參數(shù)資料
型號(hào)： MT8981DPR1
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 路由/交換
英文描述： ISO-CMOS ST-BUS
中文描述： TELECOM, DIGITAL TIME SWITCH, PQCC44
封裝： LEAD FREE, PLASTIC, MS-018AC, LCC-44
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 481K
代理商： MT8981DPR1
MT8981D
Data Sheet
8
Zarlink Semiconductor Inc.
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 2 is 1, the associated ST-BUS output channel is in Message Mode; i.e., the byte in the
corresponding Connection Memory Low location is transmitted on the stream at that channel. Otherwise, one of the
bytes received on the serial inputs is transmitted and the contents of the Connection Memory Low define the ST-
BUS input stream and channel where the byte is to be found (see Fig. 6).
If the ODE pin is low, then all serial outputs are high-impedance. If it is high and bit 6 in the Control Register is 1,
then all outputs are active. If the ODE pin is high and bit 6 in the Control Register is 0, then the bit 0 in the
Connection Memory High location enables the output drivers for the corresponding individual ST-BUS output
stream and channel. Bit 0=1 enables the driver and bit 0=0 disables it (see Fig. 5).
Applications
Use in a Simple Digital Switching System
Fig. 7 and 8 show how MT8981s can be used with MT8964s to form a simple digital switching system. Fig. 7 shows
the interface between the MT8981s and the filter/codecs. Fig. 8 shows the position of these components in an
example architecture.
The MT8964 filter/codec in Fig. 7 receives and transmits digitized voice signals on the ST-BUS input D
R
, and ST-
BUS output D
X
, respectively. These signals are routed to the ST-BUS inputs and outputs on the top MT8981, which
is used as a digital speech switch.
Figure 7 - Example of Typical Interface between 8981s and 8964s for Simple Digital Switching
System
The MT8964 is controlled by the ST-BUS input D
C
originating from the bottom MT8981, which generates the
appropriate signals from an output channel in Message Mode. This architecture optimizes the messaging capability
of the line circuit by building signalling logic, e.g., for on-off hook detection, which communicates on an ST-BUS
output. This signalling ST-BUS output is monitored by a microprocessor (not shown) through an ST-BUS input on
the bottom MT8981.
8981 used
as
speech
switch
MT8981
STo0
STi0
STo0
STi0
MT8981
8981 used
in message
mode for
control and
signalling
D
X
D
R
D
C
MT8964
Filter/Codec
Signalling
Logic
Line Driver
and
2- to 4-
Wire
Converter
Line Interface Circuit with 8964 Filter/Codec
相關(guān)PDF資料
PDF描述
MT8981D-1 ISO-CMOS ST-BUS⑩ FAMILY Digital Switch
MT8981DE ISO-CMOS ST-BUS⑩ FAMILY Digital Switch
MT8981DP ISO-CMOS ST-BUS⑩ FAMILY Digital Switch
MT8981D Digital Switch
MT8981DE Digital Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT8982 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Small Digital Switch (MiniDX)
MT8982-1 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Small Digital Switch (MiniDX)
MT8982AC 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Small Digital Switch (MiniDX)
MT8982AE 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Small Digital Switch (MiniDX)
MT8982AN 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Small Digital Switch (MiniDX)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*