24LC1026 Serial EEPROM

The 24LC1026 is a 128Kx8 (1024K bit) Serial Electrically Erasable PROM, capable of operation across a broad voltage range (1.7V to 5.5V). It has been developed for advanced, low-power applications such as personal communications or data acquisition. This device has both byte write and page write capability of up to 128 bytes of data.

Pin Description of 24LC1026:

Specifications of 24LC1026

• Maximum Clock Frequency: 400 kHz
• 128-Byte Page Write Buffer
• Page Write Time 5mS Max.
• Read current 450 uA, max.
• Standby current 5 uA, max.
• Supply Current - Max: 5 mA
• Supply Voltage - Min: 2.5V
• Supply Voltage - Max: 5.5 V
• Operating voltage: 2.5V to 5.5V
• Organisation:128 k x 8
• Communication: Serial, 2-Wire, I2C
• Write cycle time: 5ms
• 16-byte Page (4K) Write Modes
• Available in 8-lead PDIP, SOIC Packages.

Note: Complete Technical Details can be found at the 24LC1026 datasheet give at the end of this page.

Equivalent of 24LC1026: 24LC512

Alternatives EEPROM’S: 24LC1026, 25LC050, 24C32

Where to use the 24LC1026 EEPROM:

The 24LC1026 8-pin EEPROM IC. As we know EEPROM stands for Electrically Erasable Programmable Read-Only Memory, we can store information on this IC and it will remain there even when the power is turned off just like your pen drive. Then the information can be retrieved or over-written when required. This IC works with Serial, 2-Wire, I2C and hence it is easy to interface with most of the MCU’s and consumes fewer pins.

24LC1026 has been developed for advanced, low-power applications such as personal communications or data acquisition. This device has both byte write and page write capability of up to 128 bytes of data.

How to use 24LC1026 EEPROM IC:

The 24LC1026 EEPROM IC communicates with the help of the I2C protocol. To interface it with an MCU just power the IC (with 3.3V or 5V) and connect the communication lines as shown below.

The Serial Clock SCK (pin 6) is connected to the SCK pin of the microcontroller and the Serial Data SDA (pin 5) is connected to the SDA pin of the microcontroller. SCK and SDA pins pulled high using two pull-up resistors. This will keep the bus at high state during the idle conditions.

Chip select pins A0, A1, and A2 have connected the three pins to the GPIO pins. Chip select pins are used only if more than one I2C device or EEPROM is connected to the same microcontroller, else three pins can be grounded directly.

The WP pin allows the user to write-protect the entire array (00000-1FFFF) when the pin is tied to VCC. If tied to VSS the write protection is disabled.  The data can be written or erased on the EEPROM only if the WP pin is held low (logic 0). Else the data written on the EEPROM will remain as such. Normally this pin will be grounded (logic 0) when the protection is not needed.

Applications of 24LC1026:

• Data Logging
• Audio devices
• Remote storage devices
• Data analytics
• Storage devices
• Used where Flash memory of MCU is less

2-D Model of 24LC1026:

2-D dimensions for 24LC1026 8-pin PDIP package is given below