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:	0.65µ Low Power CMOS
  Package:	PQFP 128 Pin

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  web page used to be available at: http://www.cypress.com/products/datasheet.cfm?partnum=CY7C955-NC

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  PDF documentation used to be available at: http://www.cypress.com/pub/datasheets/cy7c955.pdf

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