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PDF LC72723M Data sheet ( Hoja de datos )
| Número de pieza | LC72723M | |
| Descripción | RDS Demodulation IC | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : EN6037
CMOS IC
LC72723, LC72723M
RDS Demodulation IC
Overview
The LC72723 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.
• Fully adjustment free.
Ratings
• Operating supply voltage: 4.5 to 5.5 V
• Operating temperature: –40 to 85°C
• Packages: DIP16 and MFP16
Package Dimensions
unit: mm
3006B-DIP16
[LC72723]
16 9
18
19.2
0.71 2.54 0.48
1.2
unit: mm
3035A-MFP16
16
[LC72723M]
9
18
10.1
SANYO: DIP16
0.15
0.35 1.27 0.605
SANYO: 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
40299RM (OT) No. 6037-1/8
1 page  
LC72723, LC72723M
Electrical Characteristics at Ta = –40 to +85°C, Vssd = Vssa = 0 V, Vddd = Vdda
Parameter
Input resistance
Internal feedback resistance
Center frequency
–3dB bandwidth
Gain
Stop band attenuation
Reference voltage output
Hysteresis
Low-level output voltage
High-level output voltage
High-level input current
Low-level input current
Output off leakage current
Current drain
Symbol
Conditions
Rmpxin MPXIN-Vssa: f = 57 KHz
Rcin CIN-Vssa: f = 57 KHz
Rf XIN
fc FLOUT
BW–3dB FLOUT
Gain MPXIN-FLOUT: f = 57 KHz
Att1 FLOUT: ∆f = ±7 KHz
Att2 FLOUT: f < 45 KHz, f > 70 KHz
Att3 FLOUT: f < 20 KHz
Vref Vref: Vdda = 5 V
VHIS
VOL1
VOL2
VOH
IIH1
IIH2
IIL1
IIL2
IOFF
Idd
TEST, MODE, RST, RDCL
RDDA, RDCL : I = 2 mA
RDS-ID (READY): I = 8 mA
RDDA, RDCL : I = 2 mA
TEST, MODE, RST, RDCL : VI = 6.5 V
XIN: VI = Vddd
TEST, MODE, RST, RDCL : VI = 0 V
XIN: VI = 0 V
RDS-ID (READY): VO = 6.5 V
Vddd + Vdda
Ratings
min typ
23
100
1.0
56.5
57.0
2.5 3.0
28 31
30
40
50
2.5
0.1 Vddd
Vddd – 0.4
2.0
2.0
8
max
57.5
3.5
34
0.4
0.4
5.0
11
5.0
11
5.0
Unit
KΩ
KΩ
MΩ
KHz
KHz
dB
dB
dB
dB
V
V
V
V
V
µA
µA
µA
µA
µA
mA
Inputs and Outputs
TEST
0
0
1
1
MODE
0
1
0
1
Circuit operating mode
Master mode
Slave mode
Standby mode (crystal oscillator stopped)
IC test mode (Cannot be set by users.)
RDCL pin
Clock output
Clock input
—
—
RDS-ID/READY pin
RDS-ID output
READY output
—
—
RST = 0
RST = 1
RST pin
Normal operation
The RDS-ID and demodulation circuits are cleared, and (in slave mode) the READY state and memory are cleared.
Master mode RDS-ID output (active low)
Slave mode Readout data ready output (active low)
RDS ID/READY pin
Note: The RDS-ID (READY) pin is an n-channel open-drain output, and data is read out by connecting a pull-up resistor.
No. 6037-5/8
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| PDF Descargar | [ Datasheet LC72723M.PDF ] | |
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