MT8888CPR1 Zarlink Semiconductor, Inc., MT8888CPR1 Datasheet
MT8888CPR1
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MT8888CPR1 Summary of contents
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... MT8888CS1 MT8888CN1 MT8888CP1 MT8888CPR MT8888CSR MT8888CSR1 MT8888CPR1 The receiver section is based upon the industry standard MT8870 DTMF receiver while the transmitter utilizes a switched capacitor D/A converter for low distortion, high accuracy DTMF signalling. Internal counters provide a burst mode such that tone bursts can be transmitted with precise timing ...
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IN+ VDD 2 19 IN- St/ ESt 17 VRef VSS D2 15 OSC1 6 D1 OSC2 TONE 8 IRQ/ RS0 ...
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Pin Description (continued) Pin # Name ESt Early Steering output. Presents a logic high once the digital algorithm has detected a valid tone pair (signal condition). Any momentary loss of signal condition will cause ...
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MT8888C VOLTAGE GAIN ( Figure 3 - Single-Ended Input Configuration DIFFERENTIAL INPUT AMPLIFIER ...
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F LOW 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 941 Table 1 - Functional Encode/Decode Table Note: 0= LOGIC LOW, 1= LOGIC HIGH Following the filter section is a decoder employing digital ...
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This facility, together with the capability of selecting the steering time constants externally, allows the designer to tailor performance to meet a wide variety of ...
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V DD St/GT ESt V DD St/GT ESt The value device parameter (see AC Electrical Characteristics) and recognized by the receiver. A value for C1 of 0.1 µF is recommended for most ...
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EVENTS A t REC V in ESt St/GT RX -RX DECODED TONE # (n- Read Status Register IRQ/CP LEVEL (dBm) -25 MT8888C REC ID TONE TONE # ...
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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 VALID, ...
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The lookup table contains codes which are used by the switched capacitor D/A converter to obtain discrete and highly accurate DC voltage levels. Two identical circuits are employed to produce row and column tones, which are then mixed using a ...
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Single Tone Generation A single tone mode is available whereby individual tones from the low group or high group can be generated. This mode can be used for DTMF test equipment applications, acknowledgment tone generation and distortion measurements. Refer ...
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DTMF Clock Circuit The internal clock circuit is completed with the addition of a standard television color burst crystal. The crystal specification is as follows: Frequency: 3.579545 MHz ±0.1% Frequency Tolerance: Resonance Mode: Parallel Load Capacitance: 18pF Maximum Series ...
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RS0 RSEL b3 C/R 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 ...
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BIT NAME b0 BURST Burst Mode Select. A logic high deactivates burst mode; a logic low enables burst mode. When activated, the digital code representing a DTMF signal (see Table 1) can be written to the transmit register, which will ...
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Figure 14 - MT8888C Interface Connections for Various Intel Micros C1 R1 DTMF/CP INPUT R2 R5 X-tal DTMF OUTPUT C4 R Notes: R1 100 kΩ 374 kΩ 3.3 kΩ 10% ...
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MMD6150 (or equivalent) TEST POINT 130 pF 24 kΩ 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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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 permanent ...
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DC Electrical Characteristics (continued) Characteristics 17 Source current ESt and 18 Sink current St/Gt 19 Sink current IRQ/ CP † Characteristics are over recommended operating conditions unless otherwise stated. ° ‡ Typical figures are =5V and ...
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AC Electrical Characteristics - Voltages are with respect to ground (V Characteristics 1 Positive twist accept 2 Negative twist accept 3 Freq. deviation accept R 4 Freq. deviation reject X 5 Third tone tolerance 6 Noise tolerance 7 Dial ...
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AC Electrical Characteristics - Voltages are with respect to ground (V Characteristics 1 T Tone present detect time O 2 Tone absent detect time Delay Delay -RX 0 ...
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AC Electrical Characteristics - MPU Interface (continued)- Characteristics 13 Output Capacitance (IRQ/CP) † Characteristics are over recommended operating conditions unless otherwise stated ° ‡ Typical figures are and for design aid only: not ...
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For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in ...