The AT24C256 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 4 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 EIAJ SOIC, 8-lead MAP (24C128), 8-lead TSSOP, 8-lead SOIC Array Package, and 8-ball dBGA2 packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.
24C256 Pinout
24C256 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | A0 | User Configurable Chip Select |
| 2 | A1 | User Configurable Chip Select |
| 3 | NC | No Connection |
| 4 | GND | Ground Pin |
| 5 | SDA | Serial Data Pin |
| 6 | SCL | Serial Clock Pin |
| 7 | WP | Write Protect Pin |
| 8 | VCC | Power Supply Pin |
24C256 Key Features
- Low-voltage and Standard-voltage Operation
- 2.7 (VCC = 2.7V to 5.5V)
- 1.8 (VCC = 1.8V to 3.6V)
- Internally Organized 16,384 x 8 and 32,768 x 8
- Two-wire Serial Interface
- Schmitt Trigger, Filtered Inputs for Noise Suppression
- Bidirectional Data Transfer Protocol
- 1 MHz (5V), 400 kHz (2.7V, 2.5V) and 100 kHz (1.8V) Compatibility
- Write Protect Pin for Hardware and Software Data Protection
- 64-byte Page Write Mode (Partial Page Writes Allowed)
- Self-timed Write Cycle (5 ms Max)
- High Reliability
- Endurance: One Million Write Cycles
- Data Retention: 40 Years
- Extended Temperature and Lead-free/Halogen-free Devices Available
You can download this datasheet for 24C256 32kx8 Serial CMOS EEPROM – Datasheet from the link given below:
