參數(shù)資料
型號: KS8721SL-EVAL
廠商: Micrel Inc
文件頁數(shù): 25/33頁
文件大?。?/td> 0K
描述: BOARD EVAL EXPERIMENT KS8721SL
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,以太網(wǎng)控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8721SL
主要屬性: 1 個(gè)端口,100BASE-TX/100BASE-FX/10BASE-T
次要屬性: MII,RMII,自動(dòng) MDI,MDIX,>130 米線纜驅(qū)動(dòng)器,LDO,符合 IEEE802.3u 要求
已供物品:
相關(guān)產(chǎn)品: KS8721SLA4 TR-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SLA4-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SL-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SLI-ND - IC TXRX PHY 10/100 3.3V 48SSOP
KS8721SL TR-ND - IC TXRX PHY 10/100 3.3V 48SSOP
其它名稱: 576-1010
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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