M27C512 512 Kbit (64K x8) UV EPROM and OTP EPROM features: 5V ± 10% supply voltage in read operation, access time of 45ns in read operation, low power “CMOS” consumption power, active current 30mA, standby current 100µA, programming voltage of 12.75V ± 0.25V, programming times of around 6 seconds, electronic signature manufacturer code is 20h, device code is 3Dh, and packages are FDIP28W (F), PDIP28 (B), PLCC32 (C), and TSOP28 (N).
The M27C512 is a 512 Kbit EPROM offered in UV (ultraviolet erase) and OTP (one‑time programmable) versions. It is available in four package types—FDIP28W, PDIP28, PLCC32 and TSOP28—and in lead‑free, RoHS‑compliant options. The device is organized as 65 536 × 8 bits and operates from a 5 V supply with a 45 ns access time.
The datasheet describes the device’s read, standby and programming modes, two‑line output control, and system considerations such as decoupling. Programming uses a 12.75 V + 0.25 V Vpp with typical 6 s write time, while UV erasure requires exposure to 253.7 Å light for about 15–20 minutes. Electrical characteristics, pin assignments and mechanical dimensions are detailed for each package.
| Memory capacity | 512 Kbit (64K × 8) |
|---|---|
| Access time | 45 ns |
| Active current | 30 mA |
| Standby current | 100 µA |
| Programming voltage | 12.75 V + 0.25 V |
| Supply voltage (Vcc) | 6.25 V + 0.25 V |
The programming voltage is 12.75 V + 0.25 V.
Erasure with a 253.7 Å UV lamp takes about 15 to 20 minutes.
The active current is 30 mA and the standby current is 100 µA.