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AN4011 - Choosing The Right Cypress Synchronous SRAM | サイプレス セミコンダクタ

AN4011 - Choosing The Right Cypress Synchronous SRAM

最終更新日: 
2020 年 5 月 28 日
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AN4011 provides an overview of Standard Synchronous, NoBL¿, QDR®-II/II+, QDR-II+ Xtreme, DDR-II/II+, DDR-II+ Xtreme and QDR-IV SRAM's. Cypress currently manufactures several major Synchronous SRAM architectures. The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

AN4011 provides an overview of Standard Synchronous, NoBL, QDR®-II/II+, QDR-II+ Xtreme, DDR-II/II+, DDR-II+ Xtreme and QDR-IV SRAM's. Cypress currently manufactures several major Synchronous SRAM architectures. The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

The table below shows the architecture comparison for the different options:                                                                            



パラメータ


Std. Sync


NoBLTM


DDR-II/DDR-II+


QDRTM-II/ QDRTM-II+


Data Rate


Single


Single


Double


Double


Data Bus


Common I/O


Common I/O


Common and Separate I/O


Separate I/O


VDD


3.3V/2.5V


3.3V/2.5V


1.8V


1.8V


VDDQ


LVTTL 3.3V/2.5V


LVTTL 3.3V/3.5V


HSTL (1.5V/1.8V)


HSTL (1.5V/1.8V)


Clock Frequency


250MHz


250MHz


333 MHz / 550 MHz


333 MHz / 550 MHz
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