The M27W512 is a low voltage 512 Kbit EPROM suitable for microprocessor systems. It operates at a supply voltage range of 2.7V to 3.6V and features low power consumption, high reliability, etc.
The document describes the M27W512, a 512 Kbit (64Kb x8) Low Voltage UV EPROM and OTP EPROM offered by STMicroelectronics. It is organized as 65,536 by 8 bits and operates in read mode with a supply voltage as low as 2.7V within the -40 to 85°C temperature range.
The device is available in UV erase versions (FDIP28W package) which allow erasure via ultraviolet light through a transparent lid, and OTP versions (PDIP28, PLCC32, TSOP28 packages) for one-time programming. It features pin compatibility with the M27C512 and includes an electronic signature consisting of Manufacturer Code 20h and Device Code 3Dh.
| Memory Size | 512 Kbit (64Kb x8) |
|---|---|
| Supply Voltage (Read) | 2.7V to 3.6V |
| Access Time (High Speed) | 70ns at Voc = 3.0V to 3.6V |
| Access Time (Standard) | 80ns at Voc = 2.7V to 3.6V |
| Standby Current (CMOS) | 15uA max |
| Active Current | 15mA max at 5MHz |
| Programming Time | 100us/byte |
| ESD Protection | 2,000V |
The manufacturer code is 20h and the device code is 3Dh.
Yes, it is pin compatible with the M27C512.
The ambient operating temperature range is -40 to 85°C, while the temperature under bias is -50 to 125°C.