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參數(shù)資料
| 型號(hào)： | LXT970A |
| 廠商： | Intel Corp. |
| 英文描述： | Dual-Speed Fast Ethernet Transceiver |
| 中文描述： | 雙速度快速以太網(wǎng)收發(fā)器 |
| 文件頁(yè)數(shù)： | 41/74頁(yè) |
| 文件大?。?/td> | 1061K |
| 代理商： | LXT970A |
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Dual-Speed Fast Ethernet Transceiver
—
LXT970A
Datasheet
41
3.0
Application Information
3.1
Magnetics Information
The LXT970A requires a 1:1 ratio for both the receive and the transmit transformers. Refer to
Table 18
for magnetics requirements.
A cross-reference list of magnetic manufacturers and part numbers is available in
Application Note
73, Magnetic Manufacturers
, which can be found on the Intel web site (developer.intel.com/design/
network/). Designers must test and evaluate all components for suitability in their applications.
3.2
Crystal Information
The LXT970A requires a parallel-resonant fundamental-mode crystal that meet specifications as
shown in
Table 19
. XI and XO input capacitance and voltage requirements are provided in
Table 25
on page 48
.
Crystals are available from various manufacturers. Designers should test and validate all crystals
before committing to a specific component. Based on limited evaluation,
Table 20
provides
suitable crystal component manufacturers.
Table 18. Magnetics Requirements
Parameter
Min
Nom
Max
Units
Test Condition
Rx and Tx Turns Ratio
–
1:1
–
–
Insertion Loss
0.0
–
1.1
dB
Primary Inductance
350
–
–
μ
H
Transformer Isolation
–
2
–
kV
Differential to common mode rejection
–
–
-40
dB
.1 to 60 MHz
–
–
-35
dB
60 to 100 MHz
Return Loss
–
–
-17
dB
.1 to 60 MHz
–
–
-15
dB
60 to 100 MHz
Rise Time
2.0
–
3.5
ns
10% to 90%
Table 19. Crystal Requirements
Parameter
Min
Nom
Max
Units
Test Condition
Frequency
–
25.0
–
MHz
Frequency Stability
–
–
±100
ppm
-40 - 85
o
C
1. See
Table 25
(Clock Characteristics) for additional device specifications.
Table 20. Crystal Component Manufacturers
Component
Manufacturer
Part Number
Crystal
Epson America
MA-505-25.000M
Caliber Electronics
AA18C1-25.000MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LXT970 | Fast Ethernet Transceiver |
| LXT970QC | Fast Ethernet Transceiver |
| LXT971A | 3.3V Dual-Speed Fast Ethernet PHY Transceiver |
| LXT972A | 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet |
| LXT972ALC | 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LXT970AQC | 制造商:LEVEL ONE 功能描述: 制造商:LEVELONE 功能描述: 制造商: 功能描述: 制造商:LEVEL1 功能描述: |
| LXT970AQC.B11 | 制造商:Intel 功能描述: |
| LXT970ATC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| LXT970QC | 制造商:LEVEL ONE 功能描述: 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One Communications 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP |
| LXT971A | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet PHY Transceiver |
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