![background image](http://html.mh-extra.com/html/national-semiconductor/st-nic-dp83902a/st-nic-dp83902a_manual_710381052.webp)
14.0 Preliminary Electrical Characteristics
(Continued)
Preliminary DC Specifications
T
A
e
0
§
C to 70
§
C, V
CC
e
5V
g
5%, unless otherwise specified. (Continued)
Symbol
Parameter
Conditions
Min
Max
Units
AUI INTERFACE PINS (TX
g
, RX
g
, and CD
g
)
V
OD
Diff. Output Voltage (TX
g
)
78
X
Termination, and 270
X
g
550
g
1200
mV
from Each to GND
V
OB
Diff. Output Voltage Imbalance (TX
g
)
78
X
Termination, and 270
X
Typical: 40 mV
(Note 1)
from Each to GND
V
U
Undershoot Voltage (TX
g
) (Note 1)
78
X
Termination, and 270
X
Typical: 80 mV
from Each to GND
V
DS
Diff. Squelch Threshold
b
175
b
300
mV
(RX
g
and CD
g
) (Note 1)
V
CM
Diff. Input Common Mode Voltage
0
5.25
V
(RX
g
and CD
g
) (Note 1)
OSCILLATOR PINS (X1 AND X2)
V
IH
X1 Input High Voltage
X1 is Connected to an Oscillator
2.0
V
and GND/X2 is Grounded
V
IL
X1 Input Low Voltage
X1 is Connected to an Oscillator
0.8
V
and GND/X2 is Grounded
I
OSC
X1 Input Current
GND/X2 is Grounded
3
mA
V
IN
e
V
CC
or GND
I
X2
X2 Input Current
X2 Grounded
4
mA
(Driven Mode)
TWISTED PAIR INTERFACE PINS (TXO
g
, TXOd
g
, and RXI
g
)
R
TOL
TXOd
g
, TXO
g
Low Level
I
OL
e
25 mA
15
X
Output Resistance
R
TOH
TXOd
g
, TXO
g
High Level
I
OH
e
25 mA
15
X
Output Resistance
V
SRON1
Receive Threshold
g
300
g
585
mV
Turn-On Voltage (10BASE-T)
V
SRON2
Receive Threshold
g
175
g
300
mV
Turn-On Voltage (Reduced Level)
V
SROFF
Receive Threshold
g
175
V
SRON
b
100
mV
Turn-Off Voltage (Note 1)
V
DIFF
Differential Mode Input
V
CC
e
5.0V
b
3.1
a
3.1
V
Voltage Range (Note 1)
Note 1:
This parameter is guaranteed by design and is not tested.
51
Obsolete