DP83849CVS/NOPB National Semiconductor, DP83849CVS/NOPB Datasheet - Page 35

• Manufacturer Part Number: DP83849CVS/NOPB
• Description: IC TXRX ETHERNET PHY DUAL 80TQFP
• Manufacturer: National Semiconductor
• Type: Transceiverr

Specifications of DP83849CVS/NOPB

• Number Of Drivers/receivers: 2/2
• Protocol: Ethernet
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Data Rate: 100Mbps
• Supply Voltage Range: 3V To 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 80
• Operating Temperature Range: 0°C To +70°C
• Msl: MSL 3 - 168 Hours
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Data Rate Max: 10Mbps
• For Use With: DP83849CVS-EVK - BOARD EVALUATION DP83849CVS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *DP83849CVS; *DP83849CVS/NOPB; DP83849CVS

5.0 Design Guidelines
5.1 TPI Network Circuit
Figure 12 shows the recommended circuit for a 10/100
Mb/s twisted pair interface.
PLACE RESISTORS AND
CAPACITORS CLOSE TO
TPTDM
TPRDM
TPTDP
TDRDP
THE DEVICE.
49.9
49.9
49.9
49.9
Figure 12. 10/100 Mb/s Twisted Pair Interface
Vdd
Vdd
0.1 F
0.1 F
35
Below is a partial list of recommended transformers. It is
important that the user realize that variations with PCB and
component characteristics requires that the application be
tested to ensure that the circuit meets the requirements of
the intended application.
All values are typical and are +/- 1%
Pulse H1102
Pulse H2019
Belfuse S558-5999-U7
Halo TG110-S050N2RL
Vdd
NOTE: CENTER TAP IS PULLED TO VDD
*PLACE CAPACITORS CLOSE TO THE
0.1µF*
0.1µF*
TRANSFORMER CENTER TAPS
COMMON MODE CHOKES
MAY BE REQUIRED.
1:1
1:1
T1
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RD-
RD+
TD-
TD+
RJ45