| Density | 256K |
| Interface Type | 2-WIRE |
| Organization | 32768 x 8 |
| Vcc (V) | 1.8, 2.7 |
| Pb-Free Packages |
VDFN 8 PDIP 8 SOIC 8 TSSOP 8 dBGA2 8 |
256Kbit, 2-wire Bus Serial EEPROM with full memory Write Protect, supports up to 8 devices on single 2-Wire bus.
The AT24C256B provides 262,144 bits of serial electrically erasable and programmable read-only memory (EEPROM) organized as 32,768 words of 8 bits each. The device’s cascadable feature allows up to eight devices to share a common two-wire bus. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The devices are available in space-saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin SAP, 8-lead TSSOP, and 8-ball dBGA2 packages. In addition, the entire family is available in a 1.8V (1.8V to 5.5V) version.
| Ordering Code | Package | Voltage Range |
Operation Range |
| AT24C256B-PU | 8P3 | 1.8V | Lead-free/Halogen-free/ Industrial Temperature (–40°C to 85°C) |
| AT24C256BN-SH-B | 8S1 | 1.8V | |
| AT24C256BN-SH-T | 8S1 | 1.8V | |
| AT24C256BW-SH-B | 8S2 | 1.8V | |
| AT24C256BW-SH-T | 8S2 | 1.8V | |
| AT24C256B-TH-B | 8A2 | 1.8V | |
| AT24C256B-TH-T | 8A2 | 1.8V | |
| AT24C256BY7-YH-T | 8Y7 | 1.8V | |
| AT24C256BU2-UU-T | 8U2-1 | 1.8V |
