xrt75r03 Exar Corporation, xrt75r03 Datasheet - Page 22

• Manufacturer Part Number: xrt75r03
• Description: Xrt75r03 -multi-channel Line Interface Unit Liu Family Desynchronizer And Jitter Attenuator With R3 Technologytm
• Manufacturer: Exar Corporation

GENERAL CONTROL PINS
XRT75R03
REV. 1.0.8
P
102
72
98
81
74
96
83
73
97
82
IN
#
STS-1/DS3_0
STS-1/DS3_1
STS-1/DS3_2
S
IGNAL
RLB_0
RLB_1
RLB_2
LLB_0
LLB_1
LLB_2
TEST
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
N
AME
T
****
YPE
I
I
I
STS-1/DS3 Select Input - Channel 0
STS-1/DS3 Select Input - Channel 1
STS-1/DS3 Select Input - Channel 2
This input pin, along with the corresponding E3_n input pin is used the to config-
ure a given channel within the XRT75R03 into either the DS3, E3 or STS-1
Modes.
"High" - Configures the corresponding channel to operate in the STS-1 Mode
provided that the corresponding E3_n input pin is pulled "Low".
"Low" - Configures the corresponding channel to operate in DS3 Mode provided
that the corresponding E3_n input pin is pulled "Low".
N
Remote Loop-back - RLB Input - Channel 0:
Remote Loop-back - RLB Input - Channel 1:
Remote Loop-back - RLB Input - Channel 2:
This input pin along with LLB_n is used to configure different Loop-Back modes.
N
Loop-Back Select - LLB Input - Channel 0
Loop-Back Select - LLB Input - Channel 1
Loop-Back Select - LLB Input - Channel 2
Please see description above for RLB_n
Factory Test Mode Input Pin
This pin must be connected to GND for normal operation.
N
OTES
OTE
OTE
1. This input pin is ignored and should be tied to GND if the XRT75R03
2. This input pin is internally pulled low.
:
: This input pin is internally pulled "Low".
:
XRT75R03 is operating in the HOST Mode.
This input pin is ignored and should be connected to GND if the
has been configured to operate in the Host Mode or if the
corresponding E3_n input pin is pulled "High".
RLB_n
0
0
1
1
19
LLB_n
0
1
0
1
D
ESCRIPTION
Digital Local Loop-Back Mode
Normal (No Loop-Back) Mode
Remote Loop-Back Mode
Analog Loop-Back Mode
Loopback Mode
xr
xr
xr
xr