DP83849CVS/NOPB National Semiconductor, DP83849CVS/NOPB Datasheet - Page 43

• 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

5.4 Power Feedback Circuit
To ensure correct operation for the DP83849I, parallel caps
with values of 10 F and 0.1 F should be placed close to
pin 31 (PFBOUT) of the device. Pin 7 (PFBIN1), pin 28
(PFBIN2), pin 34 (PFBIN3) and pin 54 (PFBIN4) must be
1
This limit is provided as a guideline for component selection and to guaranteed by production testing.
Refer to AN-1548, “PHYTER 100 Base-TX Reference Clock Jitter Tolerance,“ for details on jitter performance.
Load Capacitance
Rise / Fall Time
Parameter
Frequency
Frequency
Frequency
Symmetry
Tolerance
Parameter
Frequency
Frequency
Frequency
Tolerance
Stability
Stability
Jitter
Jitter
Pin 34 (PFBIN3)
Pin 54 (PFBIN4)
Pin 28 (PFBIN2)
Pin 7 (PFBIN1)
Pin 31 (PFBOUT)
40%
Min
Min
25
Figure 14. Power Feeback Connection
Table 15. 50 MHz Oscillator Specification
Table 16. 25 MHz Crystal Specification
.1 F
.1 F
Typ
50
Typ
25
.1 F
43
connected to pin 31 (PFBOUT), each pin requires a small
capacitor (.1 F). See Figure 14 below for proper connec-
tions.
.1 F
800
800
60%
Max
+50
+50
6
1
1
Max
+50
+50
40
10 F
+
-
Units
MHz
nsec
psec
psec
ppm
ppm
Units
MHz
ppm
ppm
pF
.1 F
Operational Temperature
Operational Temperature
20% - 80%
Duty Cycle
Condition
Short term
Long term
Temperature
1 year aging
Operational
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Condition