Selection of Isolation Transformer(Note 1) One simple 1:1 isolation tr" />
參數(shù)資料
型號: KS8993-EVAL
廠商: Micrel Inc
文件頁數(shù): 28/35頁
文件大小: 0K
描述: BOARD EVAL EXPERIMENT FOR KS8993
標準包裝: 1
相關產(chǎn)品: KS8993I-ND - IC SWITCH 10/100 3PORT 128PQFP
KS8993-ND - IC SWITCH 10/100 3PORT 128PQFP
其它名稱: 576-1011
KS8993
Micrel
KS8993
34
May 2005
Selection of Isolation Transformer(Note 1)
One simple 1:1 isolation transformer is needed at the line interface. An isolation transformer with integrated common-mode
choke is recommended for exceeding FCC requirements. The following table gives recommended transformer characteristics.
Characteristics Name
Value
Test Condition
Turns Ratio
1 CT : 1 CT
Open-Circuit Inductance (min.)
350
H
100mV, 100 KHz, 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 to 65MHz
HIPOT (min.)
1500Vrms
Note 1.
The IEEE 802.3u standard for 100BaseTX assumes a transformer loss of 0.5 dB. For the transmit line transformer, insertion loss of up to
1.3dB can be compensated by increasing the line drive current by means of reducing the ISET resistor value.
Selection of Reference Crystal
An oscillator or crystal with the following typical characteristics is recommended.
Characteristics Name
Value
Units
Frequency
25.00000
MHz
Frequency Tolerance (max.)
±100
ppm
The following transformer vendors provide pin-to-pin compatible parts for Micrel’s device:
Type
Quad
Single
Vendor
Part
Vendor
Part
Transformer only
Pulse
H1060
Pulse
H1012
YCL
PH406080
YCL
20PMT04
Trans-Power
HB826-10
Trans-Power
HB614-1-LP
Integrated RJ45 and Transformer
Trans-Power
RJG4-754-C-NL
Trans-Power
RJ754-C-NL
Table 12. Qualified Transformer Lists
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相關代理商/技術參數(shù)
參數(shù)描述
KS8993F 功能描述:IC CONV MED 10/100 3PORT 128PQFP RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調(diào)幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA(27x27) 包裝:散裝
KS8993F-A1 功能描述:IC CONV MED 10/100 3PORT 128PQFP RoHS:否 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調(diào)幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA(27x27) 包裝:散裝
KS8993FA5 功能描述:IC SWITCH 3-PORT 10/100 128-PQFP RoHS:否 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調(diào)幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA(27x27) 包裝:散裝
KS8993F-EVAL 功能描述:EVAL KIT EXPERIMENTAL KS8993F RoHS:否 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 主要目的:電源管理,電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
KS8993FL 功能描述:IC CONV MED 10/100 SGL 128PQFP RoHS:否 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調(diào)幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA(27x27) 包裝:散裝