參數(shù)資料
型號(hào)： LXT971A
廠商： Intel Corp.
英文描述： 3.3V Dual-Speed Fast Ethernet PHY Transceiver
中文描述： 3.3雙速快速以太網(wǎng)物理層收發(fā)器
文件頁數(shù)： 57/90頁
文件大小： 568K
代理商： LXT971A
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
57
Table 19. Digital I/O Characteristics
2
Parameter
Symbol
Min
Typ
1
Max
Units
Test Conditions
Input Low voltage
V
IL
–
–
0.8
V
–
Input High voltage
V
IH
2.0
–
–
V
–
Input current
I
I
-10
–
10
μ
A
0.0 < V
I
< V
CC
Output Low voltage
V
OL
–
–
0.4
V
I
OL
= 4 mA
Output High voltage
V
OH
2.4
–
–
V
I
OH
= -4 mA
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
testing.
2. Applies to all pins except MII, LED, XI/XO, and SD/TP pins. Refer to
Table 20
for MII I/O Characteristics,
Table 21
for XI/XO and
Table 22
for LED Characteristics.
Table 20. Digital I/O Characteristics - MII Pins
Parameter
Symbol
Min
Typ
1
Max
Units
Test Conditions
Input Low voltage
V
IL
–
–
0.8
V
–
Input High voltage
V
IH
2.0
–
–
V
–
Input current
I
I
-10
–
10
μ
A
0.0 < V
I
< VCCIO
Output Low voltage
V
OL
–
–
0.4
V
I
OL
= 4 mA
Output High voltage
V
OH
2.2
–
–
V
I
OH
= -4 mA, VCCIO = 3.3V
V
OH
2.0
–
–
V
I
OH
= -4 mA, VCCIO = 2.5V
Driver output resistance
(Line driver output enabled)
R
O
2
–
100
–
W
VCCIO = 2.5V
R
O
2
–
100
–
W
VCCIO = 3.3V
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.
Table 21. I/O Characteristics - REFCLK/XI and XO Pins
Parameter
Symbol
Min
Typ
1
Max
Units
Test Conditions
Input Low Voltage
V
IL
–
–
0.8
V
–
Input High Voltage
V
IH
2.0
–
–
V
–
Input Clock Frequency Tolerance
2
f
–
–
±
100
ppm
–
Input Clock Duty Cycle
2
Tdc
35
–
65
%
–
Input Capacitance
C
IN
–
3.0
–
pF
–
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.
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