NSK70721PE.C2 Intel, NSK70721PE.C2 Datasheet - Page 22

• Manufacturer Part Number: NSK70721PE.C2
• Manufacturer: Intel

Specifications of NSK70721PE.C2

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Supplier Unconfirmed

SK70725/SK70721 — Enhanced Multi-Rate DSL Data Pump Chip Set
3.1.4
3.1.5
22
Mode Select
3
0
0
0
0
1
1
1
1
(MODE_Sn)
Table 5.
Pin
2
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
Line Interface
The Data Pump line interface consists of three differential pairs. The transmit outputs TTIP and
TRING, receive inputs RTIP and RRING, and the balance inputs BTIP and BRING, all connect
through a common transformer to a single twisted-pair line
outputs require resistors in series with the transformer. A passive pre-filter is required for the
receive inputs. The balance inputs feed the transmit signals back to the Data Pump providing
passive echo cancellation. Protection circuitry could be used if required. Refer to application note
AN79 for further details of line protection circuits.
Data Interface
This section describes the EMDP data interface which provides three distinct operating modes:
Transparent, Independent and Framed. The operating modes can be configured using MODE_S3,
MODE_S2, and MODE_S1 pins of the EDSP.
their key features.
Figure 6
transmitter, encoded as a 2B1Q signal, sent over the line, and clocked out of the receiver of the far-
end transceiver. Data is transmitted simultaneously in both directions.
EMDP Data Mode Selection
Enabled while
Scrambler
Active
N/A
N
N
Y
N
Y
Y
Y
illustrates generic data transport using the MDSL system. Data is clocked into a
Sign bit
First
N/A
N/A
N/A
N/A
N/A
N
Y
Y
Receive Timing
Transmit and
Independent
N/A
N
N
N
N
N
Y
Y
Table 5
Framed
N/A
N
N
N
N
N
Y
Y
lists various operating modes along with
(Figure 26
7006/7010
4702/4706
Length
Frame
(bits)
N/A
N/A
N/A
N/A
N/A
N/A
and
Figure
Framed ANSI
Framed ETSI
Independent
Independent
Transparent
Transparent
Transparent
27). The transmit
Operation
Operation
Operation
Reserved
Name
Mode
Datasheet
#
0
1
2
3
4
5
6
7