參數(shù)資料
型號(hào)： MT8976
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
文件頁數(shù)： 17/26頁
文件大?。?/td> 337K
代理商： MT8976
ISO-CMOS
MT8976
4-45
compatible equipment (see ANSI T1.102 and AT & T
Technical Advisory #34). On the receive side the
bipolar line signal is converted into a unipolar
format by the line receiver circuit. The resulting
split phase signals are input at the RxA and RxB pins
on the MT8976. The signals are combined together
to produce a composite return to zero signal, which
is clocked into the device at RxD. An uncommitted
nand gate in the MT8940/41 can be used for this
purpose.
The MT8976 can be interfaced to a high speed
parallel bus or to a microprocessor using the
MT8920B Parallel Access Circuit (STPA). Figure 11
shows the MT8976 interfaced to a parallel bus
structure using two STPA‘s operating in modes 1 and
2.
The first STPA operating in mode 2 (MMS=0,
MS1=1, 24/32=0), routes data and/or voice
information between the parallel telecom bus and the
T1 or CEPT link via DSTi and DSTo. The second
STPA, operating in mode 1 (MMS = 1 ) provides
access from the signalling and link control bus to the
MT8976 status and control channels. All signalling
and link functions may be controlled easily through
the STPA transmit RAM’s Tx0, Tx1, while status
information is read at receive RAM Rx0. In addition,
interrupts can be set up to notify the system in case
of slips, loss of sync, alarms, violations, etc.
Mitel also manufactures a thick film hybrid device,
the MH89760/760B, which incorporates the line
driver, receiver and clock extractor circuitry. A
second SIP hybrid, the MH89761, provides the
necessary equalization circuitry to condition the
signal for transmission up to 655 feet over 22 AWG
twisted pair.
Note: the configurations shown in Figures 10 and 11
using the MT8940/41 may not meet specific jitter
performance requirements. A more sophisticated
PLL or line interface unit with transmit jitter
attenuator may be required for applications designed
to meet specific standards.
Figure 11 - Using the MT8976 in a Parallel Bus Environment
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HIGH
SPEED
PARALLEL
TELECOM
BUS
MT8920B
(Mode 2)
D
0
-D
7
A
0
-A
5
CS
R/W
OE
MMS MS1 24/32
STo0
STi0
STo1
C4i
F0i
MT8976
D
0
-D
7
A
0
-A
5
CS
DS
R/W
DTACK
IRQ
lACK
MMS
+5V
+5V
E8Ko
RxD
RxB
RxA
TxB
TxA
E1.5i
C1.5i
C2i
F0i
CSTi1
CSTo
CSTi0
DSTo
DSTi
Clock
Extractor
Tx
Line
Driver
Rx
Line
Receiver
DIP
SWITCH
EQU
MT8940/41
MT8940/
MT8941
CVb
F0i
C2o
F0b
C4b
C8Kb
12.355/12.352
MHz Osc.
MHz Osc.
16.388/16.384
1.544
MHz
STo0
STi0
STo1
C4i
F0i
MT8920B
(Mode 1)
SIGNALLING
and
LINK
CONTROL
BUS
MH89761
相關(guān)PDF資料
PDF描述
MT8976AC Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MT8976AE Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MT8976AP Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MT8977 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MT8977 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
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
MT8976AE 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
MT8976AE1 制造商:Zarlink Semiconductor Inc 功能描述:
MT8976AP 制造商:MITEL 功能描述:
MT8976AP1 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:
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