24LC1026 Serial EEPROM

12 December 2019 - 0 Comments

24LC1026 Serial EEPROM

24LC1026 Serial EEPROM Pinout

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:

Pin Number	Pin Name	Description
1,2,3	A0,A1,A2	User configured Chip Select pins, useful during cascading
4	Vss (Ground)	Connected to the ground of the circuit
5	Serial Data (SDA)	Serial Data pin for I2C Communication
6	Serial Clock (SCL)	Serial Clock pin for I2C Communication
7	Write-Protect	If connected to Vss write is enabled, if connected to Vcc write is disabled.
8	Vcc	Connect to supply rail

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.

24LC1026 Application Circuit

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.