Atmel AT27BV020 is a high-performance, low-power, low-voltage, 2,097,152-bit, one-time programmable, read-only memory (OTP EPROM) organized as 256K by 8 bits.
The AT27BV020 is a 2‑Megabit, one‑time programmable (OTP) EPROM that operates from 2.7 V to 3.6 V (or 5 V ±10%). It offers fast read access (≤90 ns) and low power consumption, making it suitable for battery‑powered portable systems. The device is available in standard JEDEC packages such as 32‑lead PLCC, TSOP, VSOP and a 42‑ball BGA.
The datasheet details pin assignments, timing diagrams, absolute maximum ratings, and programming characteristics. Key features include a rapid programming algorithm (≈100 µs/byte), integrated product identification code, 2 kV ESD protection, and operation over an industrial temperature range of –40 °C to +85 °C.
| Read Access Time | 90 ns |
|---|---|
| Supply Voltage Range | 2.7 V to 3.6 V (or 5 V ±10%) |
| Standby Current | < 1 µA (typical at 3 V) |
| Programming Speed | ≈100 µs per byte |
| Power Consumption (Read) | 18 mW at 5 MHz |
| ESD Protection | 2,000 V |
| Latch‑up Immunity | 200 mA |
| Package Types | 32‑lead PLCC, 32‑lead TSOP, 32‑lead VSOP, 42‑ball BGA |
The device operates from 2.7 V to 3.6 V, and it also supports a standard 5 V supply with a ±10 % tolerance.
Typical programming time is about 100 µs per byte using the rapid programming algorithm.
Standby current is typically less than 1 µA at a 3 V supply.
It is offered in 32‑lead PLCC, 32‑lead TSOP, 32‑lead VSOP, and a 42‑ball BGA package.