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AT27C040-12JI - 4Mbit Parallel EPROM Memory IC

The AT27C040-12JI from Microchip Technology is a high-performance 4-megabit (512K x 8) one-time programmable EPROM designed for embedded systems and industrial applications requiring reliable, non-volatile memory storage. With a fast 120ns access time and wide operating temperature range of -40°C to 85°C, this component delivers dependable performance in demanding environments.

Key Features & Benefits

  • High-Density Storage: 4Mbit capacity organized as 512K x 8 for flexible data management
  • Fast Access Time: 120ns access enables rapid data retrieval for time-critical applications
  • Industrial Temperature Range: Operates reliably from -40°C to 85°C for harsh environments
  • Standard Parallel Interface: Easy integration with microcontrollers and embedded systems
  • Surface Mount Package: 32-PLCC (13.97x11.43mm) J-lead package for automated assembly
  • Wide Voltage Range: 4.5V to 5.5V supply voltage for compatibility with standard logic levels

Ideal Applications

Perfect for firmware storage, boot code, lookup tables, embedded control systems, industrial automation, automotive electronics, and legacy system maintenance where long-term availability and proven reliability are essential.

Why Choose HQICKEY?

We provide 100% authentic Microchip components with full traceability, dedicated technical support, and long lifecycle availability to support your production needs. Our global fulfillment ensures reliable delivery for OEMs and system integrators worldwide.


Related Resources

Explore our complete range of Memory ICs for embedded and industrial applications. Visit our homepage to discover our full catalog of authentic components. Stay updated with the latest industry insights and technical guides on our technical blog.

Product attributes Property Value
Manufacturer Microchip Technology
Product Series
Packaging Tube |
Memory Type Non-Volatile
Memory Format EPROM
Technology EPROM - OTP
Memory Size 4Mbit
Memory Organization 512K x 8
Memory Interface Parallel
Clock Frequency -
Write Cycle Time - Word, Page -
Access Time 120 ns
Voltage - Supply 4.5V ~ 5.5V
Operating Temperature -40°C ~ 85°C (TC)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 32-LCC (J-Lead)
Supplier Device Package 32-PLCC (13.97x11.43)