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CD22202 Folha de dados(PDF) 1 Page - Intersil Corporation |
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CD22202 Folha de dados(HTML) 1 Page - Intersil Corporation |
1 / 6 page 4-245 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. January 1997 Pinout CD22202, CD22203 (PDIP) TOP VIEW D1 EN IN1633 XEN ANALOG IN 10 11 12 13 14 15 16 17 18 9 8 7 6 5 4 3 2 1 D2 D4 D8 CLRDV DV ATB XIN XOUT VDD VSS VSS HEX/B28 ED (203 ONLY), NC (202) Functional Diagram HIGH B/P FILTERS LOW B/P FILTERS VOLTAGE REG./REF. CHIP CLOCKS ATB XEN INI633 13 8 12 11 510 7 4 6 15 14 2 1 18 17 16 3 CLRDV DV D1 D2 D4 D8 EN XIN XOUT HEX/B28 ED-203 NC-202 VSS VDD ANALOG IN 9 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 Coded 2-of-8 • Synchronous or Handshake Interface • Three-State Outputs • Excellent Latch-Up Immunity Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD22202E 0 to 70 18 Ld PDIP E18.3 CD22203E 0 to 70 18 Ld PDIP E18.3 File Number 1695.3 DTMF Receivers/Generators CD22202, CD22203 5V Low Power DTMF Receiver 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 |
Nº de peça semelhante - CD22202 |
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Descrição semelhante - CD22202 |
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