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MT8981DL Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MT8981DL Datasheet(HTML) 1 Page - Mitel Networks Corporation |
1 / 14 page 2-17 ® Features • Mitel ST-BUS compatible • 4-line x 32-channel inputs • 4-line x 32-channel outputs • 128 ports non-blocking switch • Single power supply (+5 V) • Low power consumption: 30 mW Typ. • Microprocessor-control interface • Three-state serial outputs Description This VLSI ISO-CMOS device is designed for switching PCM-encoded voice or data, under microprocessor control, in a modern digital 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 of 32 64 kbit/s channels multiplexed to form a 2048 kbit/s ST-BUS stream. In addition, the MT8981 provides microprocessor read and write access to individual ST-BUS channels. Figure 1 - Functional Block Diagram STo0 STo1 STo2 STo3 Serial to Parallel Converter Data Memory Frame Counter Control Register Control Interface Output MUX Connection Memory Parallel to Serial Converter CS R/W A5/ A0 DTA D7/ D0 C4i F0i VDD VSS ODE STi0 STi1 STi2 STi3 DS ISSUE 6 May 1995 MT8981D Digital Switch ISO-CMOS ST-BUS ™ FAMILY Ordering Information MT8981DC 40 Pin Ceramic DIP MT8981DE 40 Pin Plastic DIP MT8981DP 44 PLCC MT8981DL 44 Pin QFP -40°C to +85°C |
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