M27C4001-10C1

Memory IC Overview

The M27C4001-10C1 is a 4 Mbit (512K x 8) EPROM manufactured by STMicroelectronics. It supports both UV erasable and One-Time Programmable (OTP) configurations. The device operates with a 5V ± 10% supply voltage during read operations, featuring an access time of 100ns. Programming requires a 12.75V supply on the VPP pin. It utilizes a parallel interface with 32 pins housed in a PLCC package.

Memory IC Feature Summary

• Supports OTP technology for permanent data storage applications where erasure is not required.
• Features a two-line output control function to minimize power dissipation and prevent bus contention in memory arrays.
• Includes electronic signature mode for automatic identification by programming equipment.

Memory IC Applications

• Microprocessor systems requiring large program storage
• Parallel memory arrays utilizing two-line control functions
• Automated programming equipment matching via electronic signatures

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required speed grade and temperature range. Confirm the package type corresponds to the design requirements. Check for ECOPACK compliance if lead-free specifications are mandatory. Ensure the source document confirms availability status as obsolete products may have limited support.

Memory IC Selection Notes

Select this component when a 4 Mbit capacity with 512K x 8 organization is necessary. Choose the OTP variant if UV erasure capabilities are not needed. Ensure the system design accommodates the 12.75V programming voltage requirement. Verify that the 100ns access time meets the system timing constraints.

Memory IC Part Context

This part belongs to the M27 series of EPROMs from STMicroelectronics. It is available in multiple packages including FDIP, PDIP, PLCC, and TSOP. The device is designed for high-density memory applications in microprocessor systems.

Memory IC Replacement Considerations

Check official documentation for confirmed substitute part numbers within the same family or equivalent specifications. Verify compatibility regarding pinout, voltage levels, and access times before substitution.

Memory IC FAQ

How is the Electronic Signature mode activated?

Apply 11.5V to 12.5V on address line A9 while maintaining VPP and VCC at 5V. Toggle address line A0 to sequence the manufacturer and device codes.

What is the PRESTO II programming algorithm?

It is a programming method that applies a sequence of 100µs program pulses to each byte until a correct verify occurs, ensuring a guaranteed margin without overprogram pulses.