AN4011 - Choosing The Right Cypress Synchronous SRAM | Cypress Semiconductor
AN4011 - Choosing The Right Cypress Synchronous SRAM
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 |
Related Files
File Title | Language | Size | Last Updated |
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English | 663.16 KB | 05/26/2020 |
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Chinese | 723.24 KB | 08/18/2015 |
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Japanese | 814.64 KB | 08/18/2015 |
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