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MFG:MIT
Part Number: MT8985
MFG: MIT
Description: The MT8985 Enhanced Digital Switch device is an upgraded version of the popular MT8980D Digital
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MT8985
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DataSheet
General Description
MT8985 General Description
The MT8985 Enhanced Digital Switch device is an upgraded version of the popular MT8980D Digital Switch (DX). It is pin compatible with the MT8980D and retains all of the MT8980D's functionality. This VLSI device is designed for switching PCM-encoded voice or data, under microprocessor control, in digital exchanges, PBXs and any ST-BUS/MVIP environment. It provides simultaneous connections for up to 256 64 kb/s channels. Each of the eight serial inputs and outputs consist of 32 64 kbit/s channels multiplexed to form a 2048 kbit/s stream. As the main function in switching applications, the device provides per-channel selection between variable or constant throughput delays. The constant throughput delay feature allows grouped channels such as ISDN H0 to
be switched through the device maintaining its sequence integrity. The MT8985 is ideal for medium sized mixed voice/data switch and voice processing applications.
MT8985 Maximum Ratings
| Parameter |
Symbol |
Min. |
Max. |
Units | |
| 1 | VDD - VSS |
-0.3 |
7 |
V | |
| 2 | Voltage on Digital Inputs |
VI |
VSS-0.3 |
VDD+0.3 |
V |
| 3 | Voltage on Digital Outputs |
VO |
VSS-0.3 |
VDD+0.3 |
V |
| 4 | Current at Digital Outputs |
IO |
40 |
mA | |
| 5 | Storage Temperature |
TS |
-65 |
+150 |
°C |
| 6 | Package Power Dissipation |
PD |
2 |
W |
MT8985 Features
• 256 x 256 channel non-blocking switch
• Programmable frame integrity for wideband channels
• Automatic identification of ST-BUS/GCI interface backplanes
• Per channel tristate control
• Patented message mode
• Non-multiplexed microprocessor interface
• Single +5 volt supply
• Available in DIP-40, PLCC-44 and QFP-44 packages
• Pin compatible with MT8980 device
• Programmable frame integrity for wideband channels
• Automatic identification of ST-BUS/GCI interface backplanes
• Per channel tristate control
• Patented message mode
• Non-multiplexed microprocessor interface
• Single +5 volt supply
• Available in DIP-40, PLCC-44 and QFP-44 packages
• Pin compatible with MT8980 device
MT8985 Typical Application
• Medium size digital switch matrices
• Hyperchannel switching (e.g., ISDN H0)
• ST-BUS/MVIP™ interface functions
• Serial bus control and monitoring
• Centralized voice processing systems
• Data multiplexer
• Hyperchannel switching (e.g., ISDN H0)
• ST-BUS/MVIP™ interface functions
• Serial bus control and monitoring
• Centralized voice processing systems
• Data multiplexer
MT8985
PDF/DataSheet Download
- Datasheet: MT8985
- File Size: 687676 KB
- Manufacturer: Zarlink
- Click here to Download
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MT8985 Relative Products
MT8982AE
The MT8982AE Small Digital Switch (MiniDX) is a nonblocking CMOS time switch with a capacity of up to 64 - 8 bit Time Division Multiplexed (TDM) encoded voice or data channels. MT8982AE is a size-optimized version of MITEL's successful MT8980D Digital Switch...
MT8982
The MT8982 Small Digital Switch (MiniDX) is a nonblocking CMOS time switch with a capacity of up to 64 - 8 bit Time Division Multiplexed (TDM) encoded voice or data channels. MT8982 is a size-optimized version of MITEL's successful MT8980D Digital Switches, ...
MT8981DP
The MT8981DP is a kind of VLSI ISO-CMOS device which is designed for switching PCM-encoded voice or data, under microprocessor control, in a modern digital exchange, PBX or Central Office. The device provides simultaneous connections for up to 128 64 kbit/s ...
MT8981DE
The MT8981DE is designed as the VLSI ISO-CMOS device that provides microprocessor read and write access to individual ST-BUS channels. Features of this MT8981DE are:(1)Mitel ST-BUS compatible; (2)4-line x 32-channel inputs; (3)4-line x 32-channel outputs; (4...
MT8981DC
The MT8981DC is designed as the VLSI ISO-CMOS device that provides microprocessor read and write access to individual ST-BUS channels. Features of this MT8981DC are:(1)Mitel ST-BUS compatible; (2)4-line x 32-channel inputs; (3)4-line x 32-channel outputs; (4...
MT8981D
This VLSI ISO-CMOS device MT8981D 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 ...
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