KS8721B Micrel Inc, KS8721B Datasheet - Page 23

• Manufacturer Part Number: KS8721B
• Description: Special Function IC
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KS8721B

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: 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-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 576-1006 - BOARD EVAL EXPERIMENT KS8721B
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

Symbol
10BaseTX Receive
R
V
10BaseTX Transmit (measured differentially after 1:1 transformer)
V
t
Clock Outputs
X1, X2
RXC
RXC
TXC
TXC
April 2005
KS8721B/BT
r
, t
SQ
P
IN
t
100
10
100
10
Parameter
RX+/RX– Differential
Input Resistance
Squelch Threshold
Peak Differential Output Voltage
Jitters Added
Rise/Fall Time
Crystal Oscillator
Receive Clock, 100TX
Receive Clock, 10T
Receive Clock Jitters
Transmit Clock, 100TX
Transmit Clock, 10T
Transmit Clock Jitters
Condition
5MHz square wave
50Ω from each output to V
50Ω from each output to V
23
DD
DD
Min
2.2
Typ
400
2.5
3.0
2.5
1.8
25
25
25
25
8
Max
±3.5
2.8
M9999-041405
Micrel, Inc.
ns
ns
Units
MHZ
MHZ
MHZ
MHZ
MHZ
(pk-pk)
(pk-pk)
mV
kΩ
ns
ns
V