AS2540Q AMSCO [austriamicrosystems AG], AS2540Q Datasheet
AS2540Q
Related parts for AS2540Q
AS2540Q Summary of contents
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Data Sheet AS2540 Remote Controlled Single-Chip-Telephone AS2540 General Description The AS2540 is a CMOS integrated circuit that incorporates a speech circuit (line-adaptation, 2/4-wire conversion, separate Rx- and Tx-amplifiers for handset and modem), MF dialler, ring frequency detector, ring melody generator ...
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Data Sheet AS2540 Pin Description Pin # Symbol 15 RFD ing requency Schmitt trigger input for ring frequency discrimination. Disabled during off-hook ine Current ense Input Input for sensing the line current 5 ...
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Data Sheet AS2540 Pin # Symbol 25 OSC O scillator Input Input for ceramic resonator 3.58MHz. Recommended type: Murata CSA 3.58MG312AM or compatible 12 AGND A G nalogue round Special ground for the internal amplifiers 26 RXD R D eceive ...
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Data Sheet AS2540 Functional Description Modes of operation There are 4 possible modes: Idle Mode Manual hook-switch and electronic hook-switch (e.g. relay) is open (MHS EHS = logical 0), no ring signal is applied, the oscillator is stopped, signalling via ...
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Data Sheet AS2540 The DC characteristic is determined by the voltage at LI pin and a 30 resistor between LI and LS pin. It can be calculated by the following equation The t.m. voltage ...
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Data Sheet AS2540 Serial interface The communication principle is derived from a standard UART: - Baud Rate 9600 - Start Bit 1 - Data Bits 8 - Parity None - Stop Bit 1 - LSB is transferred prior to MSB ...
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Data Sheet AS2540 ...
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Data Sheet AS2540 <Line Event> Message <LineEvent> message format MSB ...
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Data Sheet AS2540 The MF output levels are set to -4/-6dB which should allow efficient backup dialling under all line conditions. The TONE/PAUSE ratio is 90ms/90ms. The preemphasis between low group and high group frequencies is t.m. 2.6dB. FLASH timing ...
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Data Sheet AS2540 Timing diagrams (unscaled) Dialling - MF mode Revision 3.1 austriamicrosystems Page ...
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Data Sheet AS2540 Electrical characteristics Electrical characteristics are measured with the Test Circuit application. Typical mean values will not be tested. Absolute maximum ratings Positive Supply Voltage Input Current Input Voltage (LS) Input Voltage (LI, CS) Input Voltage (STB, RI) ...
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Data Sheet AS2540 Transmit characteristics Symbol Parameter A Transmit Gain MTX M1/M2 —> Transmit Gain TTX TIT —> LS THD Distortion V Soft Clip Level AGC M1/M2 —> Soft Clip Overdrive SCO M1/M2 Z ...
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Data Sheet AS2540 LD characteristics Symbol Parameter t(td) Flash Duration DTMF characteristics Symbol Parameter V Tone Level Low Group MFlow LS Preemphasis L-H V L-H UFC Unwanted Frequency Components Frequency Deviation f t(td) Tone Duration t(itp) Inter Tone Pause t(mo) ...
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Data Sheet AS2540 Serial Interface Symbol Parameter t RXD signal rise time RXD-r t RXD signal fall time RXD-f V Input comparator level at comp RXD BR RXD baud rate RXD BR TXD baud rate TXD Miscellaneous Symbol Parameter t ...
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Data Sheet AS2540 Typical Application Revision 3.1 austriamicrosystems Page ...
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Data Sheet AS2540 Test Circuit C6 100u C11 R8 D1 600 10n 10V ILine AC Revision 3 RFD 330k 10u 300 C7 2 STB ...
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... Revision 3.1 Ordering Information Number Package AS2540T SOIC28 AS2540Q Dice-on-Foil Devices sold by austriamicrosystems AG are covered by the warranty and patent identification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement ...
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Data Sheet AS2540 Contact Headquarters austriamicrosystems AG Communications Business Unit A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 525 01 www.austriamicrosystems.com Sales Offices Germany austriamicrosystems Germany GmbH Tegernseer Landstrasse 85 D-81539 München, Germany ...