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| 型号： | WJLXT908LC.A4 |
| 厂商： | INTEL CORP |
| 元件分类： | 网络接口 |
| 英文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP64 |
| 封装： | ROHS COMPLIANT, LQFP-64 |
| 文件页数： | 8/46页 |
| 文件大小： | 618K |
| 代理商： | WJLXT908LC.A4 |
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Intel
LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver
16
Datasheet
Document #: 249049
Revision #: 003
Rev. Date: 29-Oct-2005
Intel
LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver from the TXD pin through the
Manchester encoder/decoder to the RXD pin and returned to the back-end. This “normal” loopback
function is disabled when a data collision occurs, clearing the RXD circuit for the TPI data. Normal
loopback is also disabled during link fail and jabber states.
The Intel
LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver also provides three
additional loopback functions. An external loopback mode, useful for system-level testing, is
controlled by pin 21 (LEDC). When LEDC is tied Low, the Intel
LXT908 Universal 3.3 V
10BASE-T and AUI Transceiver disables the collision detection and internal loopback circuits, to
allow external loopback or full-duplex operation.
“Normal” twisted-pair loopback is controlled by pin 22 (LBK). When the twisted-pair port is
selected and LBK is High, twisted-pair loopback is “forced”, overriding collisions on the twisted-
pair circuit. When LBK is Low, normal loopback is in effect.
AUI loopback is also controlled by the LBK pin. When the AUI port is selected and LBK is High,
data transmitted by the back-end is internally looped back from the TXD pin through the
Manchester encoder/decoder to the RXD pin. When LBK is Low, no AUI loopback occurs.
2.1.8
Collision Detection Function
The collision detection function operates on the twisted-pair side of the interface. For standard
(half-duplex) 10BASE-T operation, a collision is defined as the simultaneous presence of valid
signals on both the TPI circuit and the TPO circuit. The Intel LXT908 Universal 3.3 V 10BASE-
T and AUI Transceiver reports collisions to the back-end via the COL pin. If the TPI circuit
becomes active while there is activity on the TPO circuit, the TPI data is passed to the back-end
over the RXD circuit, disabling normal loopback. Figure 6 is a state diagram of the Intel
LXT908
Universal 3.3 V 10BASE-T and AUI Transceiver collision detection function. Refer to Test
Specifications for collision detection and COL/CI output timing.
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| WJLXT908LE.A4 | 功能描述:IC 3V 10BASE-T/AUI TXCVR 64-LQFP 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:1,000 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| WJLXT908LE.A4-865811 | 制造商:Cortina Systems Inc 功能描述:Ethernet TXRX Single Chip 1-Port 3.3V 10Mbps 64-Pin LQFP |
| WJLXT908LE.A4-865812 | 制造商:Cortina Systems Inc 功能描述:LXT908 UNIVERSAL ETHERNET INTE |
| WJLXT908LEA4 | 制造商:Cortina Systems Inc 功能描述: |
| WJLXT971ALC.A4 | 功能描述:IC TRANS 3.3V ETHERNET 64-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
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