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參數(shù)資料
| 型號： | CD22204 |
| 廠商： | Intersil Corporation |
| 英文描述： | 5V Low Power Subscriber DTMF Receiver |
| 中文描述： | 5V的低功耗雙音多頻接收登記 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 44K |
| 代理商： | CD22204 |
69
Functional Block Diagram
System Functions
Analog In
The Analog In pin accepts the analog input. It is internally
biased so that the input signal may be either AC or DC cou-
pled, as long as it does not exceed the positive supply volt-
age. Proper input coupling is illustrated below.
FIGURE 1. ANALOG IN
The CD22204 is designed to accept sinusoidal input wave-
forms, but will operate satisfactorily with any input that has
the correct fundamental frequency with harmonics that are
at least 20dB below the fundamental.
Crystal Oscillator
The CD22204 contains an on-board inverter with sufficient
gain to provide oscillation when connected to a low cost tele-
vision “color-burst” (3.579545MHz) crystal. The crystal oscil-
lator is enabled by tying XEN high. The crystal is connected
between XIN and XOUT. A 1M
resistor is also connected
between these pins in this mode. ATB is a clock frequency
output. Other CD22204 devices may use the same fre-
quency reference by tying their ATB pins to the ATB output of
a crystal connected device. XIN and XEN of the auxiliary
devices must then be tied high and low, respectively. Up to
ten devices may be run from a single crystal connected
CD22204 as shown in Figure 2.
÷
8
60Hz
REJECT
CLOCK
GENERATOR
CHIP CLOCKS
PRE EMP
POWER REGULATOR
4
8
V
DD
V
SS
VOLTAGE
REF
697
770
852
941
1209
1336
1477
1633
BAND
SPLIT
FILTERS
ZERO
CROSSING
DETECTORS
BANDPASS
FILTERS
AMPLITUDE
DETECTORS
OUTPUT
DECODER
OUTPUT
REGISTER
TIMING
CIRCUITRY
DATA STROBE
12
2
1
14
13
3
DATA CLEAR
DV
D1
D2
D4
D8
EN
ANALOG
IN
PREPROCESSOR
7
BS1
BS2
10
9
11
6
ATB
XEN
XIN
XOUT
1M
NOTE: Pin numbers are for plastic DIP.
7
V
SS
V
DD
10pF
>100k
(ON CHIP)
270k
33k
ANALOG
IN
1500pF
OPTIONAL
HIGH FREQUENCY
NOISE FILTER
(f
C
= 3.9kHz)
AUDIO
INPUT
(+4dBm OR
1.22V
RMS
MAXIMUM)
0.01
μ
F
CD22204E
CD22204
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CD22204E | R8C Series, 23 Group, WDTO 48P6Q-A |
| CD22301 | Monolithic PCM Repeater |
| CD22301E | Monolithic PCM Repeater |
| CD22354A | CMOS Single-Chip, Full-Feature PCM CODEC |
| CD22354AE | CMOS Single-Chip, Full-Feature PCM CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CD22204 WAF | 制造商:Harris Corporation 功能描述: |
| CD22204_02 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:5V Low Power Subscriber DTMF Receiver |
| CD22204E | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:5V Low Power Subscriber DTMF Receiver |
| CD22204M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CD22204M96 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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