mt8981dl Mitel, mt8981dl Datasheet
mt8981dl
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mt8981dl Summary of contents
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... Parallel STi2 Converter STi3 ISO-CMOS ST-BUS MT8981DC MT8981DE MT8981DP MT8981DL Description This VLSI ISO-CMOS device is designed for switching PCM-encoded voice or microprocessor exchange, PBX or Central Office. It provides simultaneous connections for up to 128 64 kbit/s channels. Each of the four serial inputs and outputs consist kbit/s channels multiplexed to form a 2048 kbit/s ST-BUS stream ...
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MT8981D ISO-CMOS STi3 VDD 12 F0i 13 C4i PIN PLCC Pin Description Pin # Name DIP PLCC QFP 1 2 ...
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Pin Description (continued) Pin # Name DIP PLCC QFP C4i 4.096 MHz Clock (Input). ST-BUS bit cell boundaries lie on the alternate falling edges of this clock. 13- 15- 9-11 A0-A2 Address 0 to ...
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... In recent years, there has been a trend in telephony towards digital switching, particularly in association with software control. Simultaneously, there has been a trend in system architectures towards distributed processing or multi-processor systems. In accordance with these trends, MITEL has devised the ST-BUS (Serial Telecom Bus). architecture can be used both in software-controlled digital voice and ...
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Control Register, which may be written to or read from via the Control Interface. The lower order bits come from the address lines directly. The Control Register also allows the chip to broadcast messages on all ST-BUS outputs (i.e., to ...
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MT8981D ISO-CMOS 7 7 BIT NAME 2 Message When 1, the contents of the corresponding location in Connection Memory Low are Channel output on the location’s channel and stream. When 0, the contents of the corresponding location in Connection Memory ...
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If bit 6 of the Control Register is 0, then bits 2 and 0 of each Connection Memory High location function normally (see Fig. 5). If bit the associated ST- BUS output channel is in Message Mode; ...
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MT8981D ISO-CMOS Speech Switch - 8981 Controlling Micro- Processor Control & Signalling - 8981 Figure 8 - Example Architecture of a Simple Digital Switching System Application Circuit with 6802 Processor Fig. 10 shows an example of a complete circuit which ...
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D7-D0 A15-A0 MEK6802D3 System R/W MR VMA E DTA 1 40 STi0 2 39 STi1 3 38 STi2 4 37 909 , STi3 8981 5V VDD 10 ...
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MT8981D ISO-CMOS Absolute Maximum Ratings* Parameter Voltage on Digital Inputs 3 Voltage on Digital Outputs 4 Current at Digital Outputs 5 Storage Temperature 6 Package Power Dissipation * Exceeding these values may cause ...
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AC Electrical Characteristics Characteristics 1 Clock Period* 2 Clock Width High I 3 Clock Width Low Clock Transition Time Frame Pulse SetupTime S 6 Frame Pulse Hold Time 7 Frame Pulse Width † Timing ...
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MT8981D ISO-CMOS AC Electrical Characteristics Characteristics 1 STo0/3 Delay - Active to High Z 2 STo0/3 Delay - High Z to Active STo0/3 Delay - Active to Active STo0/3 Hold Time U 5 Output ...
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AC Electrical Characteristics Characteristics 1 Chip Select Setup Time 2 Read/Write Setup Time 3 Address Setup Time 4 Acknowledgement Delay Fast Slow 5 Fast Write Data Setup Time 6 Slow Write Data Delay 7 Read Data Setup Time 8 Data ...
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MT8981D ISO-CMOS NOTES: 2-30 ...