參數(shù)資料
型號(hào): MC12011
廠商: Motorola, Inc.
英文描述: MECL PLL COMPONENTS DUAL MODULUS PRESCALER
中文描述: 梅奇爾PLL元件雙分頻器
文件頁(yè)數(shù): 13/15頁(yè)
文件大?。?/td> 210K
代理商: MC12011
Enable = 1
Enable = 0
13
12
11
10
9
15
5
4
+
C
E5
E4
E3
E2
E1
Q4
Q4
2
3
7
MECL
to
MTTL
Trans–
lator
Figure 8. Divide By 10/11 (MC12013)
APPLICATIONS INFORMATION
The primary application of these devices is as a
high–speed variable modulus prescaler in the divide by N
section of a phase–locked loop synthesizer used as the
local oscillator of two–way radios.
Proper VHF termination techniques should be followed
when the clock is separated from the prescaler by any
appreciable distance.
In their basic form, these devices will divide by 5/6, 8/9,
or 10/11. Division by 5, 8, or 10 occurs when any one or all
of the five gate inputs E1 through E5 are high. Division by
6, 9, or 11 occurs when all inputs E1 through E5 are low.
(Unconnected MTTL inputs are normally high, uncon-
nected MECL inputs are normally low). With the addition
of extra parts, many different division configurations may
be obtained (20/21, 40/41, 50/51, 100/101, etc.) A few of
the many configurations are shown below, only for the
MC12013.
MC12009 MC12011 MC12013
13
MOTOROLA RF/IF DEVICE DATA
Q1
1
0
0
0
1
1
0
0
0
1
1
Q2
1
1
0
0
0
1
1
0
0
0
1
Q3
1
1
1
0
0
0
1
1
0
0
0
Q4
1
1
1
1
1
1
0
0
0
0
0
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