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M-985-01S Folha de dados(PDF) 4 Page - Clare, Inc. |
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M-985-01S Folha de dados(HTML) 4 Page - Clare, Inc. |
4 / 8 page Truth Table Signal Present (fo) Mode OUT 1 OUT 2 OUT 3 OUT 4 D425 Strobe PD OE EN 350 Hz X 1 0 0 0 X 1 0 1 1 400 Hz (Note 1) 0 0 1 0 0 X 1 0 1 1 425 Hz X X X X X 1 1 0 1 1 440 Hz X 1 1 0 0 X 1 0 1 1 480 Hz X 0 0 1 0 X 1 0 1 1 620 Hz (Note 2) 1 1 0 1 0 X 1 0 1 1 950 Hz X 0 1 1 0 X 1 0 1 1 1400 Hz X 1 1 1 0 X 1 0 1 1 1800 Hz X 0 0 0 1 X 1 0 1 1 350 & 440 Hz X 1 0 0 1 X 1 0 1 1 350 & 480 Hz X 0 1 0 1 X 1 0 1 1 350 & 620 Hz (Note 2) 1/open 1 1 0 1 X 1 0 1 1 440 & 480 Hz X 0 0 1 1 X 1 0 1 1 440 & 620 Hz (Note 2) X 1 0 1 1 X 1 0 1 1 480 & 620 Hz (Note 2) X 0 1 1 1 X 1 0 1 1 Invalid Tone Combination X 1 1 1 1 X 1 0 1 1 Other (no detect) X 0 0 0 0 0 0 0 1 1 Any X 0 0 0 0 0 0 1 1 X Pin Functions Pin Function OUT 1 Active high tri-state output, per Truth Table. OUT 2 Active high tri-state output, per Truth Table. OUT 3 Active high tri-state output, per Truth Table OUT 4 Active high tri-state output, per Truth Table D425 Active high tri-state output, indicates 425 Hz detection. EN Active high enabled, when low drives STROBE low. OE Active high input. When low tri-states OUT n pins. SIGIN Analog signal input (internally capacitive coupled). STROBE Active high output, indicates valid OUT n or D425 VDD Most positive power supply input pin. VREF Internally generated mid-power supply voltage (output) V SS Most negative power supply input pin. X358 Buffered oscillator output (3.58 MHz). XIN Crystal oscillator or digital clock input. XOUT Crystal oscillator output. Used only with a crystal. Use X358 when clock output signal is required. XRANGE Active low input. Adds 10 dB of gain to input stage. MODE Selects 400/620 Hz detector frequency, 400 Hz when connected to V SS, 620 Hz when open. PD Power down operation, logic high inhibits internal clock. Internal pulldown resistor. MODE2 Tie high (V DD) for normal operation. Tie low or leave open to emulate M-982 operation. www.clare.com 4 M-985-01 Rev. 1 For example, dial tones shown in absolute Maximum Ratings Table on page 3, are usually “on” continuously and last until the first dial digit is received by the switch- ing system. Line Busy, on the other hand, is turned off and on at a rate of 1 Hz with a 50% duty cycle, or an interruption rate of 60 times per minute (60 IPM). The tones can be distinguished in this way. It should be noted that while such techniques will usually be effec- tive, there are some circumstances in which the M-985- 01 cannot be accurately used. Examples include situations where ringback tone may be short or not even encountered. Ringback may be provided at ring- ing voltage frequency (20 or 30 Hz) with some harmon- ics and may not fall in the detect range, and speech or other strong noise may obscure tones making cadence measurement difficult. Standards exist and should be consulted for your par- ticular application. In North America AT&Ts “Notes on the Network” or EIA’s RS-464 PBX standard should be reviewed. In Europe tone plans may vary with locale, in which case the CEPT administration in each country must be consulted. Outside these areas, national PTT organizations can provide information on the systems within their borders. |
Nº de peça semelhante - M-985-01S |
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Descrição semelhante - M-985-01S |
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