AT25DF041A-SSHF-T Equivalent & Substitute Parts

Part Overview

The AT25DF041A-SSHF-T is a 4Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-SOIC package. This part operates at 50 MHz with a supply voltage range of 2.3V to 3.6V and is rated for -40°C to 85°C operating temperature. The product status is obsolete, making substitute parts necessary for new designs and ongoing production requirements.

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 / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Memory Type	Non-Volatile FLASH
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the AT25DF041A-SSHF-T is determined by the following critical parameters:

Memory capacity: 4Mbit (512K x 8 organization)
Interface protocol: SPI
Package type: 8-SOIC form factor
Supply voltage compatibility: 2.3V ~ 3.6V minimum overlap
Operating temperature range: -40°C minimum and 85°C maximum
Mounting type: Surface Mount

Substitute parts must maintain identical memory capacity, organization, and SPI interface. Package compatibility requires 8-SOIC or equivalent footprint. Supply voltage ranges must overlap with the original specification. Operating temperature ranges must support at least -40°C to 85°C operation.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temperature	Package	Product Status	RoHS Status
AT25DF041A-SSHF-T	Renesas	4Mbit	50 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Obsolete	Not Specified
AT25DF041B-SSHN-B	Renesas	4Mbit	104 MHz	1.65V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
AT25DF041B-SSHNHR-T	Renesas	4Mbit	85 MHz	1.7V ~ 3.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
AT25XE041B-SSHN-B	Renesas	4Mbit	85 MHz	1.65V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
AT25XE041B-SSHN-T	Renesas	4Mbit	85 MHz	1.65V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
AT25XE041B-SSHNHR-T	Renesas	4Mbit	85 MHz	1.65V ~ 3.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
LE25U40CMC-AH	onsemi	4Mbit	40 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
W25Q40CLSNIG TR	Winbond	4Mbit	104 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
W25X40CLSNIG TR	Winbond	4Mbit	104 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
W25X40CLSVIG TR	Winbond	4Mbit	104 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-VSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain the 4Mbit capacity and SPI interface required for functional compatibility with the AT25DF041A-SSHF-T. The Renesas AT25DF041B and AT25XE041B series parts are active products with ROHS3 compliance, offering direct pin-compatible replacements in 8-SOIC packaging.

The AT25DF041B-SSHN-B and AT25DF041B-SSHNHR-T provide higher clock frequencies (104 MHz and 85 MHz respectively) while maintaining backward compatibility. The AT25XE041B series offers similar performance characteristics with active product status and full compliance certifications.

The LE25U40CMC-AH from onsemi provides an alternative from a different manufacturer with matching voltage supply range and operating temperature specifications. The Winbond W25Q40CLSNIG TR and W25X40CLSNIG TR parts offer higher clock frequencies with active product status and ROHS3 compliance. The W25X40CLSVIG TR uses an 8-VSOP package variant instead of standard 8-SOIC.

All substitute parts carry ROHS3 compliance and REACH unaffected status, supporting modern manufacturing and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can AT25DF041B-SSHN-B directly replace AT25DF041A-SSHF-T?

A: Yes. Both parts share identical 4Mbit capacity, 512K x 8 organization, SPI interface, and 8-SOIC package. The AT25DF041B-SSHN-B operates at 104 MHz versus 50 MHz and has a lower minimum supply voltage (1.65V vs 2.3V), making it functionally compatible for applications using the original part's voltage range.

Q: What is the difference between AT25DF041B and AT25XE041B series?

A: Both series maintain 4Mbit capacity and SPI interface in 8-SOIC packages. The AT25DF041B series is manufacturer-recommended and verified for DiGi-Electronics programmability. The AT25XE041B series offers similar electrical characteristics with active product status but is not verified for DiGi-Electronics programmability.

Q: Why does W25X40CLSVIG TR have a different package designation?

A: The W25X40CLSVIG TR uses an 8-VSOP package instead of the standard 8-SOIC. While both are surface-mount packages with 0.154" width, the VSOP variant has different pin spacing and footprint. PCB layout compatibility must be verified before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed carry ROHS3 compliance certification. The original AT25DF041A-SSHF-T does not specify RoHS status due to its obsolete product status.

Q: Can I use LE25U40CMC-AH as a substitute if my application requires 104 MHz operation?

A: No. The LE25U40CMC-AH operates at 40 MHz maximum, which is lower than the original 50 MHz specification. Applications requiring higher clock frequencies should use AT25DF041B-SSHN-B, AT25DF041B-SSHNHR-T, or Winbond alternatives operating at 85 MHz or 104 MHz.

Q: What is the significance of the -T and -B suffixes in part numbers?

A: The suffix indicates packaging format. The -T designation indicates Tape & Reel (TR) packaging for automated assembly. The -B designation indicates Tube packaging. Both formats contain identical die and electrical specifications; packaging choice depends on production volume and assembly equipment compatibility.

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