DS26528G Maxim Integrated Products, DS26528G Datasheet - Page 219
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DS26528G
Manufacturer Part Number
DS26528G
Description
Network Controller & Processor ICs Octal E1-T1-J1 Singl e-Chip Transceiver (
Manufacturer
Maxim Integrated Products
Datasheet
1.DS26528G.pdf
(276 pages)
Specifications of DS26528G
Product
Framer
Number Of Transceivers
8
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
875 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
TE-CSBGA
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Manufacturer:
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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 7, for Ports 1 to 8
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
219 of 276
TIMPL0
4
0
CABLE LOSS
—
3
0
ALLOWED
0.6dB
1.2dB
1.8dB
2.4dB
3.0dB
MAX
—
—
—
DS26528 Octal T1/E1/J1 Transceiver
L2
2
0
L1
1
0
L0
0
0
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