XRT75R03IVTR-F Exar Corporation, XRT75R03IVTR-F Datasheet - Page 7

• Manufacturer Part Number: XRT75R03IVTR-F
• Description: IC LIU E3/DS3/STS-1 3CH 128LQFP
• Manufacturer: Exar Corporation

Specifications of XRT75R03IVTR-F

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

xr
xr
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
PIN DESCRIPTIONS (
xr
xr
SYSTEM-SIDE TRANSMIT INPUT AND TRANSMIT CONTROL PINS
P
125
38
35
26
IN
1
4
#
S
IGNAL
TxON_0
TxON_1
TxON_2
TxClk_0
TxClk_1
TxClk_2
N
AME
BY FUNCTION
T
YPE
I
I
Transmitter ON Input - Channel 0:
Transmitter ON Input - Channel 1:
Transmitter ON Input - Channel 2:
These input pins are used to either enable or disable the Transmit Output
Driver corresponding to Channel_n.
"Low" - Disables the Transmit Output Driver of the corresponding Channel.
In this setting, the corresponding TTIP_n and TRING_n output pins will be
tri-stated.
"High" - Enables the Transmit Output Driver of the corresponding Channel.
In this setting, the corresponding TTIP_n and TRING_n output pins will be
enabled.
N
Transmit Clock Input - Channel 0:
Transmit Clock Input f - Channel 1:
Transmit Clock Input - Channel 2:
These input pins have two functions:
•
•
N
)
OTES
OTE
They function as the timing source for the Transmit Section of the
corresponding channel within the XRT75R03.
They also are used by the Transmit Section of the LIU IC to sample the
corresponding TPDATA_n and TNDATA_n input pin.
1. Even when the XRT75R03 is configured in HOST mode, these
2. When Transmitters are turned off either in Host or Hardware
3. These pins are internally pulled "High"
: The user is expected to supply a 44.736MHz ± 20ppm clock signal
:
(for DS3 applications), 34.368MHz ± 20 ppm clock signal (for E3
applications) or a 51.84MHz ± 4.6ppm clock signal (for STS-1,
Stratum 3E or better applications).
pins will be active. To enable software control of the Transmit
Output Driver outputs, pull these pins "High".
mode, the TTIP and TRing outputs are Tri-stated.
4
D
ESCRIPTION
XRT75R03
REV. 1.0.8