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Microchip Technology AT97SC3205T-G3M4C-10
- Part No.:
- AT97SC3205T-G3M4C-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M4C-10.pdf
- Description:
- FF COM I2C TPM 4X4 32VQFN UEK
- Quantity:
- Payment:
- Shipping:
Inventory:865
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Product details
Overview
AT97SC3205T-G3M4C-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 systems.
For engineers reviewing the AT97SC3205T-G3M4C-10 datasheet, AT97SC3205T-G3M4C-10 pinout, AT97SC3205T-G3M4C-10 application, or AT97SC3205T-G3M4C-10 equivalent, this page delivers verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for secure system integration.
Technical Context
The AT97SC3205T-G3M4C-10 implements the full TCG TPM 1.2 specification using an on-die AVR 8-bit RISC CPU, dedicated cryptographic hardware acceleration for RSA, SHA-1, HMAC, and AES, and a FIPS-140-2 certified hardware random number generator. Its internal EEPROM stores RSA keys and supports dynamic key cache management without host intervention.
It communicates exclusively via I²C (SM_DAT/SM_CLK), supports low-power deep-sleep recovery via TWI_Wakeup# pins, and provides GPIO-Express-00, PP/GPIO, and XTAMPER-capable TestBI/GPIO/XTAMPER terminals for platform-specific security signaling and tamper detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification fully implemented - enables standardized secure boot, attestation, and sealed storage across OS and firmware layers. |
| I²C Interface Speed | 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 pin and 0.1 μF cap <10 mm at VCC node junction. |
| NV User Storage | 2066 bytes - allocated for customer-defined persistent data such as configuration tokens, certificates, or policy counters. |
| Crypto Certification | FIPS-140-2 Level 2 certified RNG, HMAC, AES, SHA, RSA - satisfies regulatory requirements for cryptographic module validation in government and enterprise deployments. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including network infrastructure, industrial controllers, and edge gateways. |
| Package Options | 28-pin Thin TSSOP (4.4 × 9.7 mm, 0.65 mm pitch) or 32-pad QFN (4.0 × 4.0 mm, 0.40 mm pitch) - both RoHS-compliant and lead-free. |
Pinout & Package
AT97SC3205T-G3M4C-10 is offered in two RoHS-compliant packages: 28-pin Thin TSSOP (4.4 mm × 9.7 mm body, 0.65 mm pitch) and 32-pad QFN (4.0 mm × 4.0 mm body, 0.40 mm pitch). The QFN variant includes an exposed GND pad internally tied to substrate ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V primary supply requiring localized decoupling (2200–4700 pF <5 mm to adjacent GND); multiple VCC pins support noise resilience. |
| LRESET# | Active-low reset input | Minimum 2 μs pulse required; must remain asserted until VCC stabilizes at power-up - critical for deterministic TPM initialization. |
| SM_DAT / SM_CLK | I²C bidirectional data/clock | Interface operates at up to 400 kHz; pull-up values (800 Ω / 1.5 kΩ) directly impact signal integrity and timing margin at max speed. |
| PP/GPIO | Hardware physical presence indicator | Active-high signal used to assert physical access authorization; internal pull-down ensures safe default state when floating. |
| GPIO-Express-00 | Pre-mapped NV-indexed GPIO | Assigned to TPM_NV_INDEX_GPIO_00 with internal pull-up; serves as XOR chain output during I/O test mode - no external bias needed if unused. |
| TWI_Wakeup# (pins 7 & 22) | Low-power sleep recovery trigger | Both pins must be pulsed low simultaneously to exit deep-sleep mode - enables ultra-low quiescent current between TPM operations. |
| TestBI/GPIO/XTAMPER | Multi-function terminal | Configurable as GPIO, external tamper input (XTAMPER), or test interface; tied to GND via 4.7 kΩ if unused to prevent floating noise susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates CPU, crypto engines, RNG, EEPROM, and I²C interface in one die - eliminates multi-chip layout complexity and interconnect vulnerabilities. |
| FIPS-140-2 Level 2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines - satisfies compliance requirements for U.S. federal, defense, and financial sector deployments without additional validation effort. |
| Hardware asymmetric crypto engine | Accelerates RSA key generation and signing operations offloading host CPU - reduces latency for secure boot verification and remote attestation. |
| Internal EEPROM for RSA keys | Securely stores multiple private keys with hardware-enforced access control - prevents extraction even under physical probing or fault injection attacks. |
| Dynamic key cache management | Automatically handles TPM_FlushSpecific and TPM_LoadKey2 operations - eliminates need for host firmware to manage key residency state. |
Applications
| Secure Boot Authentication | Platform Integrity Attestation |
|---|---|
Use Scenario: Verifying firmware signature and measurement chain before loading bootloader or OS kernel in industrial gateways. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor, performing SHA-1 hashing and RSA signature verification of PCR values and boot components. Use Value: Prevents unauthorized firmware execution by binding boot sequence to cryptographically signed measurements stored in protected PCRs. | Use Scenario: Reporting system health and configuration state to cloud management servers for endpoint compliance enforcement. IC Role / Device Role / Timing Role: TPM generates quote structures containing PCR digests and signs them with endorsement key - delivered over I²C to host MCU for network transmission. Use Value: Enables zero-touch provisioning and automated policy enforcement by proving unaltered runtime state without exposing sensitive keys. |
| Sealed Storage Encryption Keys | Hardware Physical Presence Control |
Use Scenario: Storing disk encryption keys (e.g., BitLocker, LUKS) that unlock only when platform configuration matches pre-recorded PCR values. IC Role / Device Role / Timing Role: TPM binds keys to specific PCR states and releases them only upon successful quote validation - keys never leave secure boundary. Use Value: Ensures data remains inaccessible after unauthorized BIOS/firmware modification or unauthorized OS installation. | Use Scenario: Requiring physical button press or jumper setting before enabling privileged operations like firmware update or credential reset. IC Role / Device Role / Timing Role: PP/GPIO pin detects hardware-level presence assertion; TPM enforces policy requiring active-high signal before processing sensitive commands. Use Value: Mitigates remote exploitation by enforcing out-of-band human authorization for high-risk administrative actions. |
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 |
|---|---|---|---|
| ST33TPHF2Xx (STMicroelectronics) | TPM 1.2 compliant; uses ARM-based secure core instead of AVR; supports same I²C speeds and 3.3 V supply; offers 2 kB NV storage. | ARM architecture enables richer firmware extensibility; different command set extensions and interrupt handling (INT# vs PIRQ#). | Select when requiring ARM ecosystem tooling, extended command support, or tighter integration with ST's secure element portfolio. |
| SLB9670 (Infineon) | TPM 1.2 compliant; integrated Infineon Security Controller; supports identical I²C interface and 3.3 V operation; certified to Common Criteria EAL4+. | Offers broader tamper resistance features (voltage, frequency, temperature sensors); different GPIO mapping and wake-up signaling behavior. | Select when advanced physical attack mitigation, CC EAL4+ certification, or Infineon's Trusted Computing software stack is required. |
Compared with ST33TPHF2Xx and SLB9670, the AT97SC3205T-G3M4C-10 delivers proven AVR-based deterministic execution, minimal I²C timing overhead, and streamlined GPIO-Express-00 integration for rapid TPM enablement in resource-constrained industrial hosts - ideal where simplicity, legacy compatibility, and fast time-to-secure-boot are prioritized.
Availability
AT97SC3205T-G3M4C-10 is available at Aetrix Electronics and suitable for industrial gateways, network appliances, medical edge devices, and embedded controllers requiring stable component supply with long-term lifecycle assurance.
Supply support for AT97SC3205T-G3M4C-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 product support, documentation, and manufacturing continuity for the AT97SC3205T-G3M4C-10 family.
This device belongs to Atmel's Trusted Platform Module product line, designed specifically to embed hardware-rooted trust into cost-sensitive, space-constrained embedded platforms without external crypto co-processors or complex software stacks.
FAQ
What is the primary interface protocol supported by the AT97SC3205T-G3M4C-10?
The AT97SC3205T-G3M4C-10 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, UART, or LPC interfaces. Pull-up resistor values (800 Ω on SM_DAT, 1.5 kΩ on SM_CLK) are critical for reliable 400 kHz operation, and duty cycle stability on SM_CLK improves communication robustness.
Does the AT97SC3205T-G3M4C-10 include certified cryptographic modules?
Yes, the AT97SC3205T-G3M4C-10 integrates a FIPS-140-2 Level 2 certified cryptographic module covering the hardware random number generator (RNG), HMAC, AES, SHA-1, and RSA engines. This certification applies to the complete on-die implementation and is documented in the official FIPS validation report referenced in Atmel's compliance documentation.
How is non-volatile user data storage implemented in the AT97SC3205T-G3M4C-10?
The AT97SC3205T-G3M4C-10 provides 2066 bytes of NV user storage accessible via TCG-defined NV write/read commands. This space resides in internal EEPROM and is logically partitioned into indices managed by the TPM firmware - no host-side flash abstraction layer is required, and writes are atomic and wear-leveled within the module.
What is the function of the PP/GPIO pin on the AT97SC3205T-G3M4C-10?
The PP/GPIO pin on the AT97SC3205T-G3M4C-10 serves dual roles: as a hardware physical presence indicator (active-high) for enforcing out-of-band authorization, and as a general-purpose input/output. Its internal pull-down resistor ensures safe default logic-low state when left floating, and it maps directly to TCG-defined physical presence assertions in the TPM command set.
Can the AT97SC3205T-G3M4C-10 enter low-power sleep mode, and how is it exited?
Yes, the AT97SC3205T-G3M4C-10 supports low-power deep-sleep mode triggered by the TPM_DeepSleep command. Recovery requires simultaneous active-low pulses on both TWI_Wakeup# pins (TSSOP pin 7 and pin 22; QFN pin 7 and pin 22). This dual-pin requirement prevents accidental wake-up and ensures intentional platform-level control over power state transitions.
AT97SC3205T-G3M4C-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-G3M4C-10 FAQ
1.How can I place an order for AT97SC3205T-G3M4C-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M4C-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-G3M4C-10 reliable?
The price and inventory of AT97SC3205T-G3M4C-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-G3M4C-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M4C-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M4C-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M4C-10?
AT97SC3205T-G3M4C-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M4C-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-G3M4C-10?
For technical support, including AT97SC3205T-G3M4C-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M4C-10 requirements.
6.How does Aetrix verify that AT97SC3205T-G3M4C-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M4C-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-G3M4C-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M4C-10?
All AT97SC3205T-G3M4C-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M4C-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-G3M4C-10 part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M4C-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M4C-10 Tags
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CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
-
SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
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AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
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SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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