LXT972 Level One, LXT972 Datasheet - Page 37

• Manufacturer Part Number: LXT972
• Description: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
• Manufacturer: Level One

Table 18: Digital I/O Characteristics
Table 19: Digital I/O Characteristics - MII Pins
Table 20: I/O Characteristics - REFCLK/XI and XO Pins
Input Low voltage
Input High voltage
Input current
Output Low voltage
Output High voltage
1. Applies to all pins except MII , LED and XI/XO pins. Refer to
2. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Input Low voltage
Input High voltage
Input current
Output Low voltage
Output High voltage
Driver output resistance
(Line driver output enabled)
Input Low Voltage
Input High Voltage
Input Clock Frequency Tolerance
Input Clock Duty Cycle
Input Capacitance
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
2. Parameter is guaranteed by design; not subject to production testing.
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
2. Parameter is guaranteed by design; not subject to production testing.
Characteristics.
Parameter
Parameter
Parameter
2
Symbol
V
V
V
V
2
I
OL
OH
IH
IL
I
Symbol
Sym
V
V
V
R
R
V
T
V
V
V
C
I
OL
OH
OH
O 2
O
DC
IL
IH
IH
IN
I
IL
f
2
Min
-10
2.0
2.4
1
Min
–
–
2.0
40
–
–
–
Min
-10
2.0
2.2
2.0
–
–
–
–
Typ
Table 19
3.0
–
–
–
–
Typ
Typ
100
100
1
–
–
–
–
–
–
–
–
–
–
–
1
2
for MII I/O Characteristics,
Max
0.8
60
–
100
–
Max
0.8
0.4
10
–
–
–
–
–
LXT972 Preliminary Test Specifications
Max
0.8
0.4
Units
10
–
–
ppm
pF
%
V
V
Units
V
V
V
V
V
A
Units
0.0 < V
I
I
I
VCCIO = 2.5V
VCCIO = 3.3V
V
V
V
V
OL
OH
OH
A
Table 20
= 4 mA
= -4 mA, VCCIO = 3.3V
= -4 mA, VCCIO = 2.5V
Test Conditions
I
0.0 < V
I
I
Test Conditions
< VCCIO
for XI/XO and
OL
OH
= 4 mA
Test Conditions
= -4 mA
I
< V
–
–
CC
Table 21
–
–
for LED
37