CM88L70CPI Ver la hoja de datos (PDF) - California Micro Devices Corp
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CM88L70CPI Datasheet PDF : 8 Pages
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CALIFORNIA MICRO DEVICES
CM88L70/70C
CMOS INTEGRATED DTMF RECEIVER, 3 VOLT VERSION
Features
2.7 to 3.6 volt operating range
Full DTMF receiver
Less than 18mW power consumption
Industrial temperature range
Uses quartz crystal or ceramic resonators
Adjustable acquisition and release times
18-pin DIP, 20-pin QSOP, 18-pin SOIC,
20-pin PLCC, 20-pin TSSOP
CM88L70
- Power down mode
- Inhibit mode
- Buffered oscillator output (OSC 3) to
drive other devices
Applications
PCMCIA
Portable TAD
Mobile radio
Remote control
Remote data entry
Call limiting
Telephone answering systems
Paging systems
Product Description
The CAMD CM88L70/70C 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, TSSOP, or QSOP package. The CM88L70/70C 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 CM88L70/70C
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 amplifier, 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.
Block Diagram
© 2000 California Micro Devices Corp. All rights reserved.
6/16/2000 215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
C0451098
www.calmicro.com
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