AT49F001N-12JI

Memory IC Overview

The AT49F001N-12JI is a 5-volt only in-system reprogrammable Flash memory manufactured by Microchip Technology. It provides 1 megabit of storage organized as 131,072 words by 8 bits. The device features a fast read access time of 120 ns and operates within the industrial temperature range of -40°C to +85°C. It utilizes a sector architecture including a 16K byte boot block with programming lockout capability, two 8K byte parameter blocks, and two main memory blocks of 32K and 64K bytes respectively. The component supports byte-by-byte programming with typical times of 10 µs per byte and offers hardware data protection mechanisms.

Memory IC Feature Summary

• Sector-based memory organization with dedicated boot block for secure code storage
• Hardware data protection against inadvertent programming via VCC sense and noise filters
• Internal program control and timer for automated erase and program cycles
• DATA polling and toggle bit features for end-of-cycle detection

Memory IC Applications

• In-system reprogrammable non-volatile storage
• Secure boot code implementation
• Parameter data retention
• Industrial embedded systems requiring hardware write protection

Memory IC Procurement Notes

Verify that the ordering suffix corresponds to the specific package type and operating temperature range required for your design. Confirm the manufacturer origin, as this part was originally developed by Atmel before its acquisition by Microchip Technology. Ensure compatibility with 5V logic levels and check for any specific pin configuration differences between variants.

Memory IC Selection Notes

Select this component when a 5V-only operation is required for in-system reprogramming without high voltage generation circuits. Consider the sector architecture if distinct regions for boot code and application data are needed. Evaluate the 120 ns access speed against system timing requirements and ensure the industrial temperature rating meets environmental specifications.

Memory IC Part Context

This device belongs to the AT49F001 family of 5-volt Flash memories. Variants include AT49F001, AT49F001N, AT49F001T, and AT49F001NT, distinguished by package types and specific pin configurations such as don't connect pins or RESET pin availability. The AT49F001N variant specifically lacks the RESET pin functionality found in other family members.

Memory IC Replacement Considerations

AT49F001-12JI

Memory IC FAQ

Does the AT49F001N-12JI have a RESET pin?

No, the AT49F001N variant does not feature a RESET pin. This function is available on the AT49F001T and AT49F001NT variants.

How is the boot block protected from modification?

The boot block can be protected using a software command sequence that enables a programming lockout feature. Once enabled, the block cannot be erased or programmed with input voltages of 5.5V or less.

What methods are available to detect the end of a program cycle?

The device supports DATA polling, where reading the last programmed byte yields its complement during the cycle, and the Toggle Bit feature, where I/O6 toggles until the operation completes.