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參數(shù)資料
| 型號： | MH89790B |
| 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)： | 3/32頁 |
| 文件大?。?/td> | 488K |
| 代理商： | MH89790B |
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4-189
Preliminary Information
MH89790B
16
ADI
Alternate Digit Inversion (Input)
: If this input is high, the CEPT timeslots which are
specified on CSTi0 as voice channels are ADI coded and decoded. When this bit is low
it disables ADI coding for all channels. This feature allows either ADI or non-ADI codecs
to be used on DSTi and DSTo. Internally pulled with a 4.7k
resistor to +V
DD
.
Data ST-BUS Input:
This pin accepts a 2048 kbit/s serial stream which contains the 30
PCM or data channels to be transmitted on the CEPT trunk.
17
DSTi
18
C2i
2048 kbit/s System Clock (Input)
: The master clock for the ST-BUS section of the
chip. All data on the ST-BUS is clocked in on the falling edge of the C2i and output on the
rising edge. The falling edge of C2i is also used to clock out data on the CEPT PCM 30
transmit link.
19
E2o
2048 kHz Extracted Clock (Output)
: Internally connected to pin 3.
20
F0i
Frame Pulse Input
: The ST-BUS frame synchronization signal which defines the
beginning of the 32 channel frame.
21
V
SS
PADi
Ground.
D.C. Power Return.
22
PAD Input
:
Input to the symmetrical resistive 75 ohm T-type line matching circuit. In a
typical application connect this input to the output of the line driving transformer.
23
TxG
Transmit Ground
:
Common point of the T-type PAD circuit. Connect to GND in a typical
application.
24
PADo
PAD Output:
Output from the T-type PAD circuit. Output impedance of the PAD is pure
resistive 75
.
Output A (Open Collector Output)
:
This is the output of the CEPT transmitter. It is
suitable for use with an external pulse transformer to generate the transmit bipolar line
signal.
25
OUTA
26
TxMF
Transmit Multiframe Boundary (Input)
: This input can be used to set the channel
associated and CRC transmitted multiframe boundary (clear the frame counters). If a
transmit multiframe signal is not being generated externally to the device, the MH89790B
will internally generate its own multiframe when this pin is tied high.
27
RxMF
Received Multiframe Boundary (Output)
: An output pulse delimiting the received
multiframe boundary. (This multiframe is not related to the received CRC multiframe.)
28
NC
No Connection.
29
OUTB
Output B (Open Collector Output)
:
Output of the CEPT transmitter. It is suitable for
use with an external pulse transformer to generate the transmit bipolar line signal.
30
NC
No Connection.
31
DSTo
Data ST-BUS Output
: A 2048 kbit/s serial output stream which contains the 30 PCM or
data channels received from the CEPT line.
32
NC
No Connection.
33
V
SS
NC
Ground.
D.C. Power Return.
34 - 37
No Connection.
38
LOS
Loss of Signal (Output):
This pin goes High when 128 contiguous ZEROs are received
on the RxT and RxR inputs. When LOS is High, RxA and RxB are forced High. LOS is
reset when 64 ONEs are received in a two E1-frame period.
39 - 40
NC
No Connection.
Pin Description (Continued)
Pin #
Name
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MH89790BN | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MH89790BS | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MH89791 | CEPT PCM 30 Transmit Equalizer Advance Information |
| MH89792-1 | E1 Transceiver Preliminary Information |
| MH89792 | E1 Transceiver Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MH89790BN | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information |
| MH89790BS | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information |
| MH89791 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CEPT PCM 30 Transmit Equalizer Advance Information |
| MH89792 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
| MH89792-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
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