In the field of semiconductor memory chips,both psram chip and sram chip are commonly used memory devices for mobile terminals and small smart devices.psram chip,also known as pseudo-SRAM,is close to the traditional SRAM in performance and has the advantages of low cost and high density,so it is the mainstream product to replace the traditional SRAM at present.
First,Similarities between psram chip and sram chip
From the application and interface level,the two chips are highly compatible.The psram chip follows the asynchronous external I/O interface of the standard sram,and it does not need to build a complex controller architecture,nor does it need complicated refresh configuration like SDRAM.The hardware adaptation method is completely consistent with the traditional SRAM chip,and it can be directly used instead,greatly reducing the cost of equipment development and revision.At the same time,both of them can meet the high-speed temporary storage requirements of mobile terminals and portable intelligent devices,and are the core storage devices for functional expansion of mobile phones,PDA and other devices.
Second,the differences between psram chip and sram chip
1.The principle of storage technology
Technical architecture is the most essential difference between the two chips.The psram chip adopts the DRAM dynamic storage architecture of 1T+1C,stores data by capacitors,and has its own automatic refresh mechanism,which can ensure data stability without external intervention.However,the traditional sram chip adopts a 6-transistor(6T)flip-flop static storage structure,which relies on the circuit to store data in a steady state,and can keep data continuously without refreshing operation.
2.Volume and storage density
Thanks to the simplified 1T+1C architecture,the cell volume of psram chip is much smaller than that of sram chip with 6T structure,and the storage density is greatly improved,which can realize high-capacity storage specifications such as 32Mbit and 64Mbit,and meet the development requirements of lightweight and miniaturization of equipment.However,sram chip has complex structure,large cell size and low storage density,so it is difficult to realize large-capacity integration.
3.Cost and application scenarios
Sram chip has complicated process and high cost.Its advantages are fast access speed and extremely low delay,and it is mainly used for ultra-high performance requirements such as CPU cache.The performance of psram chip is close to sram chip,and it has the ultimate cost advantage and higher cost performance.With the characteristics of high density and low power consumption,PS RAM chip has become the preferred memory chip for consumer mobile devices.
Ramsun is deeply involved in the semiconductor field,and is committed to the supply of semiconductor electronic components and the technical support of various storage solutions.We represent many brands with complete memory sizes and models,which can meet the specific needs of different scenarios.If you need psram chips and sram chips,please feel free to call us.
Keywords:psram chip
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