XR72L52 Datasheet, PDF (23/480 Pages) Exar Corporation – TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
XRT72L52
REV. 1.0.1
PIN DESCRIPTION
PIN #
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PIN NAME
TxInClk[1]
RxPOS[1]
RxLineClk[1]
GND
TxLineClk[1]
TxPOS[1]
TxNEG[1]
RxOutClk[1]/
RxHDLCDat7[1]
VDD
NC
DMO[1]
ExtLOS[1]
RLOL[1]
GND
RLOOP[1]
LLOOP[1]
Req[1]
TAOS[1]
RxRed[1]
RxAIS[1]
RxOOF[1]
RxLOS[1]
EncoDis[1]
TYPE
I See Description for Pin 22
I See Description for Pin 23
I See Description for Pin 24
**** Ground
O See Description for Pin 18
O See Description for Pin 17
O See Description for Pin 16
O See Description for Pin 15
**** Power Supply 3.3V + 5%
DESCRIPTION
I See Description for Pin 150
I See Description for Pin 151
I Receive Loss of Lock Indicator - from the XRT73L0x DS3/E3 Line Interface
Unit IC:
This input pin is intended to be connected to the RLOL output pin of the
XRT73L0x Line Interface Unit IC. The user can monitor the state of this pin by
reading the state of Bit 1 (RLOL) within the Line Interface Scan Register
(Address = 0x81).
If this input pin is "Low", then the clock recovery phase-locked-loop circuitry
within the XRT73L0x is properly locked onto the incoming DS3 E3 data-stream
and is properly recovering clock and data from this DS3/E3 data-stream. If this
input pin is "High", then the phase-locked-loop circuitry within the XRT73L0x has
lost lock with the incoming DS3 or E3 data-stream and is not properly recovering
clock and data.
For more information on the operation of the XRT73L0x DS3/E3 Line Interface
Unit IC, please consult the XRT73L0x DS3/E3 Line Interface Unit data sheet.
NOTE: If the XRT73L0x DS3/E3 Line Interface Unit IC is not used, this input pin
can be used for other purposes.
**** Ground
O See Description for Pin 155
O See Description for Pin 156
O See Description for Pin 157
O See Description for Pin 158
O See Description for Pin 159
O See Description for Pin 160
O See Description for Pin 2
O See Description for Pin 3
O See Description for Pin 4
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