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Microchip Technology AT97SC3204-X2A16-20
- Part No.:
- AT97SC3204-X2A16-20
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-X2A16-20.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
AT97SC3204-X2A16-20 from Atmel is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications, featuring an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2–compliant RNG, and 1756-byte NV user storage. It operates at 3.3V on a 33MHz LPC bus and targets secure boot and platform authentication in desktop/laptop motherboards.
For engineers reviewing the AT97SC3204-X2A16-20 datasheet, AT97SC3204-X2A16-20 pinout, AT97SC3204-X2A16-20 application, or AT97SC3204-X2A16-20 equivalent, key selection criteria include LPC interface timing compliance, industrial temperature range (-40°C to +85°C), 40-pin QFN package footprint, TCG 1.2 firmware integration, and hardware-based key protection via internal EEPROM.
Technical Context
The AT97SC3204-X2A16-20 implements a complete TCG-compliant security stack on a single die: an 8-bit AVR CPU executes certified TPM firmware, while dedicated crypto hardware accelerates RSA-1024 (40ms) and SHA-1 (20μs/64-byte block). Its LPC interface supports SIRQ and CLKRUN# for power-aware interrupt handling in mobile platforms.
Security primitives are hardened at silicon level: physical tamper detection circuitry, secure key storage in EEPROM, and a FIPS 140-2–validated RNG feed all cryptographic operations. The device requires no external memory or firmware updates - full TPM functionality is delivered as a turnkey module with pre-integrated BIOS and OS drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client TIS 1.2 - enables interoperable secure boot and attestation in Windows/Linux OEM systems. |
| LPC Interface Speed | 33MHz clock support - matches standard LPC bus timing for direct integration into Intel/AMD chipset reference designs. |
| RSA Signature Time | 2048-bit RSA signature in ≤200ms - meets TCG latency requirements for measured boot and remote attestation workflows. |
| RNG Certification | FIPS 140-2–compliant hardware RNG - provides cryptographically secure entropy for key generation without software seeding. |
| NV User Storage | 1756 bytes of non-volatile user-defined data space - supports OEM-specific credentials, certificates, or policy flags without consuming platform flash. |
| Operating Temperature | -40°C to +85°C industrial grade - qualified for use in embedded controllers, ruggedized PCs, and industrial gateways. |
| Supply Voltage | 3.3V ±10% - compatible with standard motherboard LDO rails and eliminates need for additional voltage translation. |
Pinout & Package
AT97SC3204-X2A16-20 is packaged in a 40-pad QFN (6.0mm × 6.0mm, 0.50mm pitch), pin-compatible with the 40ML1 variant per Atmel ordering documentation. This package supports automated reflow assembly and thermal dissipation suitable for dense motherboard layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary 3.3V supply input | Power domain for core logic, crypto engine, and EEPROM - must be decoupled per layout guidelines to maintain TCG noise immunity. |
| SB3V | Standby 3.3V supply input | Independent rail for RTC and low-power retention circuits - enables persistent state during S3/S4 sleep states. |
| LAD0–LAD3 | LPC bidirectional data/address/command lines | Time-multiplexed 4-bit bus carrying TCG command sequences - requires controlled impedance routing and length matching. |
| LFRAME# | LPC frame strobe input | Indicates start/end of LPC transaction cycle - synchronizes host-to-TPM command framing per TIS 1.2 timing diagrams. |
| SERIRQ | Serialized interrupt request I/O | Shares IRQ line with other LPC peripherals using serialized protocol - eliminates dedicated interrupt pin and simplifies BIOS IRQ routing. |
| CLKRUN# | LPC clock run control I/O | Enables dynamic clock gating during idle periods - reduces platform power consumption in mobile and fanless systems. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assignable to TPM_NV_INDEX_GPIO_00 per firmware - supports OEM-specific hardware enable/disable or status signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA crypto accelerator | Offloads 1024/2048-bit RSA signing from host CPU - reduces boot time overhead and prevents software-side side-channel leakage. |
| Integrated AVR RISC processor | Runs certified TPM firmware independently - eliminates external microcontroller and ensures deterministic execution of TCG command handlers. |
| Internal EEPROM key storage | Stores RSA private keys in tamper-resistant non-volatile memory - prevents extraction via cold-boot or bus snooping attacks. |
| LPC interface with CLKRUN# support | Enables full LPC power management including clock stop - meets ACPI S3/S4 requirements for enterprise-class portable devices. |
| FIPS 140-2–certified RNG | Provides NIST-validated entropy source for key derivation - satisfies regulatory requirements for government and financial sector deployments. |
Applications
| Desktop/Laptop Motherboard Security | Industrial Control System Root-of-Trust |
|---|---|
Use Scenario: Secure boot chain enforcement and hardware-backed BitLocker encryption key sealing on x86 platforms. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust executing measured boot, PCR extension, and sealed storage operations via LPC interface. Use Value: Prevents unauthorized firmware modification and ensures OS integrity before loading - validated by Microsoft Windows Hardware Compatibility Program. |
Use Scenario: Firmware authentication and secure remote update verification in programmable logic controllers (PLCs) and HMIs. IC Role / Device Role / Timing Role: Standalone trusted execution environment providing cryptographic verification of signed firmware images over Modbus TCP or EtherNet/IP. Use Value: Enables field-upgradable systems with zero-touch certificate validation - eliminates manual key injection and reduces service downtime. |
| Server Platform Attestation | Medical Device Data Integrity |
Use Scenario: Remote attestation of hypervisor integrity and VM configuration in virtualized data center environments. IC Role / Device Role / Timing Role: TPM endpoint responding to TCG-compliant challenge-response protocols over LPC, supporting vTPM proxying. Use Value: Provides verifiable proof of unmodified firmware stack to cloud orchestration tools - required for HIPAA and PCI-DSS audit compliance. |
Use Scenario: Tamper-evident logging and encrypted patient data storage in FDA-cleared diagnostic imaging equipment. IC Role / Device Role / Timing Role: Cryptographic anchor for digital signatures on DICOM headers and audit trails stored in internal NV memory. Use Value: Meets 21 CFR Part 11 electronic record/electronic signature requirements - ensures non-repudiation and long-term data authenticity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665TT2.0 | Supports TPM 2.0 specification; uses ARM Cortex-M0+ instead of AVR; 64KB internal flash vs. EEPROM-based key storage. | Required for Windows 11 and newer UEFI Secure Boot implementations; lacks native TIS 1.2 backward compatibility. | Select when upgrading to TPM 2.0 mandates or requiring larger firmware update capacity - not drop-in compatible with AT97SC3204-X2A16-20 LPC timing. |
| Nuvoton NPCT650KBAX | TPM 1.2 compliant; same 33MHz LPC interface; integrates hardware AES engine absent in AT97SC3204-X2A16-20. | Better suited for applications needing bulk encryption (e.g., full-disk encryption acceleration) alongside TPM functions. | Choose if AES offload is critical and TCG 1.2 sufficiency is confirmed - pinout differs (32-pin QFN), requiring PCB redesign. |
Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT650KBAX, AT97SC3204-X2A16-20 delivers proven TCG 1.2 interoperability with legacy BIOS and minimal driver integration effort, making it optimal for cost-sensitive, long-lifecycle industrial and commercial PC platforms where TPM 2.0 migration is not yet required.
Availability
AT97SC3204-X2A16-20 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial control system certification, and medical device data integrity applications requiring stable component supply across extended product lifecycles.
Supply support for AT97SC3204-X2A16-20 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, security ICs, and touch solutions for embedded systems.
The AT97SC3204-X2A16-20 belongs to Atmel's Trusted Platform Module product line, engineered specifically to deliver certified, turnkey hardware root-of-trust for PC client and embedded platforms adhering to TCG standards.
FAQ
What is the primary compliance standard met by the AT97SC3204-X2A16-20?
The AT97SC3204-X2A16-20 is fully compliant with the Trusted Computing Group (TCG) Trusted Platform Module (TPM) version 1.2 specification and the TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. This dual compliance ensures interoperability with Windows Vista through Windows 10 legacy boot environments and standard BIOS implementations that require TCG 1.2–certified security modules.
Does the AT97SC3204-X2A16-20 support industrial temperature operation?
Yes, the AT97SC3204-X2A16-20 is rated for industrial temperature range operation from -40°C to +85°C. This rating is explicitly documented in Atmel's ordering information and package addendum, confirming its suitability for deployment in harsh environments such as factory automation controllers, transportation computing units, and outdoor kiosks where ambient thermal stress exceeds commercial-grade limits.
What package type is used for the AT97SC3204-X2A16-20?
The AT97SC3204-X2A16-20 uses a 40-pad Very-thin Quad Flat No Lead (VQFN) package, designated as 40ML1, with dimensions of 6.0mm × 6.0mm and 0.50mm pitch. This package is confirmed in Atmel's official package drawings and ordering code documentation, and it is distinct from the 28-pin TSSOP variants offered in the same family.
How does the AT97SC3204-X2A16-20 handle cryptographic key storage?
The AT97SC3204-X2A16-20 stores RSA private keys and other sensitive credentials in internal EEPROM memory, which is physically isolated and protected by Atmel's secure hardware layout. This internal EEPROM is not accessible via the LPC interface - keys remain bound to the silicon and cannot be extracted through software commands or bus monitoring, satisfying TCG 1.2 requirements for protected storage.
Is the AT97SC3204-X2A16-20 compatible with modern UEFI firmware?
The AT97SC3204-X2A16-20 supports UEFI firmware through its LPC interface and TIS 1.2 compliance, but it does not implement TPM 2.0 features required for Windows 11 or newer UEFI Secure Boot profiles. It remains fully functional in UEFI Class 2/3 platforms that retain TCG 1.2 support for legacy compatibility, and Atmel provides BIOS-level drivers validated for major UEFI implementations.
AT97SC3204-X2A16-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Trusted Platform Module (TPM)
- Core Processor:
- AVR
- Program Memory Type:
- EEPROM
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- LPC
- Number of I/O:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-X2A16-20 FAQ
1.How can I place an order for AT97SC3204-X2A16-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-X2A16-20 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT97SC3204-X2A16-20 reliable?
The price and inventory of AT97SC3204-X2A16-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-X2A16-20 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-X2A16-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-X2A16-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-X2A16-20?
AT97SC3204-X2A16-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-X2A16-20 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT97SC3204-X2A16-20?
For technical support, including AT97SC3204-X2A16-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-X2A16-20 requirements.
6.How does Aetrix verify that AT97SC3204-X2A16-20 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-X2A16-20 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT97SC3204-X2A16-20 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-X2A16-20?
All AT97SC3204-X2A16-20 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-X2A16-20, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT97SC3204-X2A16-20 part is unused and in its original packaging.
Return procedure for AT97SC3204-X2A16-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-X2A16-20 Tags
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