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AT24C256N 256Kbit I²C Serial EEPROM IC SOP-8 – Pack of 5 (24C256)
AT24C256N 256Kbit I²C Serial EEPROM IC SOP-8 – Pack of 5 (24C256)
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AT24C256N 256Kbit I²C Serial EEPROM IC — SOP-8, 32KB, 400kHz, 5-Pack
The AT24C256N (24C256) is a 256Kbit (32KB) I²C serial EEPROM from Microchip (formerly Atmel), widely used for non-volatile data storage in Arduino data loggers, embedded system configuration, calibration data, and industrial equipment. With 400kHz I²C speed, 1 million write endurance, and 100-year data retention, it is the industry-standard choice for reliable embedded storage in SOP-8 SMD package.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | AT24C256N (24C256) |
| Capacity | 256Kbit = 32KB |
| Interface | I²C (2-wire: SDA + SCL) |
| Max I²C Speed | 400kHz (Fast Mode) |
| Supply Voltage | 2.7V – 5.5V |
| I²C Address Range | 0x50 – 0x57 (A0–A2 configurable) |
| Page Write Size | 64 bytes |
| Write Cycle Time | 5ms (max) |
| Write Endurance | 1,000,000 cycles |
| Data Retention | 100 years |
| Write Protect Pin | Yes (WP pin) |
| Package | SOP-8 (SOIC-8) |
| Operating Temperature | -40°C to +85°C |
| Pack Quantity | 5 pieces |
SOP-8 Pin Configuration
| Pin | Name | Function |
|---|---|---|
| 1–3 | A0–A2 | I²C address selection (0x50–0x57) |
| 4 | VSS | Ground |
| 5 | SDA | I²C data |
| 6 | SCL | I²C clock |
| 7 | WP | Write protect (HIGH = protected) |
| 8 | VCC | Supply voltage |
Why Choose AT24C256N?
- ✅ 32KB capacity — stores thousands of sensor readings or configuration parameters
- ✅ Up to 8 ICs on one I²C bus — expandable to 256KB total storage
- ✅ 1 million write cycles — long service life for data logging applications
- ✅ 100-year data retention — reliable non-volatile storage
- ✅ Write protect pin — hardware protection against accidental writes
- ✅ 5-pack value — spares for prototyping and production
Typical Applications
- Arduino data logger non-volatile storage
- Embedded system configuration and calibration data
- User preferences and settings storage
- Industrial equipment parameter storage
- Cascaded I²C EEPROM for up to 256KB total storage
Package Contents
- 5 × AT24C256N (24C256) 256Kbit I²C EEPROM IC (SOP-8)
