參數(shù)資料
型號： KSZ8721BL
廠商： Micrel Inc
文件頁數(shù)： 8/35頁
文件大?。?/td> 0K
描述： IC TXRX PHY 10/100 3.3V 48-LQFP
標準包裝： 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： 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： 管件
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： 576-1028-5
576-1511-5
576-1511-5-ND
KSZ8721BL-ND
Micrel, Inc.
KS8721BL/SL
June 2009
16
M9999-062509-1.3
10/100 BASE-T
Media Dependent Interface
10/100 BASE-T
Media Dependent Interface
Transmit Pair
Receive Pair
Transmit Pair
Receive Pair
Modular Connector (RJ45)
HUB
(Repeater or Switch)
Modular Connector (RJ45)
HUB
(Repeater or Switch)
Figure 2. Crossover Cable
Power Management
The KS8721BL/SL offers the following modes for power management:
Power-Down Mode: This mode can be achieved by writing to Register 0.11 or pulling pin 30 PD# low.
Power-Saving Mode: This mode can be disabled by writing to Register 1fh.10. The KS8721BL/SL turns off
everything except for the Energy Detect and PLL circuits when the cable is not installed. In other words, the
KS8721BL/SL shuts down most of the internal circuits to save power if there is no link. Power-saving mode is in
the most effective state when auto-negotiation mode is enabled.
100BT FX Mode
Please contact your local eld application engineer (FAE) for a reference schematic on ber connection.
100BT FX mode is activated when FXSD/FXEN is higher than 0.6V (this pin has a default pull down). Under this mode,
the auto-negotiation and auto-MDI-X features are disabled.
In ber operation, the FXSD pin should connect to the signal detect (SD) output of the ber module. The internal
threshold of FXSD is around 1/2 VDD ±50mV (1.25V ±0.05V). Above this level, the ber signal is considered detected.
The operation is summarized in the following table:
FXSD/FXEN
Condition
Less than 0.6V
100TX mode
Less than 1.25V,
but greater than 0.6V
FX mode
No signal detected
FEF generated
Greater than 1.25
FX mode
Signal detected
Table 1. 100BT FX Mode
To ensure proper operation, the swing of ber module SD should cover the threshold variation. A resistive voltage
divider is recommended to adjust the SD voltage range.
Far End Fault (FEF), repetition of a special pattern which consists of 84-one and 1-zero, is generated under “FX mode
with no signal detected.” The purpose of FEF is to notify the sender of a faulty link. When receiving an FEF, the LINK
will go down to indicate a fault, even with ber signal detected. The transmitter is not affected by receiving an FEF and
相關(guān)PDF資料
PDF描述
VE-JNJ-MW-F4 CONVERTER MOD DC/DC 36V 100W
AD7225BRS IC DAC 8BIT QUAD W/AMP 24-SSOP
VE-JNJ-MW-F3 CONVERTER MOD DC/DC 36V 100W
85106P106PW50 CONN PLUG STRAIGHT 6POS W/PIN
VE-JNJ-MW-F1 CONVERTER MOD DC/DC 36V 100W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KSZ8721BL A4 制造商:Micrel Inc 功能描述:PHY 1-CH 10Mbps/100Mbps 48-Pin LQFP
KSZ8721BL A4 TR 制造商:Micrel Inc 功能描述:PHY 1-CH 10Mbps/100Mbps 48-Pin LQFP T/R
KSZ8721BL TR 功能描述:以太網(wǎng) IC 10/100 Base-TX/FX Physical Layer Transceiver, Single 3.3V Supply, 48-LQFP (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
KSZ8721BLA4 功能描述:TXRX 10/100 3.3V 48-SSOP 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
KSZ8721BLA4 TR 功能描述:TXRX 10/100 3.3V 48-SSOP 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
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*