MT8880CN Zarlink Semiconductor, Inc., MT8880CN Datasheet
MT8880CN
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MT8880CN Summary of contents
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... V DD Ref SS ISO DS5431 MT8880CE MT8880CS MT8880CN MT8880CP ZarlinkZarlinkZarlink’s which provides low power dissipation and high reliability. The DTMF receiver is based upon the industry receiver; 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. A call progress fi ...
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MT8880C ISO -CMOS 1 20 IN+ VDD 2 19 IN- St/ ESt 17 VRef VSS D2 15 OSC1 OSC2 7 D0 TONE 13 8 IRQ/CP Φ2 R ...
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Functional Description The MT8880C Integrated DTMF architecture consists of a high performance DTMF receiver with internal gain setting amplifier and a DTMF generator which employs a burst counter such that precise tone bursts and pauses can be synthesized. A call ...
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MT8880C ISO -CMOS Steering Circuit Before registration of a decoded tone pair, the receiver checks for a valid signal duration (referred to as character recognition condition). This check is performed by an external RC time constant driven by ESt. ...
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Increasing t improves talk-off performance since REC it reduces the probability that tones simulated by speech will maintain a valid signal condition long enough to be registered. Alternatively, a relatively short t with a long t would be appropriate for ...
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MT8880C ISO -CMOS EVENTS A t REC V in ESt St/GT RX -RX DECODED TONE # (n- Read Status Register IRQ/CP of time segments is fixed at 32, however, by varying the segment length as ...
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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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MT8880C ISO -CMOS THD(%) = 100 V fundamental Equation 1. THD (%) For a Single Tone .... ...
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RS0 R/W FUNCTION 0 0 Write to Transmit Data Register 0 1 Read from Receive Data Register 1 0 Write to Control Register 1 1 Read from Status Register Table 2. Internal Register Functions BIT NAME FUNCTION b0 TOUT TONE ...
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MT8880C ISO -CMOS BIT NAME FUNCTION b0 BURST BURST MODE b1 TEST TEST MODE b2 S/D SINGLE /DUAL TONE GENERATION b3 C/R COLUMN/ROW TONES BIT NAME b0 IRQ b1 TRANSMIT DATA REGISTER EMPTY (BURST MODE ONLY) b2 RECEIVE DATA ...
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C1 R1 DTMF/CP INPUT R2 R5 X-tal DTMF OUTPUT Notes: R1 100 kΩ 374 kΩ 3.3 kΩ 10 4.7 MΩ 10 Ω (min.) R ...
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MT8880C ISO -CMOS 6802 IRQ Address VMA R/W E Data EXAMPLE 1: 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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MT8880C ISO -CMOS 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 ...
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AC Electrical Characteristics Characteristics 1 Lower freq. (ACCEPT) 2 Upper freq. (ACCEPT) 3 Lower freq. (REJECT) 4 Upper freq. (REJECT) 5 Call progress tone detect level (total power) † Characteristics are over recommended operating conditions unless otherwise stated ° ‡ ...
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MT8880C ISO -CMOS AC Electrical Characteristics Characteristics 28 Data hold time (write) 29 Input Capacitance (data bus) 30 Output Capacitance (IRQ/CP) 31 Crystal/clock frequency Clock input rise time Clock input duty cycle C ...
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R Φ2 Φ RS0 RWS R/W DATA BUS Φ RS0 t RWS R/W DATA BUS ISO t CYC Figure 17 - Φ2 Pulse t DDR t ...
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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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Package Outlines Dim D General- (lead coplanarity) A Notes Not ...
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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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