The AT27LV040A is a high-performance, low-power, low-voltage, 4,194,304-bit one-time programmable read-only memory (OTP EPROM) organized as 512K by 8 bits. It requires only one supply in the range of 3.0 to 3.6V in normal read mode operation, making it ideal for fast, portable systems using 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 = 3.0V, any byte can be accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and VCC = 3.3V, the AT27LV040A consumes less than one half the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 µA at 3.3V.
The AT27LV040A is a 4‑Megabit (512K × 8) one‑time programmable EPROM that operates from a single low‑voltage supply (3.0 V – 3.6 V) and offers fast read access (90 ns). It is available in JEDEC‑standard PLCC, TSOP and VSOP packages and includes features such as rapid programming, low standby current, and industrial‑grade temperature range.
The datasheet provides detailed pin configurations, timing diagrams, absolute maximum ratings, operating modes, and package dimensions, helping designers integrate the device into battery‑powered or dual‑supply systems.
| Memory size | 4 Megabit (512 K × 8) |
|---|---|
| Read access time | 90 ns |
| Supply voltage (low‑voltage range) | 3.0 V – 3.6 V |
| Supply voltage (dual‑supply range) | 4.5 V – 5.5 V |
| Operating temperature (case) | -40 °C – +85 °C |
| Package options | 32‑lead PLCC, 32‑lead TSOP, 32‑lead VSOP |
| Programming speed | 100 ps/Byte (typical) |
The device provides a fast read access time of 90 ns.
The device is offered in 32‑lead PLCC, 32‑lead TSOP, and 32‑lead VSOP packages.