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AT88SC0204CA-TH-T Equivalent & Substitute Parts
Part Overview
The AT88SC0204CA-TH-T is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series. This device is classified as an 8-TSSOP surface mount secure memory component designed for embedded and smart card applications. The part is currently listed as obsolete, necessitating identification of functionally equivalent substitute components for ongoing design requirements and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Part Number | AT88SC0204CA-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 |
| HTSUS Code | 8542.32.0051 |
Substitute Part Grouping Explanation
Substitution of the AT88SC0204CA-TH-T 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 layout and assembly process compatibility.
Memory Interface & Organization: The substitute parts must support I2C interface protocol with 2Kbit memory capacity organized as 256 x 8 bits to maintain functional equivalence in data storage and communication.
Electrical Specifications: Operating voltage range of 1.7V to 5.5V and operating temperature range of -40°C to 85°C (TA) ensure compatibility with the original application environment.
Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements equivalent to the original component.
Moisture Sensitivity: Substitute parts with MSL rating of 1 (Unlimited) provide superior moisture handling compared to the original MSL 3 rating, offering improved reliability in storage and handling.
Parameter Comparison
| Part Number | Manufacturer | Memory Type | Memory Size | Memory Interface | Clock Frequency | Package | Voltage Supply | Operating Temperature | MSL | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AT88SC0204CA-TH-T | Microchip Technology | Secure Memory | 2Kbit | Proprietary | N/A | 8-TSSOP | N/A | N/A | 3 | Obsolete | ROHS3 |
| 24AA02-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA024-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA024H-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA024HT-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA024T-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA025-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA025T-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA02H-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA02HT-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
| 24AA02T-I/ST | Microchip Technology | EEPROM | 2Kbit | I2C | 400 kHz | 8-TSSOP | 1.7V ~ 5.5V | -40°C ~ 85°C | 1 | Active | ROHS3 |
Engineering Selection Recommendations
All listed substitute parts are manufactured by Microchip Technology and maintain active product status, ensuring long-term availability and supply chain stability. Each substitute part is ROHS3 compliant and REACH unaffected, satisfying regulatory requirements equivalent to the original AT88SC0204CA-TH-T component.
Packaging Variants: Substitute parts are available in two packaging configurations: Tube (standard packaging) and Tape & Reel (TR) for automated assembly. Selection between these variants depends on production volume and assembly equipment requirements.
Moisture Sensitivity Improvement: All substitute parts feature MSL rating of 1 (Unlimited), providing superior moisture handling characteristics compared to the original MSL 3 rating. This improvement reduces risk during storage, handling, and assembly processes.
Programmable Status: Parts designated as "Verified" for DiGi-Electronics Programmable status (24AA024T-I/ST and 24AA02T-I/ST) have been validated for programming compatibility with DiGi-Electronics equipment, offering additional assurance for production environments utilizing this infrastructure.
Memory Organization: All substitute parts maintain identical 256 x 8 memory organization with 2Kbit total capacity, ensuring functional equivalence in data storage applications.
Frequently Asked Questions (FAQ)
Q: Why is the AT88SC0204CA-TH-T classified as obsolete?
A: The AT88SC0204CA-TH-T is listed as obsolete by Microchip Technology. The substitute parts listed are active products that provide equivalent functionality and maintain compatibility with the original package footprint and electrical specifications.
Q: What is the primary difference between the original part and substitute parts?
A: The original AT88SC0204CA-TH-T is a secure memory device with proprietary communication protocol. The substitute parts are standard EEPROM devices using I2C interface protocol. Both provide 2Kbit non-volatile memory in identical 8-TSSOP packages with compatible electrical operating ranges.
Q: Are all substitute parts pin-compatible with the original AT88SC0204CA-TH-T?
A: All substitute parts use the 8-TSSOP (0.173", 4.40mm Width) package, ensuring identical PCB footprint compatibility. Pin-level compatibility depends on application-specific requirements and must be verified against circuit design documentation.
Q: What does the "T" suffix in part numbers like 24AA024T-I/ST indicate?
A: The "T" suffix indicates Tape & Reel (TR) packaging format, suitable for automated assembly processes. Parts without this suffix are supplied in Tube packaging for manual or semi-automated assembly.
Q: What is the significance of the "H" designation in part numbers?
A: The "H" designation indicates enhanced specifications or variant configurations within the 24AA02x series. Specific technical differences are determined by individual part datasheets.
Q: Can I use substitute parts interchangeably in production?
A: Substitute parts are electrically and mechanically compatible based on the parameters provided. However, application-specific requirements such as communication protocol support, firmware compatibility, and circuit design must be evaluated before implementation.
Q: What is the difference between MSL 1 and MSL 3 ratings?
A: MSL 1 (Unlimited) allows indefinite storage without moisture absorption concerns. MSL 3 (168 Hours) requires controlled storage conditions and limits exposure to moisture-laden environments to 168 hours before reflow soldering. Substitute parts with MSL 1 offer superior handling flexibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original component.
Q: What inventory levels are available for substitute parts?
A: Inventory availability varies by part number and packaging format. Current stock levels range from 715 to 3746 pieces across the substitute part portfolio, with 24AA02T-I/ST offering the highest availability at 3592 pieces.
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