The M27V402 is a 4Mbit low voltage UV EPROM and OTP EPROM, with low voltage read operation, fast access time, low power consumption, programming voltage and programming time.
The M27V402 is a 4 Mbit (256 Kb × 16) low‑voltage, low‑power UV‑erasable and electrically programmable EPROM designed for handheld and portable microprocessor systems. It operates from 3 V to 3.6 V in read mode and features a transparent FDIP40W package for UV erasure.
The document provides pin‑out diagrams, absolute maximum ratings, electrical characteristics for read, standby, and programming modes, as well as package mechanical data and recommended decoupling practices for reliable system integration.
| Low Voltage Read Operation | 3 V to 3.6 V |
|---|---|
| Fast Access Time | 120 ns |
| Active Current (5 MHz) | 15 mA |
| Standby Current | 20 µA |
| Programming Voltage | 12.75 V + 0.25 V |
| Typical Programming Time | 100 s/byte |
The M27V402 reads correctly with a supply voltage between 3 V and 3.6 V.
Programming is performed with a Vpp of 12.75 V plus 0.25 V.
A typical programming pulse lasts about 100 seconds per byte.
The fastest access time specified is 120 nanoseconds.