A Reliable Architecture of TCAM Search Engine Using PDM Technology

Abstract

The Ternary content-addressable memories (TCAMs) are used to design high-speed search engines. TCAM is implemented on application-specific integrated circuits and field-programmable gate array (FPGA). The TCAM selects a word among stored ternary data based on its contents. It compares the search key with the entire stored TCAM words in parallel and outputs the address of the matching word in one cycle. The existing system of TCAM search engine uses the priority encoder (PE) to select highest priority match entry for resolving the multiple match problems.