AT24C256C-SSHL-T: A High-Performance I²C EEPROM Ideal for Embedded Systems

The Atmel® AT24C256C provides 262,144-bits of Serial Electrically Erasable andProgrammable Read-Only Memory (EEPROM) organized as 32,768 words of eight bitseach. The device's cascading feature allows up to eight devices to share a common2-wire bus. The device is optimized for use in many industrial and commercialapplications where low-power and low-voltage operation are essential. The devices areavailable in space-saving 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, and8-ball VFBGA packages. In addition, this device operates from 1.7V to 5.5V.

Featuresl

·Low-voltage and standard-voltage operationl

   ·VCC = 1.7V to 5.5Vl

·Internally organized as 32,768 x 8l

·2-wire serial interfacel

·Schmitt Trigger, filtered inputs for noise suppressionl

·Bidirectional data transfer protocoll

·400kHz (1.7V) and 1MHz (2.5V, 2.7V, 5.0V) compatibilityl

·Write Protect pin for hardware protectionl

·64-byte page write model

   ·Partial page writes allowedl

·Self-timed write cycle (5ms max)l

·High reliabilityl

   ·Endurance: 1,000,000 write cyclesl

   ·Data retention: 40 yearsl

·Lead-free/Halogen-free devices availablel

·Green package options (Pb/Halide-free/RoHS compliant)l

   ·8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, and 8-ball VFBGA packagesl

·Die sale options: wafer form, waffle pack, and bumped wafers

Pin Configurations and Pinouts

Absolute Maximum Ratings

Operating Temperature . . . . . . . . . . .−55°C to +125°C

Storage Temperature . . . . . . . . . . .−65°C to + 150°C

Voltage on any pinwith respect to ground . . . . . . . . . . . . . .−1.0 V +7.0V

Maximum Operating Voltage. . . . . . . . . . . . . . . 6.25V

DC Output Current. . . . . . . . . . . . . . . . . . . . . . . 5.0mA

Typical Applications

1. Embedded System Configuration Storage

The AT24C256C is an ideal choice for storing configuration files, calibration parameters, and boot data in embedded systems. For instance, in an embedded instrument controlled by STM32, the system can read the last saved device configuration from the EEPROM upon power-on, achieving "power-off memory".

2. Industrial Automation and Automotive Electronics

In devices such as PLCs, industrial controllers, and ECUs, the AT24C256C can be used to store critical operating parameters, debugging data, sensor calibration information, etc., ensuring that key states are retained even after power loss or system restart.

3. Consumer Electronic Devices

In televisions, smart speakers, and wearable devices, EEPROM can be used to store user settings, language options, pairing information, last usage status, etc., enhancing user experience and system stability.

4. Communication Modules and Network Devices

In routers, modems, and SFP optical modules, EEPROM is often used to store MAC addresses, manufacturer information, upgrade status, and diagnostic data, facilitating the rapid identification and maintenance of the devices.

Operation Mode  

1. Write operation

-byte write (maximum cycle of 5ms)

-page write (64 bytes/page)

-write protection mechanism

2. Read operation

-current address read

-random address read

-continuous read

3. Bus protocol

-start/stop conditions

-response mechanism

-software reset procedure

Package Info:

Package: 8-lead SOIC (Small Outline Integrated Circuit)

Package Code: SSHL (SOIC, JEDEC standard)

RoHS compliant: Yes

Tape & Reel packaging: The"-T"suffix indicates it comes in tape-and-reel packaging for automated assembly.

Conclusion

The AT24C256C-SSHL-T excels in terms of its high capacity, strong compatibility, ultra-low power consumption and excellent reliability, and plays a crucial role in embedded systems. Whether it is for storing parameters in industrial control equipment, saving personalized settings in consumer electronics, or recording critical data in vehicle systems, it offers a stable and efficient solution. If you are looking for a stable, user-friendly and cost-effective I²C EEPROM chip, AT24C256C-SSHL-T is definitely a choice you shouldn't miss.