參數(shù)資料
型號(hào): KSZ8851SNL-EVAL
廠商: Micrel Inc
文件頁數(shù): 75/80頁
文件大?。?/td> 0K
描述: BOARD EVALUATION KSZ8851SNL
產(chǎn)品培訓(xùn)模塊: KSZ8851 10/100 Embedded Controllers
標(biāo)準(zhǔn)包裝: 1
系列: LinkMD®
主要目的: 接口,以太網(wǎng)控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8851SNL
主要屬性: 1 個(gè)端口,100BASE-TX/10BASE-T
次要屬性: SPI 接口,LinkMD 線纜診斷
已供物品: 板,文檔
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 576-3299-6-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3299-1-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3299-2-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3254-ND - IC CTLR MAC/PHY NON-PCI 32-QFN
其它名稱: 576-3293
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
77
M9999-083109-2.0
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 for exceeding FCC requirements.
Table 20 gives recommended transformer characteristics.
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (min)
350
μH
100mV, 100kHz, 8mA
Leakage inductance (max)
0.4
μH
1MHz (min)
Inter-winding capacitance (max)
12pF
D.C. resistance (max)
0.9
Ω
Insertion loss (max)
1.0dB
0MHz – 65MHz
HIPOT (min)
1500Vrms
Table 20. 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 21. Qualified Single Port Magnetics
Selection of Reference Crystal
Chacteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
40
Ω
Table 22. Typical Reference Crystal Characteristics
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