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SA2531B Datasheet(PDF) 1 Page - Sames |
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SA2531B Datasheet(HTML) 1 Page - Sames |
1 / 24 page sames SA2531 A/B/C/E/G/U 1/24 VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER sames SA2531 A/B/C/D/E/F/G/J/U s Speech circuit, LD/MF Repertory Dialler and Tone Ringer on one 28 pin CMOS chip s Net 4 compatible s Soft clip to avoid harsh distortion s Line Loss Compensation selectable by pin option s Power down mode s Versatile applications for different PTT demands s 31 digit last number redial s Sliding Cursor protocol with comparison s 2 Flash keys, 100 ms and 280 ms (option 600 ms) s Ring frequency discrimination s Operating range from 13 to 100 mA (down to 5 mA with reduced perform- ance) s Volume control of receive signalExcept "D") s Low noise (max. -72dBmp) s Real or Complex impedance on chip pro- grammable s LD/MF switchable dialling s 14 memories, 4 direct/10 indirect or 10 direct s Pause key for 2, 3 or 6 sec Auto Pause or Wait function s On chip MF filter (CEPT CS 203 compat- ible) s 3-tone melody generator FEATURES M82-2013 PDS039-SA2531-001 Rev.D 15-05-97 GENERAL DESCRIPTION The SA2531 is a CMOS integrated circuit that contains all the functions needed to form a high performance electronic telephone. The device incorporates LD/MF repertory dialling, melody generation, ring frequency discrimination and a high quality speech circuit. A RAM is on chip for a 31 digit last number redial and 14 memories each containing up to 21 digits. The sliding cursor procedure makes Last Number Redial easy behind a PABX. The SA2531 (exept the SA2531D) incorporates a volume control for the earpiece. The receive volume can be controlled by the VOL key (+4dB) or by the +/- keys (+6dB/-4dB in 5 steps). The versatility of the circuit is provided by on chip programmability and a few external components. This allows easy adaption to different PTT requirements without changing the PCB of the telephone. |
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