XRT83VSH38 データシートの表示（PDF） - Exar Corporation

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XRT83VSH38

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

Exar Corporation 

REV. 1.0.7

XRT83VSH38

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

SIGNAL NAME

TCLK0

TCLK1

TCLK2

TCLK3

TCLK4

TCLK5

TCLK6

TCLK7

TAOS0

TAOS1

TAOS2

TAOS3

TAOS4

TAOS5

TAOS6

TAOS7

TXON0

TXON1

TXON2

TXON3

TXON4

TXON5

TXON6

TXON7

BGA

LEAD #

B4

A3

A15

C14

T3

T5

V16

U15

D6

B6

A5

C6

T6

U6

V6

R6

A13

D12

C12

B12

V13

U13

R12

R13

TYPE

DESCRIPTION

I 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 sends an all zero signal to the line. TPOS/TNEG data can be sampled on

either edge of TCLK selected by TCLKE.

NOTE: 1. TCLKE is a global setting that applies to all 8 channels.

NOTE: 2. Internally pulled "Low" with a 50kΩ resistor.

I Transmit All Ones for Channel

Hardware Mode Only

Setting this pin “High” enables the transmission of an all ones pattern to the line

from TTIP/TRING. If this pin is pulled “Low”, the transmitters operate in normal

throughput mode.

NOTE: Internally pulled “Low” with a 50kΩ resistor for all channels. This feature is

available in Host mode by programming the appropriate channel register.

I 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 software control while in

Host mode. However, if TxONCNTL is set "High" in software, or if in Hardware

mode, the activity of the transmitter outputs is controlled by the TxON pins.

NOTE: TxON is ideal for redundancy applications. See the Redundancy

Applications Section of this datasheet for more details. Internally pulled

"Low" with a 50KΩ resistor.

8

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