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Microchip Technology AT97SC3205T-H3M44-10
- Part No.:
- AT97SC3205T-H3M44-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-H3M44-10.pdf
- Description:
- PROD STD IND I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,058
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Product details
Overview
AT97SC3205T-H3M44-10 from Microchip Technology (formerly Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC integrating an AVR® RISC microprocessor, hardware asymmetric crypto engine, FIPS-140-2 certified RNG/AES/SHA/RSA engines, and 2066-byte NV user storage. It operates at 3.3V with I²C interface (400 kHz Fast Mode) and targets secure boot, platform authentication, and key management in embedded computing systems.
For engineers reviewing the AT97SC3205T-H3M44-10 datasheet, AT97SC3205T-H3M44-10 pinout, AT97SC3205T-H3M44-10 application, or AT97SC3205T-H3M44-10 equivalent, this page delivers verified package mapping (32-pad QFN), confirmed I²C timing constraints, GPIO-Express-00 and PP/GPIO functional roles, low-power TWI_Wakeup# recovery behavior, and FIPS-140-2 module certification scope.
Technical Context
The AT97SC3205T-H3M44-10 implements the full TCG TPM 1.2 specification stack in hardware, including command parsing, cryptographic acceleration, and secure non-volatile key storage in internal EEPROM. Its AVR CPU executes firmware that enforces strict physical and logical security boundaries between host commands and crypto operations.
It supports dual I²C speed modes (100 kHz Standard / 400 kHz Fast), requires precise SM_DAT/SM_CLK pull-up values (800 Ω and 1.5 kΩ respectively) for stable high-speed operation, and enters automatic low-power sleep when idle-recoverable only via coordinated TWI_Wakeup# pin pulsing per Atmel-specific TPM_DeepSleep command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 specification implementation, enabling standardized platform integrity attestation and sealed storage. |
| I²C Interface Speed | 400 kHz Fast Mode or 100 kHz Standard Mode; requires 800 Ω pull-up on SM_DAT and 1.5 kΩ on SM_CLK for reliable 400 kHz operation. |
| Supply Voltage | 3.3 V ±10%; decoupling mandates 2200–4700 pF capacitors within 5 mm of each VCC pin and 0.1 µF at VCC node junction. |
| FIPS Certification | FIPS-140-2 Level 2 certified module covering RNG, HMAC, AES, SHA, and RSA engines-validates cryptographic integrity for regulated deployments. |
| NV User Storage | 2066 bytes of persistent user-defined data space mapped to TPM_NV_INDEX addresses, accessible via standard TCG commands. |
| Operating Temperature | -40°C to +85°C industrial range; validated across thermal stress for long-term reliability in embedded control environments. |
| Package Type | 32-pad QFN (32M3), 4.0 × 4.0 × 0.90 mm body, 0.40 mm pitch, exposed thermal pad tied internally to GND. |
Pinout & Package
AT97SC3205T-H3M44-10 uses the 32-pad Very Thin QFN (32M3) package: 4.0 × 4.0 mm body, 0.40 mm pitch, exposed center thermal pad internally connected to GND. Pin 1 identifier located at top-left corner (clockwise numbering).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires dedicated local decoupling (2200–4700 pF) and system-level 0.1 µF bypass; noise sensitivity mandates strict layout rules. |
| GND | Ground reference | System ground return; center thermal pad is electrically tied to GND and must be soldered for thermal and electrical integrity. |
| SM_DAT / SM_CLK | I²C bidirectional data / clock | Standard I²C interface pins; SM_DAT pull-up = 800 Ω, SM_CLK pull-up = 1.5 kΩ for 400 kHz operation; duty cycle near 50% improves stability. |
| PP/GPIO | Hardware Physical Presence indicator | Active-high signal indicating physical access; internal pull-down; floats high when asserted; used for BIOS-level TPM enable/disable confirmation. |
| GPIO-Express-00 | Pre-mapped NV-accessible GPIO | Hardwired to TPM_NV_INDEX_GPIO_00; internal pull-up; serves as XOR chain output during I/O test mode; default input configuration. |
| TWI_Wakeup# | Low-power recovery trigger | Two-pin active-low wakeup sequence required to exit TPM_DeepSleep state; both pins must be pulsed low synchronously to resume operation. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates CPU, crypto engines, RNG, EEPROM, and I²C interface in one die-eliminates external co-processors and reduces BOM count and board area. |
| FIPS-140-2 Level 2 certification | Covers RNG entropy quality, AES/SHA/RSA algorithm correctness, and tamper-resistant firmware execution-meets U.S. federal and enterprise security policy requirements. |
| Hardware asymmetric crypto engine | Accelerates RSA key generation, signing, and verification offloading host CPU; enables fast attestation and remote provisioning without software crypto overhead. |
| Internal EEPROM for RSA keys | Securely stores multiple private keys in tamper-resistant memory; managed automatically by firmware-no host-side key cache or volatile RAM exposure. |
| Dynamic low-power sleep mode | Enters ultra-low-power state automatically during I²C idle periods; recovery requires explicit TWI_Wakeup# handshake-prevents unauthorized wake events. |
Applications
| Secure Boot Authentication | Platform Integrity Attestation |
|---|---|
Use Scenario: Verifying firmware signature and measurement chain before OS load in industrial gateways and medical devices. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor; performs SHA-1/SHA-256 hashing and RSA signature validation during Power-On Self-Test (POST). Use Value: Prevents execution of tampered or unsigned firmware; ensures only cryptographically signed bootloader and kernel images execute. | Use Scenario: Reporting runtime system measurements (PCR values) to cloud-based security services for remote health monitoring. IC Role / Device Role / Timing Role: TPM generates and signs PCR digests using its internal RSA key; transmits attestations over I²C to host MCU for network forwarding. Use Value: Enables real-time detection of unauthorized configuration changes or malware injection-critical for OT security compliance. |
| Hardware-Bound Key Storage | Physical Presence Enforcement |
Use Scenario: Storing device-unique encryption keys for encrypted SSDs or secure element communication in edge AI appliances. IC Role / Device Role / Timing Role: TPM serves as isolated key vault; encrypts/decrypts keys using internal AES engine and binds them to platform state (PCR values). Use Value: Keys never leave TPM boundary; binding prevents extraction and reuse on cloned or compromised hardware. | Use Scenario: Enabling BIOS-level TPM activation only after technician confirms physical access via front-panel button press. IC Role / Device Role / Timing Role: PP/GPIO pin monitors hardware switch; TPM firmware validates physical presence flag before allowing sensitive operations (e.g., Clear Owner). Use Value: Mitigates remote privilege escalation attacks by requiring human-in-the-loop for critical administrative actions. |
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 SLB9670 | Same TCG TPM 1.2 compliance; supports SPI interface in addition to I²C; larger 32-pin QFN footprint (5 × 5 mm); no AVR CPU-uses proprietary secure core. | Preferred where SPI host interface is mandatory or where Infineon's broader TPM 2.0 migration path is planned. | Select SLB9670 if SPI compatibility or future TPM 2.0 upgradeability is required; verify PCB layout accommodates larger QFN body. |
| Nuvoton NPCT750 | TCG TPM 1.2 compliant; integrated ARM Cortex-M0+ instead of AVR; supports both I²C and LPC interfaces; includes additional tamper-detection sensors. | Better suited for PC-class motherboards with LPC bus or designs requiring enhanced physical tamper response (e.g., voltage/temperature monitoring). | Choose NPCT750 for LPC-based platforms or when advanced tamper sensing beyond basic GPIO is needed; confirm firmware support for M0+ architecture. |
Compared with SLB9670 and NPCT750, the AT97SC3205T-H3M44-10 offers tighter integration of AVR-based firmware control with FIPS-140-2 certified crypto engines in a compact 4 × 4 mm QFN, making it optimal for space-constrained industrial controllers where I²C-only connectivity and deterministic low-power behavior are prioritized.
Availability
AT97SC3205T-H3M44-10 is available at Aetrix Electronics and suitable for secure boot authentication, platform integrity attestation, hardware-bound key storage, and physical presence enforcement requiring stable component supply across industrial temperature ranges.
Supply support for AT97SC3205T-H3M44-10 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 full support for legacy Atmel security products. The company specializes in microcontrollers, analog, and security solutions for industrial, automotive, and communications markets.
The AT97SC3205T-H3M44-10 belongs to Atmel's Trusted Platform Module product line, designed specifically to deliver certified, single-chip TPM 1.2 functionality for embedded systems needing hardware-rooted trust without external crypto co-processors.
FAQ
What is the primary security certification applicable to the AT97SC3205T-H3M44-10?
The AT97SC3205T-H3M44-10 is FIPS-140-2 Level 2 certified as a complete module, covering its hardware random number generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines. This certification validates the implementation's resistance to physical and logical attacks and confirms algorithmic correctness under NIST standards-making the AT97SC3205T-H3M44-10 suitable for U.S. federal and regulated enterprise deployments requiring cryptographic assurance.
Does the AT97SC3205T-H3M44-10 support both I²C Standard and Fast Mode speeds?
Yes, the AT97SC3205T-H3M44-10 supports I²C Standard Mode (100 kHz) and Fast Mode (400 kHz). For reliable 400 kHz operation, the datasheet specifies 800 Ω pull-up on SM_DAT and 1.5 kΩ on SM_CLK, with emphasis on maintaining near-50% duty cycle on SM_CLK. The AT97SC3205T-H3M44-10 automatically negotiates speed based on host clock frequency and does not require firmware configuration to switch modes.
How is low-power operation managed in the AT97SC3205T-H3M44-10?
The AT97SC3205T-H3M44-10 enters low-power sleep automatically during I²C idle periods without host intervention. To resume operation, the host must pulse both TWI_Wakeup# pins low in sequence per the TPM_DeepSleep command protocol. This two-pin wakeup requirement prevents spurious wake events and ensures intentional recovery-distinct from simple reset-based wake mechanisms used in other TPMs.
What is the function of the PP/GPIO pin on the AT97SC3205T-H3M44-10?
The PP/GPIO pin on the AT97SC3205T-H3M44-10 serves dual roles: as a Hardware Physical Presence indicator (active-high) and as a general-purpose input/output. In TPM mode, it signals physical access confirmation to the firmware-required before executing sensitive commands like Clear Owner. It features an internal pull-down resistor and should be left floating if unused, ensuring default low state until asserted by external hardware.
Can the AT97SC3205T-H3M44-10 store custom user data, and how much space is available?
Yes, the AT97SC3205T-H3M44-10 provides 2066 bytes of non-volatile user-defined data storage mapped to TPM_NV_INDEX addresses. This space is separate from cryptographic key storage and is accessible via standard TCG commands such as TPM_NV_Write and TPM_NV_Read. The AT97SC3205T-H3M44-10 manages wear leveling and access permissions in firmware, enabling secure, persistent storage of configuration tokens, certificates, or audit logs.
AT97SC3205T-H3M44-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205T-H3M44-10 FAQ
1.How can I place an order for AT97SC3205T-H3M44-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-H3M44-10 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 AT97SC3205T-H3M44-10 reliable?
The price and inventory of AT97SC3205T-H3M44-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-H3M44-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-H3M44-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-H3M44-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-H3M44-10?
AT97SC3205T-H3M44-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-H3M44-10 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 AT97SC3205T-H3M44-10?
For technical support, including AT97SC3205T-H3M44-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-H3M44-10 requirements.
6.How does Aetrix verify that AT97SC3205T-H3M44-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-H3M44-10 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 AT97SC3205T-H3M44-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-H3M44-10?
All AT97SC3205T-H3M44-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-H3M44-10, 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 AT97SC3205T-H3M44-10 part is unused and in its original packaging.
Return procedure for AT97SC3205T-H3M44-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-H3M44-10 Tags
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