STMicroelectronics

M27C512-90C1

M27C512-90C1 Description

The M27C512-90C1 is a 512Kbit (64K x 8) parallel EPROM manufactured by STMicroelectronics, designed for applications requiring non-volatile memory storage with moderate access speeds. Operating within a 4.5V to 5.5V supply range, this device features a 90 ns access time, making it suitable for systems where reliable data retrieval is critical. The memory is organized in an 8-bit parallel interface, ensuring compatibility with a wide range of microcontrollers and legacy systems. Housed in a 32-PLCC (Plastic Leaded Chip Carrier) surface-mount package, it adheres to RoHS3 compliance and is rated for MSL 3 (168 hours) moisture sensitivity.

M27C512-90C1 Features

• Memory Capacity: 512Kbit (64K x 8) organization, ideal for medium-density storage needs.
• Fast Access Time: 90 ns access speed balances performance and power efficiency.
• Wide Voltage Range: Operates at 4.5V–5.5V, ensuring compatibility with 5V systems.
• Parallel Interface: Simplifies integration with legacy and embedded systems.
• Surface-Mount Package: 32-PLCC form factor saves board space in compact designs.
• Robust Compliance: RoHS3 and REACH unaffected, meeting environmental standards.
• Extended Temperature Range: Operates reliably from 0°C to 70°C, suitable for industrial and consumer applications.

M27C512-90C1 Applications

This EPROM is particularly suited for:

• Legacy System Upgrades: Replacing older EPROMs in industrial control systems.
• Embedded Firmware Storage: Storing boot code or fixed-configuration data in microcontroller-based designs.
• Automotive Electronics: Non-volatile memory for infotainment or diagnostic systems (within its temperature range).
• Medical Devices: Reliable data retention in low-complexity medical equipment.
• Retro Computing: Restoring or maintaining vintage computer systems requiring parallel EPROMs.

Conclusion of M27C512-90C1

The M27C512-90C1 offers a balanced combination of speed, reliability, and compatibility, making it a practical choice for systems requiring non-volatile memory with moderate performance. While marked as obsolete, it remains valuable for maintenance, repairs, or legacy designs. Its parallel interface, 5V operation, and industrial-grade temperature range ensure versatility across multiple sectors, from embedded systems to retro computing. Engineers seeking a proven EPROM solution will find this device a dependable option for fixed-code storage applications.