DS26524DK Maxim Integrated Products, DS26524DK Datasheet - Page 217
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DS26524DK
Manufacturer Part Number
DS26524DK
Description
KIT DESIGN FOR DS26524
Manufacturer
Maxim Integrated Products
Datasheet
1.DS26524G.pdf
(273 pages)
Specifications of DS26524DK
Main Purpose
Telecom, Framer and Line Interface Units (LIUs)
Utilized Ic / Part
DS26524
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 6: Transmit Impedance Off (TIMPTOFF).
Bits 5 and 4: Transmit Load Impedance 1 and 0 (TIMPL[1:0]). These bits are used to select the transmit load
impedance. These must be set to match the cable impedance. Even if the internal load impedance is turned off (via
TIMPTOFF); the external cable impedance must be specified for optimum operation. For J1 applications, use
110Ω. See
Bits 2 to 0: Line Build-Out Select 2 to 0 (L[2:0])
voltage level and load impedance associated with it once the T1/J1 or E1 selection is made by settings in the
LTRCR
Table 9-15. Transmit Load Impedance Selection
Table 9-16. Transmit Pulse Shape Selection
L2
L2
0
0
0
0
0
0
1
1
1
1
TIMPL1
0
0
1
1
L1
L1
0
0
0
0
1
1
0
0
1
1
0 = Enable transmit terminating impedance.
1 = Disable transmit terminating impedance.
register. See
L0
L0
0
1
0
1
0
1
0
1
0
1
Table
TIMPL0
—
7
0
MODE
MODE
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
9-15.
E1
E1
0
1
0
1
Table
TIMPTOFF
LTITSR
LIU Transmit Impedance and Pulse Shape Selection Register
1001h + (20h x n): where n = 0 to 3, for Ports 1 to 4
DSX-1/0dB CSU, 0ft–133ft ABAM 100Ω
DSX-1, 133ft–266ft ABAM 100Ω
DSX-1, 266ft–399ft ABAM 100Ω
DSX-1, 399ft–533ft ABAM 100Ω
DSX-1, 533ft–655ft ABAM 100Ω
-7.5dB CSU
-15dB CSU
-22.5dB CSU
IMPEDANCE
9-16.
6
0
120Ω
IMPEDANCE SELECTION
75Ω
CABLE LENGTH
TIMPL1
100Ω
110Ω
120Ω
75Ω
5
0
VOLTAGE
NOMINAL
2.37V
3.0V
.
Used to select the transmit waveshape. The waveshape has a
217 of 273
TIMPL0
4
0
CABLE LOSS
—
3
0
ALLOWED
0.6dB
1.2dB
1.8dB
2.4dB
3.0dB
MAX
—
—
—
L2
2
0
L1
1
0
L0
0
0
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