AT29BV020 is a single-voltage 2.7-volt in-system Flash Programmable and Erasable Read Only Memory (PEROM). Its 2 megabits of memory is organized as 262,144 words by 8 bits. Manufactured with Atmel's advanced nonvolatile CMOS EEPROM technology, the device offers access times to 120 ns, and a low 54 mW power dissipation. When the device is deselected, the CMOS standby current is less than 50 µA. The device endurance is such that any sector can typically be written to in excess of 10,000 times. The programming algorithm is compatible with other devices in Atmel's Low Voltage Flash family of products. To allow for simple in-system reprogrammability, the AT29BV020 does not require high input voltages for programming. The device can be operated with a single 2.7V to 3.6V supply. Reading data out of the device is accomplished through internal address and data latches for 256 bytes. Two 8K bytes boot blocks with lockout are provided on the AT29BV020 and have 1024 sectors (each 256 bytes).
The AT29BV020 is a 2‑megabit in‑system flash programmable ROM that operates from a single 2.7 V to 3.6 V supply. It provides fast 120 ns read access, low active current (15 mA) and ultra‑low standby current (50 pA). The device contains 1024 sectors of 256 bytes each and two 8 KB boot blocks with optional programming lockout.
The datasheet describes pin configurations for 32‑lead PLCC and TSOP packages, the internal block diagram, and detailed operation modes including software data‑protection programming, hardware protection, and data‑polling for program‑cycle completion. Electrical characteristics, absolute maximum ratings, and packaging dimensions are also provided.
| Supply Voltage Range | 2.7 V to 3.6 V |
|---|---|
| Active Current | 15 mA |
| Standby Current | 50 pA |
| Memory Size | 2 megabits (256 K × 8) |
| Number of Sectors | 1024 sectors (256 bytes each) |
| Boot Block Size | Two 8 KB boot blocks |
| Endurance | > 10,000 program cycles |
It operates from a single 2.7 V to 3.6 V supply.
The device contains 1024 sectors, each 256 bytes in size.
The device uses DATA polling on the /07 line to indicate program‑cycle completion.
It can disable programming of the two 8 KB boot blocks after being enabled, preventing further erasure or programming of those blocks.