XRT72L13 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT72L13' PDF : 370 Pages View PDF
XRT72L13
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
REV. P1.0.6
áç
PRELIMINARY
PIN DESCRIPTIONS
PIN #
107
NAME
TxDS1Clk_21
108
TxDS1Data_20/
TxHDLCData_0
109
TxDS1Clk_20
110
TxDS1Data_19
111
TxDS1Clk_19
112
TxDS1Data_18
113
TxDS1Clk_18
TYPE
I
I
I
I
I
I
DESCRIPTION
Transmit DS1/E1 Clock Input - Channel 21:
This input pin accepts either a DS1 (1.544MHz) or an E1 (2.048MHz)
clock signal from the Terminal Equipment. The falling edge of this sig-
nal is used to sample the data at the "TxDS1Data_21" input pin.
Transmit DS1/E1 Data Input - Channel 20/Transmit HDLC Control-
ler Block Input - Bit 0:
The funtion of this output pin depends upon whether the XRT72L13 is
operating in the "Multiplexer/De-Multiplexer" Mode or in the "High
Speed HDLC Controller" Mode.
Transmit DS1/E1 Data Input - Channel 20 (Multiplexer/De-Multi-
plexer Mode)
This input pin accepts either a DS1 or E1 signal from the Terminal
Equipment. This input pin is sampled upon the "falling edge" of the
TxDS1Clk_20 signal.
Transmit HDLC Controller Block Input - Bit 0: (High Speed HDLC
Controller Mode)
This input pin, along with TxHDLC_Data[1:7] function as the "Transmit
HDLC Controller Byte input interface. Data that resides on this bus,
during the rising edge of "TxHDLCClk" is latched into the "Transmit
HDLC Controller Block" and will be encapsulated into a HDLC frame
and transmitted to the remote terminal equipment.
Transmit DS1 Clock Input - Channel 20:
This input pin accepts either a DS1 (1.544MHz) or an E1 (2.048MHz)
clock signal from the Terminal Equipment. The falling edge of this sig-
nal is used to sample the data at the "TxDS1Data_20" input pin.
Transmit DS1 Data Input - Channel 19:
This input pin accepts a DS1 signal from the Terminal Equipment.
This input pin is sampled upon the "falling edge" of the TxDS1Clk_19
signal.
NOTES:
1. This input pin is inactive if the corresponding M12 MUX is
multiplexing 3 E1's into an ITU-T G.747 data stream.
2. This input pin accepts DS2 data if M12 MUX # 5 is bypassed.
Transmit DS1 Clock Input - Channel 19:
This input pin accepts a DS1 (1.544MHz) clock signal from the Termi-
nal Equipment. The falling edge of this signal is used to sample the
data at the "TxDS1Data_19" input pin.
NOTES:
1. This input pin is inactive if the corresponding M12 MUX is
multiplexing 3 E1's into an ITU-T G.747 data stream.
2. This input pin accepts a DS2 rate clock signal (6.312MHz) if
M12 MUX # 5 is bypassed.
Transmit DS1/E1 Data Input - Channel 18:
This input pin accepts either a DS1 or E1 signal from the Terminal
Equipment. This input pin is sampled upon the "falling edge" of the
TxDS1Clk_18 signal.
Transmit DS1/E1 Clock Input - Channel 18:
This input pin accepts either a DS1 (1.544MHz) or an E1 (2.048MHz)
clock signal from the Terminal Equipment. The falling edge of this sig-
nal is used to sample the data at the "TxDS1Data_18" input pin.
20
Share Link: 
