AT88SC0808CA-SU Equivalent & Substitute Parts

Part Overview

The AT88SC0808CA-SU is a Secure Memory IC manufactured by Microchip Technology, part of the CryptoMemory® series. This 8-SOIC surface mount device is designed for embedded and smart card applications requiring secure memory functionality. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional compatibility through matching memory organization, interface protocols, package specifications, and electrical operating parameters.

Key Parameters

Parameter	AT88SC0808CA-SU
Manufacturer	Microchip Technology
Series	CryptoMemory®
Type	Secure Memory
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Applications	Embedded, Smart Card
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the AT88SC0808CA-SU is determined by the following criteria:

Primary Compatibility Requirements:

Package / Case: 8-SOIC (0.154", 3.90mm Width) or equivalent 8-SOP-J
Mounting Type: Surface Mount
Memory Organization: 1K x 8 (8Kbit total)
Memory Interface: I2C protocol
Memory Format: EEPROM or Secure Memory
RoHS Compliance: ROHS3 Compliant
REACH Status: REACH Unaffected

Secondary Compatibility Factors:

Operating Temperature Range: -40°C to 85°C or wider
Voltage Supply Range: Minimum 1.6V to 5.5V or compatible subset
Write Cycle Time: 5ms (standard for 8Kbit I2C EEPROM)
Moisture Sensitivity: MSL 1 or MSL 3 acceptable for most applications

Substitute parts are grouped into two categories: direct Microchip Technology equivalents (AT88SC0808CA-SH variants) and cross-manufacturer alternatives (Rohm Semiconductor BR24 series and Microchip AT24 series). All listed substitutes maintain electrical and mechanical compatibility within the specified parameters.

Parameter Comparison

Part Number	Manufacturer	Memory Type	Memory Size	Interface	Clock Frequency	Package	Voltage Supply	Operating Temp	Product Status	MSL
AT88SC0808CA-SU	Microchip	Secure Memory	8Kbit	I2C	N/A	8-SOIC	N/A	N/A	Obsolete	1
AT88SC0808CA-SH	Microchip	Secure Memory	8Kbit	I2C	N/A	8-SOIC	N/A	N/A	Active	1
AT88SC0808CA-SH-T	Microchip	Secure Memory	8Kbit	I2C	N/A	8-SOIC	N/A	N/A	Active	1
AT24C08D-SSHM-B	Microchip	EEPROM	8Kbit	I2C	1 MHz	8-SOIC	1.7V ~ 3.6V	-40°C ~ 85°C	Active	3
AT24CS08-SSHM-T	Microchip	EEPROM	8Kbit	I2C	1 MHz	8-SOIC	1.7V ~ 5.5V	-40°C ~ 85°C	Active	1
BR24A08FJ-WME2	Rohm	EEPROM	8Kbit	I2C	400 kHz	8-SOP-J	2.5V ~ 5.5V	-40°C ~ 105°C	Active	1
BR24G08FJ-3AGTE2	Rohm	EEPROM	8Kbit	I2C	1 MHz	8-SOP-J	1.6V ~ 5.5V	-40°C ~ 85°C	Active	1
BR24G08FJ-3GTE2	Rohm	EEPROM	8Kbit	I2C	400 kHz	8-SOP-J	1.6V ~ 5.5V	-40°C ~ 85°C	Active	1
BR24L08FJ-WE2	Rohm	EEPROM	8Kbit	I2C	400 kHz	8-SOP-J	1.8V ~ 5.5V	-40°C ~ 85°C	Active	1
BR24S08FJ-WE2	Rohm	EEPROM	8Kbit	I2C	400 kHz	8-SOP-J	1.7V ~ 5.5V	-40°C ~ 85°C	Active	1
BR24T08FJ-WE2	Rohm	EEPROM	8Kbit	I2C	400 kHz	8-SOP-J	1.6V ~ 5.5V	-40°C ~ 85°C	Active	1

Engineering Selection Recommendations

Direct Microchip Equivalents (Preferred for Secure Memory Applications):

AT88SC0808CA-SH and AT88SC0808CA-SH-T are direct functional equivalents to the obsolete AT88SC0808CA-SU. Both parts maintain the CryptoMemory® series designation, identical 8-SOIC package specifications, and MSL 1 rating. These parts are currently in active production status with substantial inventory availability (2,214 and 5,150 units respectively). The AT88SC0808CA-SH-T variant is supplied in Cut Tape and Digi-Reel® packaging, suitable for automated assembly processes. Selection between these two depends on packaging requirements for manufacturing operations.

Microchip EEPROM Alternatives (Standard Memory Applications):

AT24C08D-SSHM-B and AT24CS08-SSHM-T are Microchip EEPROM devices that provide functional substitution when secure memory features are not required. Both maintain 8Kbit capacity, I2C interface, 8-SOIC package, and -40°C to 85°C operating range. AT24CS08-SSHM-T offers superior voltage supply range (1.7V to 5.5V) and MSL 1 rating, making it suitable for applications with extended supply voltage requirements. AT24C08D-SSHM-B operates at 1.7V to 3.6V with MSL 3 rating, appropriate for lower voltage systems with controlled moisture exposure.

Rohm Semiconductor Cross-Manufacturer Alternatives:

BR24 series EEPROM devices from Rohm Semiconductor provide cross-manufacturer substitution with identical 8Kbit capacity and I2C interface. All BR24 variants use 8-SOP-J packaging (mechanically compatible with 8-SOIC footprints) and maintain ROHS3 compliance and REACH unaffected status. Selection among BR24 variants depends on clock frequency requirements and voltage supply specifications:

BR24A08FJ-WME2: 400 kHz operation, 2.5V to 5.5V supply, automotive grade (AEC-Q100), extended temperature to 105°C
BR24G08FJ-3AGTE2: 1 MHz operation, 1.6V to 5.5V supply
BR24G08FJ-3GTE2: 400 kHz operation, 1.6V to 5.5V supply, highest inventory availability (260,275 units)
BR24L08FJ-WE2: 400 kHz operation, 1.8V to 5.5V supply, DiGi-Electronics programmable verified
BR24S08FJ-WE2: 400 kHz operation, 1.7V to 5.5V supply, DiGi-Electronics programmable verified
BR24T08FJ-WE2: 400 kHz operation, 1.6V to 5.5V supply

All Rohm parts maintain MSL 1 rating and -40°C to 85°C operating temperature range. Selection criteria include voltage supply compatibility with target application, clock frequency requirements, and availability of programmable verification status where required.

Frequently Asked Questions (FAQ)

Q: Can I use an AT24C08D-SSHM-B EEPROM as a direct replacement for the AT88SC0808CA-SU Secure Memory?

A: Functional substitution is possible if the application does not require secure memory features specific to the CryptoMemory® series. Both parts share 8Kbit capacity, I2C interface, 8-SOIC package, and compatible operating parameters. However, the AT24C08D-SSHM-B is standard EEPROM without cryptographic capabilities. If security features are essential, use AT88SC0808CA-SH or AT88SC0808CA-SH-T instead.

Q: What is the difference between 8-SOIC and 8-SOP-J packages?

A: Both packages are mechanically and electrically compatible for this application. 8-SOIC (Small Outline Integrated Circuit) and 8-SOP-J (Small Outline Package-J) have identical 0.154" (3.90mm) width and pin spacing. PCB footprints designed for one package accept the other without modification. Rohm BR24 series uses 8-SOP-J designation while Microchip uses 8-SOIC, but they are interchangeable.

Q: Why do some substitute parts have different clock frequencies (400 kHz vs. 1 MHz)?

A: Clock frequency determines I2C bus speed capability. 400 kHz parts operate at standard I2C speed, while 1 MHz parts support fast I2C mode. Both are compatible with systems designed for standard I2C operation. If your application requires fast I2C mode (1 MHz), select BR24G08FJ-3AGTE2 or AT24CS08-SSHM-T. For standard applications, 400 kHz parts are fully compatible.

Q: What does MSL 1 vs. MSL 3 mean for my application?

A: MSL (Moisture Sensitivity Level) indicates moisture exposure limits during storage and handling. MSL 1 (unlimited) parts have no moisture exposure restrictions and are suitable for all manufacturing environments. MSL 3 (168 hours) parts require controlled moisture exposure and must be stored in dry conditions or desiccant packaging. For most applications, MSL 1 parts (AT88SC0808CA-SH, AT24CS08-SSHM-T, all BR24 variants) are preferred due to handling flexibility.

Q: Is the AT88SC0808CA-SH-T variant better than AT88SC0808CA-SH?

A: Both are functionally identical. The difference is packaging: AT88SC0808CA-SH-T comes in Cut Tape and Digi-Reel® format suitable for automated pick-and-place assembly, while AT88SC0808CA-SH comes in Tube packaging suitable for manual handling or lower-volume assembly. Select based on your manufacturing process requirements.

Q: Can I substitute a Rohm BR24 part for a Microchip AT88SC0808CA-SU in a smart card application?

A: Yes, if the application uses standard I2C protocol without requiring CryptoMemory® security features. All BR24 variants maintain 8Kbit capacity, I2C interface, compatible voltage ranges, and -40°C to 85°C operating temperature. Verify that your PCB layout and firmware support 8-SOP-J package pinout, which is identical to 8-SOIC. For applications requiring cryptographic security, use Microchip AT88SC0808CA-SH instead.

Q: Which substitute part has the best availability?

A: BR24G08FJ-3GTE2 has the highest inventory (260,275 units). For Microchip parts, AT88SC0808CA-SH-T has 5,150 units available. If immediate availability is critical, BR24G08FJ-3GTE2 is the optimal choice, provided your application supports 400 kHz I2C operation and 1.6V to 5.5V supply voltage.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance of the original AT88SC0808CA-SU. This ensures compatibility with regulatory requirements for electronics manufacturing and end-use applications.

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