Ordering number : ENN7672A
SANYO Semiconductors
DATA SHEET
LC72725M
LC72725V
LC72725NV
Overview
CMOS IC
RDS Demodulation IC
The LC72725 is an RDS (Radio Data System) signal demodulation IC. This IC integrates a bandpass filter, the
demodulation circuit, and buffer RAM on a single chip and can read out RDS data in slave mode operation with the
provision of an external clock input. It also supports master mode, in which the data is read out in synchronization with an
RDS clock output provided by the IC itself.
Functions
• Bandpass filter: Switched capacitor filter (SCF)
• RDS demodulation: Functions include 57kHz carrier regeneration, clock regeneration, biphase decoding, and
differential decoding
• Buffer RAM: Stores 128 bits (about 100 ms) of data.
• Data output: Output can be switched between master mode and slave mode readout.
• RDS ID detection: Supports ID reset
• Standby control: Stops the crystal oscillator.
• Low voltage: 2.7 to 5.5 V (LC72723: 4.5 to 5.5 V)
• Improvement sample in crystal oscillation capability: LC72725NV
• Fully adjustment free.
Ratings
• Operating supply voltage: 2.7 to 5.5 V
• Operating temperature: –20 to +70°C
• Packages: MFP16 and SSOP16 (LC72723: DIP 16 and MFP16)
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
92104TN (OT) / N1503TN (OT) No. 7672-1/8
LC72725M, LC72725V, LC72725NV
Specifications
Absolute Maximum Ratings
at Ta = 25°C, Vssd = Vssa = 0 V.
Parameter
Maximum supply voltage
Symbol
V
DD
max
V
IN
1 max
Maximum input voltage
V
IN
2 max
V
IN
3 max
Vo1 max
Maximum output voltage
Vo2 max
Vo3 max
Maximum output current
Io1 max
Io2 max
Pd max
Topr
Tstg
Vddd, Vdda
*
TEST, MODE, RST
XIN, RDCL
MPXIN, CIN
RDS-ID (READY)
XOUT, RDDA, RDCL
FLOUT
XOUT, FLOUT, RDDA, RDCL
RDS–ID (READY)
(Ta
≤
85°C)
Conditions
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
+3.0
+20.0
MFP16 : 140
SSOP16 : 100
–20 to +70
–40 to +125
Unit
V
V
V
V
V
V
V
mA
mA
mW
mW
°C
°C
Allowable power dissipation
Operating temperature
Storage temperature
*:
Note that Vdda must be less than or equal to Vddd + 0.3 V
Allowable Operating Ranges
at Ta = –20 to +70°C, Vssd = Vssa = 0 V, Vddd = Vdda.
Parameter
Supply voltage
High-level input voltage
Low-level input voltage
Output voltage
Symbol
V
DD
V
IH
1
V
IH
2
V
IL
Vo1
Vo2
V
IN
VX
IN
Xtal
TXtal
t
CS
t
CH
t
CL
t
DC
t
RC
t
RL
Conditions
Vddd, Vdda: Vddd = Vdda
TEST, MODE, RST
RDCL
TEST, MODE, RST, RDCL
RDDA, RDCL
RDS–ID (READY)
MPXIN: f = 57 ±2 kHz
XIN
XIN, XOUT: C1
≤
120
Ω
XIN, XOUT: Fo = 4.332 MHz
RDCL, RDDA
RDCL
RDCL
RDCL, RDDA
RDCL, READY
READY
0
0.75
0.75
0.75
0.75
107
1.6
400
4.332
±100
Ratings
min
2.7
0.7 Vddd
0.7 Vddd
0
typ
max
5.5
6.5
Vddd
0.3 Vddd
Vddd
6.5
50
1500
Unit
V
V
V
V
V
V
mVrms
mVrms
MHz
ppm
µs
µs
µs
µs
µs
ms
Input amplitude
Guaranteed oscillator operating range
Crystal oscillator frequency deviation
RDCL setup time
RDCL high-level time
RDCL low-level time
Data output time
READY output time
READY low-level time
No. 7672-2/8
LC72725M, LC72725V, LC72725NV
Electrical Characteristics
at Ta = –20 to +70°C, Vssd = Vssa = 0 V, Vddd = Vdda.
Parameter
Symbol
Rmpxin
Rcin
Rf
fc
BW–3dB
Gain
Att1
Stop band attenuation
Att2
Att3
Reference voltage output
Hysteresis
Low-level output voltage
High-level output voltage
High-level input current
Vref
V
HIS
V
OL1
V
OL2
V
OH
I
IH
1
I
IH
2
I
IL
1
I
IL
2
I
OFF
Idd
Conditions
MPXIN-Vssa: f = 57 kHz
CIN-Vssa: f = 57 kHz
XIN
FLOUT
FLOUT
MPXIN-FLOUT: f = 57 kHz
FLOUT:
∆f
= ±7 kHz
FLOUT: f < 45 kHz, f > 70 kHz
FLOUT: f < 20 kHz
Vref: Vdda = 3 V
TEST, MODE, RST, RDCL
RDDA, RDCL : I = 2 mA
RDS-ID (READY): I = 8 mA
RDDA, RDCL : I = 2 mA
TEST, MODE, RST, RDCL : V
I
= 6.5 V
XIN: V
I
= Vddd
TEST, MODE, RST, RDCL : V
I
= 0 V
XIN: V
I
= 0 V
RDS-ID (READY): V
O
= 6.5 V
Vddd + Vdda (Vddd = Vdda = 3 V)
5
2.0
2.0
Vddd – 0.4
5.0
11
5.0
11
5.0
56.5
2.5
28
30
40
50
1.5
0.1 Vddd
0.4
0.4
Ratings
min
typ
100
120
1.0
57.0
3.0
31
57.5
3.5
34
max
Unit
KΩ
KΩ
MΩ
kHz
kHz
dB
dB
dB
dB
V
V
V
V
V
µA
µA
µA
µA
µA
mA
Input resistance
Internal feedback resistance
Center frequency
–3dB bandwidth
Gain
Low-level input current
Output off leakage current
Current drain
Package Dimensions
unit: mm
3035B
[LC72725M]
10.0
16
9
16
unit: mm
3178A
[LC72725V,LC72725NV]
5.2
9
4.4
6.4
4.4
(1.5)
1
1.7max
8
0.1 (1.3)
1.5max
(0.56)
1.27
0.35
0.15
0.15
0.1
0.22
0.65
(0.33)
SANYO: MFP16
SANYO: SSOP16
0.5
1
8
0.63
6.4
No. 7672-3/8
LC72725M, LC72725V, LC72725NV
Pin Assignment (MFP16/SSOP16)
LC72725M
LC72725V
LC72725NV
Top view
Block Diagram
No. 7672-4/8
LC72725M, LC72725V, LC72725NV
Pin Descriptions
Pin No.
Pin
Function
I/O
Pin circuit type
3
VREF
Reference voltage output (Vdda/2)
Output
4
MPXIN
Base band (multiplex) signal input
Input
7
FLOUT
Subcarrier output (filter output)
Output
8
CIN
Subcarrier input (comparator input)
Input
5
6
14
Vdda
Vssa
XOUT
Analog system power supply (+3 V)
Analog system ground
Crystal element output (4.332 MHz)
—
—
Output
—
—
13
XIN
Crystal element input (or external reference signal input)
9
10
15
TEST
MODE
RST
Test input
Readout mode setting (0: master, 1: slave)
RDS ID and RAM reset (Active high logic)
Input
2
RDDA
RDS data output
Output
16
RDCL
RDS clock output (master mode)
RDS clock input (slave mode)
I/O
1
RDS-ID/READY
RDS ID/ready output (Active high)
Output
12
11
Vddd
Vssd
Digital system power supply (+3 V)
Digital system ground
—
—
—
—
No. 7672-5/8
Industrial Control Electronics
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