KS8721BT Micrel Inc, KS8721BT Datasheet - Page 23

• Manufacturer Part Number: KS8721BT
• Description: IC TXRX PHY 10/100 TX/FX 48TQFP
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KS8721BT

• Number Of Drivers/receivers: 1/1
• Protocol: MII, RMII
• Voltage - Supply: 2.375 V ~ 2.625 V
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• For Use With: 576-1009 - BOARD EVAL EXPERIMENT KS8721BT
• Lead Free Status / RoHS Status: Lead free / RoHS 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