Key facts
Start here
Atmel AT45DB021D Datasheet
The AT45DB021D is a 2.7 V to 3.6 V serial‑interface Flash memory offering up to 66 MHz RapidS® clock rates. It provides 1,024 pages of 256 bytes or 264 bytes each, a single 256‑byte SRAM buffer, and flexible erase options (page, block, sector, chip). Low‑power operation includes 7 mA active read current, 25 pA standby current and 5 pA deep‑power‑down current.
The device is accessed via a three‑wire SPI‑compatible interface (CS, SI, SO, SCK) with optional write‑protect and reset pins. Detailed command sets cover continuous array reads, page reads, buffer reads, and program/erase operations, all self‑timed and supporting up to 100 k program/erase cycles per page with 20‑year data retention.
Atmel AT45DB021D specifications
| Supply Voltage | 2.7 V to 3.6 V |
|---|---|
| Maximum Clock Frequency | 66 MHz |
| Page Size | 256 bytes or 264 bytes |
| Number of Pages | 1,024 |
| Erase Options | Page (256 B), Block (2 KB), Sector (32 KB), Chip (2 Mbits) |
| Active Read Current | 7 mA typical |
| Standby Current | 25 pA typical |
| Deep Power‑Down Current | 5 pA typical |
| Program/Erase Cycle Endurance | 100,000 cycles per page minimum |
| Data Retention | 20 years |
Source: Atmel AT45DB021D Datasheet
All Atmel AT45DB021D documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What supply voltage range does the AT45DB021D operate at?
It operates from a single supply of 2.7 V to 3.6 V for both programming and reading.
What is the maximum clock frequency for the RapidS serial interface?
The RapidS serial interface supports up to 66 MHz clock frequency.
What supply voltage range does the AT45DB021D support?
It operates from a single power supply of 2.7 V to 3.6 V.
What is the maximum clock frequency for the serial interface?
The RapidS serial interface can run up to 66 MHz.