參數(shù)資料
型號(hào)： XRT59L921
廠商： Exar Corporation
英文描述： TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
中文描述： 二十一條路E1線路接口單元
文件頁(yè)數(shù)： 10/32頁(yè)
文件大?。?/td> 377K
代理商： XRT59L921
XRT59L921
8
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.2.1
A3
A5
B5
C6
E5
A7
U5
W6
Y7
Y5
Y3
Y18
W18
Y16
W15
U16
E16
C17
A16
A17
A19
TxPOS_0
TxPOS_1
TxPOS_2
TxPOS_3
TxPOS_4
TxPOS_5
TxPOS_6
TxPOS_7
TxPOS_8
TxPOS_9
TxPOS_10
TxPOS_11
TxPOS_12
TxPOS_13
TxPOS_14
TxPOS_15
TxPOS_16
TxPOS_17
TxPOS_18
TxPOS_19
TxPOS_20
I
Transmitter - Positive Data Input – Channel_n:
The exact signal that should be applied to this input pin depends upon whether the
user intends to operate the Transmit Section (of Channel_n) in the Clock or Clock-
less Mode.
Clock Mode:
The Terminal Equipment should apply bit-wide NRZ pulses on this input whenever
the Terminal Equipment needs to transmit a Positive-Polarity pulse onto the line via
TTIP_n and TRing_n output pins. The XRT59L921 will sample this input pin upon the
falling edge of the TClk_n signal.
Clockless Mode:
The Terminal Equipment should apply RZ pulses to this input pin, anytime the Termi-
nal Equipment needs to transmit a Positive-Polarity pulse onto the line via TTIP_n
and TRing_n output pins.
L5
TCK
I
JTAG Test Clock input, Boundary Scan Clock input:
N
OTE
:
This input pin should be pulled "Low" for normal operation. internally pulled
"High" with a 50k
resistor.
H4
TDI
I
JTAG Test Data input, Boundary Scan Test Data Input:
N
OTE
:
This input pin should be pulled "Low" for normal operation. internally pulled
"High" with a 50k
resistor.
L4
TDO
O
JTAG Test Data output:
Boundary Scan Test Data Output:
H5
TMS
I
JTAG Test Mode Select, Boundary Scan Test Mode Select input pin:
P4
TRST
I
JTAG Test Mode Reset, Boundary Scan Mode Reset Input pin:
N
OTE
:
This input pin should be pulled "Low" for normal operation. internally pulled
"High" with a 50k
resistor.
H17
T13
U13
FACTORY
TEST PINS
FACTORY TEST PINS:
The customer must tie these pins to ground for normal operation.
E10
E12
T10
T12
L16
AGND
AGND
AGND
AGND
AGND
-
Analog Ground -
Receivers
PIN DESCRIPTIONS
P
IN
#
S
YMBOL
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
XRT59L921IB TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
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