XRT75R12 Datasheet, PDF (15/89 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR

PRELIMINARY
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R12
REV. P1.0.2
POWER SUPPLY PINS
PIN NAME
PIN NUMBERS
DESCRIPTION
RVDD0
RVDD1
RVDD2
RVDD3
RVDD4
RVDD5
RVDD6
RVDD7
RVDD8
RVDD9
RVDD10
RVDD11
D22
AC22
D18
AC18
E15
AB15
E12
AB12
A9
AF9
D5
AC5
Receive Analog Power Supply (3.3V ±5%)
RVDD should not be shared with other power supplies. 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.
TVDD0
TVDD1
TVDD2
TVDD3
TVDD4
TVDD5
TVDD6
TVDD7
TVDD8
TVDD9
TVDD10
TVDD11
B23
AE23
B19
AE19
B15
AE15
B10
AE10
A6
AF6
B4
AE4
Transmit Analog Power Supply (3.3V ±5%)
TVDD can be shared with DVDD. However, it is recommended that TVDD be iso-
lated 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.
AVDD
DVDD
M25, T25, AB21, AB18, Analog Power Supply (3.3V ±5%)
AF13, AF12, AB9, AB6, AVDD should be isolated from the digital power supplies. For best results, use an
R4, K1, E6, E9, A12, A13, internal power plane for isolation. If an internal power plane is not available, a ferrite
E18, E21,
bead can be used. Each power supply pin should be bypassed to ground through at
least one 0.1µF capacitor.
D26, F25, H25, P25, W26, Digital Power Supply (3.3V ±5%)
V24, Y22, AF21, AF20, DVDD should be isolated from the analog power supplies. For best results, use an
AF17, AF16, AD14, AD12, internal power plane for isolation. If an internal power plane is not available, a ferrite
AF11, AF8, AF7, AF24, ^{bead can be used. Every two DVDD power supply pins should be bypassed to}
AD6, AF3, Y5, V3, W1, P5, ^{ground through at least one 0.1µF capacitor.}
P2, H2, F2, D1, C6, A7,
A3, A8, A11, C12, C14,
A16, A17, A20, A21, A24
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