Single Port 1G Ethernet PHY
Data Sheet


The GPY111 is an ultra-low power, multi-mode Gigabit Ethernet (GbE) PHY IC, supporting speeds of 10, 100 and 1000 Mbit/s in full-duplex or half-duplex mode. It can be used in various data flows based on twisted-pair and fiberoptic communication links. The main application is the copper mode, where Media-Independent Interface (MII) data is converted to a Media-Dependent Interface (MDI) based on the 10BASE-T(e), 100BASE-TX and 1000BASE-T Ethernet standards.
The GPY111 supports a number of features for convenience and reliability, including auto-negotiation, auto-MDIX, auto-downspeed and cable wiring fault correction. In addition, the integrated cable diagnostics mode, the test packet generator, and the various test loops can be used for analysis and debugging of the target system. The GPY111 includes an integrated serializer/deserializer (SerDes) that can be used to operate a fiber link in conjunction with a 1000BASE-X fiber module. This capability enables media converter data flow applications.


  • Twisted-pair interface:
    • 10BASE-T(e), 100BASE-TX, 1000BASE-T1)
  • Data interfaces (xMII1):
    • RMII
    • RGMII
    • SGMII /1000BASE-X SerDes at 1.25 Gbaud
    • Jumbo packets of up to 10 kB
  • Control interfaces:
    • MDIO
    • JTAG interface for boundary scan
    • Support of stand-alone operational mode using EEPROM interface (I2C)
  • Clocking:
    • Support of 25 MHz and 125 MHz input clock
    • Support of 25 MHz crystal using integrated oscillator
    • 25MHz clock output
  • Auto-negotiation with next-page support
  • Wake-on-LAN support
  • Auto-downspeed
  • Support of auto-MDIX at all copper media speeds
  • Support of auto polarity-correction at all copper media speeds
  • Various test features:
    • Test loops
    • Dummy frame generation and frame error counters
    • Analog self-test
  • Cable diagnostics:
    • Cable open/short detection
    • Cable length estimation



  • Copper Applications
  • Media Converter Applications
  • Gigabit Interface Converter (GBIC) Applications

Design Tools


Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
PEF7071VV16 -40 85 Active
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Quality & Environmental Data

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