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Serial SRAM and Serial NVSRAM

Find the right serial SRAM for you:

Serial SRAM Family
64 Kbit256 Kbit512 Kbit1 Mbit 
23x64023x25623xx51223xx1024

 

Serial NVSRAM Family
512 Kbit1 Mbit
23LCV51223LCV1024

 

Serial SRAM

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

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.

SERIALRAMDIAGRAM

RAM Expansion Options:

There have traditionally been two ways to increase an application’s RAM:

  1. Use a larger microcontroller. This option is less attractive if you must buy a larger, more expensive micro just to get more RAM.
  2. Use external parallel RAM. But, parallel RAM uses large packages and typically requires at least 16-20 I/Os.
SERIALRAMARROW
Serial SRAM now offers the flexibility to add RAM to a design without the disadvantages of a large micro or parallel RAM and uses the simple 4-pin SPI interface. These devices also offer improved performance with the SDI and SQI interface that offers up to a 4x improvement in data rates.

Web Seminars

Learn all about our serial SRAM products in only 20 minutes with a webseminar:

SRAM Brochures

Serial EEPROM Brochures:

SRAM Application Notes

Need reference code to help interface with our serial SRAM products?
SRAM Application Notes – PIC® MCUs

Memory Product Comparison

 Serial
EEPROM
Parallel
EEPROM
OTP
EPROM
Serial
Flash
Parallel
Flash
Serial
SRAM
Serial
NVSRAM
Serial
EERAM
Clock Frequency0.4 - 20 MHz70 ns45 ns20 - 104 MHz45 - 70 ns16 - 20 MHz16 - 20 MHz1 MHz
Cost/BitHighHighHighLowLowMediumMediumLow
Read TimesMediumFastFastMediumFastMediumMediumMedium
Write TimesMediumFastNAMediumFastInstantaneousInstantaneousInstantaneous
Pin Count8 pins28 and 32 pins28+ pins8 pins32 and 48 pins8 pins8 pins8 pins
Data Retention200+ Years10
Years
10
Years
100+ Years100+ YearsVolatile20+ Years(with battery)200+ Years
Typ. Standby Current1 µA200 µA100 µA~15 µA~30 µA~4 µA~4 µA~40 µA
Voltage1.7 V - 5.5V2.7V, 5V2.7V, 5V1.65V - 1.95V, 2.7V - 3.6V, 2.3V - 3.6V1.65V - 1.95V, 2.7V - 3.6V, 4.5V - 5.5V1.65V - 1.95V, 2.5V - 5.5V2.5V - 5.5V2.7V - 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