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參數資料
| 型號： | U4285BM |
| 英文描述： | AM / FM - PLL |
| 中文描述： | 調幅/調頻-鎖相環 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 138K |
| 代理商： | U4285BM |
U4285BM
TELEFUNKEN Semiconductors
Rev. A3, 14-May-97
1 (10)
AM / FM - PLL
Description
The U4285BM is an integrated circuit in BICMOS
technology for frequency synthesizers. It performs all the
functions of a PLL radio tuning system and is controlled
by an I
2
C bus. The device is designed for all frequency
synthesizer applications in 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
FM
1 kHz
2 kHz
4 programmable switching outputs
(open drain up to 15 V)
Few external component required due to
integrated loop-push-pull stage for AM/FM
High signal/ noise ratio
Ordering Information
Extended Type Number
U4285BM-AFS
U4285BM-AFSG3
Package
Remarks
SSO20 plastic
SSO20 plastic
Taping according to IEC-286-3
Block Diagram
R-divider
N-divider
I
2
C bus
interface
Oscillator
Phase
detector
Current
sources
Switching outputs
AM/FM
switch
18
19
2
3
4
9
11
OSCOUT
OSCIN
SCL
AS
FMOSC
AMOSC
SDA
5
6
7
8
10
1
20
SWO1
SWO4
SWO2 SWO3
14
15
16
17
12
13
PDAM
PDAMO
VA
C
PDFMO
PDFM
GND2
GND1
DD
V
95 10120
Figure 1.
相關PDF資料 |
PDF描述 |
|---|---|
| U4285BM-BFP | Consumer IC |
| U4285BM-BFS | Consumer IC |
| U4286BM-BFP | AM / FM-PLL |
| U4286BM-BFPG3 | AM / FM-PLL |
| U4286BM | AM / FM-PLL |
相關代理商/技術參數 |
參數描述 |
|---|---|
| U4285BM-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:AM / FM - PLL |
| U4285BM-AFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:AM / FM - PLL |
| U4285BM-BFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| U4285BM-BFS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| U4285BM-MFS | 功能描述:IC PLL AM/FM W/4 SWITCHES 20SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:- 標準包裝:100 系列:* |
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