LXT905 Ver la hoja de datos (PDF) - Level One

Número de pieza

componentes Descripción

Lista de partido

LXT905

Universal ethernet interface adapter

Level One 

/;7äíè 8QLYHUVDO (WKHUQHW ,QWHUIDFH $GDSWHU

7DEOH ìã /;7äíè 6LJQDO 'HVFULSWLRQV ¤ FRQWLQXHG

/4)3 3/&&

3LQ ú 3LQ ú

6\PERO

,î2

'HVFULSWLRQ

ç

ìí

/('&î

2 LED Collision RU Full Duplex Enableï

FDE

, LEDC is an open drain driver for the collision indicator pulls Low during

collision. LED “on” (i.e., Low output) time is extended by approximately

100 ms.

)'( HQDEOHV IXOO GXSOH[ PRGH õH[WHUQDO ORRSEDFNô LI WLHG /RZ H[WHUQDOO\ï

3XOOHG KLJK LQWHUQDOO\ï

æ

ìì

/('7î

2 /(' 7UDQVPLW RU 3RZHU 'RZQï

3'1

, /('7 LV DQ RSHQ GUDLQ GULYHU IRU WKH WUDQVPLW LQGLFDWRUï /(' ¦RQ§ õLïHïñ

/RZ RXWSXWô WLPH LV H[WHQGHG E\ DSSUR[LPDWHO\ ìíí PVï 2XWSXW LV SXOOHG

/RZ GXULQJ WUDQVPLWï

,I H[WHUQDOO\ WLHG /RZñ WKH /;7äíè JRHV WR SRZHU GRZQ VWDWH õ3'1ôï ,Q

3RZHUðGRZQ 0RGHñ DOO ORJLF LQSXWV DQG RXWSXWV DUH WULVWDWHGï

å

ìë

/('5

2 LED Receiveï Open drain driver for the receive indicator LED. LED

“on” (i.e., Low output) time is extended by approximately 100 ms. Output

is pulled Low during receive. Pulled High internally.

ä

ìê

/('/

2 LED Linkï Open drain driver for link integrity indicator. Output is pulled

Low during link test pass. Pulled High internally.

ìí

ìé

&'

2 Carrier Detectï An output for notifying the controller that activity exists

on the network.

ìé

ìç

5&/.

2 Receive Clockï A recovered 10 MHz clock which is synchronous to the

received data and connected to the controller receive clock input.

ìè

ìæ

5;'

2 Receive Dataï Output signal connected directly to the receive data input

of the controller.

ìç

ìå

/,

, Link Enableï Controls link integrity test; enabled when LI is High, dis-

abled when LI is Low.

ìæ

ìä

5%,$6

, Bias Circuitryï A 7.5 kΩ 1% resistor to ground at this pin controls operat-

ing circuit bias.

ìå

ëí

'64(

, SQE Disableï When DSQE is High, the SQE function is disabled.

When DSQE is Low, the SQE function is enabled. SQE should be dis-

abled for normal operation in Hub/Switch/Repeater applications. Pulled

Low internally.

ìä

ëì

7323

2 Twisted Pair Outputsï Differential outputs to the twisted-pair cable. The

ëë

ëé

7321

2 outputs are pre-equalized.

ëê

ëè

ëé

ëç

0'2

0',

, Mode Select 0 DQG ìï Mode select pins determine controller compatibility

, mode in accordance with Table 2. Pulled Low internally.

ëè

ëæ

ëç

ëå

73,3

73,1

, Twisted-Pair ,QSXWVï A differential input pair from the twisted-pair cable.

, Receive filter is integrated on-chip. No external filters are required.

ììðæé

L1

Share Link: