CD22202E Intersil Corporation, CD22202E Datasheet

no-image

CD22202E

Manufacturer Part Number
CD22202E
Description
5V Low Power DTMF Receiver
Manufacturer
Intersil Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CD22202E
Manufacturer:
INTERSIL
Quantity:
5 510
Part Number:
CD22202E
Manufacturer:
INTERS
Quantity:
57
January 1997
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
Features
• 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
• Synchronous or Handshake Interface
• Three-State Outputs
• Excellent Latch-Up Immunity
Ordering Information
Pinout
ED (203 ONLY),
CD22202E
CD22203E
Coded 2-of-8
NUMBER
ANALOG IN
PART
NC (202)
HEX/B28
IN1633
XEN
V
V
EN
D1
DD
SS
CD22202, CD22203
1
2
3
4
5
6
7
8
9
RANGE (
TOP VIEW
0 to 70
0 to 70
(PDIP)
TEMP.
o
C)
|
Copyright
18 Ld PDIP
18 Ld PDIP
18
17
16
15
14
13
12
11
10
PACKAGE
D2
D4
D8
CLRDV
DV
ATB
XIN
XOUT
V
SS
©
Intersil Corporation 1999
CD22202, CD22203
E18.3
E18.3
PKG. NO.
Functional Diagram
ANALOG IN
XOUT
XIN
ATB
XEN
4-245
13
12
11
9
8
Description
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.
5V Low Power DTMF Receiver
V
DD
5
CHIP
CLOCKS
REG./REF.
VOLTAGE
HIGH B/P
LOW B/P
FILTERS
FILTERS
10
V
SS
7
File Number
INI633
4
6
15
14
2
1
18
17
16
3
ED-203
NC-202
CLRDV
DV
HEX/B28
D1
D2
D4
D8
EN
1695.3

Related parts for CD22202E

CD22202E Summary of contents

Page 1

... 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 TEMP. o NUMBER RANGE ( C) PACKAGE CD22202E PDIP CD22203E PDIP Pinout CD22202, CD22203 (PDIP) TOP VIEW ...

Page 2

Absolute Maximum Ratings DC Supply Voltage (V )(Referenced Power Dissipation (Derate above 6.25mW Input Voltage Range All Inputs Except Analog ...

Page 3

Functional Block Diagram ANALOG PREPROCESSOR IN 60Hz 9 PRE EMP REJECT 13 ATB 8 XEN 12 8 XIN 1M XOUT 11 POWER REGULATOR NOTE: Pin 6: Early detect output on CD22203 only. System Functions Analog In The ...

Page 4

XIN 12 11 ATB CD22202/22203 13 XIN CONNECTED CD22202/22203 DEVICES FIGURE 2. CRYSTAL OSCILLATOR HEX/B28 This pin selects the format of the digital output code. When HEX/B28 is tied high, the ...

Page 5

RC filter shown below may be used to band limit the incoming signal. The cut off frequency is 3.9kHz. ANALOG 270k IN NOISY SIGNAL 0.0015 F 33k FIGURE 4. FILTER FOR USE IN EXTREME HIGH FREQUENCY ...

Page 6

... 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 ...

Related keywords