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AS2578 数据表(PDF) 1 Page - ams AG |
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AS2578 数据表(HTML) 1 Page - ams AG |
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1 / 22 page  Data Sheet Rev. 3 1 AS2578 /B March 1997 TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS Key Features u Low operating voltage u Low current consumption, standby ≤ 0.1 µA u Oscillator using Xtal or ceramic resonator (3.58MHz) u Serial interface to external EEPROM u Consistent, simple and usable procedures u The settings are programmed via the keyboard and stored in EEPROM or set by pin options Dialler: u Data protection with 20 digit FIFO u Sliding cursor protocol with comparison u Automatic pause generation u Temporary MF select via keyboard u 30 digit LNR (Last Number Redial) u 13 x 20 digit memory (RAM) on chip Tone Ringer: u Ring frequency discrimination u 3 tone melody with 4 different repetition rates u Volume of melodies can be set in 4 steps BlockDiagramme General Description The AS2578 /B are a versatile repertory LD/MF diallers with a melody generator, a ring frequency discriminator and a 2-wire interface to EEPROM. Together with the AS2520/1, the AS2578 /B form a coherent basis for a fully electronic telephone with a wide range of options. The AS2578 /B are especially designed to adapt to different PTT specifications. A RAM is on chip for last number redial, 3 direct dial and 10 numbers with abbreviated dialling. To allow easy use under a PABX, the device incorporates automatic pause insertion and sliding cursor procedure as selectable options (AS2578) or centrex keys (AS2578B). The device can be used with or without EEPROM as appropriate. When an EEPROM is connected, all RAM content is stored in the EEPROM by power loss. The circuit provides the possibility to set different modes of operation (LM codes) via the keyboard or via pin options, e.g. default signalling mode, automatic pause insertion, flash or ground loop and settings of volume and melodies. Austria Mikro Systeme International KEYSCAN HOOK STATE CONTROL DIAL DTMF MELODY SERIAL INTERFACE RING FREQUENCY DETECTOR POR OSCILLATOR REDIAL 13 X 20 1 X 30 RAM FIFO * 0 8 7 # 9 2 5 4 1 3 6 R MUTE SET LNR 3.58 MHz DP GL MUTE SCL SDA FCI MF MO MASK HS CE MODE AP (AS2578 only) MV RR AS2578 /B Vss VDD MEM M1 M2 M3 D C B A (AS2578B) Package Available in 28 pin DIP and PLCC. ® |
类似零件编号 - AS2578 |
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类似说明 - AS2578 |
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