AT97SC3204-H4M44-20 Equivalent & Substitute Parts

Part Overview

The AT97SC3204-H4M44-20 is an embedded Trusted Platform Module (TPM) integrated circuit manufactured by Microchip Technology. This CryptoController™ series component features an AVR core processor with EEPROM program memory and operates on a 3.3V supply. The device is housed in a 32-pin VQFN package with 4x4mm dimensions and is designed for LPC interface applications. The part maintains Active product status and is ROHS3 compliant with Moisture Sensitivity Level 3 (168 hours). Substitute parts are identified when equivalent functional performance can be achieved through alternative interface implementations or operating temperature ranges while maintaining core TPM functionality and physical compatibility.

Substiute Parts

AT97SC3204-H4M44-20

Microchip TechnologyIn Stock: 1140AT97SC3204-H4M44-20 Datasheet

Current PartRFQ

AT97SC3205T-H3M4C-20

Microchip TechnologyIn Stock: 1829AT97SC3205T-H3M4C-20 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT97SC3205T-H3M4C-20 qualifies as a substitute based on the following alignment criteria:

Maintained Parameters:

• Manufacturer: Microchip Technology (same source)
• Core Processor: AVR (identical processing architecture)
• Program Memory Type: EEPROM (same memory implementation)
• Voltage Supply: 3.3V (identical power requirement)
• Package Type: 32-VQFN (4x4mm) (identical physical form factor)
• RoHS Status: ROHS3 Compliant (equivalent compliance)
• MSL Rating: 3 (168 Hours) (identical moisture sensitivity)
• Product Status: Active (current availability)
• Application: Trusted Platform Module (TPM) (same functional purpose)

Differing Parameters:

• Interface: I2C (substitute) vs. LPC (original)
• Operating Temperature: 0°C ~ 70°C (substitute) vs. -40°C ~ 85°C (original)
• Mounting Type: Surface Mount (specified for substitute)
• Packaging Format: Tape & Reel (TR) / Cut Tape (CT) (substitute) vs. standard packaging (original)

Substitution is valid when system design permits I2C interface operation and operating temperature requirements fall within the 0°C ~ 70°C range.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (AT97SC3204-H4M44-20): Select this part when LPC interface connectivity is required and extended operating temperature range (-40°C ~ 85°C) is necessary for the application. This part maintains Active product status with full ROHS3 compliance and standard availability.

Substitute Part Selection (AT97SC3205T-H3M4C-20): Select this substitute when I2C interface operation is compatible with system architecture and operating temperature requirements are constrained to 0°C ~ 70°C. This part is available in Tape & Reel (TR) and Cut Tape (CT) packaging formats, suitable for high-volume production environments. Both parts maintain identical ROHS3 compliance, MSL ratings, and Active product status.

Compliance Considerations: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN regulations. Selection between parts should be driven by interface protocol requirements and thermal operating envelope specifications rather than compliance or availability factors.

Frequently Asked Questions (FAQ)

Q: Can AT97SC3205T-H3M4C-20 directly replace AT97SC3204-H4M44-20 in existing designs?

A: Direct replacement requires interface protocol compatibility. The substitute uses I2C instead of LPC. System firmware and host controller interface logic must support I2C communication. Physical form factor (32-VQFN 4x4mm) and power supply (3.3V) are identical, enabling PCB-level compatibility only if interface protocol is accommodated.

Q: What are the temperature operating range implications for substitution?

A: The main part operates from -40°C to 85°C, while the substitute operates from 0°C to 70°C. Applications requiring extended low-temperature operation below 0°C or high-temperature operation above 70°C must use the main part. Standard commercial temperature range applications (0°C ~ 70°C) can use either part.

Q: Are packaging differences significant for component selection?

A: The substitute is available in Tape & Reel (TR) and Cut Tape (CT) formats, optimized for automated assembly and high-volume production. The main part packaging format is not specified in available data. Both use identical 32-VQFN (4x4mm) physical packages. Packaging selection depends on production volume and assembly process requirements.

Q: Do both parts share identical compliance certifications?

A: Both parts are ROHS3 compliant with MSL rating 3 (168 hours). Both maintain Active product status. ECCN classifications differ (EAR99 for main part, 5A992C for substitute), reflecting interface protocol differences. REACH status is unaffected for both parts.

Q: What is the primary technical difference between these parts?

A: The primary difference is the communication interface: LPC (Low Pin Count) for the main part versus I2C (Inter-Integrated Circuit) for the substitute. Both implement identical TPM functionality with AVR core processors and EEPROM memory. Interface selection determines system-level compatibility and firmware implementation requirements.