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Microchip Technology AT97SC3205T-H3M4410B
- Part No.:
- AT97SC3205T-H3M4410B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-H3M4410B.pdf
- Description:
- PROD STD IND I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,541
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Product details
Overview
AT97SC3205T-H3M4410B from 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 up to 400kHz and targets secure boot, platform integrity verification, and key management in embedded systems.
For engineers reviewing the AT97SC3205T-H3M4410B datasheet, AT97SC3205T-H3M4410B pinout, AT97SC3205T-H3M4410B application, or AT97SC3205T-H3M4410B equivalent, this page delivers verified package mapping (32-pin QFN), confirmed I²C timing constraints, GPIO-Express-00 and PP/GPIO roles, TWI_Wakeup# deep-sleep recovery behavior, and FIPS-140-2 module certification scope.
Technical Context
The AT97SC3205T-H3M4410B implements the full TCG TPM 1.2 specification stack in silicon, including command parsing, cryptographic acceleration, and secure non-volatile key storage. Its AVR CPU executes firmware that enforces strict physical and logical security boundaries between host commands and internal RSA key operations.
It supports dual I²C modes (100kHz standard / 400kHz fast), requires precise SM_DAT/SM_CLK pull-up values (800Ω and 1.5kΩ respectively for 400kHz), and uses dedicated pins-PP/GPIO for hardware physical presence assertion and TWI_Wakeup# for synchronized low-power exit via TPM_DeepSleep command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 specification implementation per TCG Main Specification Parts 1–3; enables standardized platform attestation and sealed storage. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES, SHA-1, and RSA (up to 2048-bit); offloads host CPU for secure key generation and signing. |
| I²C Interface | 400kHz Fast Mode / 100kHz Standard Mode; requires 800Ω pull-up on SM_DAT and 1.5kΩ on SM_CLK for stable high-speed operation. |
| Supply Voltage | 3.3V ±10%; decoupling mandates 2200–4700pF capacitors <5mm from each VCC pin and 0.1μF at VCC node <10mm from device. |
| NV Storage | 2066 bytes user-defined NV space; persistent across power cycles and used for credentials, policies, or custom TPM_NV_INDEX data. |
| Operating Temp | Industrial range: −40°C to +85°C; validated for extended thermal stability in industrial control and network infrastructure. |
| Package | 32-pad QFN (4.0×4.0×0.90 mm, 0.40 mm pitch); exposed thermal pad tied internally to GND for improved heat dissipation. |
Pinout & Package
AT97SC3205T-H3M4410B is supplied in a 32-pad Very Thin QFN (32M3) package with 0.40 mm pitch and 4.0×4.0 mm body. The exposed center pad is internally connected to GND and may be left floating or soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply | 3.3V main supply; requires localized decoupling (2200–4700pF <5mm from pin) and system-level 0.1μF bypass (<10mm). |
| GND | Ground Reference | System ground return; center thermal pad is internally tied to GND and enhances thermal conduction. |
| SM_DAT / SM_CLK | I²C Data/Clock | Open-drain bidirectional interface; 400kHz operation requires 800Ω (DAT) and 1.5kΩ (CLK) pull-ups for signal integrity. |
| PP/GPIO | Physical Presence Input | Active-high hardware presence indicator; internal pull-down; must be asserted externally to enable privileged TPM commands. |
| TWI_Wakeup# | Deep-Sleep Recovery | Two-pin active-low wake mechanism; both pins must be pulsed low to exit TPM_DeepSleep state. |
| GPIO-Express-00 | Configurable GPIO | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; serves as XOR chain output during I/O test mode. |
| PIRQ# | Interrupt Output | Active-low interrupt request to host; signals completion of long-running TPM commands (e.g., RSA key generation). |
| NC (Pins 7,10,11,13–16,25–28,31) | No Connect | Electrically unconnected; may be left floating, tied to GND, or tied to VCC per board layout requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates AVR CPU, crypto accelerators, EEPROM key storage, and I²C interface in one die-eliminates external co-processors and reduces BOM count. |
| FIPS-140-2 Level 2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines; validates cryptographic integrity and physical tamper resistance for government and regulated industries. |
| Hardware Physical Presence (PP) | Dedicated PP/GPIO pin enforces operator-confirmed authorization before sensitive operations (e.g., clearing owner hierarchy), preventing remote privilege escalation. |
| Low-power deep-sleep mode | TPM_DeepSleep command reduces current draw significantly; recovery requires coordinated TWI_Wakeup# pulse on two pins-prevents accidental wake events. |
| Secure NV user storage | 2066-byte partitioned space accessible only via authenticated TPM_NV_Write/Read; isolated from TPM-internal keys and resistant to replay or overwrite attacks. |
Applications
| Server Platform Integrity | Industrial Control Authentication |
|---|---|
Use Scenario: Verifying BIOS/firmware integrity during boot and measuring runtime software stacks in rack-mounted servers. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust; performs SHA-1 hashing of firmware blocks and stores PCR values in protected registers. Use Value: Enables remote attestation via TCG-compliant protocols, ensuring only authorized firmware runs before OS load. | Use Scenario: Securing firmware updates and authenticating field devices in programmable logic controllers (PLCs) and HMIs. IC Role / Device Role / Timing Role: Secure credential vault and signature verifier; signs update packages using stored RSA private keys. Use Value: Prevents unauthorized firmware injection by validating digital signatures prior to flash programming. |
| Embedded Edge Gateway Security | Medical Device Data Protection |
Use Scenario: Establishing TLS mutual authentication and encrypting sensor telemetry in IoT edge gateways. IC Role / Device Role / Timing Role: Hardware-backed key store and crypto accelerator; generates ephemeral ECDH keys and signs handshake messages. Use Value: Offloads PKI operations from host MCU, enabling strong TLS 1.2 without compromising real-time latency. | Use Scenario: Protecting patient data logs and enforcing access control in diagnostic imaging equipment. IC Role / Device Role / Timing Role: FIPS-140-2 certified secure element; seals audit logs and encrypts stored DICOM metadata using AES-128. Use Value: Meets HIPAA and IEC 62304 requirements for cryptographic assurance and tamper-evident logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665TT2.0 | Same TPM 1.2 compliance, 32-pin QFN, but uses SPI interface instead of I²C; no PP/GPIO pin; different RNG certification level (FIPS-140-2 Level 1). | Requires SPI host controller and lacks hardware physical presence enforcement; suitable where host-side policy control replaces operator confirmation. | Select when SPI interface is preferred and physical presence is managed in software or external logic. |
| Nuvoton NPCT650KBAX | TPM 1.2 compliant, 32-pin QFN, I²C interface at 400kHz, includes PP pin-but lacks FIPS-140-2 certification and has smaller NV storage (1024 bytes). | Acceptable for cost-sensitive industrial designs where formal cryptographic validation is not mandated; limited user NV space restricts policy complexity. | Select for non-regulated environments needing basic TPM functionality without FIPS validation overhead. |
Compared with SLB9665TT2.0 and NPCT650KBAX, the AT97SC3205T-H3M4410B uniquely combines I²C interface, hardware PP enforcement, FIPS-140-2 Level 2 certification, and 2066-byte NV storage-making it optimal for industrial and medical systems requiring auditable, physically secured TPM deployment.
Availability
AT97SC3205T-H3M4410B is available at Aetrix Electronics and suitable for server platform integrity verification, industrial control authentication, and embedded edge gateway security requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT97SC3205T-H3M4410B 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 company specializing in microcontrollers, nonvolatile memory, and security ICs for embedded applications.
The AT97SC3205T product line delivers certified, single-chip TPM 1.2 modules targeting industrial, medical, and network infrastructure systems requiring hardware-rooted trust and FIPS-validated cryptography.
FAQ
What is the primary interface protocol supported by the AT97SC3205T-H3M4410B?
The AT97SC3205T-H3M4410B supports I²C communication exclusively, operating at 100kHz (Standard Mode) or 400kHz (Fast Mode). It does not support SPI or LPC interfaces. Pull-up resistors of 800Ω on SM_DAT and 1.5kΩ on SM_CLK are required for reliable 400kHz operation, as specified in the official summary datasheet.
Does the AT97SC3205T-H3M4410B include FIPS-140-2 certification, and what components does it cover?
Yes, the AT97SC3205T-H3M4410B is FIPS-140-2 Level 2 certified, covering its hardware random number generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines. This certification validates the integrity and resistance to physical and logical attacks for these specific subsystems, as documented in Atmel's official compliance report referenced in the datasheet summary.
How does the hardware Physical Presence (PP) function work on the AT97SC3205T-H3M4410B?
The PP/GPIO pin on the AT97SC3205T-H3M4410B is an active-high input with an internal pull-down resistor. It must be asserted externally to enable privileged TPM commands such as Clear, OwnerClear, or TakeOwnership. This ensures operator presence is physically confirmed before irreversible security operations, satisfying TCG TPM 1.2 physical presence requirements.
What is the purpose and behavior of the TWI_Wakeup# pins on the AT97SC3205T-H3M4410B?
The TWI_Wakeup# pins (two dedicated terminals) enable recovery from the low-power deep-sleep state initiated by the TPM_DeepSleep command. Both pins must be pulsed active-low simultaneously to exit sleep mode. If unused, Pin 7 may float or tie to GND; Pin 22 must be tied to GND or VCC-ensuring deterministic wake behavior and preventing spurious exits.
What package type and thermal characteristics apply to the AT97SC3205T-H3M4410B?
The AT97SC3205T-H3M4410B uses a 32-pad Very Thin QFN (32M3) package: 4.0×4.0×0.90 mm body, 0.40 mm pitch, with an exposed center pad internally connected to GND. This pad improves thermal dissipation and may be soldered to a PCB ground plane; no external heatsink is required under typical industrial operating conditions.
AT97SC3205T-H3M4410B 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-H3M4410B FAQ
1.How can I place an order for AT97SC3205T-H3M4410B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-H3M4410B 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-H3M4410B reliable?
The price and inventory of AT97SC3205T-H3M4410B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-H3M4410B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-H3M4410B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-H3M4410B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-H3M4410B?
AT97SC3205T-H3M4410B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-H3M4410B 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-H3M4410B?
For technical support, including AT97SC3205T-H3M4410B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-H3M4410B requirements.
6.How does Aetrix verify that AT97SC3205T-H3M4410B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-H3M4410B 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-H3M4410B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-H3M4410B?
All AT97SC3205T-H3M4410B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-H3M4410B, 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-H3M4410B part is unused and in its original packaging.
Return procedure for AT97SC3205T-H3M4410B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-H3M4410B Tags
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