NM27C040V120

Memory IC Overview

The NM27C040V120 is a 4 Mbit (512K x 8) Erasable Programmable Read-Only Memory (EPROM) manufactured by onsemi. It features parallel interface access with a maximum access time of 120 ns. The device operates within a standard single 5 V supply voltage range and draws a working power current of 30 mA. It utilizes a 32-pin PLCC surface-mount package suitable for SMD/SMT installation. The component supports a programming voltage of 12.75 V and functions reliably across an operating temperature range from 0°C to +70°C.

Memory IC Feature Summary

• Provides non-volatile data storage using EPROM technology for persistent memory retention without power.
• Supports high-speed parallel data access with a 120 ns cycle time for efficient system integration.
• Designed for surface-mount assembly in a compact 32-pin PLCC form factor.

Memory IC Applications

• Embedded systems requiring fixed program code storage
• Industrial control units needing reliable non-volatile memory
• Consumer electronics firmware implementation

Memory IC Procurement Notes

Verify the exact suffix designation, as variations may exist between FM27C040V120 and NM27C040V120 designations. Confirm end-of-life status and availability through authorized channels. Ensure compatibility with existing PCB footprints for 32-pin PLCC packages. Check for RoHS compliance requirements specific to your region. Validate that the 120 ns speed grade meets your system timing constraints before ordering.

Memory IC Selection Notes

Select this component when a 512K x 8 word organization is required for embedded applications. Ensure the design accommodates the 5 V logic levels and 12.75 V programming voltage if field reprogramming is needed. Verify that the industrial commercial temperature range of 0°C to +70°C aligns with the operational environment. Consider the PLCC package dimensions for board space allocation.

Memory IC Part Context

This part belongs to the 27C series of EPROMs, a legacy memory technology largely superseded by Flash. The NM prefix typically denotes a specific manufacturer variant or qualification level within the onsemi portfolio. While functionally similar to other 27C040 devices, specific electrical characteristics and pinouts should be verified against official datasheets to ensure interchangeability.

Memory IC Replacement Considerations

Microchip Technology AT27C040-70JU is listed as a similar alternative. Verify pinout compatibility and access time specifications before substitution. Note that the AT27C040-70JU offers faster 70 ns access compared to the 120 ns of the NM27C040V120.