AT88SC0104CA-TH-T Equivalent & Substitute Parts

Part Overview

The AT88SC0104CA-TH-T is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series. This device is classified as obsolete and operates as an 8-TSSOP surface-mount secure memory component designed for embedded and smart card applications. Due to its obsolete product status, equivalent and substitute parts from active product lines are necessary for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	AT88SC0104CA-TH-T
Product Type	Secure Memory
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	5A992C
HTSUS Code	8542.32.0051

Substitute Part Grouping Explanation

Substitution for the AT88SC0104CA-TH-T is based on the following critical parameters that must align for functional compatibility:

Primary Substitution Criteria:

Package / Case: 8-TSSOP (0.173", 4.40mm Width) — identical physical footprint required
Mounting Type: Surface Mount — consistent assembly process
Memory Interface: I2C protocol support
Memory Size: 1Kbit (128 x 8 organization)
Memory Format: EEPROM or equivalent non-volatile memory
Voltage Supply Range: Compatibility with 1.7V to 5.5V operation
Operating Temperature: -40°C to 85°C minimum range
RoHS3 Compliance: Environmental and regulatory alignment
REACH Unaffected Status: Supply chain compliance

The substitute parts listed are all Microchip Technology EEPROM memory devices that share identical package geometry, mounting characteristics, and core memory specifications. These parts transition from the obsolete secure memory architecture to active EEPROM product lines while maintaining electrical and mechanical compatibility.

Parameter Comparison

Parameter	AT88SC0104CA-TH-T	24AA01-I/ST	24AA014-I/ST	24AA014H-I/ST	24AA014HT-I/ST	24AA014T-I/ST	24AA01H-I/ST	24AA01HT-I/ST	24AA01T-I/ST	24LC014-E/ST	24LC014-I/ST
Manufacturer	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip
Memory Type	Secure Memory	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	—	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	—	3500 ns	900 ns	900 ns	900 ns	900 ns	900 ns	900 ns	3500 ns	900 ns	900 ns
Write Cycle Time	—	5ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms
Voltage Supply Range	—	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	—	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	5A992C	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
HTSUS Code	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051	8542.32.0051

Engineering Selection Recommendations

Primary Substitute Selection:

The 24AA014-I/ST, 24AA014H-I/ST, 24AA014HT-I/ST, and 24AA014T-I/ST represent the most direct functional equivalents to the AT88SC0104CA-TH-T. These parts maintain identical 8-TSSOP package geometry, 1Kbit memory capacity with 128 x 8 organization, I2C interface protocol, and surface-mount assembly compatibility. All substitute parts carry Active product status, ensuring long-term availability and supply chain stability. All listed substitutes are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Packaging Variants:

The substitute parts are available in multiple packaging configurations:

Tube packaging: 24AA014-I/ST, 24AA014H-I/ST, 24AA01H-I/ST, 24LC014-E/ST
Tape & Reel (TR): 24AA014T-I/ST, 24AA01HT-I/ST, 24AA01T-I/ST
Standard packaging: 24AA01-I/ST, 24AA014HT-I/ST, 24LC014-I/ST

Selection should align with production assembly requirements and inventory management protocols.

Voltage and Temperature Considerations:

The 24AA01 series (24AA01-I/ST, 24AA01H-I/ST, 24AA01HT-I/ST, 24AA01T-I/ST) operates across 1.7V to 5.5V supply range with -40°C to 85°C temperature rating. The 24LC014 series (24LC014-E/ST, 24LC014-I/ST) operates across 2.5V to 5.5V supply range, with 24LC014-E/ST supporting extended temperature operation to 125°C. Selection depends on specific application voltage and thermal requirements.

Access Time Variants:

Two access time specifications are available: 3500 ns (24AA01-I/ST, 24AA01T-I/ST) and 900 ns (all 24AA014 variants, 24AA01H-I/ST, 24AA01HT-I/ST, 24LC014 variants). The 900 ns variants provide faster memory access performance.

Moisture Sensitivity:

All substitute parts carry MSL 1 (Unlimited) rating, representing improved moisture handling compared to the original part's MSL 3 (168 Hours) specification. This provides enhanced reliability in storage and assembly environments.

Export Classification:

Substitute parts are classified as EAR99, providing simplified export compliance compared to the original part's 5A992C classification. This may reduce regulatory burden in international supply chains.

Frequently Asked Questions (FAQ)

Q: Can the 24AA01-I/ST directly replace the AT88SC0104CA-TH-T in existing designs?

A: The 24AA01-I/ST shares identical 8-TSSOP package geometry, surface-mount characteristics, 1Kbit memory capacity, and I2C interface protocol. Electrical compatibility exists within the overlapping voltage range (1.7V to 5.5V) and operating temperature range (-40°C to 85°C). However, the original AT88SC0104CA-TH-T is a secure memory device with cryptographic capabilities, while the 24AA01-I/ST is a standard EEPROM. Applications requiring cryptographic functions must evaluate whether standard EEPROM functionality is sufficient.

Q: What is the difference between 24AA014-I/ST and 24AA014H-I/ST?

A: Both parts share identical electrical specifications: 1Kbit memory, 128 x 8 organization, I2C 400 kHz interface, 900 ns access time, 5ms write cycle time, 1.7V to 5.5V supply range, and -40°C to 85°C operating temperature. The primary difference is packaging: 24AA014-I/ST is supplied in Tube packaging, while 24AA014H-I/ST is also supplied in Tube packaging. Both are functionally equivalent for circuit design purposes.

Q: Why do some substitute parts have different voltage ranges?

A: The 24AA01 series operates from 1.7V to 5.5V, while the 24LC014 series operates from 2.5V to 5.5V. The 24LC014 series is designed for applications requiring higher minimum supply voltage. Selection should match the specific power supply architecture of the target application.

Q: What is the significance of the "T" suffix in part numbers like 24AA014T-I/ST?

A: The "T" suffix indicates Tape & Reel (TR) packaging format, suitable for automated assembly processes. Parts without the "T" suffix are supplied in alternative packaging formats (Tube or standard). Selection depends on production assembly equipment and inventory management requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the difference between 24AA014-I/ST and 24LC014-I/ST?

A: Both parts share 1Kbit memory capacity, 128 x 8 organization, I2C 400 kHz interface, 900 ns access time, and 5ms write cycle time. The primary differences are: 24AA014-I/ST operates from 1.7V to 5.5V with -40°C to 85°C temperature range, while 24LC014-I/ST operates from 2.5V to 5.5V with the same temperature range. The 24LC014-E/ST variant extends temperature operation to 125°C. Selection depends on specific voltage and thermal requirements.

Q: Can I use 24AA01-I/ST as a substitute if I need faster access time?

A: The 24AA01-I/ST provides 3500 ns access time, which is slower than the 900 ns access time of the 24AA014 series. If faster memory access is required, select from the 24AA014 variants (24AA014-I/ST, 24AA014H-I/ST, 24AA014HT-I/ST, 24AA014T-I/ST) or 24LC014 variants (24LC014-E/ST, 24LC014-I/ST), all offering 900 ns access time.

Q: What is the MSL rating and why does it matter?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient moisture before assembly. The original AT88SC0104CA-TH-T carries MSL 3 (168 Hours), while all substitute parts carry MSL 1 (Unlimited). MSL 1 provides superior moisture tolerance, reducing risk of component degradation during storage and assembly processes.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Current inventory levels vary: 24AA014HT-I/ST has 3200 Pcs, 24AA01T-I/ST has 4182 Pcs, 24AA014-I/ST has 2252 Pcs, and 24LC014-I/ST has 3400 Pcs. Selection should consider both technical requirements and supply availability for production planning.

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