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參數(shù)資料
| 型號(hào)： | MT8972B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Digital Network Interface Circuit(數(shù)字網(wǎng)絡(luò)接口電路（提供高速，全雙工數(shù)字傳送的多功能設(shè)備）) |
| 中文描述： | 數(shù)字網(wǎng)絡(luò)接口電路（數(shù)字網(wǎng)絡(luò)接口電路（提供高速，全雙工數(shù)字傳送的多功能設(shè)備）） |
| 文件頁(yè)數(shù)： | 1/3頁(yè) |
| 文件大?。?/td> | 21K |
| 代理商： | MT8972B |
9-113
SeeMT917172
Features
Full duplex transmission over a single twisted
pair
Selectable 80 or 160 kbit/s line rate
Adaptive echo cancellation
Up to 3km (8971B) and 4 km (8972B)
ISDN compatible (2B+D) data format
Transparent modem capability
Frame synchronization and clock extraction
MITEL ST-BUS compatible
Low power (typically 50 mW), single 5V supply
Applications
Digital subscriber lines
High speed data transmission over twisted
wires
Digital PABX line cards and telephone sets
80 or 160 kbit/s single chip modem
Figure 1 - Functional Block Diagram
DSTi/Di
CDSTi/
CDi
F0/CLD
C4/TCK
F0o/RCK
MS0
MS1
MS2
RegC
DSTo/Do
CDSTo/
CDo
Transmit
Interface
Prescrambler
Scrambler
Control
Register
Transmit/
Clock
Receive
Timing &
Control
Status
Transmit
Timing
Master Clock
Phase Locked
Sync Detect
Receive
DPLL
Receive
Interface
De
-
Prescrambler
Descrambler
Differentially
Encoded Biphase
Receiver
Differentially
Encoded Biphase
Transmitter
Transmit
Filter &
Line Driver
Receive
Filter
-1
+2
MUX
Address
Echo Canceller
Error
Signal
Echo Estimate
—
+
∑
V
Bias
V
DD
V
SS
V
Bias
V
Ref
L
OUT
L
OUT
DIS
Precan
L
IN
OSC2
OSC1
ISSUE 7
May 1995
Description
The MT8971B (DSIC) and MT8972B (DNIC) are
multi-function devices capable of providing high
speed,
full duplex digital transmission up to 160
kbit/s over a twisted wire pair. They use adaptive
echo-cancelling techniques and transfer data in
(2B+D) format compatible to the ISDN basic rate.
Several modes of operation allow an easy interface
to digital telecommunication networks including use
as a high speed limited distance modem with data
rates up to 160 kbit/s. Both devices function
identically but with the DSIC having a shorter
maximum loop reach specification. The generic
"DNIC" will be used to reference both devices unless
otherwise noted.
The MT8971B/72B is fabricated in Mitel’s ISO
2
-
CMOS process.
Ordering Information
MT8971BE
22 Pin Plastic DIP
MT8972BE
22 Pin Plastic DIP
MT8972BC
22 Pin Ceramic DIP
MT8971BP
28 Pin PLCC
MT8972BP
28 Pin PLCC
-40
°
C to
+
85
°
C
MT8971B/72B
Digital Subscriber Interface Circuit
Digital Network Interface Circuit
ISO
2
-CMOS ST-BUS
FAMILY
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8972BC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS ST-BUS⑩ FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit |
| MT8972BE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS ST-BUS⑩ FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit |
| MT8972BP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS ST-BUS⑩ FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit |
| MT8976 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1/ESF Framer Circuit |
| MT8976AC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1/ESF Framer Circuit |
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