AT88SC0808CA-TH-T Equivalent & Substitute Parts

Part Overview

The AT88SC0808CA-TH-T is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series, packaged in 8-TSSOP form factor. This component is classified as obsolete product status, making substitute parts necessary for new designs and ongoing production requirements. The part operates as an embedded secure memory solution suitable for smart card applications with surface mount installation.

Due to its obsolete status, equivalent EEPROM memory ICs with compatible electrical and mechanical specifications provide functional alternatives for applications requiring 8Kbit I2C memory storage in 8-TSSOP packaging.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT88SC0808CA-TH-T
Manufacturer	Microchip Technology
Product Type	Secure Memory IC
Memory Size	8Kbit
Memory Organization	1K x 8
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the AT88SC0808CA-TH-T are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Memory Size: 8Kbit (mandatory match)
Memory Organization: 1K x 8 (mandatory match)
Package / Case: 8-TSSOP form factor (mandatory match)
Mounting Type: Surface Mount (mandatory match)
Memory Interface: I2C protocol support
RoHS3 Compliance: Required for regulatory alignment

Secondary Electrical Parameters:

Voltage Supply Range: Must encompass or overlap with application requirements
Operating Temperature Range: Must support intended thermal environment
Clock Frequency: 400 kHz to 1 MHz range acceptable for I2C standard compliance
Write Cycle Time: 4ms to 5ms range acceptable for EEPROM operation

The substitute parts listed are all EEPROM memory ICs from active product lines manufactured by Microchip Technology, Rohm Semiconductor, onsemi, and STMicroelectronics. These parts maintain identical memory capacity, organization, and packaging specifications while offering improved product availability and extended lifecycle support compared to the obsolete AT88SC0808CA-TH-T.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Organization	Memory Interface	Clock Frequency	Package / Case	Voltage Supply	Operating Temperature	Product Status	RoHS Status	MSL
AT88SC0808CA-TH-T	Microchip Technology	8Kbit	1K x 8	Secure Memory	N/A	8-TSSOP	N/A	N/A	Obsolete	ROHS3	3
AT24C08D-XHM-T	Microchip Technology	8Kbit	1K x 8	I2C	1 MHz	8-TSSOP	1.7V ~ 3.6V	-40°C ~ 85°C	Active	ROHS3	3
AT24CS08-XHM-T	Microchip Technology	8Kbit	1K x 8	I2C	1 MHz	8-TSSOP	1.7V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	3
BR24G08FVT-3GE2	Rohm Semiconductor	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	1.6V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	1
BR24L08FVT-WE2	Rohm Semiconductor	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	1
BR24S08FVT-WE2	Rohm Semiconductor	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	1.7V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	1
BR24T08FVT-WE2	Rohm Semiconductor	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	1.6V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	1
CAT24C08YI-GT3	onsemi	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	1.7V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3	1
CAV24C08YE-GT3	onsemi	8Kbit	1K x 8	I2C	400 kHz	8-TSSOP	2.5V ~ 5.5V	-40°C ~ 125°C	Active	ROHS3	1
M24C08-DRDW3TP/K	STMicroelectronics	8Kbit	1K x 8	I2C	1 MHz	8-TSSOP	1.7V ~ 5.5V	-40°C ~ 125°C	Active	ROHS3	1
M24C08-DRDW8TP/K	STMicroelectronics	8Kbit	1K x 8	I2C	1 MHz	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 105°C	Active	ROHS3	1

Engineering Selection Recommendations

Primary Recommendation - Microchip Technology AT24CS08-XHM-T: This part maintains manufacturer continuity with the obsolete AT88SC0808CA-TH-T, both from Microchip Technology. The AT24CS08-XHM-T offers active product status with extended voltage supply range (1.7V ~ 5.5V), supporting broader application requirements. MSL rating of 3 matches the original part specification. Clock frequency of 1 MHz provides enhanced performance over 400 kHz alternatives.

Secondary Recommendation - STMicroelectronics M24C08-DRDW3TP/K: This automotive-qualified part (AEC-Q100) provides extended operating temperature range (-40°C ~ 125°C) suitable for demanding thermal environments. The 1 MHz clock frequency and 450 ns access time deliver superior performance characteristics. MSL rating of 1 indicates improved moisture resistance compared to the original part.

Alternative Recommendation - Rohm Semiconductor BR24L08FVT-WE2: This part offers verified programmability status and MSL rating of 1 (unlimited moisture exposure). The 400 kHz clock frequency operates within I2C standard specifications. Voltage supply range of 1.8V ~ 5.5V accommodates most embedded system requirements.

Selection Criteria by Application:

Industrial/Commercial: AT24CS08-XHM-T or BR24T08FVT-WE2
Automotive: M24C08-DRDW3TP/K or CAV24C08YE-GT3
Extended Temperature: M24C08-DRDW3TP/K or CAV24C08YE-GT3
Cost-Optimized: BR24G08FVT-3GE2 or BR24T08FVT-WE2
High Availability: M24C08-DRDW8TP/K (4003 pcs in stock)

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part specification.

Frequently Asked Questions (FAQ)

Q1: Why is the AT88SC0808CA-TH-T obsolete, and what are the functional differences with substitute parts?

A: The AT88SC0808CA-TH-T is classified as obsolete by Microchip Technology, indicating end-of-life status and unavailability for new orders. The original part is a Secure Memory IC designed for cryptographic applications. The substitute parts listed are standard EEPROM memory ICs with identical 8Kbit capacity and 1K x 8 organization. While the substitute parts do not include the cryptographic security features of the original, they provide equivalent non-volatile memory storage functionality for applications requiring basic I2C EEPROM operation. Applications requiring cryptographic capabilities must evaluate alternative secure memory solutions.

Q2: Are all substitute parts pin-compatible with the AT88SC0808CA-TH-T?

A: All substitute parts share the identical 8-TSSOP package form factor (0.173", 4.40mm Width) and surface mount mounting type. However, pin-level compatibility must be verified against the specific I2C protocol implementation and signal timing requirements of your application. The I2C interface is standardized across all substitute parts, but detailed pinout and timing specifications should be reviewed in each manufacturer's datasheet before PCB layout finalization.

Q3: What is the significance of the MSL (Moisture Sensitivity Level) rating difference between the original part and substitutes?

A: The AT88SC0808CA-TH-T carries MSL rating of 3 (168 hours), indicating moderate moisture sensitivity requiring controlled storage and handling conditions. Most substitute parts carry MSL rating of 1 (unlimited), indicating superior moisture resistance and reduced handling restrictions. MSL rating of 1 provides advantages in manufacturing environments with extended lead times and variable humidity conditions. For applications with stringent moisture control requirements, parts with MSL rating of 1 offer improved reliability margins.

Q4: Which substitute part offers the best performance characteristics?

A: Performance ranking by clock frequency and access time: M24C08-DRDW3TP/K and M24C08-DRDW8TP/K (1 MHz clock, 450 ns access time) provide the highest performance. AT24CS08-XHM-T (1 MHz clock, 550 ns access time) offers comparable performance. Rohm Semiconductor and onsemi parts operate at 400 kHz clock frequency, meeting I2C standard specifications with slightly longer access times (900 ns for onsemi parts). Selection should prioritize application timing requirements rather than maximum performance specifications.

Q5: Are automotive-qualified parts necessary for all applications?

A: Automotive qualification (AEC-Q100) is required only for applications subject to automotive industry standards and extended temperature operation. M24C08-DRDW3TP/K and CAV24C08YE-GT3 carry AEC-Q100 qualification with extended operating temperature ranges (-40°C ~ 125°C). For industrial and commercial applications operating within -40°C ~ 85°C range, non-automotive qualified parts provide equivalent functionality at potentially lower cost. Verify application temperature requirements before selecting automotive-qualified alternatives.

Q6: What voltage supply range should be selected for my application?

A: Voltage supply range selection depends on your system power architecture. Parts with 1.6V ~ 5.5V range (BR24G08FVT-3GE2, BR24T08FVT-WE2) accommodate the broadest range of supply voltages. Parts with 1.7V ~ 5.5V range (AT24CS08-XHM-T, BR24S08FVT-WE2, CAT24C08YI-GT3) support most embedded systems. Parts with 1.8V ~ 5.5V range (BR24L08FVT-WE2, M24C08-DRDW8TP/K) are suitable for 3.3V and 5V logic systems. Verify your system's minimum and maximum supply voltage specifications against the selected part's voltage range to ensure proper operation across all operating conditions.

Q7: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging options?

A: Cut Tape (CT) & Digi-Reel® packaging is suitable for small-volume production, prototyping, and manual assembly operations. Tape & Reel (TR) packaging is optimized for high-volume automated assembly with pick-and-place equipment. Both packaging formats contain identical components; the difference is in the delivery format and handling method. Select packaging based on your production volume and assembly process requirements.

Q8: Can I use multiple substitute parts interchangeably in the same design?

A: Yes, all substitute parts maintain identical memory capacity (8Kbit), organization (1K x 8), package form factor (8-TSSOP), and I2C interface protocol. Interchangeability is supported at the functional level. However, verify that the selected part's voltage supply range, operating temperature range, and clock frequency specifications align with your application requirements. Document the approved substitute parts list in your design specifications to ensure manufacturing consistency and supply chain flexibility.

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