KS8721BL A4 Micrel Inc, KS8721BL A4 Datasheet - Page 27
![10/100 Base-TX/FX Physical Layer Transceiver, Single 3.3V Supply, 48-LQFP](/photos/31/30/313065/57648lqfp_sml.jpg)
KS8721BL A4
Manufacturer Part Number
KS8721BL A4
Description
10/100 Base-TX/FX Physical Layer Transceiver, Single 3.3V Supply, 48-LQFP
Manufacturer
Micrel Inc
Datasheet
1.KS8721BL_A4.pdf
(34 pages)
Specifications of KS8721BL A4
Lead Free Status / Rohs Status
Not Compliant
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Symbol
February 2005
KS8721BL/SL
t
t
t
t
t
t
t
t
P
WL
WH
SU
HD
RLAT
CRS1
CRS2
Parameter
RXC Period
RXC Pulse Width
RXC Pulse Width
RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC
RXD [3:0], RXER, RXDV Hold from Rising Edge of RXC
CRS to RXD Latency, 4B or 5B Aligned
“Start of Stream” to CSR Asserted
“End of Stream” to CSR De-Asserted
RX+/RX-
CRS
RXDV
RXD[3:0]
RXER
RXC
Table 5. 100BASE-T MII Receive Timing Parameters
Start of
Stream
Figure 6. 100BASE-T MII Receive Timing
t
CRS1
t
RLAT
t
SU
27
t
HD
End of
Stream
t
WL
t
t
t
P
CRS2
WH
Min
106
154
20
20
Typ
40
20
20
6
M9999-022105
Max
138
186
Micrel
Units
BT
ns
ns
ns
ns
ns
ns
ns
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