EC24C128B- 128K bits Two-wire Serial EEPROM

General description

The EC24C128B is an industrial standard   electrically erasable programmable read only   memory (EEPROM) device that utilizes the  industrial standard 2-wire interface for  communications. The EC24C128B contains a  memory array of 128K bits (16,384×8), which is organized in 64-byte per page.

The EEPROM operates in a wide voltage range from 1.7V to 5.5V, which fits most application.  The product provides low-power operations and low standby current. The device is offered in   Lead-free, RoHS, halogen free  or  Green package. The available package types are 8-pin  SOP, TSSOP, DFN, MSOP.

The EC24C128B is compatible to the standard 2-wire bus protocol. The simple bus consists of Serial Clock (SCL) and Serial  Data  (SDA)  signals. Utilizing such bus protocol, a Master   device, such as a microcontroller, can usually

control one or more Slave devices, alike this EC24C128B.

The bit stream over the SDA line includes a series of bytes, which identifies a particular Slave device, an instruction, an address  within  that  Slave  device, and a series of data, if appropriate. The EC24C128B also has a Write  Protect Function via WP pin to cease from overwriting the data stored inside the memory array.

In order to refrain the state machine entering into a wrong

State during power-up sequence or a power toggle off-on

condition, a power on reset circuit is embedded. During

power-up, the device does not respond to any instructions

until the supply voltage (VCC) has reached an  acceptable

stable level above the reset threshold voltage. Once VCC

passes the power on reset threshold, the device is reset

and enters into the Standby mode. This would also avoid

any inadvertent Write operations during power-up stage.

During power-down process, the device will enter into

standby mode, once VCC drops below the power on reset

threshold voltage. In addition, the device will be in standby

mode after receiving the Stop command, provided that no

internal write operation is in progress. Nevertheless, it is not recommended to send a command until the VCC reaches its operating level.

This product offers an additional page (Identification Page)

Of 64 bytes. The Identification Page can be used to store

sensitive application parameters which can be (later) permanently locked in Read-only mode.



● Two-Wire Serial Interface, I2CTM Compatible

– Bi-directional data transfer protocol

● Wide-voltage Operation

– VCC = 1.7V to 5.5V

● Speed: 400 KHz (1.7V) and 1 MHz (2.5V~5.5V)

● Standby current (max.): 1uA, 1.7V

● Operating current (max.): 0.4mA, 1.7V

● Hardware Data Protection

– Write Protect Pin

● Sequential & Random Read Features

● Memory organization: 128Kb(16,384 x 8 bits)


● Page Size: 64 bytes

● Page write mode

– partial page writes allowed

● Addition write lockable page(identification page)

● Self timed write cycle: 5ms (max.)

● Noise immunity on inputs, besides Schmitt trigger

● High-reliability

– Endurance: 1 million cycles

– Data retention: 100 years

● Industrial temperature grades


● Lead-free, RoHS, Halogen free, Green

Pin Configurations

Ordering info