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CM8870CPEI Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CM8870CPEI Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 8 page © 2000 California Micro Devices Corp. All rights reserved. 9/28/2000 1 CM8870/70C CALIFORNIA MICRO DEVICES 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CMOS Integrated DTMF Receiver Features • Full DTMF receiver • Less than 35mW power consumption • Industrial temperature range • Uses quartz crystal or ceramic resonators • Adjustable acquisition and release times • 18-pin DIP, 18-pin DIP EIAJ, 18-pin SOIC, 20-pin PLCC • CM8870C — Power down mode — Inhibit mode — Buffered OSC3 output (PLCC package only) • CM8870C is fully compatible with CM8870 for 18-pin devices by grounding pins 5 and 6 Product Description The CAMD CM8870/70C provides full DTMF receiver capability by integrating both the bandsplit filter and digital decoder functions into a single 18-pin DIP, SOIC, or 20-pin PLCC package. The CM8870/70C is manufactured using state-of-the-art CMOS process technology for low power consumption (35mW, max.) and precise data handling. The filter section uses a switched capacitor technique for both high and low group filters and dial tone rejection. The CM8870/70C decoder uses digital counting techniques for the detection and decoding of all 16 DTMF tone pairs into a 4-bit code. This DTMF receiver minimizes external component count by providing an on-chip differential input ampli- fier, clock generator, and a latched three-state interface bus. The on-chip clock generator requires only a low cost TV crystal or ceramic resonator as an external component. Applications • PABX • Central office • Mobile radio • Remote control • Remote data entry • Call limiting • Telephone answering systems • Paging systems +##' |
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