M27W402 is a low power version of M27C4002, working voltage range is 2.7V-3.6V, with a transparent lid that can be erased by ultraviolet light, supporting 256Kbx16 data storage.
The M27W402 is a 4 Mbit (256Kb x 16) EPROM available in both Ultra Violet (UV) erasable and One Time Programmable (OTP) versions. It operates with a low supply voltage ranging from 2.7V to 3.6V in read mode, making it suitable for battery-powered microprocessor systems. The device is organized as 262,144 by 16 bits and is pin compatible with the M27C4002.
| Memory Capacity | 4 Mbit (256Kb x 16) |
|---|---|
| Organization | 262,144 x 16 bits |
| Supply Voltage (Read) | 2.7V to 3.6V |
| Access Time (High Speed) | 80ns |
| Access Time (Standard) | 100ns |
| Standby Current | 15uA max |
| Active Current | 15mA max |
| Programming Time | 100us/word |
| Operating Temperature | -40 to 85 °C |
| ESD Protection | 2,000V |
The manufacturer code is 0020h and the device code is 0044h.
Yes, it is pin compatible with the M27C4002.