W25Q64FWZPIF Equivalent & Substitute Parts

Part Overview

The W25Q64FWZPIF is a 64Mbit NOR Flash memory IC featuring SPI and Quad I/O interfaces, designed for embedded storage applications requiring non-volatile memory. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
Memory Size	64Mbit
Memory Organization	8M x 8
Memory Interface	SPI - Quad I/O, QPI
Clock Frequency	104 MHz
Voltage Supply Range	1.65V ~ 1.95V
Operating Temperature	-40°C ~ 85°C
Package Type	8-WDFN Exposed Pad (8-WSON 6x5)
Write Cycle Time (Page)	5ms
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the W25Q64FWZPIF is determined by the following critical parameters:

Memory Capacity: Must be 64Mbit (8M x 8 organization)
Interface Compatibility: Must support SPI with Quad I/O capability
Package Compatibility: Must use 8-WDFN Exposed Pad (8-WSON 6x5) form factor
Voltage Compatibility: Supply voltage range must encompass or be compatible with 1.65V ~ 1.95V
Operating Temperature Range: Must support -40°C ~ 85°C
Compliance: Must maintain ROHS3 compliance and MSL 3 rating

The identified substitute parts meet these core requirements while offering enhanced performance characteristics in clock frequency and write cycle time. Both substitute parts are active products from the same manufacturer (Winbond Electronics) within the SpiFlash® series.

Parameter Comparison

Parameter	W25Q64FWZPIF (Main)	W25Q64JWZPIM (Direct)	W25Q64JWZPIQ (Similar)
Memory Size	64Mbit	64Mbit	64Mbit
Memory Organization	8M x 8	8M x 8	8M x 8
Memory Interface	SPI - Quad I/O, QPI	SPI - Quad I/O	SPI - Quad I/O
Clock Frequency	104 MHz	133 MHz	133 MHz
Voltage Supply Range	1.65V ~ 1.95V	1.7V ~ 1.95V	1.7V ~ 1.95V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-WDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad
Write Cycle Time (Page)	5ms	3ms	3ms
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Both W25Q64JWZPIM and W25Q64JWZPIQ are suitable replacements for the obsolete W25Q64FWZPIF based on electrical and mechanical compatibility. The substitute parts offer improved performance with 133 MHz clock frequency and reduced page write cycle time (3ms versus 5ms), while maintaining identical memory capacity, interface protocol support, and package form factor.

W25Q64JWZPIM is designated as the direct substitute with standard packaging. W25Q64JWZPIQ is functionally equivalent with tube packaging, suitable for high-volume production environments. Both parts maintain ROHS3 compliance and MSL 3 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can W25Q64JWZPIM or W25Q64JWZPIQ be used as direct pin-for-pin replacements?

A: Yes. Both substitute parts use the identical 8-WDFN Exposed Pad package (8-WSON 6x5) with matching pinout and electrical interface specifications.

Q: What is the difference between W25Q64JWZPIM and W25Q64JWZPIQ?

A: The parts are electrically and functionally identical. The primary difference is packaging: W25Q64JWZPIM uses standard packaging, while W25Q64JWZPIQ is supplied in tube packaging for high-volume applications.

Q: Are the voltage supply ranges compatible?

A: The substitute parts operate at 1.7V ~ 1.95V, which overlaps with the original part's 1.65V ~ 1.95V range. The minimum voltage is 50mV higher in the substitutes. System designs operating above 1.7V will experience no compatibility issues.

Q: Do the substitute parts support the same interface protocols?

A: Both substitutes support SPI with Quad I/O interface. The original part additionally supported QPI mode; the substitutes support Quad I/O operation, which covers the primary use cases for this memory class.

Q: What are the compliance and certification implications?

A: All parts maintain ROHS3 compliance and MSL 3 (168 Hours) rating. No additional qualification or testing is required from a regulatory standpoint when transitioning from the obsolete part to either active substitute.

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