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零件编号 | LC72131 | ||
描述 | AM/FM PLL Frequency Synthesizer | ||
制造商 | Sanyo Semicon Device | ||
LOGO | |||
1 Page
Ordering number : EN4921B
CMOS LSI
LC72131, 72131M
AM/FM PLL Frequency Synthesizer
Overview
The LC72131 and LC72131M are PLL frequency
synthesizers for use in tuners in radio/cassette players.
They allow high-performance AM/FM tuners to be
implemented easily.
Applications
Package Dimensions
unit: mm
3059-DIP22S
[LC72131]
PLL frequency synthesizer
Functions
• High speed programmable dividers
— FMIN: 10 to 160 MHz ..........pulse swallower
(built-in divide-by-two prescaler)
— AMIN: 2 to 40 MHz ..............pulse swallower
0.5 to 10 MHz ...........direct division
• IF counter
— IFIN: 0.4 to 12 MHz ...........AM/FM IF counter
• Reference frequencies
— Twelve selectable frequencies
(4.5 or 7.2 MHz crystal)
1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50 and 100 kHz
• Phase comparator
— Dead zone control
— Unlock detection circuit
— Deadlock clear circuit
• Built-in MOS transistor for forming an active low-pass
filter
• I/O ports
— Dedicated output ports: 4
— Input or output ports: 2
— Support clock time base output
• Serial data I/O
— Support CCB format communication with the
system controller.
• Operating ranges
— Supply voltage........................4.5 to 5.5 V
— Operating temperature............–40 to +85°C
• Packages
— DIP22S/MFP20
unit: mm
3036B-MFP20
[LC72131M]
SANYO: DIP22S
SANYO: MFP20
• 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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
62096HA (OT)/O3195HA (OT)/92294TH (OT) No. 4921-1/23
LC72131, 72131M
Serial Data I/O Methods
The LC72131 inputs and outputs data using the Sanyo CCB (computer control bus) audio LSI serial bus format. This
LSI adopts an 8-bit address format CCB.
I/O mode
Address
B0 B1 B2 B3 A0 A1 A2 A3
Function
• Control data input mode (serial data input)
1
IN1 (82)
0
00
1
0
10
0
• 24 data bits are input.
• See the “DI Control Data (serial data input) Structure”
item for details on the meaning of the input data.
• Control data input mode (serial data input)
2
IN2 (92)
1
00
1
0
10
0
• 24 data bits are input.
• See the “DI Control Data (serial data input) Structure”
item for details on the meaning of the input data.
Data output mode (serial data output)
• The number of bits output is equal to the number of clock
3
OUT (A2)
0 1 0 1 0 1 0 0 cycles.
• See the “DO Output Data (serial data output) Structure”
item for details on the meaning of the output data.
No. 4921-8/23
LC72131, 72131M
IF Counter Structure
The LC72131 IF counter is a 20-bit binary counter. The result, i.e., the counter’s msb, can be read serially from the DO pin.
Measurement time
GT1 GT0
Measurement period (GT) (ms)
Wait time (twu) (ms)
00
4
3 to 4
01
8
3 to 4
10
32
7 to 8
11
64
7 to 8
The IF frequency (Fc) is measured by determining how many pulses were input to an IF counter in a specified
measurement period, GT.
Fc = C
GT
(C = Fc × GT)
C: Count value (number of pulses)
1. IF Counter Frequency Calculation Examples
• When the measurement period (GT) is 32 ms, the count (C) is 53980 hexadecimal (342400 decimal):
IF frequency (Fc) = 342400 ÷ 32 ms = 10.7 MHz
• When the measurement period (GT) is 8 ms, the count (C) is E10 hexadecimal (3600 decimal):
IF frequency (Fc) = 3600 ÷ 8 ms = 450 kHz
No. 4921-16/23
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页数 | 23 页 | ||
下载 | [ LC72131.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
LC72130 | AM/FM PLL Frequency Synthesizer | Sanyo Semicon Device |
LC72130M | AM/FM PLL Frequency Synthesizer | Sanyo Semicon Device |
LC72131 | AM/FM PLL Frequency Synthesizer | Sanyo Semicon Device |
LC72131K | PLL Frequency Synthesizer | ON Semiconductor |
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