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. 189-7497
Mfr. Part No.DS1992L-F5+
SGD18.49
Each
units
1kbit 4 Pages x 256 bit 1-Wire - - - F5 MicroCan 2 17.35 x 17.35 x 5.89mm 17.35mm 17.35mm 5.89mm - +70 °C
RS Stock No. 146-1110
Mfr. Part No.DS1245Y-70+
SGD46.065
Each (In a Tube of 11)
units
1Mbit 128K x 8 bit Parallel 8bit 70ns Through Hole EDIP 32 44.19 x 18.8 x 10.92mm 44.19mm 18.8mm 10.92mm 5.5 V +70 °C
RS Stock No. 191-5735
Mfr. Part No.DS1225AD-70IND+
SGD28.38
Each
units
64kbit 8K x 8 - - 70ns Through Hole EDIP 28 39.37 x 18.29 x 10.67mm 39.37mm 18.29mm 10.67mm 5.5 V +85 °C
RS Stock No. 168-6483
Mfr. Part No.M48T35AV-10PC1
SGD32.19
Each (In a Tube of 12)
units
256kbit 32K x 8 bit Parallel 8bit 100ns Through Hole PCDIP 28 39.98 x 18.34 x 8.89mm 39.88mm 18.34mm 8.89mm 3.6 V +70 °C
RS Stock No. 194-9072
Mfr. Part No.CY14B104LA-ZS25XI
SGD50.44
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. 192-1528
Mfr. Part No.DS1744-70+
SGD44.19
Each
units
- - - - - Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 39.37mm 18.8mm 10.67mm 0.8 V, 5.3 V +70 °C
RS Stock No. 194-9096
Mfr. Part No.CY14V101QS-SF108XI
SGD20.54
Each
units
1Mbit 128K x 8 bit - 8bit - Surface Mount SOIC 16 10.49 x 7.59 x 2.36mm 10.49mm 7.59mm 2.36mm 3.6 V +85 °C
RS Stock No. 181-8328
Mfr. Part No.CY14B101Q2-LHXI
SGD18.35
Each
units
1Mbit 128K x 8 bit Serial-SPI - - Surface Mount DFN 8 6 x 5 x 0.73mm 6mm 5mm 0.73mm 3.6 V +85 °C
RS Stock No. 172-2333
Mfr. Part No.GR12883
SGD91.161
Each (In a Box of 20)
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. 194-9079
Mfr. Part No.CY14B104NA-ZS45XI
SGD35.986
Each (In a Tray of 135)
units
4Mbit 256K x 16 bit Parallel 16bit 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. 194-9071
Mfr. Part No.CY14B104LA-ZS25XI
SGD40.648
Each (In a Tray of 135)
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. 169-8242
Mfr. Part No.DS1230AB-100+
SGD30.50
Each (In a Tube of 12)
units
256kbit 32K x 8 bit Parallel 8bit 100ns 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. 194-9076
Mfr. Part No.CY14B104NA-BA25XI
SGD50.44
Each
units
4Mbit 256K x 16 bit Parallel 16bit 45ns Surface Mount FBGA 48 10 x 6 x 0.21mm 10mm 6mm 0.21mm 3.6 V +85 °C
RS Stock No. 165-9391
Mfr. Part No.DS1744-70+
SGD39.783
Each (In a Tube of 12)
units
- - - - - - - - - - - - - -
RS Stock No. 189-9200
Mfr. Part No.DS1225AD-150+
SGD27.90
Each
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. 194-9064
Mfr. Part No.CY14B101LA-SP45XI
SGD40.51
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. 194-9068
Mfr. Part No.CY14B101NA-ZS45XI
SGD40.51
Each
units
1Mbit 64K x 16 bit Parallel 16bit 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. 189-7458
Mfr. Part No.DS1220AD-200+
SGD17.819
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 5.5 V +70 °C
RS Stock No. 194-9073
Mfr. Part No.CY14B104LA-ZS45XI
SGD34.911
Each (In a Tray of 135)
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. 189-7460
Mfr. Part No.DS1230Y-100+
SGD34.67
Each (In a Tube of 12)
units
256kbit 32K x 8 bit - - 100ns Through Hole EDIP 28 39.37 x 18.8 x 9.35mm 39.37mm 18.8mm 9.35mm 5.5 V +85 °C
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