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參數(shù)資料
| 型號(hào)： | MT8977 |
| 廠商： | Mitel Networks Corporation |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 中文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 文件頁(yè)數(shù)： | 1/30頁(yè) |
| 文件大?。?/td> | 200K |
| 代理商： | MT8977 |
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4-59
Features
D3/D4 or ESF framing and SLC-96 compatible
Two frame elastic buffer with jitter tolerance
improved to 156 UI
Insertion and detection of A, B, C, D bits,
signalling freeze, optional debounce
Selectable B8ZS, jammed bit (ZCS) or no zero
code suppression
Yellow alarm and blue alarm signal capabilities
Bipolar violation count, F
T
error count, CRC
error count
Selectable robbed bit signalling
Frame and superframe sync. signals, Tx and Rx
AMI encoding and decoding
Per channel, overall, and remote loop around
Digital phase detector between T1 line and ST-
BUS
One uncommitted scan point and drive point
Pin compatible with MT8976 and MT8979
ST-BUS compatible
Applications
DS1/ESF digital trunk interfaces
Computer to PBX interfaces (DMI and CPI)
High speed computer to computer data links
Description
The MT8977 is a variant of the MT8976 framer,
which has been enhanced to meet ACCUNET
T1.5
wander tolerance (138 UI).
The MT8977 meets ESF and D3/D4 formats, and is
compatible with SLC-96 systems.
Figure 1 - Functional Block Diagram
ACCUNET
T1.5 is a registered trademark of AT & T
TxSF
C2i
F0i
RxSF
DSTo
DSTi
CSTi0
CSTi1
CSTo
XCtl
XSt
ST-BUS
Timing
Circuitry
Data
Interface
Serial
Control
Interface
Control Logic
2 Frame
Elastic Buffer
with Slip
Control
2048-1544
Converter
ABCD
Signalling RAM
DS1
Link
Interface
Phase
Detector
DS1
Counter
Remote &
Digital
Loopbacks
C1.5i
RxFDLClk
RxFDL
RxA
RxB
TxA
TxB
TxFDLClk
TxFDL
RxD
E1.5i
E8Ko
V
SS
V
DD
Ordering Information
MT8977AE
28 Pin Plastic DIP
MT8977AP
44 Pin PLCC
-40
°
C to 85
°
C
ISSUE 4
October 1997
MT8977
T1/ESF Framer Circuit (ACCUNET
T1.5)
Preliminary Information
ISO-CMOS ST-BUS
FAMILY
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT8977 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MT8977AC | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MT8977AE | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MT8977AP | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MT8979 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8977AC | 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 |
| MT8977AE | 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 |
| MT8977AP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Mitel Networks Corporation 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: 制造商:ZARLINK 功能描述: |
| MT8977APR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: 制造商:ZARLINK 功能描述: |
| MT8979 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface |
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