參數(shù)資料
型號: KSZ8721BL TR
廠商: Micrel Inc
文件頁數(shù): 27/35頁
文件大?。?/td> 0K
描述: IC TXRX PHY 10/100 3.3V 48LQFP
標(biāo)準包裝: 1
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: 3 V ~ 3.6 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: 標(biāo)準包裝
產(chǎn)品目錄頁面: 1080 (CN2011-ZH PDF)
配用: 576-1627-ND - BOARD EVALUATION FOR KSZ8721BMC
576-1626-ND - BOARD EVALUATION FOR KSZ8721BL
其它名稱: 576-1028-6
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
ADM3490ARZ IC TXRX RS-422/485 3.3V 8-SOIC
JBXEA1G07FPSDS CONN RCPT 7POS DBL NUT SKT SLD
ADM3485ARZ IC TXRX RS-485 HS 3.3V 8-SOIC
VI-25N-CU-F4 CONVERTER MOD DC/DC 18.5V 200W
JBXEA1G04FSSDS CONN RCPT 4POS DOUBLE NUT SOLDER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KSZ8721BMC-EVAL 功能描述:以太網(wǎng)開發(fā)工具 KSZ8721BMC Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓:
KSZ8721BT 功能描述:以太網(wǎng) IC 10/100 Base-TX/FX Physical Layer Transceiver, Single 3.3V Supply, 48-TQFP (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8721BTA4 功能描述:TXRX 10/100 3.3V 48-TQFP RoHS:是 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
KSZ8721BT-EVAL 功能描述:以太網(wǎng)開發(fā)工具 KSZ8721BT Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓:
KSZ8721BTR 制造商:Micrel 功能描述:Physical Layer Transceiver 1Ch 100Mbps