XRT59L921IB Exar Corporation, XRT59L921IB Datasheet - Page 10

• Manufacturer Part Number: XRT59L921IB
• Description: 21 CHANNEL E1 LIU
• Manufacturer: Exar Corporation

Specifications of XRT59L921IB

• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

PIN DESCRIPTIONS
XRT59L921
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
P
W18
W15
U16
C17
H17
U13
Y18
Y16
E16
A16
A17
A19
T13
E10
E12
T10
T12
L16
W6
C6
U5
H4
H5
A3
A5
B5
E5
A7
Y7
Y5
Y3
P4
L5
L4
IN
#
TEST PINS
TxPOS_10
TxPOS_11
TxPOS_12
TxPOS_13
TxPOS_14
TxPOS_15
TxPOS_16
TxPOS_17
TxPOS_18
TxPOS_19
TxPOS_20
FACTORY
TxPOS_0
TxPOS_1
TxPOS_2
TxPOS_3
TxPOS_4
TxPOS_5
TxPOS_6
TxPOS_7
TxPOS_8
TxPOS_9
S
AGND
AGND
AGND
AGND
AGND
TRST
YMBOL
TDO
TMS
TCK
TDI
T
YPE
O
I
I
I
I
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.
JTAG Test Clock input, Boundary Scan Clock input:
N
JTAG Test Data input, Boundary Scan Test Data Input:
N
JTAG Test Data output:
Boundary Scan Test Data Output:
JTAG Test Mode Select, Boundary Scan Test Mode Select input pin:
JTAG Test Mode Reset, Boundary Scan Mode Reset Input pin:
N
FACTORY TEST PINS:
The customer must tie these pins to ground for normal operation.
Analog Ground - Receivers
OTE
OTE
OTE
: This input pin should be pulled "Low" for normal operation. internally pulled
: This input pin should be pulled "Low" for normal operation. internally pulled
: This input pin should be pulled "Low" for normal operation. internally pulled
"High" with a 50k
"High" with a 50k
"High" with a 50k
8
Ω
Ω
Ω
resistor.
resistor.
resistor.
D
ESCRIPTION
REV. 1.2.1