STMicroelectronics

M27C4002-10C1

M27C4002-10C1 Description

The M27C4002-10C1 is a 4Mbit (256K x 16) parallel EPROM manufactured by STMicroelectronics, designed for applications requiring non-volatile memory storage. Operating within a 4.5V to 5.5V supply range and featuring a 100 ns access time, this device is optimized for high-performance embedded systems. Housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package, it supports surface-mount technology (SMT) and is RoHS3 compliant, ensuring adherence to environmental standards. Although marked as obsolete, it remains relevant for legacy systems due to its reliability and parallel interface, which simplifies integration with microcontrollers and processors.

M27C4002-10C1 Features

• Memory Organization: 256K x 16 configuration, offering flexible data storage.
• Operating Temperature: 0°C to 70°C, suitable for industrial and commercial environments.
• Fast Access Time: 100 ns ensures efficient data retrieval for time-critical applications.
• Parallel Interface: Simplifies direct connection to microprocessors without complex protocol conversion.
• Moisture Sensitivity Level (MSL) 3: Requires careful handling but allows 168 hours of exposure before baking.
• EPROM Technology: UV-erasable, enabling reprogramming for prototyping and development.
• RoHS3 Compliance: Meets modern environmental regulations, unlike older non-compliant alternatives.

M27C4002-10C1 Applications

• Legacy Industrial Systems: Ideal for machinery control, PLCs, and automation equipment requiring stable, non-volatile memory.
• Embedded Computing: Used in older microcontroller-based systems where parallel EPROMs are preferred for simplicity.
• Telecommunications: Supports firmware storage in routers, switches, and base stations with 5V logic compatibility.
• Medical Devices: Reliable for fixed-code storage in diagnostic equipment due to its endurance and data retention.
• Automotive Electronics: Suitable for obsolete ECU designs where reprogrammability is critical for updates.

Conclusion of M27C4002-10C1

The M27C4002-10C1 is a robust 4Mbit parallel EPROM offering fast access times, wide voltage tolerance, and industrial-grade reliability. While obsolete, its parallel interface and UV-erasability make it valuable for maintaining or upgrading legacy systems. Its RoHS3 compliance ensures compatibility with modern environmental standards, distinguishing it from older non-compliant EPROMs. Engineers working with industrial controls, embedded systems, or retrofits will find this IC a dependable solution for non-volatile memory needs.