XR-T5684IJ 查看數據表（PDF） - Exar Corporation

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XR-T5684IJ

Low Power T1 Analog Interface

Exar Corporation 

XR-T5684

PIN DESCRIPTION (CONT’D)

Pin #

12

Symbol

LOS

13

TTIP

14

TGND

15

TVDD

16

TRING

17

MTIP

18

MRING

19

RTIP

20

RRING

21

RVDD

22

RGND

23

LEN0

24

LEN1

25

LEN2

26

TEST

27

N/C

28

TAOS

Type

O

O

O

O

I

I

I

I

I

I

I

I

I

Description

Loss of Signal. This pin goes high either when the input signal at RTIP and RRING drops to

below 0.4V peak or after 175 zeros are detected. The 175 zeros detection is active only when

LCLK is applied.

Transmit Positive Data. Transmit AMI signal is driven to the line via a step-up transformer

from this pin.

Transmitter Supply Ground. This pin can be connected to RGND externally.

5 V ±5% Transmitter Supply.

Transmit Negative Data. Transmit AMI signal is driven to the line via a step-up transformer

from this pin.

Driver Performance Monitor Input. This pin is normally connected to TTIP for monitoring

the driver’s activity. It is pulled high internally.

Driver Performance Monitor Input. This pin is normally connected to TRING for monitoring

the driver’s activity. It is pulled high internally.

Receive Tip Input. The AMI receive signal is input to this pin via a centre-tapped transformer.

Receive Ring Input. The AMI receive signal is input to this pin via a centre-tapped transformer.

5 V ±5% Receive Supply. This pin can be connected to TVDD externally.

Receive Supply Ground. This pin is also connected to the substrate of the device.

Pulse Shaper Select Pin. Least significant bit.

Pulse Shaper Select Pin. Second significant bit.

Pulse Shaper Select Pin. Most significant bit.

Factory Test Pin. This pin must be grounded for normal operation.

No Connection Pin. This pin can be grounded or left floating.

Transmit All Ones Select. Setting TAOS high causes continuous AMI ones to be transmitted

to the line at the frequency set by TCLK.

Rev. 1.01

5

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