Integrated Circuit Systems, Inc.
Document Type: Brief
ICS1893 Brief
Document Stage: Release
3.3-V 10Base-T/100Base-TX Integrated PHYceiver
General
Features
The ICS1893 is a low-power, physical-layer device (PHY)
that supports the ISO/IEC 10Base-T and 100Base-TX
Carrier-Sense Multiple Access/Collision Detection
(CSMA/CD) Ethernet standards. The ICS1893 architecture
is based on the ICS1892. The ICS1893 supports managed or
unmanaged node, repeater, and switch applications.
• Supports category 5 cables with attenuation in excess of
24 dB at 100 MHz across a temperature range from -5° to
+85° C
• DSP-based baseline wander correction to virtually
eliminate killer packets across temperature range of from
-5° to +85° C
• Low-power, 0.35-micron CMOS (typically 400 mW)
• Single 3.3-V power supply.
• Single-chip, fully integrated PHY provides PCS, PMA,
PMD, and AUTONEG sublayers of IEEE standard
The ICS1893 incorporates digital signal processing (DSP)
in its Physical Medium Dependent (PMD) sublayer. As a
result, it can transmit and receive data on unshielded
twisted-pair (UTP) category 5 cables with attenuation in
excess of 24 dB at 100 MHz. With this ICS-patented
technology, the ICS1893 can virtually eliminate errors from
killer packets.
• 10Base-T and 100Base-TX IEEE 802.3 compliant
• Fully integrated, DSP-based PMD includes:
– Adaptive equalization and baseline wander correction
– Transmit wave shaping and stream cipher scrambler
– MLT-3 encoder and NRZ/NRZI encoder
The ICS1893 provides a Serial Management Interface for
exchanging command and status information with a Station
Management (STA) entity.
• Highly configurable design supports:
– Node, repeater, and switch applications
– Managed and unmanaged applications
– 10M or 100M half- and full-duplex modes
– Parallel detection
The ICS1893 Media Dependent Interface (MDI) can be
configured to provide either half- or full-duplex operation at
data rates of 10 MHz or 100 MHz. The MDI configuration
can be established manually (with input pins or control
register settings) or automatically (using the
Auto-Negotiation features). When the ICS1893
Auto-Negotiation sublayer is enabled, it exchanges
technology capability data with its remote link partner and
automatically selects the highest-performance operating
mode they have in common.
– Auto-negotiation, with Next Page capabilities
• MAC/Repeater Interface can be configured as:
– 10M or 100M Media Independent Interface
– 100M Symbol Interface (bypasses the PCS)
– 10M 7-wire Serial Interface
• Small Footprint 64-pin Thin Quad Flat Pack (TQFP)
ICS1893 Block Diagram
100Base-T
PCS
PMA
TP_PMD
•
•
Frame
CRS/COL
Detection
Parallel to Serial
4B/5B
•
•
•
•
Clock Recovery
Link Monitor
Signal Detection
Error Detection
•
•
•
•
MLT-3
10/100 MII or
Alternate
MAC/Repeater
Interface
Twisted-
Pair
Interface to
Magnetics
Modules and
RJ45
Interface
MUX
Integrated
Switch
Stream Cipher
Adaptive Equalizer
Baseline Wander
Correction
•
•
10Base-T
Connector
MII
Low-Jitter
Clock
Synthesizer
Auto-
Negotiation
Configuration
and Status
Extended
Register
Set
MII Serial
Management
Interface
Clock
Power
LEDs and PHY
Address
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.
1893Brief Rev B 9/10/99
September, 1999
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
