KS8721BL A4 Micrel Inc, KS8721BL A4 Datasheet - Page 26

• Manufacturer Part Number: KS8721BL A4
• Description: 10/100 Base-TX/FX Physical Layer Transceiver, Single 3.3V Supply, 48-LQFP
• Manufacturer: Micrel Inc

Specifications of KS8721BL A4

• Lead Free Status / Rohs Status: Not Compliant

KS8721BL/SL
Symbol
Note:
1 1BT = 10ns at 100BASE-TX.
M9999-022105
t
t
t
t
t
t
t
t
SU1
SU2
HD1
HD2
HD3
CRS1
CRS2
LAT
Parameter
TXD [3:0] Set-Up to TXC High
TXEN Set-Up to TXC High
TXD [3:0] Hold After TXC High
TXER Hold After TXC High
TXEN Hold After TXC High
TXEN High to CRS Asserted Latency
TXEN Low to CRS De-Asserted Latency
TXEN High to TX+/TX– Output (TX Latency)
TXC
TXEN
TXD[3:0],
TXER
CRS
TX+/TX-
Table 4. 100BASE-T MII Transmit Timing Parameters
Figure 5. 100BASE-T MII Transmit Timing
t
t
SU2
SU1
Data
In
t
CRS1
t
LAT
t
t
HD2
HD1
Symbol
Out
26
t
CRS2
Min
10
10
0
0
0
Typ
4
4
9
February 2005
Max
Micrel
Units
BT
BT
BT
ns
ns
ns
ns
ns
(1)