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  • Cypress (Cypress Semiconductor ) : CY 7C955

    AX SONET/SDH Transceiver

    Features include

    • WAN and LAN ATM physical layer device
    • Provides complete physical layer transport of ATM cells at
      • STS-3c/ STM-1 rate of 155.52 MHz
      • STS-1 rate of 51.84M Hz
    • Compliant with ATM Forum User Network Interface 3.1 specification
    • UTOPIA ATM interface
    • ATM cell processing including
      • HEC generation/verification
      • Cell scrambling/descrambling
      • Rate adaption/idle cell filtering
      • Local Flow Control
      • Cell alignment
    • SONET frame processing including
      • Compliant with Bellcore GR-253, I.432,
      • T1.105, and G.709
      • Frame generation/recovery
      • SONET scrambling/descrambling
      • Frequency justification/pointer processing
    • Complete line interface
      • Clock and data recovery
      • Transmit timing derived from receiver or byte-rate source
      • SONET compliant PLL
      • 100K PECL compatible I/O
    • Alarm indications including
      • Loss Of Signal
      • Out Of Frame, Loss Of Frame
      • Line Far End Receive Failure
      • Line Alarm Indication Signal
      • B1 Parity Error
      • Loss Of Cell Alignment
      • Loss Of Receive Data
    • Controller interface for internal interrupt and configuration registers
      • Error monitoring
      • Status indication
      • Device configuration

      The IC is manufactured in 0.65 m Low Power CMOS Technology.

      The part is packaged in 128 pin PQFP.

      Technology: 0.65 Low Power CMOS
      Package: PQFP 128 Pin

      external WWW: Cypress Semiconductor : web page used to be available at:

      external PDF: Cypress Semiconductor : PDF documentation used to be available at:
      If you are the producer of this chip and want to correct/update the presented information, please feel free to register for direct database access.
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