參數(shù)資料
型號: KSZ8721SL
廠商: Micrel Inc
文件頁數(shù): 25/33頁
文件大?。?/td> 0K
描述: IC TXRX PHY 10/100 3.3V 48-SSOP
標準包裝: 30
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: IEEE 802
電源電壓: 3 V ~ 3.6 V
安裝類型: 表面貼裝
封裝/外殼: 48-BSSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 48-SSOP
包裝: 管件
產(chǎn)品目錄頁面: 1080 (CN2011-ZH PDF)
配用: 576-1630-ND - BOARD EVALUATION FOR KSZ8721SL
其它名稱: 576-1031-5
576-1512-5
576-1512-5-ND
KSZ8721SL-ND
May 2004
31
M9999-051704
KS8721BL/SL
Micrel
Single Port
Number
Magnetic Manufacturer
Part Number
Auto-MDI-X
of Ports
Pulse
H1102
Yes
1
Bel Fuse
S558-5999-U7
Yes
1
YCL
PH163112
Yes
1
Transpower
HB726
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
Table 9. Qualified Transformer List
Selection of Isolation Transformer(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.
Characteristic
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 to 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.
Characteristic
Value
Units
Frequency
25.00000
MHz
Frequency Tolerance (max.)
±100
ppm
Load Capacitance (max.)
20
pF
Series Resistance (max.)
25
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