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Microchip Technology AT97SC3205T-G3M4600B
- Part No.:
- AT97SC3205T-G3M4600B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M4600B.pdf
- Description:
- PRODFF COM I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:980
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Product details
Overview
AT97SC3205T-G3M4600B from Microchip (acquired Atmel) is a TCG-compliant Trusted Platform Module implementing TPM 1.2 specification, featuring an AVR RISC microprocessor, hardware RSA crypto engine, FIPS-140-2 certified RNG/AES/SHA/HMAC engines, and 2066-byte NV user storage. It operates at 3.3V with I²C interface up to 400 kHz and targets secure boot, platform integrity verification, and key management in embedded computing systems.
For engineers reviewing the AT97SC3205T-G3M4600B datasheet, AT97SC3205T-G3M4600B pinout, AT97SC3205T-G3M4600B application, or AT97SC3205T-G3M4600B equivalent, this page delivers verified package mapping (32-pin QFN), confirmed I²C timing constraints, validated GPIO-Express-00 and PP/GPIO roles, FIPS-140-2 certification scope, and low-power sleep recovery behavior via TWI_Wakeup#.
Technical Context
The AT97SC3205T-G3M4600B integrates a dedicated AVR 8-bit RISC CPU with on-chip EEPROM for RSA key storage and SRAM for runtime operations. Its cryptographic subsystem includes hardware-accelerated RSA, SHA-1, HMAC-SHA1, and AES-128 engines, all validated under FIPS-140-2 Level 2.
Communication occurs exclusively over I²C (SM_DAT/SM_CLK) supporting 100 kHz standard mode and 400 kHz fast mode with strict pull-up requirements (800 Ω on SM_DAT, 1.5 kΩ on SM_CLK). The device implements TCG-defined command sets and supports TPM_DeepSleep with dual active-low TWI_Wakeup# pins for low-power state recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification compliant; enables standardized platform attestation and sealed storage. |
| I²C Interface Speed | Up to 400 kHz fast mode; requires precise pull-up values (800 Ω SM_DAT, 1.5 kΩ SM_CLK) for stable operation. |
| FIPS Certification | FIPS-140-2 Level 2 certified for RNG, HMAC, AES, SHA, and RSA engines; validates cryptographic integrity for regulated environments. |
| NV User Storage | 2066 bytes of non-volatile storage accessible via TPM_NV_Write/Read commands; usable for firmware keys or configuration tokens. |
| Supply Voltage | 3.3 V ±10%; requires local decoupling (2200–4700 pF within 5 mm of each VCC pin, plus 0.1 µF shared node). |
| Operating Temperature | -40°C to +85°C industrial range; supports deployment in extended-temperature embedded platforms. |
| Package Type | 32-pad QFN (32M3), 4.0 × 4.0 × 0.90 mm body, 0.40 mm pitch; exposes GND thermal pad tied internally to ground. |
Pinout & Package
AT97SC3205T-G3M4600B uses the 32-pad QFN (32M3) package: 4.0 × 4.0 mm body, 0.40 mm pitch, exposed GND thermal pad. Pinout validated per Atmel-8883AS datasheet summary.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires dedicated high-frequency decoupling capacitors placed within 5 mm of each pin. |
| GND | Ground reference | System ground; thermal pad is internally connected to GND and may be soldered for thermal dissipation. |
| SM_DAT | I²C bidirectional data line | Open-drain I²C data; requires external 800 Ω pull-up for reliable 400 kHz operation. |
| SM_CLK | I²C clock input | Open-drain I²C clock; requires external 1.5 kΩ pull-up and near-50% duty cycle for timing stability. |
| PP/GPIO | Hardware physical presence indicator | Active-high signal indicating physical access; internal pull-down; left floating if unused. |
| GPIO-Express-00 | Dedicated NV-indexed GPIO | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; used for platform-specific status signaling or tamper detection. |
| TWI_Wakeup# | Low-power sleep recovery trigger | Two independent active-low pins required simultaneously to exit TPM_DeepSleep mode. |
| PIRQ# | Interrupt request output | Active-low interrupt asserted by TPM to host upon command completion or event notification. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 implementation | Eliminates external microcontroller or firmware integration effort; reduces BOM count and attack surface. |
| FIPS-140-2 Level 2 certified crypto engines | Validates RNG entropy quality and algorithm correctness for use in government and financial applications. |
| Internal EEPROM for RSA keys | Securely stores multiple asymmetric key pairs without exposing private keys to host memory or software stack. |
| Hardware Physical Presence (PP) support | Enables user-authorized critical operations (e.g., clearing TPM state) via dedicated hardware signal path. |
| TPM_DeepSleep with dual wake-up pins | Reduces system standby power by >90% while maintaining secure state; requires coordinated assertion of both TWI_Wakeup# pins. |
Applications
| Secure Boot Verification | Platform Integrity Attestation |
|---|---|
Use Scenario: Verifying firmware image hash before execution in industrial gateways. IC Role / Device Role / Timing Role: TPM acts as root-of-trust during boot sequence, measuring BIOS, bootloader, and OS components into PCR registers. Use Value: Prevents unauthorized firmware modification by cryptographically binding execution to measured hashes stored in protected PCRs. | Use Scenario: Remote validation of endpoint health in cloud-managed edge servers. IC Role / Device Role / Timing Role: Generates signed quotes of PCR values upon host request via I²C, enabling remote attestation. Use Value: Allows cloud service to verify unmodified platform configuration before granting access to sensitive workloads. |
| Hardware-Based Key Management | Secure Firmware Update |
Use Scenario: Storing and using device-unique TLS client certificates in networked medical devices. IC Role / Device Role / Timing Role: Generates, stores, and performs RSA signing operations on private keys inside tamper-resistant hardware. Use Value: Ensures private keys never leave the AT97SC3205T-G3M4600B boundary, mitigating extraction via memory dump or side-channel attacks. | Use Scenario: Authenticating and decrypting OTA firmware updates in automotive telematics units. IC Role / Device Role / Timing Role: Validates update signature using embedded public key and decrypts payload with AES-128 using key unwrapped from NV storage. Use Value: Guarantees firmware authenticity and confidentiality without exposing decryption keys to host processor or flash memory. |
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 SLB9665TT2.0 | Supports both I²C and SPI interfaces; includes optional LPC interface; higher max I²C speed (1 MHz); no AVR core - uses proprietary secure processor. | Broader host interface flexibility; supports legacy x86 platforms with LPC; lacks GPIO-Express-00 and PP/GPIO pin semantics defined in AT97SC3205T-G3M4600B. | Select when SPI/LPC compatibility or higher I²C bandwidth is required; not drop-in due to different pinout and GPIO mapping. |
| Nuvoton NPCT750KB0GX | TPM 2.0 compliant; supports SHA-256 and ECC; 3.3 V operation; 32-pin QFN package; includes additional debug disable fuse and enhanced physical tamper detection. | Required for new designs targeting TPM 2.0 mandates; supports modern cryptographic algorithms but incompatible with TPM 1.2-only stacks. | Select for future-proofing and compliance with latest TCG standards; migration requires firmware and driver changes. |
Compared with SLB9665TT2.0 and NPCT750KB0GX, the AT97SC3205T-G3M4600B offers deterministic TPM 1.2 behavior with integrated AVR-based command processing and dedicated GPIO-Express-00 for platform-specific extensions - making it optimal for cost-sensitive, I²C-only embedded systems requiring FIPS-140-2 Level 2 assurance without interface expansion.
Availability
AT97SC3205T-G3M4600B is available at Aetrix Electronics and suitable for secure boot verification, platform integrity attestation, hardware-based key management, and secure firmware update applications requiring stable component supply across industrial temperature ranges.
Supply support for AT97SC3205T-G3M4600B 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 ICs including the AT97SC3205T series.
The AT97SC3205T-G3M4600B belongs to Atmel's TPM product line designed specifically for embedded systems needing certified, single-chip trusted execution environments with minimal host dependency.
FAQ
What is the primary interface protocol supported by the AT97SC3205T-G3M4600B?
The AT97SC3205T-G3M4600B supports only the I²C interface (SM_DAT and SM_CLK pins) operating at 100 kHz standard mode or 400 kHz fast mode. It does not support SPI, LPC, or UART interfaces. Pull-up resistors must be sized precisely (800 Ω on SM_DAT, 1.5 kΩ on SM_CLK) to ensure reliable communication at 400 kHz, as specified in the Atmel-8883AS datasheet summary.
Does the AT97SC3205T-G3M4600B include certified cryptographic modules?
Yes, the AT97SC3205T-G3M4600B incorporates FIPS-140-2 Level 2 certified modules for its Random Number Generator (RNG), HMAC-SHA1, AES-128, SHA-1, and RSA engines. This certification covers the hardware implementation and firmware execution paths used for key generation, hashing, encryption, and digital signatures - providing verifiable assurance for regulated deployments.
How is low-power operation managed in the AT97SC3205T-G3M4600B?
The AT97SC3205T-G3M4600B enters low-power sleep automatically during idle periods. To exit this state, the host must assert both TWI_Wakeup# pins (pins 7 and 22 in QFN layout) low simultaneously, triggering recovery from TPM_DeepSleep. No external wake-up controller is needed, but timing coordination between both signals is mandatory per the datasheet.
What GPIO functionality is available on the AT97SC3205T-G3M4600B?
The AT97SC3205T-G3M4600B provides three configurable GPIOs: PP/GPIO (hardware physical presence indicator with internal pull-down), GPIO-Express-00 (NV-indexed GPIO with internal pull-up mapped to TPM_NV_INDEX_GPIO_00), and TestBI/GPIO/XTAMPER (dual-function pin usable as GPIO or tamper sensor). Unused GPIOs should be tied appropriately per datasheet guidance.
Is the AT97SC3205T-G3M4600B compatible with TPM 2.0 software stacks?
No, the AT97SC3205T-G3M4600B implements only the TCG TPM 1.2 specification and is not compatible with TPM 2.0 command sets, algorithms (e.g., SHA-256, ECC), or authorization logic. Software stacks expecting TPM 2.0 features will fail initialization or return unsupported command errors when interfacing with the AT97SC3205T-G3M4600B.
AT97SC3205T-G3M4600B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Trusted Platform Module (TPM)
- Core Processor:
- AVR
- Program Memory Type:
- EEPROM
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- I2C
- 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)
AT97SC3205T-G3M4600B FAQ
1.How can I place an order for AT97SC3205T-G3M4600B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M4600B 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 AT97SC3205T-G3M4600B reliable?
The price and inventory of AT97SC3205T-G3M4600B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-G3M4600B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M4600B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M4600B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M4600B?
AT97SC3205T-G3M4600B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M4600B 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 AT97SC3205T-G3M4600B?
For technical support, including AT97SC3205T-G3M4600B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M4600B requirements.
6.How does Aetrix verify that AT97SC3205T-G3M4600B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M4600B 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 AT97SC3205T-G3M4600B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M4600B?
All AT97SC3205T-G3M4600B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M4600B, 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 AT97SC3205T-G3M4600B part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M4600B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M4600B Tags
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