參數(shù)資料
型號(hào)： XRT83VSH316IB
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述： DATACOM, PCM TRANSCEIVER, PBGA316
封裝： 21 X 21 MM, STBGA-316
文件頁數(shù)： 13/96頁
文件大?。?/td> 600K
代理商： XRT83VSH316IB
PRELIMINARY
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316
11
REV. P1.0.3
TRANSMITTER SECTION
N
AME
P
IN
T
YPE
D
ESCRIPTION
TxON
Y19
I
Transmit On/Off Input
Upon power up, the transmitters are powered off. Turning the transmitters On
or Off is selected through the microprocessor interface by programming the
appropriate channel register if this pin is pulled "High". If the TxON pin is
pulled "Low", all 16 transmitters are powered off.
N
OTES
:
1.
TxON is ideal for redundancy applications. See the Redundancy
Applications Section of this datasheet for more details.
2.
Internally pulled "Low" with a 50K
resistor.
DMO
T6
O
Digital Monitor Output (Global Pin for All 16-Channels)
When no transmit output pulse is detected for more than 128 TCLK cycles on
one of the 16-channels, the DMO pin will go "High" for a minimum of one TCLK
cycle. DMO will remain "High" until the transmitter sends a valid pulse.
N
OTE
:
This pin is for redundancy applications to initiate an automatic switch to
the backup card. For individual channel DMO, see the register map.
TCLK15
TCLK14
TCLK13
TCLK12
TCLK11
TCLK10
TCLK9
TCLK8
TCLK7
TCLK6
TCLK5
TCLK4
TCLK3
TCLK2
TCLK1
TCLK0
W13
Y15
U13
U14
D14
D13
A15
B13
B8
A6
D8
D7
U7
U8
Y6
W8
I
Transmit Clock Input
TCLK is the input facility clock used to sample the incoming TPOS/TNEG data.
If TCLK is absent, pulled "Low", or pulled "High", the transmitter outputs at
TTIP/TRING can be selected to send an all ones or an all zero signal by pro-
gramming TCLKCNL. In addition, software control (TCLKE) allows TPOS/
TNEG data to be sampled on either edge of TCLK.
N
OTES
:
1.
TCLKE is a global setting that applies to all 16 channels.
2.
Internally pulled "Low" with a 50k
resistor.
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