CD22202 View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
CD22202 Datasheet PDF : 6 Pages
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CD22202, CD22203
+5V
10µF
R2
≈ 240K
(55ms)
IN4148
C2
0.15µF
R5
1.8M
D1
1
HEX/B28
2
EN
3
IN1633
4
VDD
5
ED
6
VSS
7
XEN
8
ANALOG IN
9
R6
R4
100K
33K
ENABLE
INPUT 1/3 CD74HC04
DV
OUT
(BUFFERS OPTIONAL)
D2
18
D4
17
D8
16
CLRDV
15
DV
14
ATB
13
XIN
12
XOUT
11
10 VSS
R1
3.58 1M
MHz
≈
R3
390K
C1
4700pF
AUDIO
IN
D8 D4 D2 D1
HEX DATA OUT
FIGURE 6. CD22203 DTMF RECEIVER WITH GUARD TIME CIRCUIT TO PROVIDE EXCEPTIONAL TALK-OFF PERFORMANCE
Operating and Handling Considerations
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.
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Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software 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 www.intersil.com
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