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부품번호 | LC72720YV 기능 |
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기능 | Single-Chip RDS Signal-Processing System IC | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 18 페이지수
Ordering number : EN6488A
LC72720YV
CMOS IC
Single-Chip RDS
Signal-Processing System IC
http://onsemi.com
Overview
The LC72720YV 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 :
3.0 to 3.6V
-40 to +85°C
SSOP30(275mil)
• 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 B8-9125/42800TN(OT) No. 6488-1/18
Package Dimensions
unit : mm (typ)
3191C
9.75
30
LC72720YV
1
0.65
(0.33)
0.22
0.15
SANYO : SSOP30(275mil)
Pin Assignment
VREF 1
MPXIN 2
Vdda 3
NC 4
Vssa 5
FLOUT 6
CIN 7
NC 8
T1 9
T2 10
T3 (RDCL) 11
NC 12
T4 (RDDA) 13
T5 (RSFT) 14
XOUT 15
LC72720YV
Top view
30 SYR
29 CE
28 DI
27 NC
26 CL
25 DO
24 RDS-ID
23 NC
22 SYNC
21 T7 (CORREC/ARI-ID/BE0)
20 T6 (ERROR/57K/BE1)
19 NC
18 Vssd
17 Vddd
16 XIN
No. 6488-4/18
4페이지 LC72720YV
CCB output data format
1. Each block of output data consists of 32 bits (4 bytes), of which 2 bytes are RDS data and 2 bytes are flag data.
2. Any number of 32-bits output data blocks can be output consecutively.
3. When there is no data that can be read out in the internal memory, the system outputs blocks of all-zero data
consecutively.
4. If data readout is interrupted, the next read operation starts with the 32-bit data block whose readout was interrupted.
However, if only the last bit is remaining to be read, it will not be possible to re-read that whole block.
5. The check bits (10 bits) are not output.
6. The data valid (OWD) must not be referred to.
7. When the first leading bits are not “1010”, the read in data is in invalid, and read operation is cancelled.
CCB address 6C
B BB B AA A A
DI 0 1 2 3 0 1 2 3
00110 110
Output data / first bit
Last bit
DO
1
0
1
0
O
W
D
B
2
B
1
B
0
R
E
R
F
1
R
F
0
AS
RY
IC
E
2
E
1
E
0
D
1
5
D
1
4
DD
11
32
D
1
1
D
1
0
D
9
DDDD
8765
D
4
DD
32
D
1
D
0
(8) RDS data
(7) Error information flags
(6) Synchronization established flag
(5) ARI(SK) detection flag
(4) RAM data remaining flags
(3) Consecutive RAM read out possible flag
(2) Offset word information flags
(1) Offset word detection flag
Fixed pattern (1010)
(1) Offset word detection flag (1bit) : OWD
OWD
1
0
Offset word detection
Detected
Not detected (protection function operating)
(2) Offset word information flag (3bit) : B0 to B2
BBB
210
000
001
010
011
100
101
110
111
Offset word
A
B
C
C’
D
E
Unused
Unused
No. 6488-7/18
7페이지 | |||
구 성 | 총 18 페이지수 | ||
다운로드 | [ LC72720YV.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
LC72720YV | Single-Chip RDS Signal-Processing System IC | ON Semiconductor |
LC72720YVS | Single-Chip RDS Signal-Processing System IC | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |