The MR27V402D is a 4Mbit electrically Programmable Read-Only Memory with a configurable switch between 262,144 word x 16bit and 524,288 word x 8bit. It operates on a single +3V-3.3V power supply and is TTL compatible. The MR27V402D operates asynchronously, eliminating the need for external clocks and making it easy to use. It is suitable for use as a large-capacity fixed memory for microcomputers and data terminals. The device is manufactured using a CMOS double silicon gate technology and is available in 40-pin DIP, 40-pin SOP, or 44-pin TSOP packages.
The MR27V402D is a 4Mbit electrically Programmable Read-Only Memory (PROM) manufactured by OKI Semiconductor. Its configuration can be electrically switched between 262,144 words x 16 bits and 524,288 words x 8 bits. The device operates on a single +3V to +3.3V power supply and is TTL compatible.
| Memory Capacity Configuration | 262,144-Word x 16-Bit or 524,288-Word x 8-Bit |
|---|---|
| Total Memory Size | 4Mbit |
| Operating Voltage (Vcc) | +3V to +3.3V |
| Access Time (@ 3V) | 90ns |
| Access Time (@ 3.3V) | 70ns |
| Operating Temperature Range | 0 to 70 °C |
| Storage Temperature Range | -55 to 125 °C |
| Available Packages | 40-pin DIP, 40-pin SOP, 44-pin TSOP |
The device can be electrically switched between a 262,144 word x 16-bit mode and a 524,288 word x 8-bit mode.
No, the device operates asynchronously so external clocks are not required.
The recommended power supply voltage (Vcc) ranges from 2.7V to 3.6V.