XRT84L38 View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT84L38

OCTAL T1/E1/J1 FRAMER

Exar Corporation 

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REV. 1.0.1

TRANSMIT SERIAL DATA INPUT

(Framer Channel Number indicated by _n)

XRT84L38

OCTAL T1/E1/J1 FRAMER

SIGNAL NAME

PIN #

TYPE

DESCRIPTION

TxSync_0

TxSync_1

TxSync_2

TxSync_3

TxSync_4

TxSync_5

TxSync_6

TxSync_7

D6

A12

A21

E25

AA23

AC19

AE10

AF6

I or O

Single Frame Sync Pulse Input/Output—Transmit Framer_n:

This pin is configured to be an input if the TxSerClk_n input pin is configured

to be the timing reference for the Transmit Portion of Framer_n. This pin is

configured as an output if the RxLineClk_n input pin or the OSCClk input pins

are configured to be the timing reference for the Transmit portion of Framer_n.

DS1 Mode:

When pin is configured to be an Input

If this pin is configured to be an input, then the user must pulse this pin "High"

for one period of TxSerClk_n, when the Transmit payload data Input Interface

(of Framer_n) is processing the first bit (F-bit) of an outbound DS1 frame.

NOTE: It is imperative that the TxSync_n input signal be synchronized with the

TxSerClk_n input signal.

When pin is configured to be an Output

If this pin is configured to be an output, then it will pulse "High", for one period

of TxSerClk_n, when the Transmit payload data Input Interface (of Framer_n)

is processing the last payload bit within an outbound DS1 frame.

E1 Mode:

When pin is configured to be an Input

If this pin is configured to be an input, then the user must pulse this pin "High"

for one period of TxSerClk_n, when the Transmit payload data Input Interface

(of Framer_n) is processing the International Bit (Si) of an outbound E1 frame.

NOTE: It is imperative that the TxSync_n input signal be synchronized with the

TxSerClk_n input signal.

When pin is configured to be an Output

If this pin is configured to be an output, then it will pulse "High", for one period

of TxSerClk_n, when the Transmit payload data Input Interface (of Framer_n)

is processing the last bit within a given outbound E1 frame.

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