XRT83L34 datasheet(9/99 Pages) EXAR

9 / 99 page

XRT83L34

QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR REV. 1.0.1

RPOS_0/

RDATA_0

RPOS_1/

RDATA_1

RPOS_2/

RDATA_2

RPOS_3/

RDATA_3

Receiver Positive-Polarity Data Output/Receive Data Output - Channel

The exact function of this output pin depends upon whether the XRT83L34

device has been configured to operate in the Single-Rail or Dual-Rail Mode

as described below.

Dual-Rail Mode Operation - Receive Positive-Polarity Data Output Pin -

RPOS_n:

The Receive Section of Channel n will output the positive-polarity portion of

the Recovered incoming DS1/E1 data (from the remote terminal equipment)

via this output pin. Each Channel (within the XRT83L34 device) will update

the data (that is output via this output pin) upon the "user-selected" edge of

the RCLK_n output clock signal.

The "Negative-Portion" of this recovered incoming DS1/E1 data (from the

remote terminal equipment) will be output via the corresponding RNEG_n

output pin.

Single-Rail Mode Operation - Receive Data Output Pin - RDATA_n

If Channel n has been configured to operate in the Single-Rail Mode, then

the entire incoming DS1/E1 data (that has been recovered by the Receive

Section of Channel n) will be output via this output pin upon the "user-

selected" edge of the RCLK_n output clock signal.

RTIP_0

RTIP_1

RTIP_2

RTIP_3

Receiver Differential Tip Positive Input for Channel _n:

This input pin, along with the corresponding RRING_n input pin functions as

the "Receive DS1/E1 Line Signal" for Channel n, within the XRT83L34

device.

The user is expected to connect this signal and the corresponding RRING_n

input signal to a 1:1 transformer.

Whenever the RTIP_n/RRING_n input pins are receiving a positive-polarity

pulse within the incoming DS1 or E1 line signal, then this input pin will be

pulsed to a "higher-voltage" than that of the corresponding RRING_n input

pin.

Conversely, whenever the RTIP_n/RRING_n input pins are receiving a nega-

tive-polarity pulse within the incoming DS1 or E1 line signal, then this input

pin will be pulsed to a "lower-voltage" than that of the corresponding

RRING_n input pin.

RRING_0

RRING_1

RRING_2

RRING_3

Receiver Differential Ring Negative Input for Channel _n:

This input pin, along with the corresponding RTIP_n input pin functions as

the "Receive DS1/E1 Line Signal" for Channel n, within the XRT83L34

device.

The user is expected to connect this signal and the corresponding RTIP_n

input signal to a 1:1 transformer.

Whenever the RTIP_n/RRING_n input pins are receiving a positive-polarity

pulse within the incoming DS1 or E1 line signal, then this input pin will be

pulsed to a "lower-voltage" than that of the corresponding RTIP_n input pin.

Conversely, whenever the RTIP_n/RRING_n input pins are receiving a nega-

tive-polarity pulse within the incoming DS1 or E1 line signal, then this input

pin will be pulsed to a "higher-voltage" than that of the corresponding RTIP_n

input pin.

SIGNAL NAME

PIN #TYPE

DESCRIPTION

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