XRT83VSH316 Просмотр технического описания (PDF) - Exar Corporation

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XRT83VSH316

IC LIU SH T1/E1/J1 16CH 316STBGA

Exar Corporation 

REV. 1.0.2

XRT83VSH316

16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

TRANSMITTER SECTION

NAME

PIN

TxON

Y19

TYPE

I

DMO

T6

O

TCLK15

W13

I

TCLK14

Y15

TCLK13

U13

TCLK12

U14

TCLK11

D14

TCLK10

D13

TCLK9

A15

TCLK8

B13

TCLK7

B8

TCLK6

A6

TCLK5

D8

TCLK4

D7

TCLK3

U7

TCLK2

U8

TCLK1

Y6

TCLK0

W8

DESCRIPTION

Transmit On/Off Input

Upon power up, the transmitters are powered off. Turning the transmitters On

or Off is selected through the microprocessor interface by programming the

appropriate channel register if this pin is pulled "High". If the TxON pin is

pulled "Low", all 16 transmitters are powered off.

NOTES:

1. TxON is ideal for redundancy applications. See the Redundancy

Applications Section of this datasheet for more details.

2. Internally pulled "Low" with a 50K resistor.

Digital Monitor Output (Global Pin for All 16-Channels)

When no transmit output pulse is detected for more than 128 TCLK cycles on

one of the 16-channels, the DMO pin will go "High" for a minimum of one TCLK

cycle. DMO will remain "High" until the transmitter sends a valid pulse.

NOTE: This pin is for redundancy applications to initiate an automatic switch to

the backup card. For individual channel DMO, see the register map.

Transmit Clock Input

TCLK is the input facility clock used to sample the incoming TPOS/TNEG data.

If TCLK is absent, pulled "Low", or pulled "High", the transmitter outputs at

TTIP/TRING can be selected to send an all ones or an all zero signal by pro-

gramming TCLKCNL. In addition, software control (TCLKE) allows TPOS/

TNEG data to be sampled on either edge of TCLK.

NOTES:

1. TCLKE is a global setting that applies to all 16 channels.

2. Internally pulled "Low" with a 50k  resistor.

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