KS8721BL Micrel Inc, KS8721BL Datasheet - Page 25
![Special Function IC](/photos/6/81/68171/576-48-lqfp_sml.jpg)
KS8721BL
Manufacturer Part Number
KS8721BL
Description
Special Function IC
Manufacturer
Micrel Inc
Type
Transceiverr
Specifications of KS8721BL
Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Number Of Drivers/receivers
1/1
Protocol
MII, RMII
Voltage - Supply
2.375 V ~ 2.625 V
Mounting Type
Surface Mount
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
576-1007 - BOARD EVAL EXPERIMENT KS8721BL
Lead Free Status / RoHS Status
Not Compliant, Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
KS8721BL
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Timing Diagrams
Symbol
Note:
1. BT = bit time.
May 2004
KS8721BL/SL
t
t
t
t
t
t
t
t
t
SU1
SU2
HD1
HD2
CRS1
CRS2
LAT
SQE
SQEP
1BT = 1ns @ 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 3. 10BASE-T MII Transmit Timing Parameters
Figure 4. 10BASE-T MII Transmit Timing
25
Min
10
10
0
0
Typ
2.5
1.0
4
8
4
M9999-051704
Max
Micrel
Units
BT
BT
BT
ns
ns
ns
ns
s
s
(1)