AT88SC0404CA-PU Equivalent & Substitute Parts

Part Overview

The AT88SC0404CA-PU is a Secure Memory IC manufactured by Microchip Technology, designed for embedded and smart card applications. This 8-PDIP through-hole component operates as a CryptoMemory® device and is classified as obsolete. Due to its discontinued status, equivalent substitute parts are necessary for ongoing system support and new design implementations. Substitute components must maintain compatibility with the original 8-DIP package and I2C interface specifications while meeting current product availability requirements.

Substiute Parts

AT88SC0404CA-PU

Microchip TechnologyIn Stock: 5007AT88SC0404CA-PU Datasheet

Current PartRFQ

AT24C04D-PUM

Microchip TechnologyIn Stock: 1386AT24C04D-PUM Datasheet

MFR RecommendedRFQ

AT24HC04B-PU

Microchip TechnologyIn Stock: 3693AT24HC04B-PU Datasheet

MFR RecommendedRFQ

BR24L04-W

Rohm SemiconductorIn Stock: 1326BR24L04-W Datasheet

MFR RecommendedRFQ

FT24C04A-UDR-B

Fremont Micro Devices LtdIn Stock: 7192FT24C04A-UDR-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT88SC0404CA-PU is based on the following critical parameters:

Package Compatibility: All substitute parts maintain the 8-DIP (0.300", 7.62mm) through-hole package format, ensuring mechanical and pin-level compatibility with existing PCB layouts.

Memory Interface: All substitutes utilize I2C interface protocol, maintaining communication compatibility with host systems designed for the original part.

Memory Organization: All substitutes provide 512 x 8 memory organization, ensuring data structure compatibility.

Compliance Standards: All substitutes maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

Product Status: Substitute parts are classified as Active, ensuring long-term availability and supply chain reliability.

Mounting Type: All substitutes are through-hole mounted components, compatible with existing assembly processes.

The primary functional difference between the main part and substitutes is the transition from Secure Memory (CryptoMemory®) technology to standard EEPROM technology. This represents a functional downgrade in security features but maintains core memory access and I2C communication capabilities.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Microchip Technology):

AT24C04D-PUM and AT24HC04B-PU are manufacturer-recommended substitutes from Microchip Technology. Both maintain active product status and ROHS3 compliance. AT24C04D-PUM operates at 1.7V to 3.6V supply voltage with 450 ns access time. AT24HC04B-PU provides extended voltage range (1.8V to 5.5V) with 550 ns access time, offering broader system compatibility.

Alternative Substitute (Rohm Semiconductor):

BR24L04-W provides equivalent functionality with active product status and ROHS3 compliance. This part operates at 400 kHz clock frequency compared to 1 MHz for Microchip alternatives, resulting in lower speed performance but maintaining 5ms write cycle time and extended voltage range (1.8V to 5.5V).

Alternative Substitute (Fremont Micro Devices Ltd):

FT24C04A-UDR-B offers active product status with 1 MHz clock frequency and extended voltage range (1.8V to 5.5V). This part provides performance characteristics aligned with AT24HC04B-PU while sourced from an alternative manufacturer.

Selection Criteria:

Choose AT24HC04B-PU or FT24C04A-UDR-B for systems requiring extended voltage range (1.8V to 5.5V) and 1 MHz operation. Select AT24C04D-PUM for systems operating within 1.7V to 3.6V range with faster 450 ns access time requirement. Select BR24L04-W for applications where 400 kHz clock frequency is acceptable and extended voltage range is required.

All substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new designs and legacy system support.

Frequently Asked Questions (FAQ)

Q: Can AT24C04D-PUM directly replace AT88SC0404CA-PU in existing designs?

A: AT24C04D-PUM provides pin-compatible replacement in 8-DIP package with I2C interface. However, the voltage supply range differs (1.7V to 3.6V versus unspecified for original part). Verify system voltage compatibility before substitution.

Q: What is the functional difference between the original AT88SC0404CA-PU and substitute EEPROM parts?

A: The original part is a Secure Memory (CryptoMemory®) device with integrated security features. Substitute parts are standard EEPROM devices without security functionality. Both provide 4Kbit capacity with I2C interface and 512 x 8 organization.

Q: Are all substitute parts available in the same 8-DIP package?

A: All substitute parts are available in 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts.

Q: Which substitute offers the fastest access time?

A: AT24C04D-PUM provides 450 ns access time, the fastest among substitutes. AT24HC04B-PU and FT24C04A-UDR-B both provide 550 ns access time. BR24L04-W does not specify access time.

Q: What voltage ranges do the substitute parts support?

A: AT24C04D-PUM supports 1.7V to 3.6V. AT24HC04B-PU, BR24L04-W, and FT24C04A-UDR-B all support extended range 1.8V to 5.5V.

Q: Do all substitutes meet current compliance standards?

A: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the clock frequency difference between substitutes?

A: AT24C04D-PUM, AT24HC04B-PU, and FT24C04A-UDR-B operate at 1 MHz. BR24L04-W operates at 400 kHz, providing lower speed performance.

Q: Are substitute parts classified as active products?

A: All substitute parts are classified as Active, ensuring long-term availability and supply chain reliability compared to the obsolete original part.