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Intersil Electronic Components Datasheet

CD22203 Datasheet

5V Low Power DTMF Receiver

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DTMF Receivers/Generators
CD22202, CD22203
January 1997
5V Low Power DTMF Receiver
Features
Description
• Central Office Quality
• No Front End Band Splitting Filters Required
• Single, Low Tolerance, 5V Supply
• Detects Either 12 or 16 Standard DTMF Digits
• Uses Inexpensive 3.579545MHz Crystal for Reference
• Excellent Speech Immunity
• Output in Either 4-Bit Hexadecimal Code or Binary
Coded 2-of-8
• Synchronous or Handshake Interface
• Three-State Outputs
• Excellent Latch-Up Immunity
Ordering Information
PART
NUMBER
CD22202E
CD22203E
TEMP.
RANGE (oC) PACKAGE
0 to 70 18 Ld PDIP
0 to 70 18 Ld PDIP
PKG. NO.
E18.3
E18.3
The CD22202 and CD22203 complete dual-tone multiple
frequency (DTMF) receivers detect a selectable group of 12
or 16 standard digits. No front-end pre-filtering is needed.
The only externally required components are an inexpensive
3.579545MHz TV “colorburst’’ crystal (for frequency refer-
ence) and a bias resistor. Extremely high system density is
possible through the use of the clock output of a crystal con-
nected CD22202/CD22203 receiver to drive the time bases
of additional receivers. This is a monolithic integrated circuit
fabricated with low-power, complementary symmetry CMOS
processing. It only requires a single low tolerance power
supply.
The CD22202 and CD22203 employ state-of-the-art circuit
technology to combine the digital and analog functions on
the same CMOS chip using a standard digital semiconductor
process. The analog input is preprocessed by 60Hz reject
and band splitting filters and then hard limited to provide
AGC. Eight Bandpass filters detect the individual tones. The
digital post processor times the tone durations and provides
the correctly coded digital outputs. Outputs interface directly
to standard CMOS circuitry and are three-state enabled to
facilitate bus oriented architectures.
Pinout
CD22202, CD22203
(PDIP)
TOP VIEW
D1 1
HEX/B28 2
EN 3
IN1633 4
VDD
ED (203 ONLY),
NC (202)
VSS
5
6
7
XEN 8
ANALOG IN 9
18 D2
17 D4
16 D8
15 CLRDV
14 DV
13 ATB
12 XIN
11 XOUT
10 VSS
Functional Diagram
9
ANALOG IN
13
ATB
8
XEN
XIN
12
11
XOUT
LOW B/P
FILTERS
HIGH B/P
FILTERS
CHIP
CLOCKS
VOLTAGE
REG./REF.
5
VDD
10 7
VSS
6 ED-203
NC-202
15
CLRDV
14
DV
2
HEX/B28
1
D1
18
D2
17
D4
16
D8
3
EN
4
INI633
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
4-245
File Number 1695.3


Intersil Electronic Components Datasheet

CD22203 Datasheet

5V Low Power DTMF Receiver

No Preview Available !

CD22202, CD22203
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage (VDD)(Referenced to VSS Terminal). . . . . . . . 7V
Power Dissipation
TA = 25oC (Derate above TA = 25oC at 6.25mW/oC. . . . . . . . 65mW
Input Voltage Range
All Inputs Except Analog In . . . . . . . . . . . . . . (VDD +0.5V) to -0.5V
Analog in Voltage Range . . . . . . . . . . . . (VDD +0.5V) to (VDD -10V)
DC Current into any Input or Output . . . . . . . . . . . . . . . . . . . . . .±20mA
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 175oC
Maximum Junction Temperature (Plastic) . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC
NOTE: Unused inputs must be connected to VDD or VSS as appropriate.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Electrical Specifications 0oC TA +70oC, VDD = 5V ±10%
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
UNITS
Frequency Detect Bandwidth
Amplitude for Detection
Each Tone
±(1.5 + 2Hz)
-32
±2.3
-
±3.5
-2
% of fO
dBm Referenced to 600
Minimum Acceptable Twist
Tw ist = H-L----oi--g-w--h----T-T--o-o---n-n---ee--
-10 - +10 dB
60Hz Tolerance
Dial Tone Tolerance
“Precise” Dial Tone
--
--
Talk Off
MITEL Tape #CM7291
Digital Outputs (except XOUT) “0” Level, 400µA Load
“1” Level, 200µA Load
Digital Inputs
“0” Level
Supply Current
Noise Tolerance
“1” Level
TA = +25oC
MITEL Tape #CM7291
(Note 1)
Input Impedance
VDD VIN (VDD -10)
NOTE:
1. Bandwidth limited (3kHz) Gaussian noise.
-
0
VDD -0.5
0
0.7VDD
-
-
2
-
-
-
-
10
-
100k//15pF 300k
0.8
0
-
0.5
VDD
0.3VDD
VDD
16
-12
-
VRMS
dB Referenced to Lower
Amplitude Tone
Hits
V
V
V
V
mA
dB Referenced to Lowest
Amplitude Tone
4-246


Part Number CD22203
Description 5V Low Power DTMF Receiver
Maker Intersil Corporation
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CD22203 Datasheet PDF






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