XRT83VSH28IB datasheet(20/74 Pages) EXAR

20 / 74 page

XRT83VSH28

PRELIMINARY

8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

REV. P1.0.0

TVDD

F16

E17

N15

P15

****

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 0.1

µF capacitor.

RVDD

G16

D16

N17

U18

****

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 0.1

µF capacitor.

RGND

G17

D17

M17

R17

****

Receiver Analog Ground

It’s recommended that all ground pins of this device be tied together.

AVDD-Bias

K17

****

Analog Power Supply (1.8V ±5%)

AVDD should be isolated from the digital power supplies. 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 at least one 0.1

µF capacitor.

AGND

J17

****

Analog Ground

It’s recommended that all ground pins of this device be tied together.

DVDD3v3

A18

K15

****

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 available,

a ferrite bead can be used. Every two DVDD power supply pins should be

bypassed to ground through at least one 0.1

µF capacitor.

DVDD1v8

U10

K18

D10

****

Digital Power Supply (1.8V ±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 available,

a ferrite bead can be used. Every two DVDD power supply pins should be

bypassed to ground through at least one 0.1

µF capacitor.

NOTE: For proper operation, the power-up sequence is: bring up 1.8V power

befor the 3.3V.

SIGNAL NAME

BGA

LEAD #

TYPE

DESCRIPTION

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