MT8840AS Mitel, MT8840AS Datasheet
MT8840AS
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MT8840AS Summary of contents
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... Modulator RxDO Demodulator DET CRx MT8840AE MT8840AS Description The MT8840 is a carrier over voice modem which allows simultaneous transfer of voice and data over a single pair of wires. Data is transferred on an amplitude shift keyed (ASK) 32 kHz carrier. On-chip filters remove voice frequency signals from the received composite voice and data signal prior to demodulation ...
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MT8840 ISO -CMOS Pin Description Pin # Name 1 DET Demodulator detection level adjust input (Analog). Internal resistor divider applies 2.36V in open circuit condition. Connection of external resistor will vary detect level. 2 CRx External AGC time constant ...
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Functional Description The MT8840 contains the demodulator circuitry for 32 kHz ASK signalling as well as a two-tone warbler (tone caller) to replace the function of the mechanical telephone ringer kHz carrier is 100% amplitude modulated by the ...
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MT8840 ISO -CMOS Micro- UART processor PCM Highway Micro- UART processor Analog To Switch Another SLIC Array Telephone (MT8804) Extension 5-6 Tx Data Tx MT8840 Summing Rx Data Rx Circuit Tx FILTER/ CODEC (MT896X) Rx Figure 3 - Digital ...
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Summing 2W/4W Telephone Converter line Figure 5 - Smart Telephone Set Block Diagram V DD OSC1 MT8840 OSC2 V SS When a single crystal is shared among a number of MT8840 devices, OSC1 and OSC2 should be a.c. coupled with ...
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MT8840 ISO -CMOS Absolute Maximum Ratings* Parameter 1 Supply Voltage 2 Voltage On Any Pin 3 Current On Any Pin 4 Storage Temperature 5 Package Power Dissipation * Exceeding these ratings may cause permanent damage. Functional operation under these ...
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A.C. Characteristics - V =5.0V± Characteristics 1 Crystal/Clock Frequency 2 Clock Input (OSC 1) 3 Rise Time 4 Fall Time Duty Cycle G 6 Clock Output (OSC Rise Time ...
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MT8840 ISO -CMOS A.C. Characteristics (Continued) Characteristics 44 D Inband Noise Rejection (S/ Attenuation to Voice Signals M 46 Detect Filter Detector Center Frequency Notes: 1. All A.C. parameters are based on a ...