MT8888CN Zarlink Semiconductor, Inc., MT8888CN Datasheet
MT8888CN
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MT8888CN Summary of contents
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... V DD Ref SS DS5432 MT8888CE MT8888CS MT8888CN The receiver section is based upon the industry standard transmitter converter for low distortion, high accuracy DTMF signalling. Internal counters provide a burst mode such that tone bursts can be transmitted with precise timing. A call progress filter can be selected allowing a microprocessor to analyze call progress tones ...
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MT8888C 1 IN VRef 4 5 VSS OSC1 6 OSC2 7 TONE PIN PLASTIC DIP/SOIC Pin Description Pin # Name IN+ Non-inverting op-amp input ...
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Functional Description The MT8888C Integrated DTMF consists of a high performance DTMF receiver with an internal gain setting amplifier and a DTMF generator which employs a burst counter to synthesize precise tone bursts and pauses. A call progress mode can ...
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MT8888C Following the filter section is a decoder employing digital counting techniques to frequencies of the incoming tones and to verify that they correspond to standard DTMF frequencies. A complex averaging algorithm protects against tone simulation by extraneous signals such ...
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selected by the designer. Different steering arrangements may be used to select independent tone present (t tone absent (t ) guard times. This may be GTA necessary to meet system specifications which place both accept ...
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MT8888C EXPLANATION OF EVENTS A) TONE BURSTS DETECTED, TONE DURATION INVALID, RX DATA REGISTER NOT UPDATED. B) TONE #n DETECTED, TONE DURATION VALID, TONE DECODED AND LATCHED IN RX DATA REGISTER. C) END OF TONE #n DETECTED, TONE ABSENT DURATION ...
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Burst Mode In certain telephony applications it is required that DTMF signals being generated are of a specific duration determined either by application or by any one of the exchange transmitter specifications currently existing. Standard DTMF signal timing can be ...
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MT8888C The Fourier components of correspond to V .... V as measured on the output 2f nf waveform. The total harmonic distortion for a dual tone can be calculated using Equation 2. V correspond to the low group amplitude and ...
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MT8888C 9 ...
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BIT NAME b0 TOUT Tone Output Control. A logic high enables the tone output; a logic low turns the tone output off. This bit controls all transmit tone functions. b1 CP/DTMF Call Progress or DTMF Mode Select. A logic high ...
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MT8888C BIT NAME b0 IRQ b1 TRANSMIT DATA REGISTER EMPTY (BURST MODE ONLY) b2 RECEIVE DATA REGISTER FULL b3 DELAYED STEERING 8031/8051 8080/8085 Figure 12 - MT8888C Interface Connections for Various Intel Micros C1 R1 DTMF/CP INPUT R5 DTMF OUTPUT ...
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MMD6150 (or equivalent) TEST POINT 130 Test load for D0-D3 pins A software reset must be included at the beginning of all programs to initialize the control registers after power up.The initialization procedure should be implemented 100ms ...
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MT8888C Absolute Maximum Ratings Parameter 1 Power supply voltage Voltage on any pin 3 Current at any pin (Except V DD and 4 Storage temperature 5 Package power dissipation * Exceeding these values may cause ...
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Electrical Characteristics Gain Setting Amplifier - Voltages are with respect to ground (V Characteristics 1 Input leakage current 2 Input resistance 3 Input offset voltage 4 Power supply rejection 5 Common mode rejection 6 DC open loop voltage gain 7 ...
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MT8888C AC Electrical Characteristics Characteristics 1 Accept Bandwidth 2 Lower freq. (REJECT) 3 Upper freq. (REJECT) 4 Call progress tone detect level (total power) † Characteristics are over recommended operating conditions unless otherwise stated ‡ Typical figures are at 25 ...
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AC Electrical Characteristics Characteristics 1 RD/WR clock frequency 2 RD/WR cycle period 3 RD/WR rise and fall time 4 Address setup time 5 Address hold time 6 Data hold time (read valid data delay (read) 8 RD, ...
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MT8888C RD/WR RD CS, RS0 DATA BUS Figure 17 - 8031/8051/8085 Read Timing Diagram WR CS, RS0 DATA BUS Figure 18 - 8031/8051/8085 Write Timing Diagram 17 t CYC PWH t PWL Figure 16 - ...
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Package Outlines Notes Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) Plastic Dual-In-Line Packages (PDIP Suffix 8-Pin DIM Plastic Min Max A 0.210 (5.33) A 0.115 (2.92) ...
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Notes Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) Plastic Dual-In-Line Packages (PDIP Suffix 22-Pin DIM Plastic Min Max A 0.210 (5.33) A 0.125 (3.18) 0.195 ...
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16-Pin DIM Min Max Min A 0.093 0.104 0.093 (2.35) (2.65) (2.35) A 0.004 0.012 0.004 1 (0.10) (0.30) (0.10) B 0.013 0.020 0.013 (0.33) (0.51) (0.33) C 0.009 0.013 0.009 (0.231) (0.318) (0.231) D 0.398 0.413 ...
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Small Shrink Outline Package (SSOP Suffix Pin Notes: 1) Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) 4) Ref. JEDEC Standard M0-150/M0118 for 48 Pin 5) A ...
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