FEATURES
The SPECTRA-622 chip offers the following features:
• Monolithic SONET/SDH Payload-Extractor/Aligner for use in STS-12 (STM-4/AU3 or STM-4/AU4) or STM-12c (STM-4/AU4-4c) interface applications that operate at serial interface speeds up to 622.08 Mbit/s.
• Provides integrated clock recovery and clock synthesis to allow a direct interface to optical modules.
• Complies with Bellcore GR-253-CORE jitter tolerance and intrinsic jitter criteria.
• Provides control circuitry required to comply with WAN clocking requirements for wander, holdover, and long term stability.
• Provides termination for SONET Section and Line, and SDH Regenerator Section and Multiplexer Section transport-overhead. Also provides termination for Path overhead of twelve STS-1 (STM-0/AU3) paths, four STS-3/ 3c (STM-1/AU3/AU4) paths, or a single STS-12c (STM-4/AU4-4c) path.
• Maps twelve STS-1 (STM-0/AU3) payloads, four STS-3/3c (STM-1/AU3/AU4) payloads, or a single STS-12c (STM-4/AU4-4c) payload to system timing references. This accommodates plesiochronous timing offsets between the references.
• Maps twelve DS3 bit-streams into an STS-12 (STM-4/AU3) frame.
• Configurable on an STS-1 basis to support a mix of traffic from the DS-3 and Telecom interfaces.
• Provides a Time-Slot Interchange (TSI) function on the Telecom Add and Drop buses for grooming twelve STS-1 (STM-0/AU3) paths or four STS-3/3c (STM-1/AU3/AU4) paths.
• Supports line loopback and diagnostic loopback.
• Supports OC-48 (STM-16) applications with byte interfaces for connection to an OC-48 front-end device.
• Supports diagnostic 223-1 pseudo-random bit-sequence (PRBS) generation and monitoring.
• Provides a standard JTAG test-port for boundary scan board-test purposes.
• Provides a generic 8-bit microprocessor bus-interface.
• Low-power 3.3V CMOS with TTL compatible inputs and CMOS/TTL digital outputs. PECL inputs and outputs are 3.3V and 5V compatible.
• Available in a 520-pin SBGA package.
• Supports industrial temperature-range (-40°C to 85°C) operation.

APPLICATIONS
Use the SPECTRA-622 chip in the following applications:
• SONET/SDH Add/Drop Multiplexers
• SONET/SDH Terminal Multiplexers
• SONET/SDH Digital Cross-Connects
• Channelized Routers and Switches