XRT75R03IVTR-F Exar Corporation, XRT75R03IVTR-F Datasheet - Page 84
XRT75R03IVTR-F
Manufacturer Part Number
XRT75R03IVTR-F
Description
IC LIU E3/DS3/STS-1 3CH 128LQFP
Manufacturer
Exar Corporation
Datasheet
1.XRT75R03IVTR.pdf
(92 pages)
Specifications of XRT75R03IVTR-F
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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XRT75R03
REV. 1.0.8
B
IT
N
UMBER
4
3
2
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
RLB_n
LLB_n
N
E3_n
AME
T
R/W
R/W
R/W
YPE
D
V
EFAULT
ALUE
0
0
0
81
Loop-Back Select - RLB Bit - Channel_n:
This READ/WRITE bit-field along with the corresponding
LLB_n bit-field is used to configure a given channel (within
the XRT75R03) into various loop-back modes.
The relationship between the settings for this input pin, the
corresponding LLB_n bit-field and the resulting Loop-back
Mode is presented below.
Loop-Back Select - LLB Bit-field - Channel_n:
Please see the description (above) for RLB_n.
E3 Mode Select - Channel_n:
This READ/WRITE bit-field, along with Bit 1 (STS-1/
DS3_n) within this particular register, is used to configure a
given channel (of the XRT75R03) into either the DS3, E3
or STS-1 Modes, as depicted below.
0 - Configures Channel_n to operate in either the DS3 or
STS-1 Modes, depending upon the state of Bit 1 (STS-1/
DS3_n) within this same register.
1- Configures Channel_n to operate in the E3 Mode.
LLB_n
0
0
1
1
RLB_n
0
1
0
1
D
ESCRIPTION
Analog Local Loop-back Mode
Norm al (No Loop-back) Mode
Digital Local Loop-back Mode
Rem ote Loop-back Mode
Loop-back M ode
xr
xr
xr
xr
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