XRT83SL34IV datasheet(16/80 Pages) EXAR

16 / 80 page

XRT83SL34

QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

REV. P1.0.8

PRELIMINARY

ALARM FUNCTION//REDUNDANCY SUPPORT

MCLKT1

T1 Master Clock Input

This signal is an independent 1.544MHz clock for T1 systems with required

accuracy of better than ±50ppm and duty cycle of 40% to 60%. MCLKT1

input is used in the T1 mode.

NOTES:

All channels of the XRT83SL34 must be operated at the same clock

rate, either T1, E1 or J1.

See pin 32 description for further explanation for the usage of this

pin.

Internally pulled “Low” with a 50k

Ω resistor.

MCLKOUT

Synthesized Master Clock Output

This signal is the output of the Master Clock Synthesizer PLL which is at T1

or E1 rate based upon the mode of operation.

SIGNAL NAME

PIN #TYPE

DESCRIPTION

GAUGE

Twisted Pair Cable Wire Gauge Select - Hardware mode

Connect this pin "High" to select 26 Gauge wire. Connect this pin “Low” to

select 22 and 24 gauge wire for all channels.

NOTE: Internally pulled “Low” with a 50k

Ω resistor.

DMO_0

DMO_1

DMO_2

DMO_3

Driver Failure Monitor Channel _0

This pin transitions "High" if a short circuit condition is detected in the trans-

mit driver of Channel _0, or no transmit output pulse is detected for more

than 128 TCLK_0 cycles.

Driver Failure Monitor Channel _1

Driver Failure Monitor Channel _2

Driver Failure Monitor Channel _3

ATAOS

µPCLK

Automatic Transmit “All Ones” Pattern - Hardware Mode

A "High" level on this pin enables the automatic transmission of an "All Ones"

AMI pattern from the transmitter of any channel that the receiver of that

channel has detected an LOS condition. A "Low" level on this pin disables

this function.

NOTE: All channels share the same ATAOS input control function.

Microprocessor Clock Input - Host Mode

See “Microprocessor Clock Input - Host Mode” on page 9.

NOTE: This pin is internally pulled “Low” for asynchronous microprocessor

interface when no clock is present.

SIGNAL NAME

PIN #TYPE

DESCRIPTION

XRT83SL34IV Datasheet(PDF) 16 Page - Exar Corporation

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