The AT27BV512 is a high-performance, low-power, low-voltage 524,288-bit one-time programmable read-only memory (OTP EPROM) organized as 64K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read mode operation, making it ideal for fast, portable systems using either regulated or unregulated battery power. Atmel’s innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3V supply. At VCC = 2.7V, any byte can be accessed in less than 70 ns. With a typical power consumption of only 18 mW at 5 MHz and VCC = 3V, the AT27BV512 consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 µA.
The AT27BV512 is a 524,288‑bit (64K × 8) one‑time programmable EPROM that operates from a single supply voltage of 2.7 V to 3.6 V. It offers fast read access (70 ns) and very low standby current (<1 pA at 3 V), making it suitable for battery‑powered portable systems.
The device is offered in JEDEC‑standard surface‑mount packages (32‑lead PLCC, 28‑lead SOIC, 28‑lead TSOP) and includes features such as rapid programming (≈100 µs/Byte), integrated product identification code, and high‑reliability CMOS technology with 2 kV ESD protection and 200 mA latch‑up immunity.
| Read Access Time | 70 ns |
|---|---|
| Supply Voltage Range | 2.7 V to 3.6 V |
| Standby Current | < 1 pA at 3 V |
| Active Power Consumption | 18 mW at 5 MHz, VCC=3 V |
| ESD Protection | 2000 V |
| Latchup Immunity | 200 mA |
| Programming Speed | ≈100 µs/Byte (typical) |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Types | 32‑lead PLCC, 28‑lead SOIC, 28‑lead TSOP |
The device provides a read access time of 70 ns.
It operates from an unregulated battery voltage of 2.7 V to 3.6 V (and also from standard 5 V supplies).
Standby current is typically less than 1 pA at a 3 V supply.
The EPROM is offered in 32‑lead PLCC, 28‑lead SOIC, and 28‑lead TSOP surface‑mount packages.