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CD22203 데이터시트(PDF) 6 Page - Intersil Corporation

부품명 CD22203
상세설명  5V Low Power DTMF Receiver
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제조업체  INTERSIL [Intersil Corporation]
홈페이지  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CD22203 데이터시트(HTML) 6 Page - Intersil Corporation

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All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate
and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site http://www.intersil.com
CD22202, CD22203
FIGURE 6. CD22203 DTMF RECEIVER WITH GUARD TIME CIRCUIT TO PROVIDE EXCEPTIONAL TALK-OFF PERFORMANCE
D1
EN
IN1633
XEN
ANALOG IN
D2
D4
D8
CLRDV
DV
ATB
XIN
XOUT
VDD
VSS
VSS
HEX/B28
ED
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
16
17
18
+5V
10
µF
R2
240K
(55ms)
IN4148
C2
0.15
µF
R5
1.8M
R6
100K
ENABLE
INPUT 1/3 CD74HC04
(BUFFERS OPTIONAL)
DV
OUT
R4
33K
R3
390K
C1
4700pF
R1
1M
3.58
MHz
AUDIO
IN
D8
HEX DATA OUT
D4 D2 D1
Handling
All inputs and outputs of CMOS devices have a network for
electrostatic protection during handling. Recommended han-
dling
practices
for
CMOS
devices
are
described
in
ICAN-6525 “Guide to Better Handling and Operation of
CMOS Integrated Circuits”.
Operating
Operating Voltage
During operation near the maximum supply voltage limit,
care should be taken to avoid or suppress power supply
turn-on and turnoff transients, power supply ripple, or ground
noise; any of these conditions must not cause VDD - VSS to
exceed the absolute maximum rating.
Input Signals
To prevent damage to the input protection circuit, input sig-
nals should never be greater than VDD nor less than VSS.
Input currents must not exceed 20mA even when the power
supply is off.
Unused Inputs
A connection must be provided at every input terminal. All
unused input terminals must be connected to either VDD or
VSS, whichever is appropriate.
Output Short Circuits
Shorting of outputs to VDD or VSS may damage CMOS
devices by exceeding the maximum device dissipation.
Operating and Handling Considerations


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