10Base-T/100Base-TX Integrated PHYceiver with RMII Interface

The ICS1894-40 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, ISO/IEC 8802.3. It is intended for RMII/MII, Node/Repeater applications and includes the Auto-MDIX feature that automatically corrects crossover errors in plant wiring. The ICS1894-40 incorporates Digital-Signal Processing (DSP) control in its Physical-Medium Dependent (PMD) sub-layer. 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 100MHz. The ICS1894-40 provides a Serial-Management Interface for exchanging command and status information with a Station-Management (STA) entity. The ICS1894-40 Media-Dependent Interface (MDI) can be configured to provide either half-duplex or full-duplex operation at data rates of 10 Mb/s or 100Mb/s. In addition, the ICS1894-40 includes a programmable LED and interrupt output function. The LED outputs can be configured through registers to indicate the occurrence of certain events such as LINK, COLLISION, ACTIVITY, etc. The purpose of the programmable interrupt output is to notify the PHY controller device immediately when a certain event happens instead of having the PHY controller continuously poll the PHY. The events that could be used to generate interrupts are: receiver error, Jabber, page received, parallel detect fault, link partner acknowledge, link status change, auto-negotiation complete, remote fault, collision, etc. The ICS1894-40 has deep power modes that can result in significant power savings when the link is broken.

• Supports category 5 cables and above with attenuation in excess of 24dB at 100 MHz.
• Single-chip, fully integrated PHY provides PCS, PMA, PMD, and AUTONEG sub layers functions of IEEE standard.
• 10Base-T and 100Base-TX IEEE 8802.3 compliant
• MIIM (MDC/MDIO) management bus for PHY register configuration
• RMII interface support with external 50 MHz system clock
• Single 3.3V power supply
• Highly configurable, supports:
  • Media Independent Interface (MII)
  • Auto-Negotiation with Parallel detection
  • Node applications, managed or unmanaged
  • 10M or 100M full and half-duplex modes
  • Loopback mode for Diagnostic Functions
• Auto-MDI/MDIX crossover correction
• Low-power CMOS (typically 300 mW)
• Power-Down mode (typically 21mW)
• Clock and crystal supported in MII mode
• Programmable LEDs
• Interrupt output pin
• Fully integrated, DSP-based PMD includes:
  • Adaptive equalization and baseline-wander correction
  • Transmit wave shaping and stream cipher
  • MLT-3 encoder and NRZ/NRZI encoder
• Core power supply (3.3 V)
• 3.3 V/1.8 V VDDIO operation supported
• Smart power control with deep power down feature
• Available in 40-pin (6mm x 6mm) QFN package, Pb-free
• Industrial Temp and Lead Free