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PDF ( 数据手册 , 数据表 ) LC72147V

零件编号 LC72147V
描述 PLL Frequency Synthesizer for Electronic Tuning in Car Audio Systems
制造商 Sanyo Semicon Device
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LC72147V 数据手册, 描述, 功能
Ordering number : ENN6675
CMOS IC
LC72147V
PLL Frequency Synthesizer for Electronic Tuning
in Car Audio Systems
Overview
The LC72147V is a PLL frequency synthesizer for car
audio systems. It can implement high-performance
multifunction tuners and features a crystal oscillator
circuit that supports AM up-conversion, a fast locking
circuit, an A/D converter, and an LA1783/1750 IF counter
buffer control pin.
Functions
• High-speed programmable divider
— FMIN: 10 to 180 MHz: Pulse swallower type
• IF counter
— HCTR: 0.4 to 25 MHz: Frequency measurement
• Crystal oscillator: One of the following 4 frequencies
may be selected: 10.35, 10.25, 7.2, and 4.5 MHz
Reference frequency
— One of 12 frequencies may be selected (when a 7.2
or 4.5 MHz crystal is used)
100*1, 50, 30*2, 25, 12.5, 6.25, 3.125, 10, 9*2, 5, 3*2,
1 kHz
Notes: 1. Cannot be used when a 10.35 or 10.25 MHz
crystal is used
2. Cannot be used when a 10.25 MHz crystal
is used
• Phase comparator
— Supports dead band control
— Built-in unlock detection circuit
— Sub-charge pump for fast locking
— Built-in deadlock clearing circuit
• Built-in MOS transistor for forming an active low-pass
filter
• I/O ports — General-purpose I/O: 5 pins
— Output: n-channel: 3 pins, CMOS: 2 pins
— IFBC pin (LA1783/1750 IF counter buffer control
pin)
• Serial data I/O
— Supports communication with the controller in the
CCB format.
• Operating ranges
— Supply voltage (VDD): 4.5 to 6.5 V
— Built-in regulator voltage (Vreg): 3.0 V (±10%)
— Operating temperature: –40 to +85°C
• Package
— SSOP-24
Package Dimensions
unit: mm
3175A-SSOP24
[LC72147V]
24 13
1 12 0.15
8.0
0.22 0.65 0.43 SANYO: SSOP24
• CCB is a trademark of SANYO ELECTRIC CO., LTD.
• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.
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
O1300RM (OT) No. 6675-1/22







LC72147V pdf, 数据表
LC72147V
DI control data (serial data input) structure
(1) IN1
Address
DI 0 0 0 1 0 1 0 0
First data IN1
(2) IN2
Address
DI 1 0 0 1 0 1 0 0
First data IN2
*: Don't care
No. 6675-8/22







LC72147V equivalent, schematic
Programmable divider structure
FMIN
DVS
4 bits
Swallow
counter
LC72147V
12 bits
fvco/N
Programmable
divider
ferf
fvco = ferf × N
PD øE
DVS
1
0
Set divisor (N)
272 to 65535
Input frequency range (f(MHz))
Minimum input sensitivity
10 f < 130
130 f 180
40 mVrms
70 mVrms
——
General-purpose counter structure
The LC72147V’s general-purpose counter is a 20-bit binary counter.
The result of the count operation can be read out MSB first from the DO pin.
FMIN
Selected
Pulled down
HCTR
CTS
1
2
GT1, GT0
4/8/32/64
msec
( FIF )
GT
General-purpose counter
(20-bit binary counter)
L
S
B
0 to 3
4 to 7
M
S
B
8 to 11 12 to 15 16 to 19
DO pin
CT
C = FIF × GT
The measurement time when the general-purpose counter is used for frequency measurement is set to either 4, 8, 32, or
64 ms by the GT0 and GT1 bits. The frequency of the input to the HCTR pin can be measured by determining how many
pulses were input to the general-purpose counter during this measurement time.
Check signal frequency
X’tal OSC
Check signal
4.5 MHz
900 kHz
7.2 MHz
900 kHz
10.25 MHz
1025 kHz
10.35 MHz
fref = 30, 9, 3 kHz fref : other than 30, 9, 3 kHz
1030 kHz
1150 kHz
The CTC data switches the input sensitivity. The input sensitivity is reduced when CTC is set to 1.
CTC
0 (Normal mode)
1 (Reduced sensitivity mode)
0.4 f < 8
70 mVrms
HCTR: Minimum input sensitivity rating
8 f < 12
70 mVrms
(10 to 20 mVrms)
100 mVrms
(30 to 40 mVrms)
12 f < 25
70 mVrms
—: No sensitivity rating (not guaranteed)
( ): Rated value (reference value)
No. 6675-16/22










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