VDD VSS VRef INH Bias Circuit VRef Buffer Chip Chip Power Bias High Group Filter Digital Detection Algorithm Code Converter and Latch Dial Tone Filter Zero Crossing Detectors Low Group Filter to all Chip Clocks St GT Steering Logic OSC1 OSC2 St/GT ESt STD
Ordering Information MT88L70AC 18 Pin Ceram
Features
2.7 - 3.6 volt operation Complete DTMF receiver Low power consumption Internal gain setting amplifier Adjustable guard time Central office quality Power-down mode Inhibit mode
ISSUE 2
May 1995
Functionally compatible with Mitel’s MT8870D.
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®
ISO2-CMOS MT88L70 3 Volt Integrated DTMF Receiver
Features
• • • • • • • • • 2.7 - 3.6 volt operation Complete DTMF receiver Low power consumption Internal gain setting amplifier Adjustable guard time Central office quality Power-down mode Inhibit mode
ISSUE 2
May 1995
Functionally compatible with Mitel’s MT8870D
Applications
• • • • • •
Paging systems
Repeater systems/mobile radio Credit card systems Remote control
Personal computers
Telephone answering machine
PWDN
IN + IN GS
m o .c U 4 t e e h S a t a .
MT88L70 Datasheet
