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Microchip Technology AT97SC3205-G3M45-00
- Part No.:
- AT97SC3205-G3M45-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205-G3M45-00.pdf
- Description:
- FF COM SPI TPM 4X4 32VQFN CEK
- Quantity:
- Payment:
- Shipping:
Inventory:765
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Product details
Overview
AT97SC3205-G3M45-00 from Microchip Technology (formerly Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC implementing hardware-based cryptographic services for PC and embedded platforms. It integrates an AVR RISC microprocessor, FIPS-140-2 certified RNG, AES/SHA/RSA engines, 2066-byte NV user storage, and SPI interface up to 45 MHz - deployed in systems requiring secure boot, key attestation, and platform integrity verification.
For engineers reviewing the AT97SC3205-G3M45-00 datasheet, AT97SC3205-G3M45-00 pinout, AT97SC3205-G3M45-00 application, or AT97SC3205-G3M45-00 equivalent, this page delivers verified package mapping (32-pad QFN), SPI timing constraints, GPIO roles, tamper detection capability, and FIPS-140-2–validated crypto engine specifications - all critical for BIOS integration, secure firmware update design, and TCG-compliant system validation.
Technical Context
The AT97SC3205-G3M45-00 implements the TCG TPM 1.2 specification with full support for TIS 1.3 over SPI, including PIRQ# interrupt signaling and SPI_RST# reset synchronization required for PC client platforms. Its internal architecture combines an 8-bit AVR CPU, dedicated crypto accelerator, and EEPROM-resident RSA key storage managed via dynamic cache without host intervention.
Security primitives include a FIPS-140-2–certified RNG used for key generation and protocol randomness, plus HMAC, AES-128, SHA-1, and RSA-2048 engines. The device supports hardware physical presence (PP/GPIO), external tamper detection (XTamper), and GPIO Express-00 for NV-indexed I/O control - all mapped to defined TCG command sets and BIOS initialization sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 Specification and PC Client-Specific TIS 1.3 - ensures interoperability with Windows BitLocker, Linux tpm-tools, and UEFI Secure Boot stacks. |
| SPI Interface | Up to 45 MHz clock rate (24–33 MHz typical PC range); supports active-low SPI_CS#, SPI_RST#, and PIRQ# interrupt - enables low-latency command/response cycles in BIOS runtime. |
| Crypto Certification | FIPS-140-2 Level 2 certified module including RNG, HMAC, AES, SHA, and RSA - satisfies federal and enterprise security policy requirements for cryptographic validation. |
| Nonvolatile Storage | 2066 bytes of user-defined NV space + internal EEPROM for RSA keys - allows persistent storage of credentials, certificates, and platform configuration data across power cycles. |
| Supply & Temp | 3.3 V ±10% supply; industrial temperature range (−40°C to +85°C) - suitable for extended-life embedded systems and server motherboards with thermal margin. |
| Package | 32-pad QFN (4.0 × 4.0 × 0.9 mm, 0.4 mm pitch); lead-free, RoHS-compliant - enables high-density PCB layout with thermal pad grounding for EMI control. |
Pinout & Package
AT97SC3205-G3M45-00 is packaged in a 32-pad Very Thin QFN (VQFN) with exposed thermal pad tied internally to GND. Pin assignments follow TCG-specified SPI and GPIO signal definitions, with dual-role pins (e.g., TestBI/GPIO/XTamper) supporting manufacturing test, general-purpose I/O, or tamper event reporting based on firmware configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply | 3.3 V input; requires local 2200–4700 pF decoupling within 5 mm of each VCC pin and 0.1 µF bulk capacitor near chip - critical for stable RNG operation and TCG timing compliance. |
| GND | Ground Reference | System ground return; substrate center pad is internally connected to GND - must be soldered to PCB ground plane for thermal and EMI performance. |
| MISO / MOSI / SPI_CLK / SPI_CS# / SPI_RST# | SPI Interface Signals | Standard 4-wire SPI slave interface; SPI_RST# pulse ≥2 µs resets internal state to power-on condition - must be tied to system reset per TCG requirements. |
| PIRQ# | Interrupt Output | Active-low interrupt asserted by TPM to signal command completion or error - requires pull-down to GND if unused; drives standard PCI/PCIe interrupt logic. |
| PP/GPIO | Physical Presence Indicator | Hardware-level physical presence assertion (active-high); used during BIOS setup to authorize privileged TPM operations - internal pull-down enables safe floating when inactive. |
| TestBI/GPIO/XTamper | Multi-function Terminal | Configurable as GPIO, tamper input (active-high), or test input; XTamper mode triggers immediate TPM shutdown and key zeroization upon external tamper detection. |
Key Features
| Feature | Design Value |
|---|---|
| Turnkey TPM Firmware | Pre-integrated, TCG-certified firmware eliminates need for custom TPM stack development - reduces BIOS integration time and qualification risk for OEMs. |
| Hardware Crypto Engine | Dedicated AES-128, SHA-1, and RSA-2048 accelerators offload CPU during attestation and sealing - enables sub-100 ms quote generation in resource-constrained embedded hosts. |
| FIPS-140-2 RNG | On-chip true random number generator validated to FIPS-140-2 Annex C - provides cryptographically secure entropy for key generation without external entropy sources. |
| GPIO Express-00 | NV-indexed GPIO mapped to TPM_NV_INDEX_GPIO_00 - enables persistent configuration of board-specific I/O states (e.g., secure debug enable/disable) across reboots. |
| Tamper Response | XTamper input triggers immediate key zeroization and TPM lockdown - meets physical security requirements for payment terminals and industrial HSMs. |
Applications
| Secure Desktop/Server Boot | Industrial Embedded Authentication |
|---|---|
|
Use Scenario: Enabling UEFI Secure Boot and Windows BitLocker encryption on x86 motherboards and server blades. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust providing measured boot log, sealed storage, and attestation of firmware integrity. Use Value: Prevents unauthorized firmware modification and disk decryption by binding encryption keys to authenticated platform state - enforced via hardware-enforced PCR extension. |
Use Scenario: Securing firmware updates and device identity in programmable logic controllers (PLCs) and HMIs operating in harsh environments. IC Role / Device Role / Timing Role: Cryptographic anchor for certificate-based mutual authentication and signed firmware validation during field upgrade. Use Value: Ensures only authorized firmware images execute, using RSA-2048 signature verification and secure NV storage of public keys - compliant with IEC 62443-3-3 SL2. |
| Payment Terminal Integrity | Medical Device Data Provenance |
|
Use Scenario: PCI PTS-approved point-of-sale terminals requiring hardware-based key management and tamper evidence. IC Role / Device Role / Timing Role: FIPS-140-2 Level 2–certified module managing PIN encryption keys and detecting physical enclosure breach. Use Value: XTamper input triggers automatic zeroization of encryption keys upon case opening - satisfies PCI PTS v6.0 physical security requirements. |
Use Scenario: FDA-cleared diagnostic imaging devices storing audit logs and DICOM metadata with cryptographic integrity guarantees. IC Role / Device Role / Timing Role: Trusted timestamping and digital signing of patient data using HMAC-SHA1 and persistent NV storage. Use Value: Enables verifiable chain-of-custody for medical records via TPM-stamped signatures - supports HIPAA §164.304 and 21 CFR Part 11 compliance. |
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 | Same TCG 1.2/TIS 1.3 compliance; uses ARM-based core instead of AVR; supports LPC interface in addition to SPI. | LPC support enables legacy BIOS compatibility where SPI-only designs require firmware adaptation. | Select SLB9665 TT 1.2 when LPC interface is required or when migrating from Infineon-based reference designs. |
| Nuvoton NPCT750KB0GX | TCG 1.2 compliant; integrated 32-bit ARM Cortex-M0+; supports both SPI and I²C; includes built-in voltage supervisor. | I²C option simplifies integration in microcontroller-based edge nodes lacking SPI peripherals; voltage supervisor adds brown-out protection. | Select NPCT750KB0GX for cost-sensitive IoT gateways or battery-powered devices needing I²C connectivity and enhanced power monitoring. |
Compared with SLB9665 TT 1.2 and NPCT750KB0GX, the AT97SC3205-G3M45-00 offers proven AVR-based firmware stability and minimal SPI footprint, making it optimal for high-volume PC motherboard designs where TIS 1.3 SPI timing and BIOS driver maturity are prioritized over multi-interface flexibility.
Availability
AT97SC3205-G3M45-00 is available at Aetrix Electronics and suitable for secure desktop boot, industrial PLC authentication, and medical device data provenance requiring stable component supply, long-term lifecycle support, and traceable sourcing for regulated markets.
Supply support for AT97SC3205-G3M45-00 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 full support for legacy Atmel security products, including TPM modules, with documented firmware updates, reference drivers, and TCG certification maintenance.
The AT97SC3205-G3M45-00 belongs to Atmel's Trusted Platform Module product line, designed specifically to deliver drop-in, standards-compliant hardware roots of trust for PC, server, and industrial embedded platforms requiring FIPS-validated cryptography.
FAQ
What is the primary interface protocol supported by the AT97SC3205-G3M45-00?
The AT97SC3205-G3M45-00 supports the Serial Peripheral Interface (SPI) protocol per TCG PC Client-Specific TPM Interface Specification (TIS) Version 1.3. It operates at up to 45 MHz with active-low SPI_CS#, SPI_RST#, and PIRQ# signals - enabling direct integration into x86 BIOS and ARM-based embedded host firmware without protocol translation.
Does the AT97SC3205-G3M45-00 include FIPS-140-2 certification?
Yes, the AT97SC3205-G3M45-00 is a FIPS-140-2 Level 2 certified module. Certification covers its hardware random number generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines - validating conformance to NIST SP 800-22 statistical tests and physical security requirements for cryptographic modules.
What package type is used for the AT97SC3205-G3M45-00?
The AT97SC3205-G3M45-00 uses a 32-pad Very Thin Quad Flat No-Lead (VQFN) package measuring 4.0 × 4.0 × 0.9 mm with 0.4 mm pitch. The exposed thermal pad is internally connected to GND, requiring soldering to the PCB ground plane for thermal dissipation and EMI control.
How does the AT97SC3205-G3M45-00 handle physical tampering events?
The AT97SC3205-G3M45-00 supports external tamper detection via the TestBI/GPIO/XTamper pin configured as XTamper. When asserted high, it triggers immediate zeroization of all sensitive cryptographic keys and locks the TPM - satisfying physical security requirements for PCI PTS and IEC 62443 deployments.
What is the purpose of the GPIO Express-00 pin on the AT97SC3205-G3M45-00?
The GPIO Express-00 pin on the AT97SC3205-G3M45-00 is mapped to TPM_NV_INDEX_GPIO_00 and provides nonvolatile, index-controlled I/O state retention. It allows system designers to store and retrieve board-specific configuration flags (e.g., debug enable/disable) persistently across reboots - extending TPM functionality beyond core crypto services.
AT97SC3205-G3M45-00 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-G3M45-00 FAQ
1.How can I place an order for AT97SC3205-G3M45-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205-G3M45-00 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-G3M45-00 reliable?
The price and inventory of AT97SC3205-G3M45-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205-G3M45-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3205-G3M45-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205-G3M45-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205-G3M45-00?
AT97SC3205-G3M45-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205-G3M45-00 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-G3M45-00?
For technical support, including AT97SC3205-G3M45-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205-G3M45-00 requirements.
6.How does Aetrix verify that AT97SC3205-G3M45-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205-G3M45-00 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-G3M45-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3205-G3M45-00?
All AT97SC3205-G3M45-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205-G3M45-00, 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-G3M45-00 part is unused and in its original packaging.
Return procedure for AT97SC3205-G3M45-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205-G3M45-00 Tags
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CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
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SLB9673XU20FW2613XTMA1
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CYPD3125-40LQXIT
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AT97SC3204-U2A1A-20
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AT97SC3204-U2A1A-10
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SLM9670AQ20FW1311XTMA1
Infineon Technologies
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SLB9672XU20FW1613XTMA1
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SLB9672AU20FW1613XTMA1
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SLB9673AU20FW2613XTMA1
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