Apparatuses and methods for sketch circuits for refresh binning

A method comprising:

• generating an address;
• generating a plurality of hash values, by a plurality of hash circuits, based on the address, wherein each hash value of the plurality of hash values comprises a plurality of bits, wherein each of the plurality of hash circuits is configured to implement a different hash operation;
• checking selected entries in a storage structure based on the plurality of hash values;
• determining whether to provide the address as a refresh address based, in part, on values of the selected entries.

A system comprising:

• a memory device comprising a plurality of word lines
• a controller configured to perform access operations on the plurality of word lines, the controller comprising:
• an error detection circuit configured to determine if a word line of the plurality of word lines is a weak word line;
• a plurality of hash circuits each configured to generate one of a plurality of hash values based on the weak word line, wherein each hash value of the plurality of hash values comprises a plurality of bits, wherein each of the plurality of hash circuits is configured to implement a different hash operation;
• a storage structure configured to store entries indexed by the plurality of hash values;
• a refresh control circuit configured to determine a rate of refresh operations based on the entries in the storage structure.