The AT93C66 provides 4096 bits of serial electrically erasable programmable read-only memory (EEPROM), organized as 256 words of 8 bits each (when the ORG pin is connected to VCC), and 128 words of 8 bits each (when the ORG pin is tied to the ground). The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operations are essential.
The AT93C66 is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead mini-MAP (MLP 2×3), 8-lead TSSOP, and 8-lead dBGA2 packages. The AT93C66 is enabled through the Chip Select pin (CS) and accessed via a three-wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the address is decoded and the data is clocked out serially on the DO pin.
93C66 Pinout
93C66 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | CS | Chip Select Pin |
| 2 | SK | Serial Clock Pin |
| 3 | DI | Serial Data Input Pin |
| 4 | D0 | Serial Data Output Pin |
| 5 | GND | Ground Pin |
| 6 | ORG | Internal Organization Pin |
| 7 | DC | Don’t Connect Pin |
| 8 | VCC | Power Supply Pin |
93C66 Key Feature
- Low-voltage and Standard-voltage Operation
- 2.7 (VCC = 2.7V to 5.5V)
- 1.8 (VCC = 1.8V to 5.5V)
- User-selectable Internal Organization
- 1K: 128 x 8 or 64 x 16
- 2K: 256 x 8 or 128 x 16
- 4K: 512 x 8 or 256 x 16
- Three-wire Serial Interface
- 2 MHz Clock Rate (5V)
- Self-timed Write Cycle (10 ms max)
- High Reliability
- Endurance: 1 Million Write Cycles
- Data Retention: 100 Years
You can download this datasheet for 93C66 4K EEPROM – Datasheet from the link given below:
