AT88SC0104CA-TH Equivalent & Substitute Parts

Part Overview

The AT88SC0104CA-TH is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series. This 8-TSSOP surface mount device provides 1Kbit secure memory functionality for embedded and smart card applications. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while offering continued availability and support.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	AT88SC0104CA-TH
Product Type	Secure Memory IC
Memory Size	1Kbit
Memory Organization	128 x 8
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the AT88SC0104CA-TH is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-TSSOP (0.173", 4.40mm Width) surface mount package to ensure PCB footprint compatibility without redesign.

Memory Capacity: Substitute parts must provide 1Kbit memory capacity with 128 x 8 organization to maintain functional equivalence in data storage applications.

Interface Protocol: The I2C interface is the standard communication protocol for all identified substitutes, ensuring software and hardware compatibility with existing system designs.

Voltage Supply Range: Substitute parts operate within 1.7V to 5.5V or 2.5V to 5.5V supply ranges, accommodating various system power architectures.

RoHS Compliance: All substitute parts maintain ROHS3 compliance status, meeting environmental and regulatory requirements equivalent to the original part.

Product Status: Active status substitutes ensure ongoing availability, technical support, and manufacturing continuity compared to the obsolete original part.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Organization	Interface	Package	Voltage Supply	Product Status	RoHS Status	MSL Rating
AT88SC0104CA-TH	Microchip Technology	1Kbit	128 x 8	Secure Memory	8-TSSOP	Not Specified	Obsolete	ROHS3	3
24AA01-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	1.7V ~ 5.5V	Active	ROHS3	1
24AA014-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	1.7V ~ 5.5V	Active	ROHS3	1
24AA014H-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	1.7V ~ 5.5V	Active	ROHS3	1
24AA01H-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	1.7V ~ 5.5V	Active	ROHS3	1
24LC014-E/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1
24LC014-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1
24LC014H-E/ST	Microchip Technology	1Kbit	128 x 8	I2C 1 MHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1
24LC014H-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 1 MHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1
24LC01B-E/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1
24LC01B-I/ST	Microchip Technology	1Kbit	128 x 8	I2C 400 kHz	8-TSSOP	2.5V ~ 5.5V	Active	ROHS3	1

Engineering Selection Recommendations

Primary Substitutes for Extended Temperature Range Applications:

24LC014-E/ST and 24LC014H-E/ST are recommended for applications requiring extended operating temperature range (-40°C to 125°C). These parts maintain ROHS3 compliance and active product status while providing superior thermal performance compared to standard temperature variants.

Primary Substitutes for Standard Temperature Applications:

24LC01B-I/ST and 24LC014-I/ST provide active product status with standard operating temperature range (-40°C to 85°C). Both parts are verified as programmable and maintain full ROHS3 compliance. The 24LC01B-I/ST variant offers verified programmability status.

High-Speed Interface Requirement:

24LC014H-I/ST and 24LC014H-E/ST support 1 MHz I2C clock frequency, providing faster data transfer compared to standard 400 kHz variants. These parts are suitable for applications requiring reduced access time (400 ns versus 900 ns).

Low Voltage Supply Requirement:

24AA01-I/ST, 24AA014-I/ST, 24AA014H-I/ST, and 24AA01H-I/ST support extended low voltage operation (1.7V minimum), accommodating battery-powered and low-power embedded systems. These variants maintain MSL rating of 1 (Unlimited), indicating superior moisture resistance.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence. Active product status guarantees continued manufacturing support and component availability for production and field replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the AT88SC0104CA-TH be directly replaced with 24LC01B-I/ST without PCB modification?

A: Yes. Both parts use identical 8-TSSOP (0.173", 4.40mm Width) surface mount packaging, ensuring footprint compatibility. Pin configuration and I2C interface protocol are compatible, allowing direct substitution without PCB redesign.

Q: What is the primary difference between 24AA01-I/ST and 24LC014-I/ST variants?

A: The primary difference is voltage supply range. 24AA01-I/ST operates from 1.7V to 5.5V, while 24LC014-I/ST operates from 2.5V to 5.5V. Additionally, 24LC014-I/ST supports extended operating temperature to 125°C (24LC014-E/ST variant), compared to standard 85°C for 24AA01-I/ST.

Q: Are high-speed variants (24LC014H series) backward compatible with standard 400 kHz I2C systems?

A: Yes. The 24LC014H-I/ST and 24LC014H-E/ST variants support 1 MHz I2C clock frequency but operate correctly in systems using standard 400 kHz I2C protocols. The higher clock frequency capability does not prevent operation in lower-speed systems.

Q: What does MSL rating 1 (Unlimited) indicate compared to the original part's MSL 3?

A: MSL rating 1 (Unlimited) indicates superior moisture resistance with no time-based storage restrictions. The original part's MSL 3 rating limits storage to 168 hours at specified humidity conditions. Substitute parts with MSL 1 rating provide extended shelf life and reduced moisture-related failures during storage and handling.

Q: Which substitute part offers the best availability for immediate production use?

A: 24LC014-I/ST provides the highest inventory level (3400 pieces) among active substitutes, ensuring immediate availability for production requirements. This part maintains standard operating temperature range (-40°C to 85°C) and 400 kHz I2C interface compatibility.

Q: Is the 24LC01B-I/ST suitable for applications originally designed for the AT88SC0104CA-TH?

A: Yes. The 24LC01B-I/ST provides functional equivalence with verified programmability status, 1Kbit memory capacity, 128 x 8 organization, and I2C interface. The part is ROHS3 compliant and active, making it suitable for direct replacement in embedded and smart card applications.

Q: What is the significance of "Verified" programmability status on 24LC01B variants?

A: Verified programmability status indicates that the part has been tested and confirmed to support programming operations within specified parameters. This certification provides assurance for applications requiring in-system or field programming capabilities.

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