KS8721B/BT
Micrel
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Supply Voltage
Supply Voltage
(V
V
(V
, V
, V
, V
,
(V
V
(V
, V
, V
, V
,
DDC DD_PLL DD_TX DD_RCV
DDC DD_PLL DD_TX DD_RCV
) ................................................... –0.5V to +3.0V
) .................................................... –0.5V to +4.0V
) ........................................... +2.375V to +2.625V
) ............... +2.375V to +2.625V or +3.0V to +3.6V
DD_RX
DD_RX
DDIO
DDIO
Input Voltage ............................................... –0.5V to +4.0V
Output Voltage ............................................ –0.5V to +4.0V
Lead Temperature (soldering, 10 sec.) ..................... 270°C
Ambient Temperature (T ) ........................... –0°C to +70°C
A
Package Thermal Resistance (Note 3)
TQFP (θ ) .....................................................69.64°C/W
JA
SSOP (θ ).....................................................42.91°C/W
JA
Storage Temperature (T ) ....................... –55°C to +150°C
S
Electrical Characteristics (Note 4)
VDD = 2.5V ±5%; TA = 0°C to +70°C; unless noted; bold values indicate –40°C ≤ TA ≤ +85°C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Total Supply Current (including TX output driver current)
IDD1
Normal 100BaseTX
110
150
40
130
180
60
mA
mA
mA
mA
IDD2
Normal 10BaseT (50% utilization)
Power Saving Mode 100BaseTX
Power Down Mode
IDD3
IDD5
5
TTL Inputs
VIH
Input High Voltage
VDD (I/O)
V
–0.8
VIL
Input Low Voltage
Input Current
0.8
10
V
IIN
VIN = GND ~ VDD
–10
µA
TTL Outputs
VOH
Output High Voltage
IOH = –4mA
VDD (I/O)
–0.4
V
VOL
Output Low Voltage
IOL = 4mA
0.4
10
V
|IOZ
|
Output Tr-State Leakage
µA
100BaseTX Receive
RIN RX+/RX– Differential Input
8
kΩ
Resistance
Propagation Delay
from magnetics to RDTX
50
110
ns
100BaseTX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
Output Voltage Imbalance
50Ω from each output to VDD
50Ω from each output to VDD
0.95
1.05
2
V
VIMB
tr, tt
%
Rise/Fall Time
Rise/Fall Time Imbalance
3
0
5
0.5
ns
ns
100BaseTX Transmit (measured differentially after 1:1 transformer)
Duty Cycle Distortion
Overshoot
±0.5
V
%
5
VSET
Reference Voltage of ISET
Propagation Delay
Jitters
0.75
45
ns
from TDTX to magentics
60
ns
0.7
1.4
ns(pk-pk
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating. Unused inputs must always be tied to an appropriate logic voltage level
(Ground to V ).
DD
Note 3. No HS (heat spreader) in package.
Note 4. Specification for packaged product only.
KS8721B/BT
22
August 2003
MICREL [ MICREL SEMICONDUCTOR ]
