The M27C512 512 Kbit (64K x8) UV EPROM and OTP EPROM features the following: 5V ± 10% supply voltage in read operation; 45ns access time; low power “CMOS” consumption: active current 30mA, standby current 100µA; 12.75V ± 0.25V programming voltage; programming times of around 6sec.; electronic signature with manufacturer code 20h; device code 3Dh; lead-free versions of the packages are 1 28-pin PDIP28 (B), 1 28-pin FDIP28W (F), 1 32-pin PLCC32 (C) and 1 28-pin TSOP28 (N).
The M27C512 is a 512 Kbit EPROM offered in UV (ultraviolet erase) and OTP (one‑time programmable) versions. It is organized as 65 536 × 8 bits and is available in FDIP28W, PDIP28, PLCC32 and TSOP28 packages, including lead‑free options compliant with RoHS.
Key electrical characteristics include a 5 V ± 10 % read supply voltage, 45 ns access time, 30 mA active current, 100 µA standby current, and a programming voltage of 12.75 V ± 0.25 V with typical programming times of about 6 seconds. The device uses a PRESTO IIB programming algorithm and supports an electronic signature mode to identify manufacturer and device codes.
| Memory size | 512 Kbit (64K × 8) |
|---|---|
| Read supply voltage | 5 V ± 10 % |
| Access time | 45 ns |
| Active current | 30 mA |
| Standby current | 100 µA |
| Programming voltage | 12.75 V ± 0.25 V |
| Typical programming time | ≈ 6 s |
| Manufacturer code | 20h |
| Device code | 3Dh |
| Vcc supply voltage | 6.25 V ± 0.25 V |
| Erasure UV wavelength | < 4000 Å |
| Recommended decoupling capacitor per device | 0.1 µF ceramic |
| Bulk capacitor per eight devices | 4.7 µF electrolytic |
The M27C512 requires a 5 V supply with a tolerance of ±10 % for read operation.
Programming the device typically takes around 6 seconds.