MT8976AC Mitel, MT8976AC Datasheet
MT8976AC
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MT8976AC Summary of contents
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... CSTi1 Control Interface CSTo XCtl Control Logic XSt ISO-CMOS ST-BUS MT8976AC MT8976AE MT8976AP Description The MT8976 is Mitel’s second generation T1 interface solution. The MT8976 meets the Extended Super Frame format (ESF), the current D3/D4 format and is compatible with SLC-96 systems. The MT8976 interfaces to DS1 1.544 Mbit/sec digital trunk ...
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MT8976 ISO-CMOS 1 TxA 28 VDD 2 TxB DSTo 26 F0i E1.5i 5 RxA 24 C1. RxB RxSF 7 RxD 22 TxSF 8 CSTi1 21 C2i 9 TxFDL 20 RxFDL 10 TxFDLClk ...
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Pin Description (Continued) Pin # Name DIP PLCC 12 19 CSTi0 Control ST-BUS Input #0. A 2048 kbit/s serial control stream that contains 24 per channel control words and two master control words E8Ko Extracted 8 kHz Output. ...
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MT8976 ISO-CMOS Functional Timing Diagrams C2i DSTi DSTo CSTi0/CSTi1 CSTo E1. INT DATA DS1 AMI LINE SIGNAL RxA RxB RxD E8Ko C1.5i INT DATA TxA TxB DS1 AMI LINE SIGNAL 4-32 125 ...
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MT8976 ISO-CMOS 4-33 ...
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... MT8976 via 2048 kbit/s serial streams conforming to Mitel’s ST-BUS format. The ST-BUS is a TDM serial bus that operates at 2048 kbits/s. The serial streams are divided into 125 µsec frames that are made bit channels. A serial stream that is made up of these 32 8 bit ...
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Bit Name 7 Debounce When set the received and D signalling bits are reported directly in the per channel status words output at CSTo. When clear, the signalling bits are debounced for before ...
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MT8976 ISO-CMOS Bit Name 7 RMLOOP Remote Loopback. When set, the data received at RxA and RxB is looped back to TxB and TxA respectively. The data is clocked into the device with E1.5i. The device still monitors the received ...
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Frame # FPS FDL CRC CB1 CB2 CB3 CB4 ...
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MT8976 ISO-CMOS Frame † Resynchronization ...
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Bipolar Violation Counter The Bipolar Violation bit in Master Status Word 1 will toggle after 256 violations have been detected in the received signal. It has a maximum refresh time of 96 ms. This means that the bit can not ...
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MT8976 ISO-CMOS Bit Name 7 YLALR Yellow Alarm Indication. This bit is set when the chip is receiving bit position 2 of every DS0 channel. 6 MIMIC This bit is set if the frame search algorithm found ...
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Received Signalling Bits The and D signalling bits are output from the device in the 24 Per Channel Status Words. Their location in the serial steam output at CSTo is shown in Figure 6 and the bit ...
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MT8976 ISO-CMOS Hunt Mode Candidate Candidate Verify Candidate In sync New Frame Position * Note: Only when in ESF mode and CRC option is enabled. Figure 8 - Off-Line Framer State Diagram pointer and the ST-BUS read pointer will begin ...
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Framing Algorithm In ESF mode, the framer searches for a correct FPS pattern. Figure 8 shows a state diagram of the framing algorithm. The dotted lines show which feature can be switched in and out depending upon the operating mode ...
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MT8976 ISO-CMOS 50 Percentage Reframe Time Probability Versus Reframe Time AAA AAA AAA AAA 40 AAA AAA AAA AAA AAA AAA AAA AAA AAA AAA AAA % AAA 30 AAA AAA AAA AAA AAA AAA AAA AAA AAA AA AAA ...
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... Mitel also manufactures a thick film hybrid device, the MH89760/760B, which incorporates the line driver, receiver and clock extractor circuitry. second SIP hybrid, the MH89761, provides the ...
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MT8976 ISO-CMOS Absolute Maximum Ratings* Parameter 1 Power Supplies with respect Voltage on any pin other than supplies 3 Current at any pin other than supplies 4 Storage Temperature 5 Package Power Dissipation * Exceeding these values ...
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AC Electrical Characteristics Characteristics 1 C2i Clock Period 2 C2i Clock Width High or Low 3 Frame Pulse Setup Time 4 Frame Pulse Hold Time 5 Frame Pulse Width 6 RxSF Output Delay 7 TxSF Hold Time 8 TxSF Setup ...
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MT8976 ISO-CMOS AC Electrical Characteristics Characteristics 1 E1.5i Clock Period 2 E1.5i Clock Width High or Low † Timing is over recommended temperature & power supply voltage ranges. ‡ Typical figures are and are for design aid ...
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AC Electrical Characteristics Parameters 1 External Control Delay 2 External Status Setup Time 3 External Status Hold Time 4 8 kHz Output Delay 5 8 kHz Output Low Width 6 8 kHz Output High Width 7 8 kHz Rise Time ...
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MT8976 ISO-CMOS AC Electrical Characteristics Parameters 1 Transmit Steering Delay 2 Transmit Steering Transition Time 3 Received Steering Setup Time 4 Received Steering Hold Time 5 Received Data Setup Time 6 Received Data Hold Time 7 C1.5i Period 8 C1.5i ...
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AC Electrical Characteristics Parameters 1 Transmit FDL Setup Time 2 Transmit FDL Hold Time 3 Receive FDL Output Delay 4 Receive FDL Clock Delay 5 Transmit FDL Clock Delay † Timing is over recommended temperature & power supply voltage ranges. ...
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MT8976 ISO-CMOS CHANNEL CHANNEL • • • • • • • • NB: Numbering BIT 7 differs from Fig 24. Figure 23 - Format of 2048 kbit/s ST-BUS Streams CHANNEL CHANNEL S Bit 24 1 (1/1.544) s NB: ...
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Appendix Control and Status Register Summary 7 6 Debounce TSPZCS B8ZS 1 Disabled 1 Disabled 1 B8ZS 0 Enabled 0 Enabled 0 Jammed Bit Master Control Word 1 (Channel 15, CSTi0) RMLOOP DGLOOP ALL 1’s 1 Enabled 1 Enabled 1 ...
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MT8976 ISO-CMOS NOTES: 4-54 ...