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AN4011 - Choosing The Right Cypress Synchronous SRAM | Cypress Semiconductor

AN4011 - Choosing The Right Cypress Synchronous SRAM

최신 업데이트: 
2021년 3월 02일
버전: 
*J
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:                                                                            



Parameter


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


250 MHz


250 MHz


333 MHz / 550 MHz


333 MHz / 550 MHz

Dear valued customer,

Thank you for choosing our products. They come with all the know-how and passion that our engineers have put into it. As you probably already know, Cypress is now Infineon. This is a major step for our company, but also for the good of you. 

Reliability and business continuity are of utmost importance for us. Hence, we remain fully committed to honoring existing customer and distributor relationships. This includes offering the legacy Cypress product portfolio. We thank you very much for your trusting support.

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