NVRAM

NVRAM (Non –Volatile Random-Access Memory ) is a memory chip that stores data within an electronic circuit. NVRAM is able to store data even when the power is turned off. This is unlike RAM and DRAM which lose memory when there is no power. 

NVRAM memory is ideal for circuits that require a quick start up time as they are quick at reading and writing. However, they are not always suitable for main memory usage, due to limited memory sizes and power consumption. NVRAM is battery-back which, at some point, will need replacing.

These devices come in a semiconductor package. Package types include SIPP (single inline pin package), DIP (dual inline package), CERDIP (ceramic dual inline package) and PDIP (plastic inline package)

Types of NVRAM:

  • RTC/NVRAM are also known as CMOS chips. They combine NVRAM with a real-time clock (RTC). The clock is there to read the date and time, which is stored by the NVRAM. RTC/NVRAM chips are designed for lower power consumption. 
  • EEPROM stands for electrically erasable programmable read-only memory. It is a type of non-volatile memory which stores data that can be deleted and reprogrammed. 
  • FRAM stands for ferroelectric RAM. It uses a ferroelectric later for non-volatility. 
  • MRAM is magnetoresistive RAM. It stores its data within magnetic domains. 

Where is NVRAM used?

NVRAM memory is used in any device that requires settings to be stored, such as the date and time. This includes:

  • Cameras
  • Computer Monitors
  • Smart Cards
  • Tablets
  • Smartphones
  • USB drives

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Description Price Memory Size Organisation Interface Type Data Bus Width Maximum Random Access Time Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature
RS Stock No. 194-9081
Mfr. Part No.CY14B104NA-ZSP45XI
TWD691.70
Each (In a Tray of 108)
units
4Mbit 256K x 16 bit Parallel 16bit 45ns Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 22.51mm 10.26mm 1.05mm 3.6 V +85 °C
RS Stock No. 182-0110
Mfr. Part No.CY14B101LA-SZ25XI
TWD906.50
Each (In a Tube of 22)
units
1Mbit 128K x 8 bit - 8bit 25ns Surface Mount SOIC 32 20.87 x 7.59 x 2.29mm 20.87mm 7.59mm 2.29mm 3.6 V +85 °C
RS Stock No. 146-1108
Mfr. Part No.DS1230AB-120+
TWD747.30
Each (In a Tube of 12)
units
256kbit 32K x 8 bit Parallel 8bit 120ns Through Hole EDIP 28 39.12 x 18.8 x 9.4mm 39.12mm 18.8mm 9.4mm 5.25 V +70 °C
RS Stock No. 189-7459
Mfr. Part No.DS1225AD-150+
TWD531.00
Each (In a Tube of 12)
units
64kbit 8K x 8 bit Parallel 8bit 150ns Through Hole EDIP 28 39.12 x 18.29 x 9.4mm 39.12mm 18.29mm 9.4mm 5.5 V +70 °C
RS Stock No. 136-667
Mfr. Part No.DS1243Y-120+
TWD812.00
Each
units
- - Parallel - 120ns Through Hole EDIP 28 39.37 x 18.29 x 10.67mm 39.37mm 18.29mm 10.67mm 5.5 V +70 °C
RS Stock No. 103-1428
Mfr. Part No.M48Z02-70PC1
TWD236.70
Each (In a Tube of 14)
units
16kbit 2K x 8 bit Parallel 8bit 70ns Through Hole PCDIP 24 34.8 x 18.34 x 8.89mm 34.8mm 18.34mm 8.89mm 5.5 V +70 °C
RS Stock No. 194-9074
Mfr. Part No.CY14B104LA-ZS45XI
TWD894.00
Each
units
4Mbit 512K x 8 bit Parallel 8bit 45ns Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 18.51mm 10.26mm 1.04mm 3.6 V +85 °C
RS Stock No. 192-1211
Mfr. Part No.DS1220AB-200+
TWD423.90
Each (In a Tube of 14)
units
16kbit 2K x 8 bit Parallel 8bit 200ns Through Hole EDIP 24 34.04 x 18.29 x 9.4mm 34.04mm 18.29mm 9.4mm 5.25 V +70 °C
RS Stock No. 659-797
Mfr. Part No.GR12883
TWD1,564.00
Each
units
1Mbit 128K x 8 bit Parallel 8bit 100ns Through Hole PDIP 32 43.5 x 18 x 13mm 43.5mm 18mm 13mm 5.5 V +70 °C
RS Stock No. 194-9064
Mfr. Part No.CY14B101LA-SP45XI
TWD896.00
Each
units
1Mbit 128K x 8 bit Parallel 8bit 45ns Surface Mount SSOP 48 0.63 x 0.29 x 0.09in 16mm 7.37mm 2.29mm 3.6 V +85 °C
RS Stock No. 146-1106
Mfr. Part No.DS1230AB-70+
TWD696.70
Each (In a Tube of 12)
units
256kbit 32K x 8 bit Parallel 8bit 70ns Through Hole EDIP 28 39.12 x 18.8 x 9.4mm 39.12mm 18.8mm 9.4mm 5.25 V +70 °C