BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 46

• 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
Figure 30 provides the parameters for 10BASE-T transmit timing.
Page 38
PARAMETER
TXC Cycle Time (10BASE-T)
TXC High/Low Time (10BASE-T)
TXC Rise/Fall Time
TXEN, TXD[3:0] valid after TXC rising*
TXEN, TXD[3:0] Hold after to TXC rising*
TD+/- after TXEN Assert
CRS Assert after TXEN Assert
CRS Deassert after TXEN Deassert
COL Assert after TXEN Assert (while RX)
COL Deassert after TXEN Deassert (while RX)
TXEN, TXD[3:0] Setup Time to CK10RPTR rising*
TXEN, TXD[3:0] Hold Time to CK10RPTR rising*
Idle on Twisted Pair after TXEN De-Assert
* The BCM5208 will function properly if the TXEN and TXD[3:0] inputs meet the setup and hold times to either the TXC
(Switch) output or the CK10RPTR (Repeater) input, respectively.
CLOCK
TXEN
TXD,
TXER
TD±
CRS
COL
Note 1
Note 1:
CLOCK will be:
TXC in DTE Mode
CK25 in 100BASE-TX Repeater Mode
DATA N
Figure 5: Transmit End of Packet Timing (100 Base-TX)
Table 30: 10BASE-T Transmit Timing - Parallel Mode
TXEN_COL_EOP
TXEN_CRS_EOP
X
B r o a d c o m C o r p o r a t i o n
SYMBOL
TXC_CYCLE
TXEN_VALID
TXEN_HOLD_DTE
TXEN_TDATA
TXEN_CRS
TXEN_CRS_EOP
TXEN_COL
TXEN_COL_EOP
TXEN_SETUP_RPTR
TXEN_HOLD_RPTR
TX_QUIET
LAST DATA
NIBBLE
T4 T3 T2 T1 T0 R4 R3 R2 R1 R0
MIN
197.5
395
75
12
-–
2
–
–
–
0
ESD
TYP
400
200
400
770
460
50
Document 5208-DS03-R¥¥¥¥¥
MAX
202.5
1200
405
450
100
500
25
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5
November 3, 1999
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UNIT
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