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Microchip Technology AT97SC3205T-G3M4610B
- Part No.:
- AT97SC3205T-G3M4610B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M4610B.pdf
- Description:
- PROD FF COM I2C TPM 4X4 32VQFN S
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
AT97SC3205T-G3M4610B 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 400kHz and supports industrial temperature range (−40°C to +85°C). Used in embedded systems requiring secure boot, key attestation, and platform integrity verification.
For engineers reviewing the AT97SC3205T-G3M4610B datasheet, AT97SC3205T-G3M4610B pinout, AT97SC3205T-G3M4610B application, or AT97SC3205T-G3M4610B equivalent, this page delivers verified technical context, package-specific pin roles, real-world use value per application, and validated alternative options for secure subsystem design.
Technical Context
The AT97SC3205T-G3M4610B implements the full TCG TPM 1.2 specification in silicon, with dedicated hardware acceleration for RSA key generation, HMAC, SHA-1 hashing, and AES encryption. Its internal EEPROM stores RSA keys and 2066 bytes of user-defined NV data, managed via TCG-standard commands including TPM_FlushSpecific and TPM_LoadKey2.
It features dual-package support: 28-pin Thin TSSOP (4.4 × 9.7 mm, 0.65 mm pitch) and 32-pad QFN (4.0 × 4.0 mm, 0.40 mm pitch), both RoHS-compliant and lead-free. Low-power operation includes TWI_Wakeup#-triggered deep sleep recovery and automatic idle-mode entry without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 specification implementation - enables standardized secure boot, remote attestation, and sealed storage across OS and firmware layers. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES-128, SHA-1, and RSA (up to 2048-bit) - hardware-accelerated cryptographic operations reduce CPU load and prevent software-side timing attacks. |
| I²C Interface | 400 kHz Fast Mode / 100 kHz Standard Mode - supports high-speed host communication with configurable pull-up values (800 Ω on SM_DAT, 1.5 kΩ on SM_CLK) for signal integrity. |
| Nonvolatile Storage | 2066 bytes user-defined NV space + internal EEPROM for RSA keys - persistent, tamper-resistant storage for credentials, policies, and measurement logs. |
| Supply & Temp | 3.3 V ±10%, −40°C to +85°C industrial grade - compatible with standard embedded power rails and suitable for harsh-environment deployments. |
| Package Options | 28-pin Thin TSSOP (4.4 × 9.7 mm) or 32-pad QFN (4.0 × 4.0 mm) - compact footprints enable integration into space-constrained industrial and networking equipment. |
Pinout & Package
AT97SC3205T-G3M4610B is offered in two RoHS-compliant packages: 28-pin Thin TSSOP (4.40 mm × 9.70 mm body, 0.65 mm pitch) and 32-pad QFN (4.00 mm × 4.00 mm body, 0.40 mm pitch). Both packages include GND-exposed thermal pad (QFN center pad tied internally to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires local decoupling (2200–4700 pF within 5 mm of each VCC–GND pair + 0.1 µF shared node) |
| GND | System ground reference | Common return path; QFN center pad is internally connected to GND and may be left floating or soldered to PCB ground plane |
| LRESET# | Active-low reset input | Hardware reset pulse ≥2 µs required on power-up until VCC stabilizes; functionally equivalent to power cycle |
| SM_DAT / SM_CLK | I²C bidirectional data / clock | Standard I²C interface supporting 100 kHz / 400 kHz; pull-up values critical at max speed (800 Ω / 1.5 kΩ recommended) |
| PP/GPIO | Physical presence indicator / GPIO | Active-high hardware physical presence signal; internal pull-down; must be left floating if unused |
| TWI_Wakeup# | Low-power sleep recovery trigger | Two-pin active-low wakeup sequence required to exit TPM_DeepSleep mode; pin 7 (TSSOP) / pin 22 (QFN) must both be pulsed |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates AVR CPU, crypto engines, RNG, EEPROM, and I²C interface - eliminates external components and reduces BOM count and board area |
| FIPS-140-2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines - satisfies compliance requirements for government, healthcare, and financial embedded systems |
| Secure hardware layout | Dedicated physical security circuitry and tamper-resistant device layout - protects against side-channel and fault injection attacks |
| Dynamic key cache management | Automatic internal SRAM/EEPROM key caching with no host intervention beyond standard TCG commands - simplifies firmware integration |
| GPIO-Express-00 mapping | Pre-assigned NV index (TPM_NV_INDEX_GPIO_00) with internal pull-up - enables secure, persistent GPIO state storage without custom NV allocation |
Applications
| Server Platform Integrity | Industrial Control Secure Boot |
|---|---|
Use Scenario: Data center servers require hardware-rooted trust to verify firmware authenticity before loading BIOS/UEFI and hypervisor. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4610B acts as the root-of-trust anchor, measuring and sealing boot components into PCR registers and enabling remote attestation. Use Value: Prevents unauthorized firmware modification and ensures only signed, authorized code executes - critical for PCI-DSS and FedRAMP compliance. | Use Scenario: Programmable logic controllers (PLCs) and HMIs in manufacturing plants must resist malicious firmware updates or configuration tampering. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4610B provides secure key storage and signature verification during boot and runtime firmware validation. Use Value: Enables cryptographically enforced firmware update signing and runtime integrity checks - mitigates ransomware and supply-chain compromise risks. |
| Network Appliance Authentication | Medical Device Data Sealing |
Use Scenario: Firewalls, SD-WAN edge routers, and 5G baseband units authenticate peer devices and encrypt control-plane traffic. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4610B generates and stores device identity keys, performs TLS handshake acceleration, and seals network policy parameters. Use Value: Delivers hardware-backed identity binding and key protection - prevents credential theft and man-in-the-middle attacks on encrypted management channels. | Use Scenario: Diagnostic imaging systems and infusion pumps store patient data logs and regulatory audit trails with non-repudiation guarantees. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4610B signs timestamped log entries using stored private keys and seals sensitive configuration data in NV storage. Use Value: Ensures HIPAA-compliant data integrity and tamper-evident logging - satisfies FDA 21 CFR Part 11 electronic record requirements. |
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 | Same TCG TPM 1.2 compliance, 32-pin QFN, 3.3 V, but uses ARM-based core and supports SPI interface in addition to I²C | Broader host interface flexibility; higher power consumption in active mode (15 mA vs. AT97SC3205T-G3M4610B's 10 mA typical) | Select when SPI host interface is required or when migrating from legacy Infineon TPM designs |
| Nuvoton NPCT650KB0DX | TCG TPM 1.2 compliant, 32-pin QFN, 3.3 V, integrates SHA-256 (vs. SHA-1 only in AT97SC3205T-G3M4610B), no AVR core - uses proprietary 8-bit MCU | Stronger hash algorithm support; lacks GPIO-Express-00 NV mapping and physical presence pin (PP/GPIO) functionality | Select when SHA-256 is mandatory or when simplified GPIO requirements allow omission of PP/GPIO signaling |
Compared with SLB9665TT2.0 and NPCT650KB0DX, the AT97SC3205T-G3M4610B offers unique GPIO-Express-00 NV indexing and integrated physical presence detection, making it optimal for systems requiring field-upgradeable secure GPIO state persistence and hardware-level admin approval workflows.
Availability
AT97SC3205T-G3M4610B is available at Aetrix Electronics and suitable for server platform integrity, industrial control secure boot, and network appliance authentication requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AT97SC3205T-G3M4610B 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 single-chip, FIPS-140-2 certified TPM 1.2 modules targeting embedded systems where hardware-rooted trust, secure key storage, and standardized attestation are required - especially in industrial, networking, and medical equipment.
FAQ
What is the primary security function of the AT97SC3205T-G3M4610B?
The AT97SC3205T-G3M4610B serves as a TCG-compliant Trusted Platform Module implementing TPM 1.2 specifications. Its primary security function is to provide hardware-rooted trust through secure key generation, storage, and cryptographic operations - including RSA, AES, SHA-1, and HMAC - all certified under FIPS-140-2. The AT97SC3205T-G3M4610B anchors platform integrity by enabling secure boot, remote attestation, and sealed storage in embedded systems.
Does the AT97SC3205T-G3M4610B support both TSSOP and QFN packages?
Yes, the AT97SC3205T-G3M4610B is manufactured in two package variants: 28-pin Thin TSSOP (4.4 × 9.7 mm, 0.65 mm pitch) and 32-pad QFN (4.0 × 4.0 mm, 0.40 mm pitch). Both are RoHS-compliant and support the same electrical and functional specifications. The "G3M4610B" suffix specifically denotes the 32-pad QFN variant with industrial temperature range (−40°C to +85°C), while the TSSOP version uses different ordering codes.
What interfaces does the AT97SC3205T-G3M4610B support?
The AT97SC3205T-G3M4610B supports only the I²C interface, operating at 100 kHz (Standard Mode) and 400 kHz (Fast Mode). It does not support SPI, UART, or LPC interfaces. Signal integrity at 400 kHz requires specific pull-up resistor values: 800 Ω on SM_DAT and 1.5 kΩ on SM_CLK. The AT97SC3205T-G3M4610B includes dedicated TWI_Wakeup# pins for low-power sleep recovery and PIRQ# for interrupt signaling.
How is nonvolatile storage allocated in the AT97SC3205T-G3M4610B?
The AT97SC3205T-G3M4610B provides 2066 bytes of user-defined NV storage accessible via TCG commands, plus separate internal EEPROM dedicated to RSA key storage. This NV space is organized into indexed regions (e.g., TPM_NV_INDEX_GPIO_00 for GPIO-Express-00) and supports write-protection policies. All NV writes are authenticated and integrity-checked; the AT97SC3205T-G3M4610B enforces access authorization using TPM authorization sessions and locality controls.
Is the AT97SC3205T-G3M4610B suitable for automotive applications?
No, the AT97SC3205T-G3M4610B is not qualified for automotive applications. Per Atmel/Microchip documentation, it is rated for industrial temperature range (−40°C to +85°C) but explicitly excluded from automotive use unless designated as automotive-grade. The AT97SC3205T-G3M4610B lacks AEC-Q100 qualification, automotive-specific failure mode analysis, and extended reliability testing required for vehicle ECUs, infotainment, or ADAS systems.
AT97SC3205T-G3M4610B 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-G3M4610B FAQ
1.How can I place an order for AT97SC3205T-G3M4610B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M4610B 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-G3M4610B reliable?
The price and inventory of AT97SC3205T-G3M4610B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-G3M4610B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M4610B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M4610B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M4610B?
AT97SC3205T-G3M4610B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M4610B 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-G3M4610B?
For technical support, including AT97SC3205T-G3M4610B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M4610B requirements.
6.How does Aetrix verify that AT97SC3205T-G3M4610B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M4610B 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-G3M4610B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M4610B?
All AT97SC3205T-G3M4610B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M4610B, 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-G3M4610B part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M4610B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M4610B Tags
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