General Description
TC35821F supports SONET STS-3c(SDH STM-1), STS-1 and STS-1/2. The following sections 1.1-1.5 review the frame format, frame overhead, error status, alarm signaling and performance monitoring.

FEATUREs
• Up to Idle/unassigned cells discarded in PHY-toATM interface, forwarded in ATM-to-PHY interface
• SONET STS-3c, STS-1, STS-1/2 and SDH STM-1
•155.52 MHz P-ECL serial network interface
• On-chip clock recovery / transmit clock synthesis
• Frame data scramble / descramble
• Frame overhead analysis / generation
• ATM cell header error correction
• ATM cell payload scramble / descramble
• UTOPIA level -1 and level-2 interface
• 19.44 MHz internal operation
• 0.6 mm CMOS technology
• 5.0 V single power supply
• 144 pin plastic quad flat package
• Operating temperature: 0 to 70ｰC

APPLICATIONs
• NIC and Switch/Router