M25P40-VMP6G Equivalent & Substitute Parts

Part Overview

The M25P40-VMP6G is a 4Mbit NOR Flash memory IC manufactured by Micron Technology Inc., featuring SPI interface operation at 50 MHz with 8-VDFPN packaging. This part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. The device operates across a supply voltage range of 2.3V to 3.6V and supports industrial temperature ranges from -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Organization	512K x 8
Memory Interface	SPI
Clock Frequency	50 MHz
Voltage Supply Range	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-VDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the M25P40-VMP6G is determined by the following core parameters:

Memory capacity: 4Mbit (512K x 8 organization)
Interface protocol: SPI
Supply voltage compatibility: 2.3V ~ 3.6V minimum overlap
Operating temperature range: -40°C ~ 85°C
Package footprint: 8-pin WSON/WDFN with 6x5mm dimensions
Compliance standards: ROHS3 and REACH requirements

Substitute parts must maintain compatibility across all these parameters. Clock frequency variations are acceptable provided the substitute operates at or above the minimum 50 MHz requirement. Package designations (VDFN vs. WSON) are functionally equivalent for this application due to identical pin configurations and thermal characteristics.

Parameter Comparison

Parameter	M25P40-VMP6G (Micron)	MX25L4006EZNI-12G (Macronix)	SST25VF040B-50-4I-QAE (Microchip)	SST25VF040B-50-4I-QAE-T (Microchip)	W25X40CLZPIG (Winbond)
Memory Size	4Mbit	4Mbit	4Mbit	4Mbit	4Mbit
Memory Organization	512K x 8	512K x 8	512K x 8	512K x 8	512K x 8
Memory Interface	SPI	SPI	SPI	SPI	SPI
Clock Frequency	50 MHz	86 MHz	50 MHz	50 MHz	104 MHz
Voltage Supply Range	2.3V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-VDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain full compatibility with the M25P40-VMP6G across critical electrical and mechanical parameters. Selection among substitutes should be based on the following factors:

Product Availability and Supply Chain: The Macronix MX25L4006EZNI-12G, Microchip SST25VF040B series, and Winbond W25X40CLZPIG are all classified as active products with established supply channels, providing long-term availability advantages over the obsolete M25P40-VMP6G.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original component.

Moisture Sensitivity Considerations: The Microchip SST25VF040B variants offer superior moisture handling with MSL 1 (unlimited) rating compared to MSL 3 (168 hours) for the original and most alternatives. This provides extended shelf life and reduced handling constraints during assembly operations.

Clock Frequency Performance: The Macronix MX25L4006EZNI-12G (86 MHz) and Winbond W25X40CLZPIG (104 MHz) provide higher clock frequency operation than the original 50 MHz specification, enabling enhanced performance in timing-critical applications while maintaining backward compatibility.

Packaging Format: Microchip SST25VF040B-50-4I-QAE-T is supplied in Tape & Reel format, optimizing for high-volume automated assembly. The tube-packaged variants (SST25VF040B-50-4I-QAE, W25X40CLZPIG, MX25L4006EZNI-12G) are suitable for lower-volume or manual assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the MX25L4006EZNI-12G operate at the original 50 MHz clock frequency? A: Yes. The MX25L4006EZNI-12G operates at 86 MHz, which exceeds the 50 MHz requirement. SPI devices operate at or below their maximum specified frequency, allowing full compatibility with 50 MHz system designs.

Q: What is the significance of the MSL 1 rating on Microchip parts? A: MSL 1 (Unlimited) indicates the component has no moisture absorption limitations and does not require baking before reflow soldering. MSL 3 (168 Hours) components must be used within 168 hours of package opening or require thermal reconditioning. This affects handling procedures and inventory management.

Q: Are the 8-VDFN and 8-WDFN packages pin-compatible? A: Yes. Both packages are 8-pin configurations with identical pin assignments and 6x5mm footprints. The functional difference between VDFN and WSON designations does not affect electrical or mechanical compatibility in this application.

Q: Which substitute offers the best long-term availability? A: All substitute parts are classified as active products. Macronix, Microchip, and Winbond maintain established production and distribution networks. Selection should be based on your supply chain relationships and inventory management preferences.

Q: Is the higher clock frequency of the W25X40CLZPIG (104 MHz) beneficial for 50 MHz applications? A: Higher clock frequency capability provides design flexibility for future upgrades or performance optimization. For existing 50 MHz designs, the W25X40CLZPIG operates identically to the original M25P40-VMP6G at that frequency.

Q: Do all substitutes support the full 2.3V to 3.6V supply range? A: The Macronix and Microchip parts specify 2.7V minimum, while the original and Winbond parts support 2.3V minimum. For applications requiring 2.3V operation, use the M25P40-VMP6G or W25X40CLZPIG.

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