Datasheet
Micrel, Inc. KS8999
January 2005
39
KS8999
Absolute Maximum Ratings
(1)
Supply Voltage
(V
DD
_
RX,
V
DD
_
TX,
V
DD
_
RCV,
V
DD,
V
DD
_
PLLTX,
) ....................................... –0.5V to +2.3V
(V
DDIO
) ............................................. –0.5V to +3.8V
Input Voltage ......................................... –0.5V to +4.0V
Output Voltage ...................................... –0.5V to +4.0V
Lead Temperature (soldering, 10 sec)................ 270°C
Storage Temperature (T
S
)..................–55°C to +150°C
Operating Ratings
(2)
Supply Voltage
(V
DD
_
RX,
V
DD
_
TX,
V
DD
_
RCV,
V
DD,
V
DD
_
PLLTX,
)........................................+2.0V to +2.3V
V
DDIO
) ................. +2.0V to _2.3V or +3.0V to +3.6V
Ambient Temperature (T
A
)
Commercial ......................................–0°C to +70°C
Industrial.........................................–40°C to +85°C
Package Thermal Resistance
(3)
PQFP (θ
JA
) No Air Flow........................... 39.1°C/W
Electrical Characteristics (KS8999)
(4)
V
DD
= 2.0V to 2.3V; T
A
= 0°C to +70°; unless noted.
Symbol Parameter Condition Min Typ Max Units
V
DD
Supply Voltage 2.00 2.10 2.30 V
Supply Current (including TX output driver current)
100BaseTX Operation—Total
0.64 0.85 A
I
DX
100BaseTX (Transmitter) 0.35 0.40 A
I
DA
100BaseTX (Analog) 0.18 0.25 A
I
DD
100BaseTX (Digital) 0.11 0.20 A
10BaseT Operation—Total
1.04 1.32 A
I
DX
100BaseTX (Transmitter) 0.84 0.95 A
I
DA
100BaseTX (Analog) 0.11 0.17 A
I
DD
100BaseTX (Digital) 0.09 0.20 A
TTL Inputs
V
IH
Input High Voltage
(1/2 V
DDIO
)
+0.4
V
V
IL
Input Low Voltage
(1/2 V
DDIO
)
–0.4
V
I
IN
Input Current V
IN
= GND ~V
DD
–10 10 µA
TTL Outputs
V
OH
Output High Voltage I
OH
= –4mA
V
DDIO
–0.4
V
V
OL
Output Low Voltage I
OL
= 4mA +0.4 V
|I
OZ
| Output Tri-State Leakage 10 µA
100BaseTX Transmit (measured differentially after 1:1 transformer)
V
O
Peak Differential Output Voltage 50Ωfrom each output to V
DD
0.95 1.05 V
V
IMB
Output Voltage Imbalance 50Ωfrom each output to V
DD
2 %
Rise/Fall Time 3 5 ns
t
r
, t
t
Rise/Fall Time Imbalance 0 0.5 Ns
Notes:
1. Exceeding the absolute maximum rating may damage the device.
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
).
3. No HS (heat spreader) in package.
4. Specification for packaged product only.