Description
The M-88L70 monolithic DTMF receiver offers small size, low power consumption and high performance, with 3 volt operation. Its architecture consists of a bandsplit filter section, which separates the high and low group tones, followed by a digital counting section which verifies the frequency and duration of the received tones before passing the corresponding code to the output bus.

Features
• Operates between 2.7 and 3.6 volts
• Low power consumption
• Power-down mode
• Inhibit mode
• Central office quality and performance
• Inexpensive 3.58 MHz time base
• Adjustable acquisition and release times
• Dial tone suppression
• Functionally compatible with Clare’s M-8870

Applications
• Telephone switch equipment
• Mobile radio
• Remote control
• Paging systems
• PCMCIA
• Portable TAD
• Remote data entry