lxt971a Intel Corporation, lxt971a Datasheet - Page 57

• Manufacturer Part Number: lxt971a
• Description: 3.3v Dual-speed Fast Ethernet Phy Transceiver
• Manufacturer: Intel Corporation

Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
Table 19. Digital I/O Characteristics
Table 20. Digital I/O Characteristics - MII Pins
Table 21. I/O Characteristics - REFCLK/XI and XO Pins
Input Low voltage
Input High voltage
Input current
Output Low voltage
Output High voltage
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
2. Applies to all pins except MII, LED, XI/XO, and SD/TP pins. Refer to
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
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
2. Parameter is guaranteed by design; not subject to production testing.
testing.
Table 21
testing.
testing.
Parameter
Parameter
Parameter
for XI/XO and
2
Symbol
V
V
Table 22
V
V
I
OH
OL
IL
IH
I
2
2
Symbol
V
V
V
R
R
V
V
for LED Characteristics.
I
OH
OH
OL
O
O
IH
IL
I
2
2
Symbol
Min
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
-10
2.0
2.4
Tdc
–
–
C
V
V
'f
IH
IL
IN
Min
2.0
-10
2.2
2.0
–
–
–
–
Typ
Min
2.0
35
–
–
–
–
–
–
–
–
Typ
1
100
100
–
–
–
–
–
–
1
Typ
3.0
–
–
–
–
1
Max
Max
0.8
0.4
10
0.8
0.4
10
–
–
–
–
–
–
–
r
Max
0.8
65
–
100
–
Table 20
Units
P A
W
W
V
V
V
V
V
Units
P A
V
V
V
V
Units
ppm
pF
%
V
V
for MII I/O Characteristics,
I
I
OH
OH
= -4 mA, VCCIO = 3.3V
= -4 mA, VCCIO = 2.5V
0.0 < V
Test Conditions
VCCIO = 2.5V
VCCIO = 3.3V
Test Conditions
Test Conditions
I
0.0 < V
OL
I
I
OH
OL
= 4 mA
I
–
–
= -4 mA
< VCCIO
= 4 mA
–
–
–
–
–
–
–
I
< V
CC
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