XRT72L53 Datasheet, PDF (32/467 Pages) Exar Corporation – THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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PRELIMINARY
XRT72L53
THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.7
PIN DESCRIPTION CONNECTED PINS
PIN #
W11
PIN NAME
TxOHFrame[2]/
TxHDLCClk[2]
W12
TxNib3[2]/
TxHDLCDat3[2]
W13
TxNib1[2]/
TxHDLCDat1[2]
W15
TxNIBClk[2]/
SndFCS[2]
W16
TxNibFrame[2]/
ValFCS[2]
W19
W20
Y4
RxSer[2]/
RxIdle[2]
RxOHInd[2]
EncoDis[2]
Y7
RxOH[2]/
RxHDLCDat6[2]
Y10 TxOHEnable[2]/
TxHDLCDat7[2]
Y14
TxNib0[2]/
TxHDLCDat0[2]
Y15
TxOHInd[2]/
TxHDLCDat6[2]
Y18
RxNib2[2]/
RxHDLCDat2[2]
Y19
RxNib0[2]/
RxHDLCDat0[2]
TYPE
O
I
I
O
I
O
O
O
O
O
O
I
I
O
I
O
O
DESCRIPTION
Transmit Overhead Data Framing Pulse/Transmit HDLC Output
Clock - Channel 0:
See Description for Pin C13
Transmit Nibble-Parallel Payload Data Input - Bit 3/Transmit HDLC
Data Input - Bit 3; Channel 2:
See Description for Pin D19
Transmit Nibble-Parallel Payload Data Input - Bit 1/Transmit HDLC
Data Input - Bit 1; Channel 2:
See Description for Pin E17
Transmit Nibble Clock Output Signal/Transmit HDLC - SEND
FRAME CHECK SEQUENCE Input - Channel 2:
See Description for Pin F18
Transmit Frame Boundary Indicator - Nibble-Parallel Interface/
Transmit HDLC Controller - VALID FRAME CHECK SEQUENCE out-
put - Channel 2:
See Description for Pin G17
Receive Serial Output/Receive Flag Sequence Output - Channel 2:
See Description for Pin F19
Receive Overhead Bit Indicator - Channel 2:
See Description for Pin G18
Encoder (B3ZS/HDB3) Disable Output pin - Channel 2 (intended to
be connected to the DS3/E3 LIU IC):
See Description for Pin B2
Receive Overhead Data Output/Receive HDLC Controller Data Out-
put - Bit 6; Channel 2:
See Description for Pin C12
Transmit Overhead Input Enable/Transmit HDLC Controller Data
Output - Bit 7; Channel 0:
See Description for Pin B14
Transmit Nibble-Parallel Payload Data Input - Bit 0/Transmit HDLC
Data Input - Bit 0; Channel 2:
See Description for Pin D18
Transmit Overhead Data Indicator Output/Transmit HDLC Data
Input - Bit 6; Channel 2:
See Description for Pin E19
Receive Nibble Output - Bit 2/Receive HDLC Data - Bit 2; Channel
2:
See Description for Pin H18
Receive Nibble Output - Bit 0/Receive HDLC Data - Bit 0; Channel
2:
See Description for Pin G19
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