AT25080BN-SH-T EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT25080BN-SH-T is an 8Kbit SPI EEPROM memory IC manufactured by Microchip Technology, operating at 20 MHz with a supply voltage range of 1.8V to 5.5V. This component is classified as obsolete product status. Due to its obsolete designation, identifying functionally equivalent active alternatives is essential for ongoing design support, production continuity, and long-term component availability. Substitute parts must maintain compatibility across memory capacity, interface protocol, package type, and electrical operating parameters.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Interface	SPI
Clock Frequency	20 MHz
Voltage Supply Range	1.8V ~ 5.5V
Write Cycle Time	5ms
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT25080BN-SH-T is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory capacity: 8Kbit (1K x 8 organization)
Interface protocol: SPI
Package: 8-SOIC form factor
Supply voltage range: Must encompass or match 1.8V ~ 5.5V
Operating temperature: Must support -40°C ~ 85°C minimum
RoHS compliance: ROHS3 Compliant

Secondary Consideration:

Clock frequency: The AT25080BN-SH-T operates at 20 MHz. Substitute parts operating at lower clock frequencies (1 MHz, 2 MHz, 10 MHz) remain functionally compatible in applications not requiring maximum speed performance, as SPI interfaces operate synchronously with the host controller clock.

All identified substitute parts meet the primary compatibility criteria. Variations in clock frequency and voltage supply upper limits do not prevent functional substitution when application requirements are within the substitute part's specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temp	Package	Product Status
AT25080BN-SH-T	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete
25AA080A-I/SN	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA080AT-I/SN	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA080BT-I/SN	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA080CT-I/SN	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA080DT-I/SN	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA080T-I/SN	Microchip Technology	8Kbit	1 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25LC080B-E/SN	Microchip Technology	8Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
25LC080BT-E/SN	Microchip Technology	8Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
25LC080T-I/SN	Microchip Technology	8Kbit	2 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
AT25080B-SSHL-T	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: AT25080B-SSHL-T

The AT25080B-SSHL-T is the optimal direct replacement for the AT25080BN-SH-T. Both parts share identical electrical specifications: 8Kbit capacity, 20 MHz clock frequency, 1.8V to 5.5V supply voltage range, and -40°C to 85°C operating temperature. The AT25080B-SSHL-T maintains active product status with verified DiGi-Electronics programmability and ROHS3 compliance. Inventory availability is substantial at 101,475 units. This part requires no design modifications and provides seamless functional compatibility.

Secondary Recommendations: 25AA080 Series (10 MHz variants)

The 25AA080A-I/SN, 25AA080AT-I/SN, 25AA080BT-I/SN, 25AA080CT-I/SN, and 25AA080DT-I/SN are functionally compatible alternatives. These parts operate at 10 MHz, which is lower than the original 20 MHz specification but maintains full SPI protocol compatibility. All variants share identical voltage supply range (1.8V ~ 5.5V) and operating temperature (-40°C ~ 85°C). Selection among these variants depends on packaging requirements: tube packaging (25AA080A-I/SN), tape and reel (25AA080AT-I/SN, 25AA080BT-I/SN, 25AA080CT-I/SN, 25AA080DT-I/SN). These parts are suitable for applications where maximum clock frequency is not a limiting design constraint.

Tertiary Recommendations: 25LC080 Series

The 25LC080B-E/SN, 25LC080BT-E/SN, and 25LC080T-I/SN operate at reduced clock frequencies (10 MHz and 2 MHz respectively) with a minimum supply voltage of 2.5V. These parts are compatible only in applications where the 1.8V lower supply limit of the original part is not required. The 25LC080 series supports extended operating temperature to 125°C, providing thermal margin beyond the original specification.

Lowest Clock Frequency Option: 25AA080T-I/SN

The 25AA080T-I/SN operates at 1 MHz and maintains full voltage and temperature compatibility with the original part. This variant is suitable for low-speed applications and offers the highest inventory availability at 10,400 units.

All recommended substitutes maintain ROHS3 compliance and RoHS unaffected REACH status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 10 MHz substitute part in place of the 20 MHz AT25080BN-SH-T?

A: Yes. SPI EEPROM interfaces operate synchronously with the host controller's clock signal. The substitute part's maximum clock frequency specification indicates the highest speed at which it can operate reliably. If your application clock is 10 MHz or lower, a 10 MHz rated part functions identically to a 20 MHz part. No design changes are required.

Q: What is the difference between the 25AA080 and 25LC080 series?

A: The primary difference is the minimum supply voltage. The 25AA080 series operates from 1.8V minimum, while the 25LC080 series requires 2.5V minimum. If your design uses 1.8V or 2.0V supply rails, select from the 25AA080 series. The 25LC080 series offers extended operating temperature to 125°C, beneficial for high-temperature applications.

Q: Are all substitute parts available in the same package as the original?

A: Yes. All substitute parts listed use the 8-SOIC (0.154", 3.90mm Width) package, identical to the original AT25080BN-SH-T. Packaging format varies (tube, tape and reel, cut tape), but the physical component package remains consistent. Verify your procurement requirements for packaging format preference.

Q: Is the AT25080B-SSHL-T a direct pin-for-pin replacement?

A: Yes. The AT25080B-SSHL-T is a direct replacement with identical pinout, package, and electrical specifications. No PCB modifications or firmware changes are necessary. This part is the recommended substitute for new designs and production transitions.

Q: Do all substitute parts have the same write cycle time?

A: Yes. All listed substitute parts maintain a 5ms write cycle time, identical to the original AT25080BN-SH-T. Memory write performance is consistent across all alternatives.

Q: Which substitute part has the highest inventory availability?

A: The AT25080B-SSHL-T offers the highest inventory at 101,475 units, followed by 25AA080BT-I/SN at 10,300 units and 25AA080T-I/SN at 10,400 units. For immediate procurement needs, these three parts provide the best supply assurance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and RoHS unaffected per REACH regulations, matching the compliance status of the original AT25080BN-SH-T.

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