AT49LV001NT-90JC

Memory IC Overview

The AT49LV001NT-90JC is a 3-volt-only in-system reprogrammable Flash memory with a capacity of 1 megabit, organized as 128K words by 8 bits. It features a 90 ns access time and operates within a commercial temperature range of 0°C to 70°C. The device utilizes a single power supply of 3.0V to 3.6V for both read and write operations. It is housed in a 32-lead Plastic Thin Small Outline Package (TSOP) measuring 8 x 20 mm.

Memory IC Feature Summary

• Sector architecture includes one 16-Kbyte boot block with programming lockout, two 8-Kbyte parameter blocks, and two main memory blocks.
• Internal program control and timer manage byte-by-byte programming and erase cycles without external clocks.
• Hardware data protection prevents inadvertent programming through VCC sense, program inhibit states, and noise filtering.
• DATA polling and toggle bit features provide detection methods for the completion of program and erase cycles.

Memory IC Applications

• In-system reprogrammable storage for embedded systems
• Secure code storage utilizing the boot block lockout feature
• Parameter storage requiring independent sector erasure

Memory IC Procurement Notes

Verify that the component matches the specific LV voltage range of 3.0V to 3.6V, distinct from the BV variant. Confirm the package type is TSOP-32 and the speed grade is 90 ns. Ensure the suffix JC corresponds to the commercial temperature range of 0°C to 70°C. Cross-reference manufacturer codes to confirm authenticity.

Memory IC Selection Notes

Select this part for applications requiring low-voltage operation and in-system reprogrammability. The 90 ns access time suits moderate-speed parallel interfaces. Consider the sector organization if independent parameter updates are needed. Verify compatibility with 3.3V logic levels and ensure sufficient endurance requirements are met by the typical 10,000 cycle rating.

Memory IC Part Context

This component belongs to the AT49BV/LV001 family of 1-megabit Flash memories manufactured using nonvolatile CMOS technology. It offers fast read access and low power dissipation. The LV designation indicates a 3-volt-only supply requirement, while the NT suffix specifies the TSOP package and N indicates the presence of a RESET pin.

Memory IC Replacement Considerations

AT49LV001NT-70JC

Memory IC FAQ

How is the boot block programming lockout detected?

Enter software product identification mode and read address 1C002H. If I/O0 is high, the lockout is active; if low, it is not.

What is the function of the RESET pin on this device?

A low level on the RESET pin halts device operation and puts outputs in high impedance. Applying 12V allows overriding boot block lockout during erase/program.

How does DATA polling indicate end of program?

During programming, reading the last loaded byte yields the complement of the data. Once complete, true data appears on all outputs.