Description
The M-985-01 is an integrated circuit precise tone detector for call progress and special information tones (SIT), as defined by CCITT.
The use of integrated circuit techniques allows the M-985-01 to pack the eight filters for call progress detection into a single 22-pin DIP or a 20-pin SOIC. A 3.58 MHz crystal-controlled time base guarantees accuracy and repeatability.
Features
⢠Precise detection of call progress tones
⢠Linear (analog) input
⢠Digital (CMOS compatible), tri-state outputs
⢠22-pin DIP and 20-pin SOIC
⢠Single supply 3 to 5 volt (low power CMOS)
⢠Inexpensive 3.58 MHz crystal time base
⢠Wide dynamic range (30 dB)
⢠Lower power consumption (power-down mode)
⢠425 Hz detection
⢠Special Information Tone (SIT) Detection
Applications
⢠Automatic dialers
⢠Dialing modems
⢠Traffic measurement equipment
⢠Test equipment
⢠Service evaluation
⢠Billing systems
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