- MemoryLink Product Selection Tool
- Serial EERAM
- Serial EEPROM
- Serial & Parallel Flash
- Serial SRAM & Serial NVSRAM
- Parallel EEPROM
- OTP EPROM
Serial SRAM is a standalone volatile memory that offers designers an easy and inexpensive way to add more RAM to their application. These 8-pin low power, high performance SRAM devices have unlimited endurance and zero write times, making them ideal for applications involving continuous data transfer, buffering, data logging, audio, video, internet, graphics, and other math and data-intensive functions. These devices are available from 64 Kbit up to 1 Mbit in density and support SPI, SDI and SQI™ bus modes.
Serial NVSRAM offers non-volatile RAM storage and is ideal for applications that need to write very often to the memory. This device is significantly lower cost than other non-volatile RAM devices and the data is backed using an external battery. This 8-pin, SPI device supports unlimited instantaneous writes to the memory array, making it ideal in applications such as meters, data loggers, data recorders, black boxes. These devices are available in 512 Kbits and 1 Mbit densities.
RAM Expansion Options:
There have traditionally been two ways to increase an application’s RAM:
- Use a larger microcontroller. This option is less attractive if you must buy a larger, more expensive micro just to get more RAM.
- Use external parallel RAM. But, parallel RAM uses large packages and typically requires at least 16-20 I/Os.
Memory Product Comparison
|Clock Frequency||0.4 - 20 MHz||70 ns||45 ns||20 - 104 MHz||45 - 70 ns||16 - 20 MHz||16 - 20 MHz||1 MHz|
|Pin Count||8 pins||28 and 32 pins||28+ pins||8 pins||32 and 48 pins||8 pins||8 pins||8 pins|
|Data Retention||200+ Years||10|
|100+ Years||100+ Years||Volatile||20+ Years(with battery)||200+ Years|
|Typ. Standby Current||1 µA||200 µA||100 µA||~15 µA||~30 µA||~4 µA||~4 µA||~40 µA|
|Voltage||1.7 V - 5.5V||2.7V, 5V||2.7V, 5V||1.65V - 1.95V, 2.7V - 3.6V, 2.3V - 3.6V||1.65V - 1.95V, 2.7V - 3.6V, 4.5V - 5.5V||1.65V - 1.95V, 2.5V - 5.5V||2.5V - 5.5V||2.7V - 3.6V, 4.5V - 5.5V|
|Temperature||-40°C to +125°C||-55°C to +125°C||-55°C to +125°C||-40°C to +105°C||-40°C to +85°C||-40°C to +85°C||-40°C to +85°C||-40°C to +85°C|