STMicroelectronics

M27C4002-12F1

M27C4002-12F1 Description

The M27C4002-12F1 is a 4Mbit (256K x 16) parallel EPROM manufactured by STMicroelectronics, designed for applications requiring non-volatile memory storage with moderate speed and reliability. Operating within a 4.5V to 5.5V supply range and a temperature range of 0°C to 70°C, this device features a 120 ns access time, making it suitable for embedded systems and legacy hardware. Housed in a 40-CDIP (Ceramic Dual In-line Package) with through-hole mounting, it offers robust physical durability. Although marked as obsolete, it remains relevant for maintenance and repair of older electronic systems. The device is ROHS3 compliant and REACH unaffected, adhering to environmental standards.

M27C4002-12F1 Features

• Memory Organization: 256K x 16 configuration, providing flexible data storage.
• Parallel Interface: Enables straightforward integration with legacy microprocessors and microcontrollers.
• Wide Voltage Range: Operates at 4.5V–5.5V, compatible with standard TTL logic levels.
• Moderate Access Time: 120 ns speed balances performance and power efficiency.
• Durable Packaging: 40-CDIP through-hole design ensures mechanical stability in harsh environments.
• Environmental Compliance: ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.
• Extended Data Retention: EPROM technology ensures long-term reliability without power.

M27C4002-12F1 Applications

• Industrial Control Systems: Ideal for firmware storage in machinery with long lifecycles.
• Legacy Computing: Used in retro computing and repair of vintage computer systems.
• Automotive Electronics: Suitable for non-volatile memory in older vehicle control units.
• Medical Equipment: Reliable storage for fixed-code applications in outdated medical devices.
• Telecommunications: Backup memory for legacy telecom infrastructure requiring stable data retention.

Conclusion of M27C4002-12F1

The M27C4002-12F1 is a dependable EPROM solution for systems requiring moderate-speed, non-volatile memory with high durability. While obsolete for new designs, its wide voltage tolerance, parallel interface, and robust packaging make it invaluable for maintaining legacy electronics. Its compliance with ROHS3 and REACH standards ensures it meets modern environmental guidelines, even in niche applications. Engineers working with older hardware will find this EPROM a practical choice for repairs and long-term deployments.