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