BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 50

• Manufacturer Part Number: BCM5208KPF
• Manufacturer: Broadcom

Specifications of BCM5208KPF

• Number Of Receivers: 4
• Data Rate: 10/100Mbps
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3.14V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

n BCM5208
Table 32 provides the parameters for 10BASE-T receive timing. 10BASE-T collision timing parameters are shown in
Table 33.
Page 42
PARAMETER
RXC Cycle Time
RXC High/Low Time
CRS Assert after First Rising Edge of Preamble
with Positive Start-of-Idle
CRS Assert after First Falling Edge of Preamble
with Negative Start-of-Idle
RXC Valid after CRS Assert
RXDV Assert after Receive Analog Data
RXDV Deassert after Receive Analog EOP ends
CRS Deassert after Receive Analog EOP ends
Note: Positive Start of Idle contains four “1” data samples, which implies correct polarity, and Negative Start-of-Idle contains
four “0” data samples, which implies reversed polarity. Refer to IEEE 802.3, Clause 14, Figure 14-10.
PARAMETER
COL Assert after First Rising Edge of Preamble wit h
positive Start-of-Idle
COL Assert after First Falling Edge of Preamble with
negative Start-of-Idle
COL Deassert after TXEN Deassert (while receiving) TXEN_NOT_COL
COL Assert after TXEN Assert (while receiving)
COL Deassert after Receive Analog ends (while
transmitting)
RD±
CRS
RXDV
RXD
RXER
RXC
I
I
I
0
Figure 10: False Carrier Sense Timing (100BASE-TX)
Table 33: 10BASE-T Collision Timing
Table 32: 10BASE-T Receive Timing
B r o a d c o m C o r p o r a t i o n
I
I
SYMBOL
RXC_CYCLE
RX_CRS_BT
RX_CRS_BT
RX_RXDV
RX_NOT_RXDV
RX_NOT_CRS
SYMBOL
RX_COL
RX_COL
RX_NOT_COL
RXC_VALID
TXEN_COL
I
I
I
I
E
I
MIN
MIN
I
370.0
150.5
100
100
I
–
–
–
–
–
–
–
–
–
I
I
TYP
TYP
1900
400
200
150
150
510
510
250
250
440
400
I
50
–
Document 5208-DS03-R¥¥¥¥¥
I
I
MAX
MAX
0
430.0
240.5
2000
2300
250
250
560
560
300
300
490
450
100
I
November 3, 1999
I
I
UNIT
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns