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PDF LXT901 Data sheet ( Hoja de datos )
| Número de pieza | LXT901 | |
| Descripción | (LXT901 / LXT907) Universal 10 Base-T and AUI Transceivers | |
| Fabricantes | Intel | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LXT901 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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LXetT49U0.c1o/m907Universal 10BASE-T and AUI Transceivers
She Datasheet
ta The LXT901 and LXT907 Universal 10BASE-T and AUI Transceivers are designed for IEEE
a 802.3 physical layer applications. They provide all the active circuitry to interface most standard
.D 802.3 controllers to either the 10BASE-T media or Attachment Unit Interface (AUI). In
w addition to standard 10 Mbps Ethernet, they also support full-duplex operation at 20 Mbps.
w The LXT901 and LXT907 are identical except for the function of one pin. The LXT901 offers
w selectable termination impedance to allow the use of either shielded or unshielded twisted-pair
mcable. The LXT907 offers a signal quality error (SQE) disable function.
oCommon LXT901 and LXT907 functions include Manchester encoding/decoding, receiver
squelch and transmit pulse shaping, jabber, link testing and reversed polarity detection/
.ccorrection. Integrated filters simplify the design work required for FCC-compliant EMI
performance.
UApplications
t4s 10BASE-T hub and switching products
eeProduct Features
s Computer/Workstation 10BASE-T LAN
adapters
hFunctional Features
Ss Integrated Manchester Encoder/Decoder
tas 10BASE-T Transceiver
s AUI Transceiver
s Full-Duplex Capable (20 Mbps)
aDiagnostic Features
.Ds Four LED Drivers
s AUI/RJ45 Loopback
s Remote Signaling of Link Down and
wJabber conditions
Convenience Features
s Automatic/Manual AUI/RJ45 Selection
s Automatic Polarity Correction
s SQE Disable function (LXT907 only)
s Programmable Impedance Driver (LXT901
only)
s Power Down Mode and four loopback
modes
s LXT901 available in 64-pin LQFP and 44-
pin PLCC
s LXT907 available in 44-pin PLCC
ww .DataSheet4U.comAs of January 15, 2001, this document replaces the Level One document
wwwLXT901/907 — Universal 10BASE-T and AUI Transceivers.
Order Number: 249097-001
January 2001
1 page  
Universal 10BASE-T and AUI Transceivers — LXT901/907
Tables
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LXT901/907 Signal Descriptions ........................................................................... 9
Controller Compatibility Modes ...........................................................................13
Crystal Specifications ..........................................................................................20
Suitable Crystals .................................................................................................20
Suitable Magnetics ..............................................................................................21
Absolute Maximum Ratings.................................................................................31
Recommended Operating Conditions .................................................................31
I/O Electrical Characteristics ...............................................................................31
AUI Electrical Characteristics ..............................................................................32
TP Electrical Characteristics ...............................................................................32
Switching Characteristics ....................................................................................33
RCLK/Start-of-Frame Timing...............................................................................33
RCLK/End-of-Frame Timing................................................................................33
Transmit Timing...................................................................................................34
Collision, COL/CI Output and Loopback Timing..................................................34
Datasheet
5
5 Page 
Universal 10BASE-T and AUI Transceivers — LXT901/907
Table 1. LXT901/907 Signal Descriptions (Continued)
PLCC LQFP
Symbol
I/O
Description
41 4
42 5
DIP I AUI Receive Pair. Differential input pair from the AUI transceiver DI circuit. The
DIN I input is Manchester encoded.
43 7
44 8
DOP
DON
O AUI Transmit Pair. A differential output driver pair for the AUI transceiver cable.
O The output is Manchester encoded.
1, 2, 6,
16, 17,
20, 30,
31, 32,
– 33, 41, N/C
43, 48,
49, 50,
60, 63,
64
– No Connect (Internally tied to ground).
1. I/O Column Coding: I = Input, O = Output, OD = Open Drain
Datasheet
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LXT901.PDF ] | |
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