XRT83SL314ES Exar, XRT83SL314ES Datasheet - Page 20

• Manufacturer Part Number: XRT83SL314ES
• Description: LIN Transceivers 14 CHT1/E1 LIUSH
• Manufacturer: Exar

Specifications of XRT83SL314ES

• Product Category: LIN Transceivers
• Rohs: yes

XRT83SL314
REV. 1.0.1
Along with the internal termination, a high precision external fixed resistor can be used to optimize the return
loss. This external resistor can be used for all modes of operation ensuring one bill of materials. There are
three resistor values that can be used by setting the RxRES[1:0] bits in the appropriate channel register.
Selecting the value for the external fixed resistor is shown in Table 3.
By default, RxRES[1:0] is set to "None" for no external fixed resistor. If an external fixed resistor is used, the
XRT83SL314 uses the parallel combination of the external fixed resistor and the internal termination as the
input impedance. See Figure 5 for a typical connection diagram using the external fixed resistor.
N
F
2.1.2
OTE
IGURE
: Without the external resistor, the XRT83SL314 meets all return loss specifications. This mode was created to add
flexibility for optimizing return loss by using a high precision external resistor.
5. T
CASE 2: Internal Termination With One External Fixed Resistor for All Modes
YPICAL
C
ONNECTION
T
ABLE
Internal Impedance
XRT83SL314 LIU
3: S
D
ELECTING THE
R
IAGRAM
X
0h (00)
1h (01)
2h (10)
3h (11)
RES[1:0]
Receiver
Input
U
SING
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
R
R
RING
TIP
V
ALUE OF THE
O
NE
R=240Ω, 210Ω, or 150Ω
E
17
XTERNAL
R
E
XTERNAL
E
XTERNAL
1:1
F
IXED
None
240Ω
210Ω
150Ω
F
Line Interface T1/E1/J1
IXED
R
F
ESISTOR
IXED
R
ESISTOR
R
ESISTOR
xr