DESCRIPTION
The PM5349 S/UNI-QUAD SATURN User Network Interface is a monolithic integrated circuit that implements four channel SONET/SDH processing and ATM mapping functions at the STS-3c (STM-1) 155.52 Mbit/s rate.

FEATURES
General
• Single chip QUAD ATM User-Network Interface operating at 155.52 Mbit/s.
• Implements the ATM Forum User Network Interface Specification and the ATM physical layer for Broadband ISDN according to CCITT Recommendation I.432.
• Processes duplex 155.52 Mbit/s STS-3c (STM-1) data streams with on-chip clock and data recovery and clock synthesis.
• Exceeds Bellcore GR-253-CORE jitter tolerance and intrinsic jitter criteria.
• Fully implements the ATM Forum’s Utopia Level 2 Specification with MultiPHY addressing and parity support.
• Provides a standard 5 signal IEEE 1149.1 JTAG test port for boundary scan board test purposes.
• Provides a generic 8-bit microprocessor bus interface for configuration, control, and status monitoring.
• Low power 3.3V CMOS with PECL and TTL compatible inputs and CMOS/TTL outputs, with 5V tolerance inputs (system side interface is 3.3V only).
• Industrial temperature range (-40°C to +85°C).
• 304 pin Super BGA package.

APPLICATIONS
• LAN switches and hubs.
• Layer 3 switches.
• Multiservice switches (FR, ATM, IP, etc..).
• Gibabit and terabit routers.