XRT84L38 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT84L38' PDF : 453 Pages View PDF
XRT84L38
OCTAL T1/E1/J1 FRAMER
TRANSMIT ENCODER LIU INTERFACE
(Framer Channel Number indicated by _n)
REV. 1.0.1
SIGNAL NAME
PIN #
TYPE
DESCRIPTION
TxNEG_0
TxNEG_1
TxNEG_2
TxNEG_3
TxNEG_4
TxNEG_5
TxNEG_6
TxNEG_7
TxMX_0
TxMX_1
TxMX_2
TxMX_3
TxMX_4
TxMX_5
TxMX_6
TxMX_7
F3
O Transmit Negative Polarity Pulse—Framer_n:
H2
This output pin is intended to be connected to the TxNEG or TNDATA input of
K2
the LIU (Line Interface Unit) associated with Framer_n.
M3
Framer_n will assert this signal when it wishes for the Line Interface Unit (LIU)
V1
associated with Framer_n, to transmit a negative polarity pulse on the line.
Y2
AC1
AE1
Transmit Max
F3
O Output pulses “High” for one bit time and is coincident with the sampling of the
H2
least serial bit of a multiframe.
K2
M3
V1
Y2
AC1
AE1
TxLineCLK_0
F2
O Transmit Line Clock Output—Framer_n:
TxLineCLK_1
G2
This output pin is intended to be connected to the TxClk input of the LIU (Line
TxLineCLK_2
J2
Interface Unit) associated with Framer_n.
TxLineCLK_3
N4
The LIU uses this pin to sample and latch the signals at its TPDATA and
TxLineCLK_4
V4
TNDATA input pins.
TxLineCLK_5
Y3
TxLineCLK_6
AC3
TxLineCLK_7
AC4
TIMING
(Framer Channel Number indicated by _n)
SIGNAL NAME
OSCClk
8kHz_Ref
PIN #
T1
U2
TYPE
DESCRIPTION
I Oscillator Clock:
This is a programmable operation clock input. This clock input can be one of six
frequencies:
E1 Mode: 16.384, 32.768 or 65.536 MHz
T1 Mode: 12.352, 24.704 or 49.408 MHz
I 8 kHz External Reference Clock Input:
LOP
R4
I Loss of Power / Input Pin for Messaging
24
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