参数资料
| 型号： | KS8721BLI |
| 厂商： | Micrel Inc |
| 文件页数： | 8/35页 |
| 文件大小： | 0K |
| 描述： | IC TXRX PHY 10/100 3.3V 48LQFP |
| 标准包装： | 250 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | MII，RMII |
| 电源电压： | 2.375 V ~ 2.625 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
| 配用： | 576-1007-ND - BOARD EVAL EXPERIMENT KS8721BL |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
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
相关PDF资料 |
PDF描述 |
|---|---|
| MS27468T23B21SB | CONN RCPT 21POS JAM NUT W/SCKT |
| VI-J74-MX-F4 | CONVERTER MOD DC/DC 48V 75W |
| MC100EL16DTR2 | IC RCVR ECL DIFFERENTL 5V 8TSSOP |
| LT1140ACN#PBF | IC 5DRV/3RCV RS232 5V 24-DIP |
| MC100E416FNR2G | IC LINE RCVR QUINT DIFF 28-PLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| KS8721BLI TR | 功能描述:TXRX 10/100 3.3V 48-LQFP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:1,140 系列:AU 类型:收发器 驱动器/接收器数:1/1 规程:CAN 电源电压:5.3 V ~ 27 V 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:管件 其它名称:935267940512AU5790D14AU5790D14-ND |
| KS8721BMCEVAL | 制造商:Micrel 功能描述:Evaluation Kit For 2.5V 10/100 Base TX/FX MII Physical Layer Transceiver |
| KS8721BMC-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8721BMC RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| KS8721BT | 功能描述:IC TXRX PHY 10/100 TX/FX 48TQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:1,140 系列:AU 类型:收发器 驱动器/接收器数:1/1 规程:CAN 电源电压:5.3 V ~ 27 V 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:管件 其它名称:935267940512AU5790D14AU5790D14-ND |
| KS8721BT-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8721BT RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
发布紧急采购，3分钟左右您将得到回复。