ICS1890
Integrated
Circuit
Systems, Inc.
10Base-T/100Base-TX Integrated PHYceiver
General Description
The ICS1890 is a fully integrated physical layer device
supporting 10 and 100Mb/s CSMA/CD Ethernet applications.
DTE (adapter cards or motherboards), switching hub, repeater
and router applications are fully supported. The ICS1890
is compliant with the ISO/IEC 8802-3 Ethernet standard
for 10 and 100Mb/s operation. A Media Independent Interface
allowing direct chip-to-chip connection, motherboard-todaughterboard connection or connection via an AUI-like
cable is provided. A station management interface is
provided to enable command information and status
information exchange. The ICS1890 interfaces directly to
transmit and receive isolation transformers and can support
shielded twisted pair (STP) and unshielded twisted pair
(UTP) category 5 cables up to 105 meters. Operation in half
duplex or full duplex modes at either 10 or 100 Mbps
speeds is possible with control by Auto-Negotiation or
manual selection. By employing Auto-Negotiation the
technology capabilities of the remote link partner may be
determined and operation automatically adjusted to the
highest performance common operating mode.
Features
One chip integrated physical layer
All CMOS, Low power design (<200mA max)
Small footprint 64-pin 14mm
ISO/IEC 8802-3 CSMA/CD compliant
Media Independent Interface (MII)
Alternate 100M stream and 10M 7-wire serial
interfaces provided
10Base-TX Half & Full Duplex
100Base-TX Half & Full Duplex
Fully integrated TP-PMD including Stream
Cipher Scrambler, MLT-3 encoder, Adaptive
Equalization, and Baseline Wander Correction
Circuitry
2
QFP package
Block Diagram
PHYceiver and QuickPoll are trademarks of Integrated
Circuit Systems, Inc. Patents pending.
ICS1890RevG 10/21/97
ICS reserves the right to make changes in the device data identified in this publication
without further notice. ICS advises its customers to obtain the latest version of all
device data to verify that any information being relied upon by the customer is current
and accurate.
