MCM69C233

The MCM69C233 is a flexible contentaddressable memory (CAM) that can contain 4096 entries of 64 bits each. The widths of the match field and the output field are programmable, and the match time is designed to be 210 ns. As a result, the MCM69C233 is well suited for datacom applications such as Virtual Path Identifier/Virtual Circuit Identifier (VPI/VCI) translation in ATM switches up to OC12 (622 Mbps) data rates and Media Access Control (MAC) address lookup in Ethernet/Fast Ethernet bridges. The match duty cycle of the MCM69C233 is user defined, with a tradeoff between the time between the match request rate and the rate of new entries added to the CAM.
• 4096 Entries
• 210 ns Match Time
• Mask Register to "Don't Care" Selected Bits
• Depth Expansion by Cascading Multiple Devices
• 66 MHz Maximum Clock Rate
• Programmable Match and Output Field Widths
• Concurrent Matching of Virtual Path Circuits and Virtual Connection Circuits in ATM Mode
• Separate Ports for Control and Match Operations
• 300 ns Insertion Time if 1 of 12 Entry Queue Locations is Empty
• 18 ms Initialization Time After Fast Insertion (at PowerUp Only)
• Single 3.3 V ±5% Supply
• IEEE Standard 1149.1 Test Port (JTAG)
• 100Pin TQFP Package