Am27C040 is a 4Mbit EPROM storage device from AMD that features fast access time, low power consumption, single-supply power, 100% Flashrite™ programming, etc.
The Am27C040 EPROM provides 4 Mbit (512 K × 8‑bit) storage in a single‑supply +5 V design. It features fast access times as low as 90 ns, low standby power (<10 µA typical), and JEDEC‑approved pinouts for easy upgrade from 1 Mbit and 2 Mbit devices. The device is offered in 32‑pin ceramic DIP, plastic DIP and PLCC packages.
Programming is performed with a 12.75 V ±0.25 V Vpp pulse using AMD’s Flashrite algorithm, achieving typical programming times of about one minute. Erasure requires exposure to a 2537 Å UV lamp for 15‑20 minutes. The part operates over a wide temperature range (commercial, industrial and extended) and includes protections such as latch‑up current limiting and high noise immunity.
| Capacity | 4 Mbit (512 K × 8‑bit) |
|---|---|
| Access Time | 90 ns (fast option) |
| Active Power Consumption | 100 mW |
| Standby Power Consumption | 50 pW (typical) |
| Supply Voltage | +5 V (±10 % tolerance) |
| Programming Voltage (Vpp) | 12.75 V ± 0.25 V |
| Package Types | 32‑pin Ceramic DIP, Plastic DIP, PLCC |
Programming the device typically takes about one minute using the Flashrite algorithm.
It operates from a single +5 V supply, with a ±10 % tolerance.