Product Introduction

CTC21101 is a single-port, highly integrated Ethernet transceiver (PHY) that supports 10/100/1000 Mbps rates. The chip provides physical layer functions for half/full-duplex 10BASE-Te, 100BASE-Tx and 1000BASE-T Ethernet in accordance with the IEEE 802.3 standard, transmitting and receiving Ethernet data over standard CAT.5E UTP cables.

Based on advanced DSP technology and analog front-end (AFE) technology, the chip integrates cross-detection and automatic correction, polarity correction, adaptive equalization, crosstalk cancellation, echo cancellation, timing recovery and error correction to provide powerful 10Mbps, 100Mbps or 1000Mbps data sending and receiving capabilities.

CTC21101 supports MAC and PHY connections via the Thin Gigabit Media Standalone Interface (RGMII) or Serial Gigabit Media Standalone Interface (SGMII) for 1000BASE-T, 100BASE-TX and 10BASE-Te data transfer. The chip supports 3.3V, 2.5V and 1.8V RGMII I/O voltages.

The chip integrates a SerDes interface, which can be configured in SGMII, 1000BASE-X or 100BASE-FX mode. At the same time, it supports the MDI pin extension range protocol and provides X-Range 100M mode ultra-long-distance transmission, which requires the link partner to also support the X-Range 100M 4-pair function, and extends the support of CAT.5e cable transmission up to 400 meters at 100Mbps rate.

Figure 1: CTC21101 (Mars 1S) PHY

The chip can be flexibly configured to work in different modes:

• RGMII/SGMII+Copper mode

• RGMII+Fiber mode

• RGMII+Copper/Fiber/SGMII automatic media detection mode

• SGMII+RGMII (SGMII and RGMII conversion mode)

• Fiber+UTP mode

Target Applications:

• Ethernet switches

• Ethernet hubs

• Base stations and controllers

• Routers, DSLAM, PON devices

• Multimedia synchronization and real-time networking

Product Features:

• Following the 1000BASE-T IEEE 802.3ab standard

• Following the 100BASE-TX IEEE 802.3u standard

• Following the 10BASE-TE IEEE 802.3 standard

• Support 1000BASE-X, 100BASE-FX

• Support X-Range ultra-long-distance transmission mode

– 4 pairs of CAT.5E cables at 100M rate, supporting extended transmission up to 400m

– Support RGMII/SGMII MAC interfaces

• Supports IEEE 802.3az-2010 (Energy Efficient Ethernet)

– Support EEE Buffer

– Compatible with legacy MAC or non-EEE-aware link-layer devices

• Synchronous Ethernet (SyncE) support

• Fiber supports Wake on LAN (ROLE) for UTP/Fiber cables

• Support UTP/Fiber interrupt function

• Supports parallel detection

• Cross-detection and auto-correction

• Supports automatic polarity correction

• Supports baseline drift correction

• 1000BASE-T supports CAT. 5E cable 120m transmission

• RGMII I/O supports 3.3/2.5/1.8V voltage

• Support 25MHz external crystal oscillator or OSC

• Supports 125MHz clock source used by MAC

• Provides 3 network status indicators

• Support Link Down for energy saving

• Built-in switching regulator and LDO

• Support SERDES (SGMII/1000BASE-X)

• Supports fiber-to-UTP media conversion mode or SGMII-to-RGMII bridging mode

• Support UTP/fiber auto-detection

• Supports jumbo frame transmission up to 13K at Gigabit and 100 Gigabit speeds, and up to 10K at 10 Gigabit rates

• 48-pin QFN green package

Application examples