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參數(shù)資料
型號: U4286BM-BFP
英文描述: AM / FM-PLL
中文描述: 調(diào)幅/調(diào)頻鎖相環(huán)
文件頁數(shù): 1/9頁
文件大小: 113K
代理商: U4286BM-BFP
TELEFUNKEN Semiconductors
U4286BM
Preliminary Information
Rev. A1: 19.08.1996
1 (9)
AM / FM-PLL
Description
The U4286BM is an integrated circuit in BICMOS
technology for frequency synthesizer. It performs all the
functions of a PLL radio tuning system and is controlled
by I
2
C bus. The device is designed for all frequency
synthesizer applications of radio receivers, as well as
RDS (
R
adio
D
ata
S
ystem ) applications.
Features
Reference oscillator up to 15 MHz
Two programmable 16 bit dividers
adjustable from 2 to 65535
Fine tuning steps: AM
1 kHz
2 kHz
FM
Two programmable switching outputs (open drain up
to 20 V)
Few external component requirements due to
integrated loop-transistor for AM/FM
High signal/ noise ratio
Block Diagram
Shift register
Latch
Latch
Preamplifier
R–Divider
N–Divider
Preamplifier
:2
Oscillator
Status
Latch
detector
Phase
Current
sources
Analogue
outputs
Switching outputs
11
PDFM
12
PDAM
10
PDFMO
13
PDAMO
8
1
DD
V
16
GND 2
GND 1
7
FMOSC
9
AMOSC
2
3
SDA
SCL
4
AS
14
15
OSCIN
OSCOUT
5
SWO 1
6
SWO 2
93 7581 e
AM/FM
switch
I
2
C–BUS
Interface
Figure 1.
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