LXT975

Features: ` Four independent IEEE 802.3-compliant 10BASE-T or 100BASETX ports in a single chip.` 100BASE-FX fiber-optic capable.`Standard CSMA/CD or full-duplex operation.`Supports auto-negotiation and legacy systems without auto-negotiation capability. ` Baseline wander correction.` 100BASE-TX li...

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LXT975 Picture
SeekIC No. : 004403667 Detail

LXT975: Features: ` Four independent IEEE 802.3-compliant 10BASE-T or 100BASETX ports in a single chip.` 100BASE-FX fiber-optic capable.`Standard CSMA/CD or full-duplex operation.`Supports auto-negotiation ...

floor Price/Ceiling Price

Part Number:
LXT975
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2020/4/1

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Product Details

Description



Features:

 ` Four independent IEEE 802.3-compliant 10BASE-T or 100BASETX ports in a single chip.
 ` 100BASE-FX fiber-optic capable.
 ` Standard CSMA/CD or full-duplex operation.
 ` Supports auto-negotiation and legacy systems without auto-negotiation capability.
 ` Baseline wander correction.
 ` 100BASE-TX line performance over 130 meters.
 ` Configurable LED drivers and serial LED output.
 ` Configurable through MII serial port or via external control pins.
 ` Available in 160-pin PQFP with heat spreader.
 ` Commercial temperature range (0-70oC ambient).
 ` Part numbers:
     -LXT974AHC
     -LXT974BHC
     -LXT975AHC
     -LXT975BHC



Application

 ·  10BASE-T, 10/100-TX, or 100BASEFX Switches and multi-port NICs.
 ·  LXT975 optimized for dual-high stacked modular RJ-45 applications.



Pinout

  Connection Diagram


Specifications

Parameter
Sym
Min
Max
Units
Supply voltage
VCC
-0.3
6
V
Operating temperature
Ambient
TOPA
-15
85
Case
TOPC
-
+120
Storage temperature
TST
-65
+150
Caution Exceeding these values may cause permanent damage.
Functional operation under these conditions is not implied.
Exposure to maximum rating conditions for extended periods may affect device reliability.



Description

The LXT974 and LXT975 are four-port PHY Fast Ethernet Transceivers which support IEEE 802.3 physical layer applications at both 10 Mbps and 100 Mbps. They provide all of the active circuitry to interface four 802.3 Media Independent Interface (MII) compliant controllers to 10BASE-T and/or 100BASE-TX media.

This data sheet applies to all versions of the LXT974 and LXT975 products including LXT974A, LXT974B, LXT975A, and LXT975B. As a result of product changes, Revision 4 parts are labeled LXT974B and LXT975B. Revision 3 parts are labeled LXT974A and LXT975A. The differences in these product revisions are described in the LXT974/975 Specification Update.

All four ports on the LXT974 provide a combination twisted-pair (TP) or pseudo-ECL (PECL) interface for a 0/100BASE-TX or 100BASE-FX connection.The LXT975 is pin compatible with the LXT974 except for the network ports. The LXT 975 is optimized for dual-high stacked RJ-45 modular applications and provides a twisted-pair interface on every port, but the PECL interface on only two.

The LXT974/LXT975 provides three separate LED drivers for each of the four PHY ports and a serial LED interface. In addition to standard Ethernet, each chip supports full- duplex operation at 10 Mbps and 100 Mbps. The LXT974/975 requires only a single 5V power supply. The MII may be operated independently with either a 3.3V or 5V supply.




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