Memory device and memory system including the same

A memory device comprising:

• a temperature sensor suitable for generating temperature information;
• a normal refresh circuit suitable for generating an internal refresh signal in response to a refresh command while selectively receiving the refresh command at a specific ratio based on the temperature information when an internal temperature control refresh mode is set;
• and
• a smart refresh circuit suitable for activating a smart refresh signal when the internal refresh signal is activated a set number of times, and controlling the set number based on the temperature information when any of the internal temperature control refresh mode and an external temperature control refresh mode are set,
• wherein the smart refresh circuit increases the set number when the temperature information indicates a higher temperature, and decreases the set number when the temperature information indicates a lower temperature.

A memory system comprising:

• a memory controller suitable for applying a refresh command to a memory device;
• and
• the memory device includes:
• a temperature sensor suitable for generating temperature information;
• a normal refresh circuit suitable for activating an internal refresh signal for executing a normal refresh operation when the refresh command is applied, while selectively receiving the refresh command at a specific ratio based on the temperature information;
• and
• a smart refresh circuit suitable for activating a smart refresh signal for executing a smart refresh operation when the internal refresh signal is applied a set number of times,
• wherein the smart refresh circuit activates the smart refresh signal when the internal refresh signal is activated the set number of times, and the smart refresh circuit increases the set number when the temperature information indicates a higher temperature, and decreases the set number when the temperature information indicates a lower temperature.

A memory system comprising:

• a memory device suitable for providing temperature information;
• and
• a memory controller suitable for controlling a period in which a refresh command is applied to the memory device in response to the temperature information,
• wherein the memory device comprises:
• a temperature sensor suitable for generating the temperature information;
• a transmission unit suitable for transferring the temperature information to the memory controller;
• a normal refresh circuit suitable for activating an internal refresh signal for executing a normal refresh operation when the refresh command is applied;
• and
• a smart refresh circuit suitable for activating a smart refresh signal for executing a smart refresh operation when the internal refresh signal is applied a set number of times, and controlling the set number based on the temperature information,
• wherein the smart refresh circuit increases the set number when the temperature information indicates a higher temperature, and decreases the set number when the temperature information indicates a lower temperature.