| Density | 256K |
| Interface Type | SPI |
| Organization | 32768 x 8 |
| Pb-Free Packages |
PDIP 8 UDFN 8 SOIC 8 SOIC (EIAJ) 8 TSSOP 8 dBGA2 8 |
256Kbit, SPI Bus Serial EEPROM, High speed, supports Mode 0 and 3.
The AT25128B/256B provides 131,072/262,144 bits of serial electrically-erasable programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8 bits each. 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 PDIP, 8-lead EIAJ SOIC, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-ball dBGA2 and 8-lead SAP packages. In addition, the entire family is available in 1.8V (1.8V to 5.5V).
The AT25128B/256B is enabled through the Chip Select pin () and accessed via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). All programming cycles are completely self-timed, and no separate Erase cycle is required before Write.
| Ordering Code | Package | Voltage Range |
Operation Range |
| AT25256B-PU AT25256BN-SU AT25256BW-SU AT25256B-TU AT25256BU2-UU AT25256BY6-YH |
8P3 8S1 8S2 8A2 8U2-1 8Y6 |
1.8 1.8 1.8 1.8 1.8 1.8 |
Lead-free/Halogen-free/ Industrial Temperature (-40 to 85°C) |