DP83850CVF National Semiconductor, DP83850CVF Datasheet - Page 30

• Manufacturer Part Number: DP83850CVF
• Description: IC CONTROLLER INTERFACE 132-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83850CVF

• Controller Type: Ethernet Repeater Interface Controller
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 295mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83850CVF

6.0 A.C. and D.C. Specifications
6.2.3 Inter Repeater Receive and Intra-Repeater Collision Timing
Note 3: “RXxxx” refers to any of the receive signals, i.e. RXC, RXD[3:0], RX_DV. or RX_ER. “IRxxx” refers to any of the
Inter Repeater signals, i.e. IRD_CK, IRD[3:0], /IRD_V, or /IRD_ER.
Note 4: This parameter refers to the delta in delay between any of the Inter Repeater signals.
Note 5: “CRSx” refers to any of CRS[11:0] signals being asserted.
Note 6: This timing refers to the assertion of /IR_COL_OUT during an internal collision, that is when 2 or more CRSx
signals are asserted in the same DP83850C.
Note 7: This timing refers only to the condition where only one CRSx is present. IRD_ODIR will be deasserted immedi-
ately if a collision occurs.
Note 8: The assertion of IRD_ODIR is also dependent upon an equality comparison on IR_VECT[4:0]. These timings
reflect a direct feedback path at the IR_VECT I/O pins. If external buffers are used, then these timings are increased by
the external delay of the buffers.
T12a Receive to Inter Repeater Bus skew
T17a /ACTIVEO to IRD_ODIR delay
T12 Receive to Inter Repeater Bus delay
T13 CRSx assertion (de-assertion) to -ACTIVEO assertion (de-assertion)
T14 CRSx assertion (de-assertion) to /IR_ACTIVE assertion (de-assertion)
T15 CRSx assertion (de-assertion) to /IR_COL_OUT assertion (de-assertion)
T16 CRSx assertion (de-assertion) to IR_VECT[4:0] assertion (d2-assertion)
T17 CRSx assertion to IRD_ODIR assertion with no collision
T18 CRSx de-assertion to IRD_ODIR de-assertion
8
4
3
(Continued)
Description
5, 7
30
5,8
5
5
5
5,6
Min Max Units
6.5
4
www.national.com
10
20
20
18
20
36
2
6
LCK
ns
ns
ns
ns
ns
ns
ns
ns