M25P64-VMF6P Equivalent & Substitute Parts

Part Overview

The M25P64-VMF6P is a 64Mbit NOR Flash memory IC with SPI interface manufactured by Micron Technology Inc. This device is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. The part operates at 50 MHz with a supply voltage range of 2.7V to 3.6V and is packaged in a 16-SOIC form factor suitable for surface mount assembly.

Key Parameters

Parameter	Value
Memory Size	64Mbit
Memory Organization	8M x 8
Memory Interface	SPI
Clock Frequency	50 MHz
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Write Cycle Time (Page)	5ms
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the M25P64-VMF6P is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 64Mbit (exact match required for pin-compatible operation)
Memory Organization: 8M x 8 (address and data bus configuration)
Package / Case: 16-SOIC form factor (mechanical and electrical pin compatibility)
Voltage Supply Range: 2.7V ~ 3.6V (power supply compatibility)
Operating Temperature: -40°C ~ 85°C (thermal envelope)

Secondary Performance Parameters:

Memory Interface: SPI or SPI - Quad I/O (backward compatible; Quad I/O extends functionality)
Clock Frequency: 50 MHz or higher (performance enhancement acceptable)
RoHS Status: ROHS3 Compliant (regulatory requirement)
MSL Rating: 3 (168 Hours) (moisture handling compatibility)

Substitutes meeting these criteria maintain functional equivalence while potentially offering improved performance characteristics such as higher clock frequencies or enhanced interface capabilities.

Parameter Comparison

Parameter	M25P64-VMF6P	MT25QL128ABA8ESF-0SIT	MX25L6406EMI-12G	MX25L6445EMI-10G	W25Q64JVSFIQ
Manufacturer	Micron Technology Inc.	Micron Technology Inc.	Macronix	Macronix	Winbond Electronics
Memory Size	64Mbit	128Mbit	64Mbit	64Mbit	64Mbit
Memory Organization	8M x 8	16M x 8	8M x 8	8M x 8	8M x 8
Memory Interface	SPI	SPI - Quad I/O	SPI	SPI	SPI - Quad I/O
Clock Frequency	50 MHz	133 MHz	86 MHz	104 MHz	133 MHz
Voltage Supply Range	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 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 / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Write Cycle Time (Page)	5ms	2.8ms	5ms	5ms	3ms
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

MT25QL128ABA8ESF-0SIT (Micron Technology Inc.)

This part offers the highest performance profile with 128Mbit capacity, 133 MHz clock frequency, and Quad I/O interface capability. Product status is Active, ensuring long-term availability and supply chain stability. The doubled memory capacity provides design flexibility for future feature expansion. Compliance certifications match the original specification. Selection is appropriate for new designs and production transitions where memory capacity upgrade is acceptable.

W25Q64JVSFIQ (Winbond Electronics)

This part maintains exact 64Mbit capacity and 8M x 8 organization, ensuring direct functional equivalence. Product status is Active with verified programmability. The Quad I/O interface and 133 MHz clock frequency provide performance enhancement over the original specification while maintaining backward compatibility with standard SPI operation. Compliance certifications are equivalent. Selection is appropriate for direct replacement in existing designs with minimal firmware modification.

MX25L6445EMI-10G (Macronix)

This part provides exact 64Mbit capacity and 8M x 8 organization with 104 MHz clock frequency. Programmability is verified. Product status is Not For New Designs, indicating limited future availability. Selection is suitable for maintenance and repair of existing systems where component availability remains adequate.

MX25L6406EMI-12G (Macronix)

This part provides exact 64Mbit capacity and 8M x 8 organization with 86 MHz clock frequency. Programmability is verified. Product status is Not For New Designs, indicating limited future availability. Selection is suitable for maintenance and repair of existing systems where component availability remains adequate.

Frequently Asked Questions (FAQ)

Q: Can MT25QL128ABA8ESF-0SIT be used as a direct replacement despite having 128Mbit capacity instead of 64Mbit?

A: Yes. The 128Mbit capacity is backward compatible with 64Mbit designs. The device uses the same 16-SOIC package, identical pin configuration, and compatible SPI interface. Firmware requires no modification for basic operation. The additional memory capacity remains unused in applications designed for 64Mbit devices.

Q: What is the difference between SPI and SPI - Quad I/O interfaces?

A: SPI - Quad I/O devices support both standard SPI operation and enhanced Quad I/O mode for higher data throughput. Devices with Quad I/O capability operate in standard SPI mode when Quad I/O commands are not issued, ensuring compatibility with existing firmware. Firmware modification is required to utilize Quad I/O performance benefits.

Q: Why is MT25QL128ABA8ESF-0SIT recommended over the Macronix alternatives?

A: MT25QL128ABA8ESF-0SIT has Active product status, ensuring long-term availability and supply chain support. The Macronix alternatives carry Not For New Designs status, indicating limited future availability and potential supply constraints. For new production and long-term support requirements, Active status parts are preferred.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, matching the original M25P64-VMF6P specification. All parts are also REACH Unaffected and carry identical ECCN and HTSUS classifications.

Q: What is the MSL rating and why is it important?

A: MSL (Moisture Sensitivity Level) 3 indicates the part can be exposed to moisture for up to 168 hours before soldering. All substitute parts carry identical MSL 3 rating, ensuring equivalent handling and storage requirements. This parameter is critical for supply chain management and assembly process planning.

Q: Can firmware developed for M25P64-VMF6P operate on W25Q64JVSFIQ without modification?

A: Yes. W25Q64JVSFIQ maintains identical memory organization (8M x 8), package configuration, and standard SPI command set compatibility. Existing firmware operates without modification. The Quad I/O capability is an optional enhancement that requires explicit firmware commands to activate.

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