SCM69C232

NOTES:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be restricted to RECOMMENDED OPERATING CONDITIONS. Exposure to higher than recommended voltages for extended
periods of time could affect device reliability.
2. All voltages are referenced to VSS.
3. Power dissipation capability will be dependent upon package characteristics and use environment. See Package Thermal Characteristics.
4. Consult Junction to Ambient Thermal Characteristics table for details and conditions.

The MCM69C232 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 160 ns. As a result, the MCM69C232 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 MCM69C232 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
• 160 ns Match Time
• Mask Register to "Don't Care" Selected Bits
• Depth Expansion by Cascading Multiple Devices
• 50 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
• 200 ns Insertion Time if 1 of 12 Entry Queue Locations is Empty
• 12 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