EEPROM

EEPROM is short for Electrically Erasable Programmable Read-Only Memory. It is a non-volatile memory used in devices that are required to hold small amounts of data within a circuit in a compact package. Non-volatile data is able to be erased and reprogrammed.

The read-only memory or ROM can be erased and reprogrammed through the application of electrical voltages. EEPROM chips can be modified whilst still in a computer system and their non-volatile functionality means the memory can be retrieved even after the device or computer has been turned off and back on again.

Where is EEPROM memory used?

EEPROM devices are found in computers, microcontrollers and remote keyless systems to name a few. Flash Memory is another type of EEPROM which is commonly used in applications such as USB sticks.

EEPROM Interface Types:

  • Serial EEPROM ICs use interfaces such as SPI or I2C. They often feature lower current consumption and voltage. They are also often smaller as can utilise packages with 8 pins or less.
  • Parallel EEPROM ICs offer better memory density and AC performance. It is often quicker than EEPROM but usually has a higher number of pins.

Benefits to EEPROM Memory

There are many benefits to using EEPROM memory in a computer or electronic device. The ability to erase the entire contents of an EEPROM chip as well as being able to erase single bytes per section is invaluable. As well, a variety of interfaces are available for EEPROM with both serial and parallel buses. Programming capabilities of EEPROM are easy and efficient while being programmable without removing from a device board or testing set up.


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Description Price Memory Size Interface Type Package Type Mounting Type Pin Count Organisation Minimum Operating Supply Voltage Maximum Operating Supply Voltage Programming Voltage Number of Bits per Word Dimensions Automotive Standard Data Retention Maximum Operating Temperature
RS Stock No. 394-324
Mfr. Part No.M93C66-WMN6P
TWD6.20
Each (In a Pack of 5)
units
4kbit Serial-Microwire SOIC Surface Mount 8 256 x 16 bit, 512 x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 178-5229
Mfr. Part No.93LC66B-I/SN
BrandMicrochip
TWD8.60
Each (In a Tray of 250)
units
4kbit Serial-Microwire SOIC Surface Mount 8 256 x 16 bit 2.5 V 5.5 V - - 4.9 x 3.9 x 1.25mm - 200yr +85 °C
RS Stock No. 178-5291
Mfr. Part No.93AA66BT-I/OT
BrandMicrochip
TWD7.80
Each (On a Reel of 3000)
units
4kbit Serial-Microwire SOT-23 Surface Mount 6 256 x 16 bit 1.8 V 5.5 V - - 3.1 x 1.8 x 1.3mm - 200yr +85 °C
RS Stock No. 829-6987
Mfr. Part No.M24SR64-YMN6T/2
TWD68.40
Each (In a Pack of 5)
units
64kbit Serial-I2C SOIC Surface Mount 8 - 2.7 V 5.5 V - - 5 x 4 x 1.5mm - 200yr +85 °C
RS Stock No. 454-252
Mfr. Part No.93LC66B-I/SN
BrandMicrochip
TWD9.50
Each (In a Pack of 10)
units
4kbit Serial-Microwire SOIC Surface Mount 8 256 x 16 bit 2.5 V 5.5 V - - 4.9 x 3.9 x 1.25mm - 200yr +85 °C
RS Stock No. 687-8929
Mfr. Part No.93AA66BT-I/OT
BrandMicrochip
TWD8.00
Each
units
4kbit Serial-Microwire SOT-23 Surface Mount 6 256 x 16 bit 1.8 V 5.5 V - - 3.1 x 1.8 x 1.3mm - 200yr +85 °C
RS Stock No. 808-0199
Mfr. Part No.CAT24C256WI-GT3
TWD12.60
Each (In a Pack of 50)
units
256kbit Serial-I2C SOIC Surface Mount 8 32K x 8 bit 1.8 V 5.5 V - 8bit 5 x 4 x 1.5mm - 100yr +85 °C
RS Stock No. 686-2378
Mfr. Part No.M93C66-WMN6TP
TWD5.20
Each (In a Pack of 25)
units
4kbit Serial-Microwire SOIC Surface Mount 8 256 x 16 bit, 512 x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 826-1957
Mfr. Part No.93C46B/P
BrandMicrochip
TWD15.20
Each (In a Tube of 60)
units
1kbit Serial-Microwire PDIP Through Hole 8 64 x 16 bit 4.5 V 5.5 V - 16bit 0.4 x 0.28 x 0.195in - 200yr +85 °C
RS Stock No. 686-2390
Mfr. Part No.M24C16-WMN6TP
TWD4.60
Each (In a Pack of 25)
units
16kbit Serial-I2C SOIC Surface Mount 8 2K x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 165-5723
Mfr. Part No.M24SR64-YMN6T/2
TWD29.90
Each (On a Reel of 2500)
units
64kbit Serial-I2C SOIC Surface Mount 8 - 2.7 V 5.5 V - - 5 x 4 x 1.5mm - 200yr +85 °C
RS Stock No. 168-6379
Mfr. Part No.M24C16-RMN6TP
TWD3.50
Each (On a Reel of 2500)
units
16kbit Serial-I2C SOIC Surface Mount 8 2K x 8 bit 1.8 V 5.5 V 1.8 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 168-6377
Mfr. Part No.M24C16-WMN6TP
TWD3.50
Each (On a Reel of 2500)
units
16kbit Serial-I2C SOIC Surface Mount 8 2K x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 168-5796
Mfr. Part No.M93C66-WMN6P
TWD4.90
Each (In a Tube of 100)
units
4kbit Serial-Microwire SOIC Surface Mount 8 256 x 16 bit, 512 x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 4.9 x 3.9 x 1.25mm - 40yr +85 °C
RS Stock No. 186-9820
Mfr. Part No.CAT25256YI-G
TWD33.30
Each (In a Pack of 10)
units
256kbit - TSSOP Surface Mount 8 32k x 8 bit 1.8 V 5.5 V - 8bit 3.1 x 4.5 x 1.05mm AEC-Q100 100yr +85 °C
RS Stock No. 823-0805
Mfr. Part No.24LC16B-E/P
BrandMicrochip
TWD14.90
Each (In a Pack of 20)
units
16kbit Serial-I2C PDIP Through Hole 8 256 x 8 2.5 V 5.5 V 2.5 → 5.5V 8bit 0.4 x 0.28 x 0.195in - >200yr +125 °C
RS Stock No. 687-9073
Mfr. Part No.24LC256-I/SM
BrandMicrochip
TWD30.00
Each
units
256kbit Serial-I2C SOIJ Surface Mount 8 32K x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 5.33 x 5.38 x 1.98mm - 200yr +85 °C
RS Stock No. 454-090
Mfr. Part No.24LC02BT-I/OT
BrandMicrochip
TWD6.90
Each (On a Reel of 500)
units
2kbit Serial-I2C SOT-23 Surface Mount 5 256 x 8 bit 2.5 V 5.5 V 2.5 → 5.5V - 3.1 x 1.8 x 1.3mm - 200yr +85 °C
RS Stock No. 911-5577
Mfr. Part No.25LC640A-I/SN
BrandMicrochip
TWD19.00
Each (In a Tube of 100)
units
64kbit Serial-SPI SOIC Surface Mount 8 8K x 8 bit 2.5 V 5.5 V - - 4.9 x 3.9 x 1.25mm - 200yr +85 °C
RS Stock No. 178-4034
Mfr. Part No.24AA512-I/ST
BrandMicrochip
TWD46.80
Each (In a Tube of 100)
units
512kbit Serial-I2C TSSOP Surface Mount 8 64K x 8 bit 1.7 V 5.5 V 2.5 V, 3.3 V, 5 V 8bit 3.1 x 4.5 x 1.05mm - >200yr +85 °C