DP83848VYB National Semiconductor, DP83848VYB Datasheet - Page 29

• Manufacturer Part Number: DP83848VYB
• Description: TRANSCEIVER, ENET PHY, 10/100, 48LQFP
• Manufacturer: National Semiconductor

Specifications of DP83848VYB

• Data Rate: 100Mbps
• No. Of Ports: 1
• Ethernet Type: IEEE 802.3u
• Supply Current: 92mA
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +105°C
• Digital Ic Case Style: LQFP
• No.: RoHS Compliant
• Interface Type: MII Serial, RMII
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Not Compliant

5.4 POWER FEEDBACK CIRCUIT
To ensure correct operation for the DP83848VYB, parallel
caps with values of 10 µF and 0.1 µF should be placed close
to pin 23 (PFBOUT) of the device.
Pin 18(PFBIN1), pin 37 (PFBIN2), pin 23 (PFBIN3) and pin
54 (PFBIN4) must be connected to pin 31 (PFBOUT), each
pin requires a small capacitor (.1 µF). See Figure 12 below
for proper connections.
1. This limit is provided as a guideline for component selection and not guaranteed by production testing. Refer to AN-1548,
“PHYTER 100 Base-TX Reference Clock Jitter Tolerance,” for details on jitter performance.
1. This limit is provided as a guideline for component selection and not guaranteed by production testing. Refer to AN-1548,
“PHYTER 100 Base-TX Reference Clock Jitter Tolerance,” for details on jitter performance.
Frequency Tolerance
Frequency Tolerance
Frequency Tolerance
Frequency Stability
Frequency Stability
Frequency Stability
Load Capacitance
Rise / Fall Time
Rise / Fall Time
Parameter
Frequency
Parameter
Frequency
Parameter
Symmetry
Frequency
Symmetry
Jitter
Jitter
Jitter
Jitter
40%
Min
40%
Min
Min
25
TABLE 7. 25 MHz Oscillator Specification
TABLE 8. 50 MHz Oscillator Specification
TABLE 9. 25 MHz Crystal Specification
FIGURE 11. Crystal Oscillator Circuit
Typ
Typ
Typ
25
50
25
800
800
60%
Max
±50
±50
Max
800
800
Max
60%
±50
±50
29
±50
±50
40
6
6
1
1
1
1
30011712
MHz
nsec
psec
psec
Units
Units
ppm
ppm
Units
MHz
MHz
nsec
psec
psec
ppm
ppm
ppm
ppm
pF
Operational Temperature
Operational Temperature
Operational Temperature
Operational Temperature
1 year aging
1 year aging
Condition
20% - 80%
Duty Cycle
Short term
Condition
20% - 80%
Long term
Duty Cycle
Condition
Short term
Long term
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