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參數(shù)資料
| 型號： | MT8931B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數(shù)： | 17/29頁 |
| 文件大?。?/td> | 277K |
| 代理商： | MT8931B |
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Application Note
MSAN-141
A-217
Figure 15 - Controllerless Mode Functional Timing
Note:
F0b
HALF
MFR
M/S
MCH (NT)
MCH (TE)
M
S
M
S
Q-Bit
Q-Bit
Q-Bit
Q-Bit
In the controllerless mode, the parallel bus has direct
connection to the C-channel control and status
registers for either the TE or NT device. These
control/status pins allow the SNIC to be configured
using a discrete state machine or with manual
switches. All inputs/outputs to the control port will be
latched/refreshed by the SNIC on the falling edge of
the C4b clock midway through the system frame
pulse (F0b). Figure 15 shows the timing diagram
surrounding the structuring of the S- and Q-channels
in the NT controllerless mode.
In the controllerless mode, the SNIC can still be
controlled through the input C-channel on the system
(ST-BUS) interface. The structuring of the serial
control requires the P/SC pin to be tied to V
SS
, thus
rendering the remaining control pins as ”don’t cares”.
The option of disabling the ST-BUS channels is not
supported in the controllerless mode, therefore, all
input and output channels will be enabled.
5.0 TRANSMISSION PERFORMANCE
The transmission medium for the subscriber loop is a
four conductor configured as two twisted pairs.
Fig. 16 - I-V Characteristics of the Output Driver
To minimize the reflection of a propagating signal, a
100 ohm termination resistor is required in order to
match the characteristic impedance of the twisted
pair cable.
This terminating resistor is relevant to the
transmission line and is thus placed at both ends of
the transmit and receive pair (refer to Figures 7 to 9).
With the TE presenting a high impedance on both
Operating Point
20
1
0.75
0.95
1.25
15 mA
I
V
Figure 17 - NT Impedance Template (log-log scale)
2500
265
250
100
2
20
106
1000
Frequency (kHz)
Z
as output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT8930C-1 | SWITCH, ON-OFF, CHROM/BLK BTN; Switch function type:SPST Latching; Voltage, contact AC max:125V; Voltage, contact DC max:24V; Temp, op. max:85(degree C); Temp, op. min:-40(degree C); Diameter, panel cut-out:13.6mm; Length / Height, RoHS Compliant: Yes |
| MT8930C | Subscriber Network Interface Circuit(用戶網(wǎng)絡(luò)接口電路（提供點到點或點到多點數(shù)字傳送）) |
| MT8930 | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8930C | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8930CC | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8931BC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Network Interface Circuit |
| MT8931BE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Network Interface Circuit |
| MT8931BP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Network Interface Circuit |
| MT8931C | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Network Interface Circuit |
| MT8931C-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit |
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