37942

· 32K DATA ENTRIES IN 68-BIT MODE
· TABLE MAY BE PARTITIONED INTO UP TO FOUR (4) QUADRANTS (Data entry width in each octant is configurable as 34, 68, 136, or 272 bits.)
· UP TO 83 MILLION SUSTAINED SEARCHES PER SECOND IN 68-BIT and 136-BIT CONFIGURATIONS
· UP TO 41.5 MILLION SEARCHES PER SECOND IN 34-BIT and 272-BIT CONFIGURATIONS
· SEARCHES ANY SUB-FIELD IN A SINGLE CYCLE
· OFFERS BIT-BY-BIT and GLOBAL MASKING
· SYNCHRONOUS, PIPELINED OPERATION
· UP TO 31 SEARCH ENGINES CASCADABLE WITHOUT PERFORMANCE DEGRADATION
· WHEN CASCADED, THE DATABASE ENTRIES CAN SCALE FROM 248K TO 1984K DEPENDING ON THE WIDTH OF THE ENTRY
· GLUELESS INTERFACE TO INDUSTRYSTANDARD SRAMS
· SIMPLE HARDWARE INSTRUCTION INTERFACE
· IEEE 1149.1 TEST ACCESS PORT
· OPERATING SUPPLY VOLTAGES INCLUDE:
VDD (Operating Supply Voltage) = 1.8V
VDDQ (Operating Supply Voltage for I/O) = 2.5 or 3.3V
· 272 PBGA, 27mm x 27mm

This high-speed, high-capacity Search Engine can be deployed in a variety of networking and communications applications. The performance and features of the M7020R make it attractive in applications such as Enterprise LAN switches and routers and broadband switching and/or routing equipment supporting multiple data rates at OC48 and beyond. The Search Engine is designed to be scalable in order to support network database sizes to 1984K entries specifically for environments that require large network policy databases.

Figure 4, page 5 shows the block diagram for the M7020R device.

ST Microelectronics, Inc.'s 37942 Search Engine incorporates patent-pending Associative Processing Technology™ (APT) and is designed to be a high-performance, pipelined, synchronous,32K-entry network database search engine. The M7020R database entry size can be 68 bits, 136 bits, or 272 bits. In the 68-bit entry mode, the size of the database is 32K entries. In the 136-bit mode, the size of the database is 16K entries, and in the 272-bit mode, the size of the database is 8K entries. The 37942 is configurable to support multiple databases with different entry sizes. The 34-bit entry table can be implemented using the Global Mask Registers (GMRs) building-database size of 64K entries with a single device.