IDT77155

• One chip ATM User Network Interface for 155.52 Mbps/ 51.84Mbps operating speed.
• Full implementation of the SONET/SDH criteria according to Bellcore GR-253-CORE and ITU-T G.709, G.783.
• Full implementation of the ATM physical layer according to CCITT I.432 and ATM Forum User Network Interface Specification.
• Full-duplex 155.52 Mbps STS-3c/STM-1 or 51.84 Mbps STS-1 data with built-in clock/data recovery and clock synthesis.
• Supports 4-cell PHY FIFO buffers for both transmit and receive directions with parity.
• Provides GFC bits insertion and extraction.
• UTOPIA Level 1 and Level 2 Interface.
• Supports up to 4 PHYs for Multi-PHY connections with 2- bit address and 8-bit data using UTOPIA 2 protocol.
• Provides an 8-bit microprocessor bus interface for configuration, control and monitoring.
• Low power CMOS
• 128 pin PQFP Package (14 mm x 20 mm).

The IDT77155 is a member of IDT's SWITCHStAR™ family of products for Asynchronous Transfer Mode (ATM) networks.

The IDT77155 is a integrated circuit that provides the SONET/SDH processing and ATM mapping functions of a 155 Mbps/51 Mbps ATM User Network Interface. Provides full compliance with SONET/SDH requirements and ATM Forum User Network Interface specifications.

The IDT77155 provides both Transmission Convergence (TC) and Physical Media Dependent (PMD) sublayer functions of a 155.52 Mbps/51.84 Mbps ATM PHY suitable for ATM networks. The SONET/SDH interface provides the SONET/SDH overheads demultiplex and multiplex processing functions. The UTOPIA interface provides standardized control and communications to other components, such as Segmentation and Reassembly (SAR) controllers and ATM switches.

The IDT77155 is fabricated using state-of-the-art CMOS technology, providing the highest levels of integration, performance and reliability, with the low-power consumption characteristics of CMOS.