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Microchip Technology AT97SC3205T-G3M4410B
- Part No.:
- AT97SC3205T-G3M4410B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M4410B.pdf
- Description:
- PROD STD COM I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,123
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Product details
Overview
AT97SC3205T-G3M4410B from Microchip (acquired 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 400 kHz and targets secure boot, platform integrity verification, and key management in embedded systems.
For engineers reviewing the AT97SC3205T-G3M4410B datasheet, AT97SC3205T-G3M4410B pinout, AT97SC3205T-G3M4410B application, or AT97SC3205T-G3M4410B 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-G3M4410B 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 isolation between host-accessible registers and protected crypto operations.
It supports dual I²C modes (100 kHz standard / 400 kHz fast), requires precise SM_DAT/SM_CLK pull-up values (800 Ω and 1.5 kΩ respectively) for reliable high-speed communication, and enters automatic low-power sleep when idle-recoverable only via coordinated TWI_Wakeup# pin pulsing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 specification implementation per TCG Main Spec Parts 1–3; enables standardized attestation and sealed storage. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES, SHA-1, and RSA; hardware-accelerated signing/decryption without host CPU involvement. |
| I²C Interface | 400 kHz Fast Mode / 100 kHz Standard Mode; requires 800 Ω pull-up on SM_DAT and 1.5 kΩ on SM_CLK for stable high-speed operation. |
| Supply Voltage | 3.3 V ±10%; mandates tight decoupling: 2200–4700 pF caps <5 mm from each VCC–GND pair plus 0.1 µF cap <10 mm at VCC node. |
| Non-Volatile Storage | 2066 bytes user-defined NV space; persistent across power cycles and used for credentials, policies, and configuration data. |
| Operating Temp | Industrial range: −40 °C to +85 °C; validated for extended thermal stability in industrial control and networking equipment. |
| Package | 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-G3M4410B uses the 32-pad QFN (32M3) package: 4.0 × 4.0 mm body, 0.40 mm pitch, exposed center thermal pad internally connected to GND. Pin 1 marked by top-side dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires dedicated local decoupling per datasheet layout rules to prevent crypto operation failure. |
| GND | Ground reference | System ground return; center thermal pad is electrically GND and must be soldered for thermal and EMI performance. |
| SM_DAT | I²C bidirectional data line | Open-drain I²C data; 800 Ω pull-up required for 400 kHz operation; shared with internal EEPROM programming path. |
| SM_CLK | I²C clock input | Input-only clock; 1.5 kΩ pull-up recommended; 50% duty cycle improves timing margin at max speed. |
| PP/GPIO | Physical presence indicator | Active-high hardware presence signal; internal pull-down; used to assert admin-level TPM commands like Clear or Disable. |
| GPIO-Express-00 | TPM_NV_INDEX_GPIO_00 | Pre-mapped NV index GPIO; internal pull-up; floats if unused; serves as XOR chain output during I/O test mode. |
| TWI_Wakeup# | Low-power recovery trigger | Two-pin active-low wakeup sequence required to exit deep sleep; both pins must be pulsed low synchronously. |
| PIRQ# | Interrupt request output | Open-drain interrupt signal asserted by TPM to notify host of command completion or error condition. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates CPU, crypto engines, RNG, EEPROM, and I²C interface in one die-no external components needed for core TPM functionality. |
| 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 asymmetric crypto engine | Accelerates RSA key generation, signing, and decryption in hardware-reducing latency and eliminating host-side software vulnerabilities. |
| Internal EEPROM for RSA keys | Dedicated protected memory stores private keys with write-protection enforced by TPM firmware; keys never exposed to host memory bus. |
| Dynamic key cache management | Automatically loads/unloads keys from NV storage using TPM_FlushSpecific and TPM_LoadKey2-no host driver intervention required. |
Applications
| Secure Boot Authentication | Platform Integrity Verification |
|---|---|
Use Scenario: Verifying firmware signature before execution in industrial gateways and medical edge devices. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor; measures BIOS, bootloader, and OS loader into Platform Configuration Registers (PCRs) prior to execution. Use Value: Prevents unauthorized firmware modification by cryptographically binding boot sequence to hardware identity stored in AT97SC3205T-G3M4410B's protected NV storage. | Use Scenario: Detecting runtime tampering in network infrastructure equipment such as firewalls and SD-WAN appliances. IC Role / Device Role / Timing Role: TPM monitors critical system registers and logs changes to PCRs during operation; triggers alerts via PIRQ# on deviation. Use Value: Enables real-time attestation using AT97SC3205T-G3M4410B's hardware-accelerated SHA-1 engine and secure PCR update logic-no host CPU overhead. |
| Sealed Storage Encryption | Hardware-Based Key Management |
Use Scenario: Storing encrypted credentials for TLS mutual authentication in IoT gateways deployed in untrusted environments. IC Role / Device Role / Timing Role: TPM performs encryption/decryption of secrets using AES keys bound to specific PCR states; access denied if platform state changes. Use Value: Leverages AT97SC3205T-G3M4410B's 2066-byte NV user space and FIPS-certified AES engine to protect credentials-even if flash memory is physically extracted. | Use Scenario: Managing device identity keys in automotive telematics control units requiring long-term cryptographic lifecycle support. IC Role / Device Role / Timing Role: TPM generates, stores, and uses RSA key pairs within its isolated EEPROM; keys persist across reboots and firmware updates. Use Value: Eliminates need for external secure element; AT97SC3205T-G3M4410B's hardware RNG and RSA engine ensure cryptographically strong key material generation without host dependency. |
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 |
|---|---|---|---|
| ST33TPHF2XZ | 32-pin QFN, 3.3 V, TCG 1.2 compliant; includes additional SPI interface and enhanced side-channel protection. | Supports dual I²C/SPI host connectivity; suited for designs needing interface redundancy or higher throughput. | Select ST33TPHF2XZ if SPI host interface or stronger side-channel mitigation is required; AT97SC3205T-G3M4410B remains optimal for pure I²C-constrained layouts. |
| SLB9670 | 32-pin QFN, 3.3 V, TCG 1.2 compliant; offers extended temperature range (−40 °C to +105 °C) and ISO 15408 EAL4+ certification. | Validated for harsher thermal environments and formal evaluation assurance level requirements beyond FIPS-140-2. | Choose SLB9670 for automotive under-hood or military-grade deployments; AT97SC3205T-G3M4410B meets industrial-grade needs with lower cost and proven integration. |
Compared with ST33TPHF2XZ and SLB9670, the AT97SC3205T-G3M4410B provides identical TPM 1.2 functionality in a compact QFN package but lacks SPI support and extended temp certification-making it ideal for cost-sensitive industrial embedded systems where I²C is standard and −40 °C to +85 °C suffices.
Availability
AT97SC3205T-G3M4410B is available at Aetrix Electronics and suitable for secure boot authentication, platform integrity verification, and sealed storage encryption requiring stable component supply across industrial automation, medical edge devices, and network infrastructure programs.
Supply support for AT97SC3205T-G3M4410B 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 product support, documentation, and qualification for legacy Atmel security ICs including the AT97SC3205T series.
The AT97SC3205T product line delivers certified TPM 1.2 functionality for embedded platforms needing hardware-rooted trust-designed specifically for integration into resource-constrained industrial and networking equipment without external crypto co-processors.
FAQ
What is the primary compliance standard met by the AT97SC3205T-G3M4410B?
The AT97SC3205T-G3M4410B is fully compliant with the Trusted Computing Group (TCG) Trusted Platform Module (TPM) Version 1.2 Specification. It implements all mandatory commands, PCR architecture, and secure storage mechanisms defined in TCG Main Specification Parts 1–3. This compliance enables interoperability with industry-standard TPM software stacks and attestation services.
Does the AT97SC3205T-G3M4410B support both commercial and industrial temperature ranges?
Yes, the AT97SC3205T-G3M4410B is qualified for industrial operation from −40 °C to +85 °C. While the base part number AT97SC3205T is offered in both commercial (0 °C to 70 °C) and industrial grades, the specific variant AT97SC3205T-G3M4410B corresponds to the industrial temperature grade and is tested and screened accordingly.
How does the AT97SC3205T-G3M4410B handle low-power states?
The AT97SC3205T-G3M4410B automatically enters low-power sleep when idle. Recovery requires a synchronized active-low pulse on both TWI_Wakeup# pins-this two-pin handshake prevents spurious wakeups. The device draws minimal current in sleep mode, and no host software action is needed to initiate entry; only the wakeup sequence is host-controlled.
What is the function of the PP/GPIO pin on the AT97SC3205T-G3M4410B?
The PP/GPIO pin on the AT97SC3205T-G3M4410B serves as the Hardware Physical Presence indicator-active high-and defaults to GPIO input mode. When asserted, it enables privileged TPM commands such as Clear, Disable, or Activate. Its internal pull-down resistor means it should be left floating if unused, and it is electrically isolated from general-purpose GPIO functions unless explicitly configured.
Is the AT97SC3205T-G3M4410B FIPS-140-2 certified, and what modules are covered?
Yes, the AT97SC3205T-G3M4410B is FIPS-140-2 Level 2 certified. Certification covers the integrated hardware Random Number Generator (RNG), HMAC, AES, SHA-1, and RSA cryptographic engines. The certification applies to the complete module-including firmware, physical security circuitry, and key management logic-as validated in the official NIST certificate listing for this device family.
AT97SC3205T-G3M4410B 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205T-G3M4410B FAQ
1.How can I place an order for AT97SC3205T-G3M4410B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M4410B 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-G3M4410B reliable?
The price and inventory of AT97SC3205T-G3M4410B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-G3M4410B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M4410B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M4410B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M4410B?
AT97SC3205T-G3M4410B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M4410B 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-G3M4410B?
For technical support, including AT97SC3205T-G3M4410B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M4410B requirements.
6.How does Aetrix verify that AT97SC3205T-G3M4410B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M4410B 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-G3M4410B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M4410B?
All AT97SC3205T-G3M4410B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M4410B, 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-G3M4410B part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M4410B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M4410B Tags
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CYPD3175-24LQXQ
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SLB9672VU20FW1523XTMA1
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SLB9670VQ20FW785XTMA1
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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
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SLB9672XU20FW1613XTMA1
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SLB9672AU20FW1613XTMA1
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SLB9673AU20FW2613XTMA1
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