參數(shù)資料
型號: KS8721BL
廠商: Micrel Inc
文件頁數(shù): 27/35頁
文件大小: 0K
描述: IC TXRX PHY 10/100 3.3V 48LQFP
標(biāo)準包裝: 250
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: MII,RMII
電源電壓: 2.375 V ~ 2.625 V
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 托盤
配用: 576-1007-ND - BOARD EVAL EXPERIMENT KS8721BL
Micrel, Inc.
KS8721BL/SL
June 2009
33
M9999-062509-1.3
Selection of Isolation Transformers
(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.
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
Note
:
1.
The IEEE 802.3u standard for 100BASE-TX assumes a transformer loss of 0.5dB. For the transmit line transformer, insertion loss of up to 1.3dB
can be compensated or by increasing the line drive current by means of reducing the ISET resistor value. Please select the transformer that
supports auto-MDI/MDI-X.
Selection of Reference Crystal
An oscillator or crystal with the following typical characteristics is recommended.
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±100
ppm
Load capacitance (max)
20
pF
Series resistance (max)
40
Ω
Single Port Magnetic Manufacturer
Part Number
Auto MDIX
Number of Ports
Pulse
H1102
Yes
1
Bel Fuse
S558-5999-U7
Yes
1
YCL
PT163020
Yes
1
Transpower
HB726
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
Integrated Transformers
Pulse
J0011D21
Yes
1
Pulse
J00-0061
Yes
1
Table 9. Qualified Transformer Lists
相關(guān)PDF資料
PDF描述
VI-J5J-MX-F2 CONVERTER MOD DC/DC 36V 75W
VI-J4H-MW-B1 CONVERTER MOD DC/DC 52V 100W
VI-21V-IW-B1 CONVERTER MOD DC/DC 5.8V 100W
VI-J5J-MX-F1 CONVERTER MOD DC/DC 36V 75W
VE-B1Y-IU-B1 CONVERTER MOD DC/DC 3.3V 132W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KS8721BL A4 制造商:Micrel Inc 功能描述:PHY 1-CH 10Mbps/100Mbps 48-Pin LQFP
KS8721BL TR 功能描述:IC TXRX PHY 10/100 3.3V 48LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器,接收器,收發(fā)器 系列:- 標(biāo)準包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND
KS8721BL_11 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver
KS8721BLA4 功能描述:TXRX 10/100 3.3V 48-LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器,接收器,收發(fā)器 系列:- 標(biāo)準包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND
KS8721BLA4 TR 功能描述:TXRX 10/100 3.3V 48-LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器,接收器,收發(fā)器 系列:- 標(biāo)準包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND