATINGS (Unless otherwise specified, TA=25C)
Parameter Supply voltage Power dissipation Operating ambient temperature Storage temperature Symbol VCC Pd Topt Tstg Conditions VCC pin, VDD pin TA=85C 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 VCC Vin Conditions VCC pin, VDD pin MONO, f=75kHz MIN. 4.5 TYP. 5.0 280 MAX. 5.5 Unit V mVrms
ELECTRICAL CHARACTERISTICS (Unliss otherwise specified, TA=25C, VCC=VDD=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 ICC 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=100A, Pin 4, 5, 6 Io=5A, Pin 7 Output Voltage(L Level) VOL Io=100A, Pin 4, 5, 6 Io=5A, 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 k 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
PC2539
TIMING CHART OF DATA OUTPUT AND CLOCK OUTPUT
DATA OUTPUT (From pin5)
CLOCK OUTPUT (From pin4)
210.5 s 10 s
421.5 s 10 s
210.5 s 10 s
5
PC2539
APPLICATION CIRCUIT ESAMPLE
VCC=+5V INPUT +5V OPERATE STOP 4700pF 0.1 F 4700pF
24 23 22 21 20 19 18 17 16 15 14 13
100 F +
0.1 F
57kHz BPF COSTAS SK DET
BIPHASE DECODER DIFFERENTIAL DECODER CLOCK RECOVERY
OSC
1
2
3
4
5
6
7
8
9
10
11
12 4.332MHz *2
0.1 F
CLK OUT DATA OUT RDS IND SK IND
+5V RBDS *1 RDS
22pF
22pF
Notes 1.
Pin 7 does not have ability enough to drive LED directly because of internal serial resistor (10k) shown in following figure. In application for system with no ARI signal such as RBDS in USA, pin 7 is recommended to be connected with VDD.
2.
Crystal oscillation frequency tolerance : 100ppm
The equivalent circuit in pin 7
10k S K detector block 7
PLL block
6
PC2539
PACKAGE DRAWING
24 PIN PLASTIC SOP (300 mil)
24
13 detail of lead end
1 A
12 H
G
P
I
J
F
K
E
C D M
M
N
B
L
NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material condition.
ITEM A B C D E F G H I J K L M N P
MILLIMETERS 15.54 MAX. 0.78 MAX. 1.27 (T.P.) 0.40 +0.10 -0.05 0.10.1 1.8 MAX. 1.55 7.70.3 5.6 1.1 0.20 +0.10 -0.05 0.60.2 0.12 0.10 3 +7 -3
INCHES 0.612 MAX. 0.031 MAX. 0.050 (T.P.) 0.016 +0.004 -0.003 0.0040.004 0.071 MAX. 0.061 0.3030.012 0.220 0.043 0.008 +0.004 -0.002 0.024 +0.008 -0.009 0.005 0.004 3 +7 -3 P24GM-50-300B-4
7
PC2539
The application circuits and their parameters are for references only and are not intended for use in actual design-in's.
No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this document. NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC Corporation or others. While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices, the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or property arising from a defect in an NEC semiconductor device, customer must incorporate sufficient safety measures in its design, such as redundancy, fire-containment, and anti-failure features. NEC devices are classified into the following three quality grades: "Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on a customer designated "quality assurance program" for a specific application. The recommended applications of a device depend on its quality grade, as indicated below. Customers must check the quality grade of each device before using it in a particular application. Standard: Computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices in "Standard" unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact NEC Sales Representative in advance. Anti-radioactive design is not implemented in this product.
M4 94.11
8

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