MT88E45AS Mitel, MT88E45AS Datasheet
MT88E45AS
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MT88E45AS Summary of contents
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... Detector 2130Hz PWDN Bandpass Tone CASen Detection Algorithm 2750Hz Bandpass CASen CB2 CB1 Figure 1 - Functional Block Diagram MT88E45 (4-Wire CNIC2) ISSUE 2 Ordering Information MT88E45AS 20 Pin SOIC - architectural implementation. MODE Data Timing Recovery DR STD Guard Time March 1999 FSK DATA DCLK CD DR/STD ...
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MT88E45 Pin Description Pin # Name 1 V Voltage Reference (Output). Nominally Vdd/ used to bias the Tip/Ring and Hybrid input REF op-amps. 2 IN1+ Tip/Ring Op-amp Non-inverting (Input). 3 IN1- Tip/Ring Op-amp Inverting (Input). 4 GS1 Tip/Ring ...
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Advance Information Pin Description Pin # Name 10 DATA 3-wire FSK Interface Data (CMOS Output). Mark frequency corresponds to logical 1. Space frequency corresponds to logical 0. In mode 0 (when the CB0 pin is logic low) the FSK serial ...
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MT88E45 FSK CB0 CB1 CB2 Interface 0 Set by CB0 FSK Demodulation. Tip/Ring input (GS1) selected. DR/STD is DR. 0 Set by CB0 Hybrid CAS Detection. Hybrid Receive input (GS2) selected. DR/STD is STD. 0/1 0 ...
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Advance Information CNAM (Calling Name Delivery), VMWI (Visual Message Waiting Indicator) and CIDCW (Calling Identity Delivery on Call Waiting). In Europe, Caller ID requirements are defined by ETSI. The CPE documents are ETS 300 778-1 for on-hook, ETS 300 778-2 ...
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MT88E45 CAS detection only, its gain can always be tailored specifically for the CAS signal level. The FSK demodulator is compatible with Bellcore, ETSI and BT standards. The demodulated FSK data is either output directly (bit stream mode) or stored ...
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Advance Information 2130 Hz and 2750 Hz CAS/DT-AS Characteristics Frequency Tolerance Signal Level (per tone) Reject Level (per tone) Maximum Twist ( 2130Hz 2750Hz Duration Reject Duration Signal to Noise Ratio Hybrid Op-amp (GS2) Gain Vdd = 5V ...
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MT88E45 Both Tones Present CAS t DP EST t GP ST/GT STD Figure 5 - CAS Guard Time Circuit Operation Tone present guard time (t ) operation: In Figure 5 GP initially there is no CAS, EST is low so ...
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Advance Information Parameter Mark (Logical 1) Frequency Space (Logical 0) Frequency Received Signal Level Signal Reject Level Transmission Rate Twist ( MARK SPACE Signal to Noise Ratio Tip/Ring Op-Amp (GS1) Gain Vdd = 5V +/- 10% Tip/Ring Op-Amp ...
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MT88E45 FSK Data Interface The MT88E45 provides a powerful dual mode 3-wire interface so that the data bytes in the demodulated FSK bit stream can be extracted without the need either for an external UART or for the CPE’s microcontroller ...
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Advance Information activated released when there is no activity at the FSK bandpass filter output for 10ms. When CD is inactive (high), the raw output of the FSK demodulator is ignored by the internal data timing recovery circuit. ...
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MT88E45 Application Circuits TIP RING Microcontroller = From Microcontroller (FSK Interface Mode 1 selected) R15 is required only if both FSK interface mode 0 and power down features are used. Unless stated ...
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Advance Information 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.668 0.65 0.60 0.55 0.531 0.50 3.0 Figure 8 - Gain Ratio as a Function of Nominal Vdd Gain Setting Resistor Calculation Example for Figure 8: • For the desired nominal ...
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MT88E45 Interrupt Source 1 INT1 (Open Drain) Interrupt Source 2 INT2 (CMOS) MT88E45 DR/STD (CMOS) Figure 9 - Application Circuit: Multiple Interrupt Source 14 Vdd Vdd Resistor (R2) Resistor (R1 can be opened and D1 shorted if the ...
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Advance Information Absolute Maximum Ratings* Parameter 1 Supply voltage with respect Voltage on any pin other than supplies 3 Current at any pin other than supplies 4 Storage Temperature * Exceeding these values may cause permanent damage. ...
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MT88E45 DC Electrical Characteristics Characteristics 8 DCLK Output Low Sink DATA Current DR/STD CD, EST ST/GT 9 Input Current IN1+ IN1- IN2+ IN2- DCLK CB0 CB1 CB2 10 GT Output High- Impedance Current 11 V Output Voltage REF 12 Output ...
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Advance Information AC Electrical Characteristics Characteristics 1 Accept Signal Level Range 2 Bell 202 Format Reject Signal Level 3 Transmission Rate 4 Mark and Space Frequencies Bell 202 1 (Mark) Bell 202 0 (Space) CCITT V.23 1 (Mark) CCITT V.23 ...
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MT88E45 AC Electrical Characteristics Characteristics 1 Tone present detect time 2 Tone absent detect time † AC Electrical Characteristics are over recommended operating conditions unless otherwise stated. AC Electrical Characteristics Characteristics 1 Power-up time OSC2 2 Power-down time 3 Input ...
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Advance Information AC Electrical Characteristics Characteristics 1 Frequency 2 Duty cycle DCLK 3 Rise time 4 DCLK low set DCLK DR/STD 5 DCLK low hold time after DR † AC Electrical Characteristics are over recommended operating conditions ...
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MT88E45 DATA DCLK Figure 10 - DATA and DCLK Mode 0 Output Timing DR DCLK CDD DCD Figure Output Timing t R1 Figure 12 ...
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Advance Information start TIP/RING (A/B) WIRES stop t start DATA (Output) stop DCLK (Output (Output) Figure 13 - ...
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MT88E45 1st Ring TIP/RING B A PWDN Note 2 Note OSC2 FSKen Note Note 5 DCLK DATA Figure 15 - Application Timing for Bellcore On-hook Data Transmission Associated with Ringing, Notes: This on-hook case ...
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Advance Information CPE goes off-hook TIP/RING CAS Note 1 PWDN Note 8 Hybrid CASen Note 8 FSKen Note 2 Note OSC2 t DP EST t GP ST/GT t REC STD Note 9 Note Note ...
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MT88E45 Line Reversal ‘Idle State Tone Alert Signal’ DT-AS A/B Wires A B PWDN Note 6 Tip/Ring CASen t Note 6 DP EST t GP Note 1 ST/GT t REC STD Note 7 15 1ms TE DC load <120 A ...
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Advance Information Line Reversal (Optionally sent) Ring Burst A/B Wires A Note 1 PWDN 250-400ms Note load TE AC load FSKen Note Note 4 DCLK DATA t PU OSC2 Figure 18 - Application Timing ...
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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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... Mitel. This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specifi ...