XRT83L314 Datasheet, PDF (14/84 Pages) Exar Corporation – 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT

XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
POWER AND GROUND
NAME
PIN
TVDD13
TVDD12
TVDD11
TVDD10
TVDD9
TVDD8
TVDD7
TVDD6
TVDD5
TVDD4
TVDD3
TVDD2
TVDD1
TVDD0
AB13
V21
T21
N22
H22
E21
B13
B10
D2
J3
N2
T3
U4
AB10
RVDD13
RVDD12
RVDD11
RVDD10
RVDD9
RVDD8
RVDD7
RVDD6
RVDD5
RVDD4
RVDD3
RVDD2
RVDD1
RVDD0
AC15
AA23
T22
R23
F23
E22
A15
A8
E2
F1
R1
T2
Y2
AB9
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
J2
V2
D12
AA12
U21
K23
TYPE
PWR
DESCRIPTION
Transmit Analog Power Supply (3.3V ±5%)
TVDD can be shared with DVDD. However, it is recommended that TVDD be
isolated from the analog power supply RVDD. For best results, use an internal
power plane for isolation. If an internal power plane is not available, a ferrite
bead can be used. Each power supply pin should be bypassed to ground
through an external 0.1µF capacitor.
PWR
Receive Analog Power Supply (3.3V ±5%)
For long haul applications, RVDD should not be shared with other power sup-
plies. It is recommended that RVDD be isolated from the digital power supply
DVDD and the analog power supply TVDD. For best results, use an internal
power plane for isolation. If an internal power plane is not available, a ferrite
bead can be used. Each power supply pin should be bypassed to ground
through an external 0.1µF capacitor.
NOTE:
In long haul applications where the receive inputs can be severely
attenuated, it is critical to have a clean power supply design and clean
PCB layout with respect to RVDD. It is highly recommended that
RVDD be isolated from DVDD and TVDD.
PWR
Digital Power Supply (3.3V ±5%)
DVDD should be isolated from the analog power supplies. For best results,
use an internal power plane for isolation. If an internal power plane is not avail-
able, a ferrite bead can be used. Every two DVDD power supply pins should
be bypassed to ground through at least one 0.1µF capacitor.
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