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MT89L85AN

更新时间： 2024-11-20 22:49:59
品牌 Logo 应用领域
MITEL 开关
页数 文件大小 规格书
20页 136K
描述
CMOS ST-BUS⑩ FAMILY Enhanced Digital Switch

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中文翻译

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MT89L85AN 数据手册

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CMOS ST-BUS FAMILY  
MT89L85  
Enhanced Digital Switch  
Advance Information  
DS5194  
ISSUE 2  
September 1999  
Features  
Ordering Information  
MT89L85AP 44 Pin PLCC  
MT89L85AN 48 Pin SSOP  
•
•
•
•
3.3 volt supply  
5V tolerant inputs and TTL compatible outputs  
256 x 256 channel non-blocking switch  
-40°C to +85°C  
Programmable frame integrity for wideband  
channels  
•
Automatic identification of ST-BUS/GCI  
interface backplanes  
Description  
•
•
•
•
•
•
Per channel tristate control  
The MT89L85 Enhanced Digital Switch device is an  
upgraded 3-volt version of the MT8985 Digital  
Switch. It is pin compatible with the MT8985 and  
retains all of the MT8985's functionality. The  
enhanced digital swtich 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 64kb/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 MT89L85 is ideal for medium sized  
mixed voice/data switch and voice processing  
applications.  
Patented message mode  
Non-multiplexed microprocessor interface  
Available in PLCC-44 and SSOP-48 packages  
Pin compatible with MT8985 device  
Low power consumption  
Applications  
•
•
•
•
•
•
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  
**  
ODE  
V
V
F0i RESET  
C4i  
SS  
DD  
Frame  
Counter  
Output  
MUX  
STo0  
STo1  
STo2  
STo3  
STo4  
STo5  
STo6  
STo7  
STi0  
STi1  
STi2  
STi3  
STi4  
STi5  
STi6  
STi7  
Parallel  
to  
Serial  
to  
Data  
Memory  
Serial  
Parallel  
Converter  
Control Register  
Control Interface  
Converter  
Connection  
Memory  
DS CS R/W A5/ DTA D7/  
A0 D0  
CSTo  
** for 48-pin SSOP only  
Figure 1 - Functional Block Diagram  
1
1234567...20

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MT89L85APR1 MICROSEMI

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MT89L86AN MICROSEMI

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