參數(shù)資料
型號(hào): U4285BM
英文描述: AM / FM - PLL
中文描述: 調(diào)幅/調(diào)頻-鎖相環(huán)
文件頁(yè)數(shù): 8/10頁(yè)
文件大?。?/td> 138K
代理商: U4285BM
U4285BM
TELEFUNKEN Semiconductors
Rev. A3, 14-May-97
8 (10)
Recommendations for Applications
C
3
= 100 nF should be very close to Pin 1 (V
DD
) and
Pin 20 (GND 1)
GND 2 (Pin 10 – analogue ground) and GND 1
(Pin 20 – digital ground) must be connected according
to figure 8
4 MHz crystal must be very close to Pin 18 and Pin 19
Components of the charge pump (C
1
/R
1
for AM and
C
2
/R
2
for FM) should be very close to Pin 14 with
respect to Pin 13.
PCB-Layout
16
15
14
13
12
11
10
9
1
3
4
2
5
7
8
6
GND
DD
V
C
1
C
2
C
4
C
3
17
18
19
20
95 10124
Figure 8.
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