applications, where the preservation of data is critical and where batteries are impractical.

Pseudostatic RAM

Pseudostatic RAM (PSRAM) is DRAM combined with a self-refresh circuit. It appears externally as slower SRAM, albeit with a density and cost advantage over true SRAM, and without the access complexity of DRAM.

By transistor type

* Bipolar junction transistor (used in TTL

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