M7040N データシートの表示（PDF） - STMicroelectronics

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M7040N

64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE

STMicroelectronics 

M7040N

DESCRIPTION

Overview

ST Microelectronics, Inc.’s M7040N Search En-

gine incorporates patent-pending Associative Pro-

cessing Technology™ (APT) and is designed to

be a high-performance, pipelined, synchronous,

64K-entry network database search engine. The

M7040N database entry size can be 72 bits, 144

bits, or 288 bits. In the 72-bit entry mode, the size

of the database is 64K entries. In the 144-bit

mode, the size of the database is 32K entries, and

in the 288-bit mode, the size of the database is

16K entries. The M7040N is configurable to sup-

port multiple databases with different entry sizes.

The 36-bit entry table can be implemented using

the Global Mask Registers (GMRs) building-data-

base size of 128K entries with a single device.

Performance

The Search Engine can sustain 100 million trans-

actions per second when the database is pro-

grammed or configured as 72 or 144 bits. When

the database is programmed to have an entry size

of 36 or 288 bits, the Search Engine will perform at

50 million transactions per second. STM’s

M7040N can be used to accelerate network proto-

cols such as Longest-prefix Match (CIDR), ARP,

MPLS, and other Layer 2, 3, and 4 protocols.

Applications

This high-speed, high-capacity Search Engine can

be deployed in a variety of networking and com-

munications applications. The performance and

features of the M7040N make it attractive in appli-

cations such as Enterprise LAN switches and rout-

ers and broadband switching and/or routing

equipment supporting multiple data rates at OC–

48 and beyond. The Search Engine is designed to

be scalable in order to support network database

sizes to 3968K entries specifically for environ-

ments that require large network policy databases.

Figure 4, page 10 shows the block diagram for the

M7040N device.

Table 1. Product Range

Part Number

Operating

Supply Voltage

Operating I/O

Voltage

Speed

Temperature Range

M7040N-100ZA1

1.65V

2.5 or 3.3V

100MHz

Commercial

M7040N-083ZA1

1.5V

2.5 or 3.3V

83MHz

Commercial

M7040N-066ZA1

1.5V

2.5 or 3.3V

66MHz

Commercial

Figure 2. Switch/Router Implementation Using the M7040N

System Bus

Switch

Fabric

Network Line Interfaces

PMreomgroarmy

PrSowceitcshsor

Host

ASIC

Search

Engine

SRAM

Bank

AI04272

7/159

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