Ordering number : EN6123B
LC72722PM
CMOS IC
Single-Chip RDS
Signal-Processing System IC
Overview
http://onsemi.com
The LC72722PM is a single-chip system IC that implement the signal processing required by the European
Broadcasting Union RDS (Radio Data System) standard and by the US NRSC (National Radio System Committee)
RBDS (Radio Broadcast Data System) standard. This IC include band-pass filter, demodulator, synchronization, and
error correction circuits as well as data buffer RAM on chip and perform effective error correction using a soft-decision
error correction technique.
Functions
•
Band-pass filter : switched capacitor filter (SCF)
•
Demodulator : RDS data clock regeneration and demodulated data reliability information
•
Synchronization : Block synchronization detection
(with variable backward and forward protection conditions)
•
Error correction : Soft-decision/hard-decision error correction
•
Buffer RAM : Adequate for 24 blocks of data (about 500ms) and flag memory
•
Data I/O : CCB interface (power on reset)
Features
•
Error correction capability improved by soft-decision error correction
•
The load on the control microprocessor can be reduced by storing decoded data in the on-chip data buffer RAM.
•
Two synchronization detection circuits provide continuous and stable detection of the synchronization.
•
Data can be read out starting with the backward-protection block data after a synchronization reset.
•
Fully adjustment free
Specifications
•
Operating power-supply voltage :
•
Operating temperature :
•
Package :
4.5 to 5.5V
-40 to +85°C
MFP24(375mil)
•
CCB is ON Semiconductor® ’s original format. All addresses are managed
by ON Semiconductor® for this format.
•
CCB is a registered trademark of Semiconductor Components Industries, LLC.
Semiconductor Components Industries, LLC, 2013
June, 2013
60612HK B8-9103,8341/51202AS(OT)/83199TH(OT) No. 6123-1/18
LC72722PM
Specifications
Absolute Maximum Ratings
at Ta = 25°C, Vssd = Vssa = 0V
Parameter
Maximum supply voltage
Symbol
Vddmax
Vin1max
Maximum input voltage
Vin2max
Vin3max
Vo1max
Maximum output voltage
Vo2max
Vo3max
Io1max
Maximum output current
Io2max
Io3max
Allowable power dissipation
Operating temperature
Storage temperature
Pdmax
Topr
Tstg
Vddd, Vdda
CL, DI, CE, SYR, T1, T2, T3, T4, T5, T6, T7, SYNC
XIN
MPXIN, CIN
DO, SYNC, RDS-ID, T3, T4, T5, T6, T7
XOUT
FLOUT
DO, T3, T4, T5, T6, T7
XOUT, FLOUT
SYNC, RDS-ID
(Ta≤85°C)
Pin Name
Ratings
-0.3 to +7.0
-0.3 to +7.0
-0.3 to Vddd+0.3
-0.3 to Vdda+0.3
-0.3 to +7.0
-0.3 to Vddd+0.3
-0.3 to Vdda+0.3
+6.0
+3.0
+20.0
175
-40 to +85
-55 to +125
Unit
V
V
V
V
V
V
V
mA
mA
mA
mW
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Allowable Operating Ranges
at Ta = -40 to 85°C, Vssd = Vssa = 0V
Parameter
Symbol
Vdd1
Supply voltage
Vdd2
Input high-level
voltage
Input low-level voltage
Output voltage
VIH
VIL
VO
VIN1
Input amplitude
VIN2
VXIN
Guaranteed crystal
Oscillator frequencies
Crystal oscillator
frequency
deviation
Data setup time
Data hold time
Clock low level time
Clock high level time
CE wait time
CE setup time
CE hold time
CE high-level time
Data latch change
time
tDC
Data output time
tDH
DO,CE
DO,CL
Differs depending on the value
of the pull-up resistor used.
0.46
0.46
μs
μs
XTAL
XIN
XIN, XOUT
CI≤120Ω (XS=0)
CI≤70Ω (XS=1)
TXtal
XIN, XOUT
fo=4.332MHz, 8.664MHz
Vddd
CL, DI, CE, SYR, T1, T2
Serial data hold voltage
2.0
0.7Vddd
0
6.5
0.3Vddd
6.5
f=57±2kHz
100% modulation composite
100
400
4.332
8.664
±100
0.75
0.75
0.75
0.75
0.75
0.75
0.75
20
1.15
1500
50
V
V
V
V
mVrms
mVrms
mVrms
MHz
MHz
ppm
μs
μs
μs
μs
μs
μs
μs
ms
μs
Pin Name
Vddd, Vdda
Conditions
Ratings
min
4.5
typ
5.0
max
5.5
Unit
V
CL, DI, CE, SYR, T1, T2
DO, SYNC, RDS-ID, T3,
T4, T5, T6, T7
MPXIN
tSU
tHD
tCL
tCH
tEL
tES
tEH
tCE
tLC
DI, CL
DI, CL
CL
CL
CE, CL
CE, CL
CE, CL
CE
No. 6123-2/18
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