AT25F512B-MAH-T Equivalent & Substitute Parts

Part Overview

The AT25F512B-MAH-T is a 512Kbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation, packaged in 8-UDFN (2x3) with exposed pad. This part operates at 70 MHz clock frequency and is designed for non-volatile data storage applications requiring SPI interface connectivity. The AT25F512B-MAH-T is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives with compatible electrical and mechanical specifications are available from Renesas and other manufacturers.

Key Parameters

Parameter	Value
Memory Size	512Kbit
Memory Organization	64K x 8
Memory Interface	SPI
Clock Frequency	70 MHz
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TC)
Package / Case	8-UFDFN Exposed Pad
Supplier Device Package	8-UDFN (2x3)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the AT25F512B-MAH-T is determined by the following critical parameters:

Memory Capacity: 512Kbit (64K x 8 organization)
Interface Protocol: SPI
Package Type: 8-UDFN (2x3) with exposed pad
Operating Temperature Range: -40°C ~ 85°C
Supply Voltage Compatibility: Minimum 2.7V support required

Substitute parts are grouped into two categories:

Category 1 - Direct Renesas Alternatives (Active Status) Parts AT25BCM512C-MAHF-T, AT25DF512C-MAHN-T, AT25DF512C-MAHNGU-T, AT25DN512C-MAHF-T, AT25DN512C-MAHFGP-T, and AT25XE512C-MAHN-T maintain identical memory capacity, SPI interface, package configuration, and temperature range. These parts are manufactured by Renesas Electronics Corporation and carry active product status with RoHS3 compliance.

Category 2 - Cross-Manufacturer Alternatives Parts SST25VF512A-33-4I-QAE (Microchip Technology) and W25X05CLUXIG TR (Winbond Electronics) provide 512Kbit SPI FLASH memory in compatible packages with equivalent memory organization and operating temperature specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Package	Product Status	RoHS Status
AT25F512B-MAH-T	Renesas	512Kbit	70 MHz	2.7V ~ 3.6V	8-UDFN (2x3)	Obsolete	Not Specified
AT25BCM512C-MAHF-T	Renesas	512Kbit	70 MHz	2.7V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
AT25DF512C-MAHN-T	Renesas	512Kbit	104 MHz	1.65V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
AT25DF512C-MAHNGU-T	Renesas	512Kbit	104 MHz	1.65V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
AT25DN512C-MAHF-T	Renesas	512Kbit	104 MHz	2.3V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
AT25DN512C-MAHFGP-T	Renesas	512Kbit	104 MHz	2.3V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
AT25XE512C-MAHN-T	Renesas	512Kbit	104 MHz	1.65V ~ 3.6V	8-UDFN (2x3)	Active	ROHS3 Compliant
SST25VF512A-33-4I-QAE	Microchip	512Kbit	33 MHz	2.7V ~ 3.6V	8-WSON	Active	ROHS3 Compliant
W25X05CLUXIG TR	Winbond	512Kbit	104 MHz	2.3V ~ 3.6V	8-USON (2x3)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: AT25BCM512C-MAHF-T This Renesas part maintains identical electrical specifications to the AT25F512B-MAH-T (70 MHz clock frequency, 2.7V ~ 3.6V supply range) while offering active product status and RoHS3 compliance. Pin-for-pin compatibility and matching package configuration ensure direct substitution without circuit redesign.

Secondary Recommendations: AT25DF512C-MAHN-T, AT25DN512C-MAHF-T, AT25XE512C-MAHN-T These active Renesas alternatives provide enhanced clock frequency (104 MHz) and extended voltage supply ranges (1.65V minimum for AT25DF512C and AT25XE512C variants; 2.3V minimum for AT25DN512C). All maintain 8-UDFN (2x3) package compatibility and RoHS3 compliance. Selection depends on application requirements for operating voltage and performance headroom.

Cross-Manufacturer Alternatives SST25VF512A-33-4I-QAE (Microchip) operates at reduced clock frequency (33 MHz) in 8-WSON package. W25X05CLUXIG TR (Winbond) provides 104 MHz operation in 8-USON (2x3) package. Both are RoHS3 compliant and active products. Package differences require PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can AT25BCM512C-MAHF-T directly replace AT25F512B-MAH-T without circuit modification? A: Yes. AT25BCM512C-MAHF-T maintains identical clock frequency (70 MHz), supply voltage range (2.7V ~ 3.6V), memory capacity (512Kbit), SPI interface, and 8-UDFN (2x3) package configuration. Direct substitution is supported.

Q: What is the advantage of AT25DF512C-MAHN-T over AT25BCM512C-MAHF-T? A: AT25DF512C-MAHN-T operates at 104 MHz clock frequency compared to 70 MHz, providing performance headroom. It also supports lower minimum supply voltage (1.65V vs. 2.7V). Both maintain identical package and memory organization. Selection depends on application performance and power supply requirements.

Q: Are Microchip SST25VF512A-33-4I-QAE and Winbond W25X05CLUXIG TR suitable substitutes? A: Both provide 512Kbit SPI FLASH memory with compatible memory organization and operating temperature range. However, SST25VF512A-33-4I-QAE operates at 33 MHz (lower than original 70 MHz) in 8-WSON package. W25X05CLUXIG TR operates at 104 MHz in 8-USON (2x3) package. Package differences require PCB layout verification. Use only if performance and mechanical constraints are satisfied.

Q: What is the significance of RoHS3 compliance on substitute parts? A: RoHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. All active substitute parts listed carry RoHS3 certification, supporting regulatory requirements for new designs and production continuity.

Q: Does supply voltage range affect substitution eligibility? A: Yes. The original AT25F512B-MAH-T requires minimum 2.7V supply. Substitute parts with lower minimum voltage (1.65V for AT25DF512C and AT25XE512C) are compatible with 2.7V systems. Parts with higher minimum voltage (2.3V for AT25DN512C) are compatible only if system supply remains above 2.3V. Verify application power supply specifications before selection.

Q: Can I use AT25DF512C-MAHN-T in a design originally specified for AT25F512B-MAH-T? A: Yes, with verification. AT25DF512C-MAHN-T provides enhanced performance (104 MHz vs. 70 MHz) and extended voltage range (1.65V ~ 3.6V vs. 2.7V ~ 3.6V). It maintains identical package and memory organization. Confirm that higher clock frequency does not introduce timing conflicts in your application circuit.

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