AT93C46D is a 1024-bit serial electrically erasable programmable read-only memory (EEPROM), organized as 64 words of 16 bits each (when the ORG pin is connected to VCC), and 128 words of 8 bits each (when the ORG pin is tied to ground). The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operations are essential. AT93C46D is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin mini-MAP (MLP 2x3), 8-lead TSSOP, and 8-lead dBGA2 packages. AT93C46D 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. The Write cycle is completely self-timed, and no separate Erase cycle is required before Write. The Write cycle is only enabled when the part is in the Erase/Write state.
The AT93C46D three‑wire serial EEPROM provides 1024 bits of memory, configurable as 128 × 8 bits or 64 × 16 bits. It is designed for low‑power, low‑voltage applications and is available in several 8‑lead packages such as PDIP, SOIC, Ultra Thin mini‑MAP, TSSOP and dBGA2.
The document includes absolute maximum ratings, DC and AC electrical characteristics, pin configurations, instruction set, timing diagrams, and revision history. Key specifications such as supply voltage range, clock rate, endurance, and data retention are listed, along with contact information for Atmel worldwide.
| Supply Voltage | 1.8 V – 5.5 V |
|---|---|
| Clock Rate | 2 MHz (5 V) |
| Endurance | 1 Million write cycles |
| Data Retention | 100 years |
| Package Options | 8‑lead PDIP, SOIC, Ultra Thin mini‑MAP, TSSOP, dBGA2 |
| Input Low Voltage | 0.6 V – 0.8 V |
| Standby Current (1.8 V) | 0.4 µA – 1.0 µA |
It can be organized as 128 × 8 bits or 64 × 16 bits depending on the ORG pin setting.
The device operates up to 2 MHz when powered at 5 V.
It is rated for 1 million write cycles.
The EEPROM works from 1.8 V to 5.5 V.