AT88SC0404CA-Y6H-T Equivalent & Substitute Parts

Part Overview

The AT88SC0404CA-Y6H-T is a Secure Memory IC manufactured by Microchip Technology, classified as CryptoMemory® series secure memory for embedded and smart card applications. This 8-Mini Map (2x3) surface mount device provides 4Kbit secure memory storage with I2C interface capability. The part is currently in Active product status with 981 pieces in new original stock inventory.

Substitute parts are necessary when the AT88SC0404CA-Y6H-T experiences supply constraints, extended lead times, or when design requirements permit functional equivalents that meet the same electrical and mechanical specifications. All substitute parts listed maintain compatibility with the 8-UFDFN Exposed Pad package format and operate within the same temperature range (-40°C to 85°C).

Substiute Parts

AT88SC0404CA-Y6H-T

Microchip TechnologyIn Stock: 1034AT88SC0404CA-Y6H-T Datasheet

Current PartRFQ

AT24C04D-MAHM-T

Microchip TechnologyIn Stock: 15325AT24C04D-MAHM-T Datasheet

MFR RecommendedRFQ

AT24CS04-MAHM-T

Microchip TechnologyIn Stock: 6202AT24CS04-MAHM-T Datasheet

MFR RecommendedRFQ

BR24G04NUX-3TTR

Rohm SemiconductorIn Stock: 15352BR24G04NUX-3TTR Datasheet

MFR RecommendedRFQ

BR24T04NUX-WTR

Rohm SemiconductorIn Stock: 4839BR24T04NUX-WTR Datasheet

MFR RecommendedRFQ

CAT24C04HU4I-GT3

onsemiIn Stock: 18772CAT24C04HU4I-GT3 Datasheet

MFR RecommendedRFQ

M24C04-FMC6TG

STMicroelectronicsIn Stock: 2352M24C04-FMC6TG Datasheet

MFR RecommendedRFQ

M24C04-RMC6TG

STMicroelectronicsIn Stock: 5228M24C04-RMC6TG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT88SC0404CA-Y6H-T is determined by the following critical parameters:

Primary Compatibility Criteria:

• Memory Size: 4Kbit (512 x 8 organization)
• Memory Interface: I2C protocol
• Package / Case: 8-UFDFN Exposed Pad
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C (TA)
• RoHS3 Compliance
• REACH Unaffected status

All substitute parts listed meet these core electrical and mechanical requirements. Variations in clock frequency, access time, voltage supply range, and MSL rating do not preclude substitution when the application requirements fall within the substitute part's specifications. The substitute parts transition from Secure Memory technology to standard EEPROM technology; however, both memory types provide equivalent 4Kbit I2C-based non-volatile storage functionality for applications where security-specific features are not required.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are Active product status devices with ROHS3 compliance and REACH Unaffected certification, matching the regulatory and compliance profile of the AT88SC0404CA-Y6H-T.

Microchip Technology Substitutes (AT24C04D-MAHM-T, AT24CS04-MAHM-T): These parts maintain manufacturer continuity with Microchip Technology. AT24C04D-MAHM-T offers the fastest access time (450 ns) and lowest MSL rating (1 - Unlimited), suitable for applications with stringent moisture handling requirements. AT24CS04-MAHM-T provides extended voltage supply range (1.7V ~ 5.5V) with MSL rating matching the original part (3 - 168 Hours).

Rohm Semiconductor Substitutes (BR24G04NUX-3TTR, BR24T04NUX-WTR): Both Rohm parts operate at 400 kHz clock frequency with MSL rating of 1 (Unlimited) and voltage supply range of 1.6V ~ 5.5V. BR24G04NUX-3TTR and BR24T04NUX-WTR are functionally equivalent with identical electrical specifications.

onsemi Substitute (CAT24C04HU4I-GT3): This part provides 400 kHz operation, 900 ns access time, and MSL rating of 1 (Unlimited). Voltage supply range extends to 1.7V ~ 5.5V, supporting broader power supply configurations.

STMicroelectronics Substitutes (M24C04-FMC6TG, M24C04-RMC6TG): Both STMicroelectronics parts operate at 400 kHz with 900 ns access time and MSL rating of 1 (Unlimited). M24C04-RMC6TG specifies minimum voltage of 1.8V, while M24C04-FMC6TG supports 1.7V minimum, providing flexibility for different power supply architectures.

Selection among substitute parts should be based on application-specific requirements for clock frequency, access time, voltage supply range, and moisture sensitivity handling. All parts maintain electrical and mechanical compatibility with the original AT88SC0404CA-Y6H-T specification.

Frequently Asked Questions (FAQ)

Q: Can AT24C04D-MAHM-T directly replace AT88SC0404CA-Y6H-T in production?

A: AT24C04D-MAHM-T meets all core electrical and mechanical compatibility requirements: 4Kbit memory size, 512 x 8 organization, I2C interface, 8-UFDFN Exposed Pad package, -40°C to 85°C operating temperature, ROHS3 compliance, and REACH Unaffected status. The primary functional difference is the transition from Secure Memory to standard EEPROM technology. Substitution is valid when security-specific features are not required by the application.

Q: What is the difference between 1 MHz and 400 kHz clock frequency options?

A: Clock frequency determines the maximum I2C bus speed. AT24C04D-MAHM-T and AT24CS04-MAHM-T support 1 MHz operation, enabling faster data transfer rates. BR24G04NUX-3TTR, BR24T04NUX-WTR, CAT24C04HU4I-GT3, M24C04-FMC6TG, and M24C04-RMC6TG operate at 400 kHz. Selection depends on system I2C bus speed requirements. Both frequencies are compatible with standard I2C protocol implementations.

Q: How does MSL rating affect part selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture at specified temperature and humidity conditions before soldering. AT88SC0404CA-Y6H-T and AT24CS04-MAHM-T have MSL 3 (168 Hours), requiring controlled storage and handling. All other substitute parts have MSL 1 (Unlimited), eliminating moisture-related storage constraints. Selection should align with manufacturing process capabilities and storage environment conditions.

Q: Are the 8-Mini Map, 8-UDFN, 8-UDFN-EP, VSON008X2030, and 8-UFDFPN packages mechanically compatible?

A: All listed packages are classified as 8-UFDFN Exposed Pad with 2x3 mm footprint dimensions. While supplier device package designations differ by manufacturer (8-Mini Map, 8-UDFN, 8-UDFN-EP, VSON008X2030, 8-UFDFPN), they represent equivalent physical and electrical package standards. PCB footprint design should accommodate the specific supplier device package designation to ensure proper solder joint formation and thermal performance.

Q: What voltage supply range should be selected for the substitute part?

A: The original AT88SC0404CA-Y6H-T does not specify voltage supply range in the provided data. Substitute parts offer ranges from 1.6V to 5.5V. Selection should be based on system power supply specifications. AT24C04D-MAHM-T (1.7V ~ 3.6V) is suitable for low-voltage applications. AT24CS04-MAHM-T, CAT24C04HU4I-GT3, M24C04-FMC6TG, BR24G04NUX-3TTR, and BR24T04NUX-WTR support extended ranges (1.6V ~ 5.5V or 1.7V ~ 5.5V), accommodating both low-voltage and standard 5V systems.

Q: What is the significance of access time specifications (450 ns, 550 ns, 900 ns)?

A: Access time represents the delay between I2C read command initiation and data availability. Faster access times (450 ns for AT24C04D-MAHM-T) enable quicker data retrieval in time-sensitive applications. Slower access times (900 ns for CAT24C04HU4I-GT3, M24C04-FMC6TG, M24C04-RMC6TG) are acceptable for applications without strict timing constraints. All specified access times are compatible with standard I2C protocol timing requirements.

Q: Is inventory availability a factor in substitute part selection?

A: Inventory levels vary significantly among substitute parts. CAT24C04HU4I-GT3 has the highest inventory (18,676 pcs), followed by BR24G04NUX-3TTR (15,283 pcs) and AT24C04D-MAHM-T (15,300 pcs). Availability should be considered for supply chain continuity and lead time requirements, particularly for high-volume production schedules.