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AT24C256C-SSHL-T

256Kb I2C EEPROM, 1MHz, 1.7-5.5V, 8-SOIC, 1M write cycles

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Manufacturer Part：

AT24C256C-SSHL-T

Package：

8-SOIC (5.3 x 5.25 x 1.75 mm)

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Description

Product Overview

The AT24C256C-SSHL-T from Microchip is a 256Kb I2C serial EEPROM in an 8-SOIC package. Operating from 1.7V to 5.5V with 1MHz clock, it provides reliable non-volatile storage with 1 million write cycle endurance and 100-year data retention.

Key Specifications

Density 256Kb (32K x 8)
Interface I2C (2-wire serial)
Max Clock 1MHz
Supply Voltage 1.7V ~ 5.5V
Write Cycle Time 5ms max
Endurance 1,000,000 write cycles
Data Retention 100 years
Package 8-SOIC
Operating Temperature -40°C to +85°C

Features

  • 256Kb organized as 32,768 x 8 bits
  • 1MHz I2C compatible
  • Wide voltage range: 1.7V to 5.5V
  • Hardware write protection pin
  • 64-byte page write mode
  • Schmitt trigger inputs for noise suppression
  • 100-year data retention

Applications

  • Industrial control parameter storage
  • Consumer electronics configuration data
  • Calibration data retention
  • Network device MAC address storage
  • Embedded system boot configuration

The AT24C256C-SSHL-T from Microchip Technology is a 256Kb I2C serial EEPROM providing 32,768 x 8 bits of non-volatile storage in an 8-SOIC package. Operating from 1.7V to 5.5V, it supports I2C bus speeds up to 1MHz for fast data access. The device features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger filtered inputs for robust noise immunity. With 1 million write cycle endurance and 100-year data retention, it is designed for critical parameter and configuration storage in industrial, consumer, and networking applications.

The AT24C256C uses a floating-gate EEPROM cell array organized as 32,768 x 8 bits. Communication occurs via the I2C protocol with device address bits A0-A2 enabling up to 8 devices on the same bus. Read operations can be random or sequential. Write operations use a 64-byte page write buffer that programs up to 64 bytes in a single 5ms internal write cycle. The WP pin provides hardware data protection by preventing write operations when held high. Schmitt trigger inputs filter noise on SCL and SDA lines for reliable communication in noisy environments.

Pin Name Type Function
1 A0 Input Address bit 0
2 A1 Input Address bit 1
3 A2 Input Address bit 2
4 GND Power Ground
5 SDA I/O Serial data (open-drain)
6 SCL Input Serial clock
7 WP Input Write protect (high = protect)
8 VCC Power Supply voltage (1.7-5.5V)
  • Industrial controller parameter and calibration storage
  • Consumer device user settings and preferences
  • Network equipment MAC address and serial number
  • Sensor calibration coefficient retention
  • Embedded system boot configuration and firmware flags
Manufacturer Part Number Package Notes
ST M24256-DFMC6TP 8-SOIC 256Kb, 1MHz, 1.7-5.5V
onsemi CAT24C256WI-GT3 8-SOIC 256Kb, 400kHz
Microchip AT24C512C-SSHL-T 8-SOIC 512Kb, same family
Rohm BR24G256FVT-3AGE2 8-SOIC 256Kb, 1.7-5.5V
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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