The AT27LV256A is a high-performance, low-power, low-voltage 262,144-bit one-time programmable read-only memory (OTP EPROM) organized as 32K by 8 bits. It requires only one supply in the range of 3.0V 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 3.3V supply. At VCC = 3.0V, any byte can be accessed in less than 55 ns. With a typical power dissipation of only 18 mW at 5 MHz and VCC = 3.3V, the AT27LV256A consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 µA at 3.3V. The AT27LV256A is available in industrial temperature range.
The AT27LV256A is a high‑performance, low‑power, low‑voltage 262,144‑bit one‑time programmable read‑only memory organized as 32K × 8 bits. It operates from a single supply of 3.0 V to 3.6 V (or standard 5 V ± 10 %) and offers fast 55 ns read access, 29 mW active power at 5 MHz and sub‑µA standby current.
The device is supplied in JEDEC‑approved PLCC, SOIC and TSOP packages, provides dual‑voltage operation, 2 kV ESD protection, 200 mA latch‑up immunity, and includes a rapid programming algorithm of 100 ps/byte. Detailed pin configurations, timing diagrams, absolute maximum ratings and mechanical dimensions are provided in the document.
| Memory size | 256 Kbit (32K × 8) |
|---|---|
| Read access time | 55 ns |
| Supply voltage range | 3.0 V – 3.6 V (low‑voltage) or 5 V ± 10 % |
| Standby current | < 1 µA typical |
| Operating temperature range | -40 °C to +85 °C |
| ESD protection | 2 kV |
| Latchup immunity | 200 mA |
| Programming speed | 100 ps/byte (typical) |
| Package types | 32‑lead PLCC, 28‑lead SOIC, 28‑lead TSOP |
The device provides a fast read access time of 55 ns.
It operates from a low‑voltage range of 3.0 V to 3.6 V or from a standard 5 V ± 10 % supply.
The AT27LV256A is rated for an industrial temperature range of –40 °C to +85 °C.