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Microchip Technology AT97SC3205-G3M45-10
- Part No.:
- AT97SC3205-G3M45-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205-G3M45-10.pdf
- Description:
- FF COM SPI TPM 4X4 32VQFN UEK -
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3205-G3M45-10 from Microchip Technology (formerly Atmel) is a single-chip Trusted Platform Module (TPM) compliant with TCG TPM 1.2 and PC Client TIS 1.3 specifications. It integrates an AVR® RISC microprocessor, hardware asymmetric crypto engine, FIPS-140-2 certified RNG/AES/SHA/RSA engines, 2066-byte NV user storage, and SPI interface up to 45 MHz - deployed in PC motherboards and embedded security subsystems for platform integrity attestation.
For engineers reviewing the AT97SC3205-G3M45-10 datasheet, AT97SC3205-G3M45-10 pinout, AT97SC3205-G3M45-10 application, or AT97SC3205-G3M45-10 equivalent, key selection criteria include TCG 1.2 compliance, SPI interface timing (24–33 MHz typical PC range), 3.3 V operation, industrial temperature support (−40°C to +85°C), and dual-package availability (28-pin TSSOP / 32-pad QFN).
Technical Context
The AT97SC3205-G3M45-10 implements a dedicated security co-processor architecture with on-die EEPROM for RSA key storage and dynamic internal memory management for key caching. Its hardware crypto engine executes RSA signing/decryption, SHA-1 hashing, HMAC authentication, and AES encryption without host CPU intervention.
It uses a FIPS-140-2 validated pseudo-random number generator for key generation and protocol randomness, and supports physical presence assertion via PP/GPIO pin. The SPI interface operates in slave mode with active-low PIRQ# interrupt signaling and SPI_RST# reset synchronization required for TCG-compliant system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 and PC Client TIS 1.3 - ensures interoperability with BIOS/UEFI firmware and OS-level TPM stacks (e.g., Windows TPM Base Services, Linux tpm_tis). |
| SPI Interface Speed | Up to 45 MHz, with typical PC operating range 24–33 MHz - defines maximum command throughput and latency for platform boot-time attestation. |
| Supply Voltage | 3.3 V ±10% - requires tight decoupling (2200–4700 pF near each VCC pin, <5 mm to adjacent GND) for stable cryptographic operation. |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade embedded systems including server motherboards and ruggedized edge devices. |
| NV Storage Capacity | 2066 bytes user-defined data - enables persistent storage of platform configuration registers (PCRs), sealed keys, and custom authorization policies. |
| Crypto Certification | FIPS-140-2 Level 2 certified RNG, HMAC, AES, SHA, RSA - satisfies U.S. federal and enterprise security policy requirements for cryptographic module validation. |
| Package Options | 28-pin thin TSSOP (4.4 × 9.7 mm, 0.65 mm pitch) and 32-pad QFN (4.0 × 4.0 × 0.9 mm, 0.4 mm pitch) - supports space-constrained PCB layouts and thermal management in high-density platforms. |
Pinout & Package
AT97SC3205-G3M45-10 is offered in two RoHS-compliant packages: 28-pin thin TSSOP (28X1) and 32-pad very thin QFN (32M3). Both support industrial temperature range and share identical pin functionality; package selection depends on board area, thermal, and assembly constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires localized decoupling capacitors (2200–4700 pF) within 5 mm of each VCC–GND pair. |
| GND | Ground reference | System ground return; multiple GND pins provide low-impedance paths for noise-sensitive crypto operations. |
| MISO / MOSI / SPI_CLK / SPI_CS# / SPI_RST# | SPI bus interface | Full-duplex slave interface supporting TCG-specified command framing; SPI_RST# must be tied to system reset for TPM_Init compliance. |
| PIRQ# | Interrupt output | Active-low interrupt signal asserted by TPM to notify host of command completion or error - requires pull-down or direct GND tie if unused. |
| PP/GPIO | Physical presence indicator | Hardware-asserted active-high signal enabling BIOS-controlled secure operations (e.g., clearing owner hierarchy); internal pull-down. |
| GPIO Express-00 | Configurable I/O | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; used for platform-specific GPIO control or XOR chain test output. |
| XTamper / TestBI | Tamper detection / test | Multi-function pin: active-high external tamper event input or manufacturing test interface; tied to GND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Turnkey TPM implementation | Firmware pre-integrated per TCG 1.2 spec - eliminates need for external boot code or host-side TPM stack development. |
| Hardware asymmetric crypto engine | Dedicated RSA acceleration with key cache management - offloads 1024/2048-bit signing/decryption from host CPU during boot and runtime attestation. |
| FIPS-140-2 Level 2 certification | Covers RNG, HMAC, AES, SHA, RSA engines and secure chip layout - meets U.S. government and regulated industry procurement requirements. |
| Internal EEPROM for RSA keys | Non-volatile key storage isolated from host memory - prevents key extraction via software attacks or DMA snooping. |
| Secure hardware/firmware design | Physical security circuitry and tamper-evident layout - detects and responds to voltage, temperature, and probe-based attacks per TCG robustness guidelines. |
Applications
| Desktop/Laptop Platform Integrity | Server Boot Attestation |
|---|---|
Use Scenario: Verifying BIOS, bootloader, and OS kernel integrity during cold boot on x86/x64 PCs. IC Role / Device Role / Timing Role: TPM 1.2 co-processor executing PCR extension, quote generation, and sealed storage using hardware-accelerated SHA-1 and RSA. Use Value: Enables measured boot chains with cryptographically verifiable trust anchors, satisfying Windows Defender Credential Guard and BitLocker requirements. | Use Scenario: Securing remote management firmware (e.g., IPMI, BMC) and validating hypervisor launch on rack-mounted servers. IC Role / Device Role / Timing Role: Root-of-trust module providing attestation reports to out-of-band management controllers via SPI interface. Use Value: Prevents unauthorized firmware modification and enables zero-touch provisioning with hardware-backed identity binding. |
| Industrial Edge Device Identity | Embedded IoT Secure Boot |
Use Scenario: Establishing device identity and secure firmware update verification in programmable logic controllers (PLCs) and HMIs. IC Role / Device Role / Timing Role: Cryptographic root-of-trust enforcing signed firmware image validation before execution in resource-constrained industrial MCUs. Use Value: Mitigates supply-chain compromise by binding firmware signatures to hardware-unique keys stored in AT97SC3205-G3M45-10 EEPROM. | Use Scenario: Enabling secure over-the-air (OTA) updates in connected medical or building automation gateways. IC Role / Device Role / Timing Role: TPM performing HMAC-based challenge-response authentication and AES-encrypted payload decryption during OTA staging. Use Value: Ensures end-to-end confidentiality and authenticity of field-upgradable firmware without exposing keys to host application processors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665 TT 1.2 | PCIe-based LPC interface instead of SPI; supports TPM 2.0 firmware upgrade path; higher power consumption (15 mA typical vs. AT97SC3205-G3M45-10's 10 mA) | Targeted at legacy x86 platforms with LPC bus; not pin-compatible; requires different BIOS driver integration. | Select when upgrading existing LPC-based designs or requiring future TPM 2.0 migration capability. |
| Nuvoton NPCT650KBAX | SPI interface at 40 MHz max; integrated temperature sensor; no FIPS-140-2 certification; supports only commercial temperature range (0°C to 70°C) | Cost-optimized for consumer notebooks; lacks industrial temp rating and formal crypto validation required for enterprise/server use. | Select for cost-sensitive client platforms where FIPS validation and extended temperature operation are not mandated. |
Compared with Infineon SLB9665 TT 1.2 and Nuvoton NPCT650KBAX, the AT97SC3205-G3M45-10 uniquely combines SPI interface compatibility with FIPS-140-2 Level 2 certification, industrial temperature support, and TCG 1.2 compliance in a dual-package footprint - making it suitable for security-critical embedded deployments where regulatory validation and environmental robustness are mandatory.
Availability
AT97SC3205-G3M45-10 is available at Aetrix Electronics and suitable for desktop platform integrity, server boot attestation, and industrial edge device identity applications requiring stable component supply across long product lifecycles.
Supply support for AT97SC3205-G3M45-10 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
Microchip Technology acquired Atmel in 2016 and maintains its trusted computing portfolio, delivering secure microcontrollers and dedicated security ICs for industrial, automotive, and cloud infrastructure markets.
The AT97SC3205-G3M45-10 belongs to Atmel's TPM product line, designed specifically to implement TCG-specified trusted boot and attestation functions in PC-class and embedded systems with minimal host software overhead.
FAQ
What is the primary compliance standard met by the AT97SC3205-G3M45-10?
The AT97SC3205-G3M45-10 is fully compliant with the Trusted Computing Group (TCG) Trusted Platform Module (TPM) Version 1.2 Specification and the PC Client-Specific TPM Interface Specification (TIS) Version 1.3. It also holds FIPS-140-2 Level 2 certification for its RNG, HMAC, AES, SHA, and RSA engines - confirming adherence to U.S. federal cryptographic standards. This dual compliance makes the AT97SC3205-G3M45-10 suitable for government and enterprise deployments requiring auditable security assurance.
Does the AT97SC3205-G3M45-10 support both commercial and industrial temperature ranges?
Yes, the AT97SC3205-G3M45-10 is qualified for industrial temperature operation from −40°C to +85°C, as confirmed in the official Atmel ordering information and package documentation. This extends its usability beyond consumer PCs into ruggedized embedded systems such as industrial controllers, network appliances, and edge gateways where ambient thermal conditions exceed commercial limits. The AT97SC3205-G3M45-10 maintains full TCG 1.2 functionality across this full range.
What are the supported package types for the AT97SC3205-G3M45-10?
The AT97SC3205-G3M45-10 is available in two RoHS-compliant packages: 28-pin thin TSSOP (28X1, 4.4 × 9.7 mm body, 0.65 mm pitch) and 32-pad very thin QFN (32M3, 4.0 × 4.0 × 0.9 mm, 0.4 mm pitch). Both packages share identical electrical functionality and pin mapping, allowing layout flexibility based on board density, thermal dissipation needs, and assembly capabilities. The AT97SC3205-G3M45-10's dual-package offering supports both legacy through-hole-compatible routing and modern fine-pitch SMT processes.
How does the AT97SC3205-G3M45-10 handle secure key storage?
The AT97SC3205-G3M45-10 uses on-die EEPROM to store RSA private keys and other sensitive cryptographic material, isolating them from host memory access. Its hardware key cache dynamically manages multiple loaded keys without host intervention, using commands like TPM_FlushSpecific and TPM_LoadKey2. Keys never leave the die in plaintext, and the AT97SC3205-G3M45-10 enforces strict authorization policies (e.g., password, locality, physical presence) before permitting key usage - ensuring protection against software-based extraction or side-channel attacks.
Is the AT97SC3205-G3M45-10 compatible with standard TPM software stacks?
Yes, the AT97SC3205-G3M45-10 implements the TCG-specified SPI command set and register layout defined in the PC Client TIS 1.3 specification, ensuring binary compatibility with standard TPM drivers including Microsoft's TPM Base Services, Linux kernel's tpm_tis_spi module, and open-source stacks like TrouSerS and IBM's TPM Software Stack. Host firmware (BIOS/UEFI) must correctly configure SPI_CS#, SPI_RST#, and PIRQ# signals per the AT97SC3205-G3M45-10 pinout to enable full stack interoperability.
AT97SC3205-G3M45-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- 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:
- SPI
- Number of I/O:
- 4
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205-G3M45-10 FAQ
1.How can I place an order for AT97SC3205-G3M45-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205-G3M45-10 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 AT97SC3205-G3M45-10 reliable?
The price and inventory of AT97SC3205-G3M45-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205-G3M45-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3205-G3M45-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205-G3M45-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205-G3M45-10?
AT97SC3205-G3M45-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205-G3M45-10 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 AT97SC3205-G3M45-10?
For technical support, including AT97SC3205-G3M45-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205-G3M45-10 requirements.
6.How does Aetrix verify that AT97SC3205-G3M45-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205-G3M45-10 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 AT97SC3205-G3M45-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3205-G3M45-10?
All AT97SC3205-G3M45-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205-G3M45-10, 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 AT97SC3205-G3M45-10 part is unused and in its original packaging.
Return procedure for AT97SC3205-G3M45-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205-G3M45-10 Tags
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