M-980 General Purpose Call Progress Tone Detector by Teltone
DESCRIPTION: The Teltone® M-980 is an integrated circuit tone detector for general purpose use in automatic following of switched
telephone calls. The circuit uses low-power CMOS techniques
to provide the complete filtering and control required
for this function. The basic timing of the M-980 is designed
to permit operation with almost any progress tone system.
The use of integrated circuit techniques allows the M-980
to pack the complete frequency and amplitude portion of
call progress following into a single 8-pin DIP. A 3.58 MHz
crystal-controlled time base guarantees accuracy and repeatability.
FEATURES:
- Covers the 315 to 640 Hz range (common call progress)
- Sensitivity to -38 dBm
- Dynamic range over 36 dB
- 40 ms minimum detect (50 ms to output)
- 8-pin DIP
- Single supply CMOS (low power)
- Supply range 4.5 to 5.5 VDC
- Inexpensive 3.58-MHz time base
APPLICATIONS:
- Automatic dialers
- Dialing modems
- Traffic measurement equipment
- Test equipment
- Service evaluation
- Billing systems
These parts are new and unused.
