XRT91L80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT91L80' PDF : 45 Pages View PDF
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REV. P1.1.0
PRELIMINARY
XRT91L80
2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
POWER AND GROUND
NAME
TYPE
PIN
DESCRIPTION
AVDD1.8_TX
PWR
J1, J4, L6, L7, L8, M3, N9,
M2
Analog 1.8V Core Transmitter Power Supply
AVDD1.8_TX should be isolated from the digital power supplies.
For best results, use a ferrite bead along with an internal power
plane separation. The AVDD1.8_TX power supply pins should
have bypass capacitors to the nearest ground.
DGND
GND
A5, A12, B3, B8, B12, F11,
F12, G11, G12, G13, G14,
H11, H12, J11, J12, K12,
L3, L11, L12, P12
Digital Ground for 3.3V I/O and 1.8V Core Digital Power
Supplies
It is recommended that all ground pins of this device be tied
together.
AGND_RX
GND
A1, B1, B2, C2, C3, D2,
D7, E1, E2, E4, F2, F4, G2,
G4, H1, H2, H3, H4
Receiver Analog Ground for 3.3V I/O and 1.8V Core
Analog Power Supplies
It is recommended that all ground pins of this device be tied
together.
AGND_TX
GND
J2, J3, K2, K3, K4, L2, L4,
L5, M1, M4, M5, N5, N7,
P7
Transmitter Analog Ground for 3.3V I/O and 1.8V Core
Analog Power Supplies
It is recommended that all ground pins of this device be tied
together.
TGND
GND
E5, E6, E7, E8, E9, E10,
F5, F6, F7, F8, F9, F10,
G5, G6, G7, G8, G9, G10,
H5, H6, H7, H8, H9, H10,
J5, J6, J7, J8, J9, J10, K5,
K6, K7, K8, K9, K10
Thermal Ground
It is recommended that all ground pins of this device be tied
together.
NO CONNECTS
NAME
NC
LEVEL
TYPE
NC
PIN
DESCRIPTION
A4 No Connect
B4 This pin can be left floating or tied to ground.
11
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