KSZ8721CL Micrel Inc, KSZ8721CL Datasheet - Page 25

• Manufacturer Part Number: KSZ8721CL
• Description: IC TXRX PHY 10/100 3.3V 48-LQFP
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KSZ8721CL

• Number Of Drivers/receivers: 1/1
• Protocol: MII
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1673; KSZ8721CL

Timing Diagrams
Symbol
Note:
1. BT = bit time.
April 2005
KS8721CL
t
t
t
t
t
t
t
t
t
SU1
SU2
HD1
HD2
CRS1
CRS2
LAT
SQE
SQEP
1BT = 10ns @ 100BT.
Parameter
TXD [3:0] Set-Up to TXC High
TXEN Set-Up to TXC High
TXD [3:0] 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 TXP/TXM Output (TX Latency)
COL (SQE) Delay After TXEN De-Asserted
COL (SQE) Pulse Duration
Table 2. 10BASE-T MII Transmit Timing Parameters
Figure 5. 10BASE-T MII Transmit Timing
25
Min
10
10
0
0
Typ
2.5
1.0
4
8
4
M9999-041405
Max
Micrel, Inc.
Units
BT
BT
BT
ns
ns
ns
ns
µs
µs
(1)