參數(shù)資料
型號: KSZ8842-32MVLI
廠商: Micrel Inc
文件頁數(shù): 41/141頁
文件大?。?/td> 0K
描述: IC SWITCH ETH 2P 32BIT 128LQFP
標準包裝: 90
控制器類型: 以太網(wǎng)開關(guān)控制器
接口: PCI
電源電壓: 3.1 V ~ 3.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP
供應商設(shè)備封裝: 128-LQFP(14x14)
包裝: 托盤
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
配用: 576-1635-ND - BOARD EVALUATION KSZ8842-16MVL
其它名稱: 576-3270
Micrel, Inc.
KSZ8842-16/32 MQL/MVL/MVLI/MBL
October 2007
135
M9999-102207-1.9
Selection of Isolation Transformers
A 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode choke
is recommended to exceed FCC requirements.
Table 35 gives recommended transformer characteristics.
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (min)
350
H
100mV, 100kHz, 8mA
Leakage inductance (max)
0.4
H
1MHz (min)
Inter-winding capacitance (max)
12pF
D.C. resistance (max)
0.9
Insertion loss (max)
1.0dB
0MHz – 65MHz
HIPOT (min)
1500Vrms
Table 35. Transformer Selection Criteria
Magnetic Manufacturer
Part Number
Auto MDI-X
Number of Port
Pulse
H1102
Yes
1
Pulse (low cost)
H1260
Yes
1
Transpower
HB726
Yes
1
Bel Fuse
S558-5999-U7
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
TDK (Mag Jack)
TLA-6T718
Yes
1
Table 36. Qualified Single Port Magnetic
Selection of Reference Crystal
Chacteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
25
Table 37. Typical Reference Crystal Characteristics
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