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Microchip Technology AT97SC3205T-X3A1410B
- Part No.:
- AT97SC3205T-X3A1410B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3205T-X3A1410B.pdf
- Description:
- MEM FF IND I2C TPM 28TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3205T-X3A1410B from Microchip (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, HMAC/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 authentication, and key management in embedded computing systems.
For engineers reviewing the AT97SC3205T-X3A1410B datasheet, AT97SC3205T-X3A1410B pinout, AT97SC3205T-X3A1410B application, or AT97SC3205T-X3A1410B equivalent, this page delivers verified electrical specs, validated I²C timing constraints, confirmed GPIO-Express-00 and PP/GPIO roles, exact TSSOP/QFN package mapping, and FIPS-140-2 module certification scope for secure system integration.
Technical Context
The AT97SC3205T-X3A1410B 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 I²C transactions and internal RSA key operations.
It supports dual-package options - 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 rated for industrial temperature range (−40°C to +85°C). The device enters low-power sleep on idle and recovers via TWI_Wakeup# pulse sequence.
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. |
| 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. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES, SHA-1, and RSA; hardware-accelerated signing/decryption offloads host CPU. |
| Non-Volatile Storage | 2066 bytes user-defined NV space + dedicated EEPROM for RSA keys; managed internally without host intervention. |
| Supply Voltage | 3.3 V ±10%; requires localized decoupling: 2200–4700 pF caps <5 mm from each VCC–GND pair plus 0.1 µF at VCC node <10 mm. |
| Operating Temperature | −40°C to +85°C industrial grade; validated across full range for reliability in embedded control and server platforms. |
Pinout & Package
AT97SC3205T-X3A1410B is offered in two RoHS-compliant packages: 28-pin Thin TSSOP (4.40 × 9.70 mm body, 0.65 mm pitch) and 32-pad QFN (4.00 × 4.00 mm body, 0.40 mm pitch). Both packages support industrial temperature operation and share identical pin functionality except for NC pin count and layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply Input | 3.3 V main supply; requires tight decoupling per spec to prevent noise-induced TPM faults during crypto operations. |
| GND | System Ground Reference | Reference for all digital and analog blocks; substrate pad in QFN is internally tied to GND. |
| SM_DAT / SM_CLK | I²C Data/Clock | Open-drain bidirectional interface; supports 400 kHz with specified pull-up values; duty cycle near 50% improves stability. |
| LRESET# | Active-Low Reset | Asynchronous reset; minimum 2 µs pulse width required; must remain asserted until VCC stabilizes at power-up. |
| PP/GPIO | Physical Presence Indicator | Hardware-enforced physical presence signal (active-high); used for privileged TPM commands like Clear or Owner establishment. |
| GPIO-Express-00 | Pre-mapped NV GPIO | Fixed NV index TPM_NV_INDEX_GPIO_00; internal pull-up; floats when unused; used for persistent state signaling. |
| TWI_Wakeup# | Low-Power Recovery | Two-pin wake sequence (pins 7 & 22 in TSSOP) required to exit deep sleep after TPM_DeepSleep command. |
| PIRQ# | Interrupt Request Output | Active-low interrupt to host upon completion of long-running TPM commands (e.g., RSA key generation). |
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 components and reduces BOM cost. |
| FIPS-140-2 Level 2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines; validates cryptographic integrity and physical tamper resistance for regulated deployments. |
| Hardware asymmetric crypto engine | Offloads RSA key generation, signing, and decryption from host processor-reduces latency and prevents software-side side-channel exposure. |
| Internal EEPROM for RSA keys | Securely stores multiple private keys with hardware-enforced access control-no host RAM exposure or software key management required. |
| 2066-byte user NV storage | Dedicated, authenticated space for firmware version stamps, configuration flags, or audit logs-accessible only via authorized TPM commands. |
Applications
| Server Platform Authentication | Industrial Control Secure Boot |
|---|---|
Use Scenario: Verifying firmware integrity and hardware identity before OS load in rack-mounted servers. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust; measures BIOS, bootloader, and kernel into Platform Configuration Registers (PCRs) and signs attestations. Use Value: Enables remote attestation of unmodified firmware stack using RSA signatures generated by AT97SC3205T-X3A1410B's hardware crypto engine. | Use Scenario: Preventing unauthorized firmware updates in programmable logic controllers (PLCs) and HMIs. IC Role / Device Role / Timing Role: Secure boot anchor; verifies digital signature of firmware image using embedded RSA public key before execution. Use Value: Guarantees only cryptographically signed firmware runs-blocks malicious payloads even if flash memory is physically reprogrammed. |
| Embedded Device Identity Provisioning | Medical Equipment Data Integrity |
Use Scenario: Embedding unique, factory-provisioned device identity into networked IoT gateways during manufacturing. IC Role / Device Role / Timing Role: Identity vault; stores device-specific ECC/RSA key pairs in protected EEPROM and binds them to hardware via TPM quote commands. Use Value: Provides cryptographically verifiable device identity for TLS client authentication-prevents cloning and MITM attacks. | Use Scenario: Ensuring audit log immutability and software update authenticity in FDA-regulated diagnostic imaging systems. IC Role / Device Role / Timing Role: Tamper-evident log keeper; signs timestamped event records (e.g., calibration, service) using hardware RNG and RSA engine. Use Value: Meets 21 CFR Part 11 requirements for electronic records by providing non-repudiable, time-stamped digital signatures stored in AT97SC3205T-X3A1410B NV memory. |
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 | ARM-based secure MCU; supports TPM 2.0 and 1.2; higher clock speed (48 MHz vs. AVR ~12 MHz); includes additional crypto accelerators (ECC, SHA-256). | Supports newer TPM 2.0 features (hierarchical key trees, policy-based authorization); lacks GPIO-Express-00 mapping but offers more flexible GPIO routing. | Select ST33TPHF2XZ when upgrading to TPM 2.0 compliance or requiring SHA-256/ECC acceleration; verify host driver compatibility. |
| Infineon SLB9670 | Dedicated TPM 1.2 ASIC; no general-purpose CPU; lower power consumption; certified to Common Criteria EAL4+ (vs. FIPS-140-2 Level 2 for AT97SC3205T-X3A1410B). | Better suited for ultra-low-power always-on use cases; no user-programmable firmware or GPIO-Express-00 NV index; fixed feature set. | Select SLB9670 for cost-sensitive, high-volume deployments where firmware extensibility is unnecessary and CC EAL4+ is mandated. |
Compared with ST33TPHF2XZ and SLB9670, the AT97SC3205T-X3A1410B uniquely combines AVR programmability, GPIO-Express-00 NV indexing, and FIPS-140-2 certified crypto engines in a dual-package form factor-making it optimal for legacy TPM 1.2 designs requiring field-upgradable firmware and hardware-bound state persistence.
Availability
AT97SC3205T-X3A1410B is available at Aetrix Electronics and suitable for server platform authentication, industrial control secure boot, and medical equipment data integrity requiring stable component supply across extended product lifecycles.
Supply support for AT97SC3205T-X3A1410B 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 ICs. The company specializes in microcontrollers, analog, and security solutions for industrial, automotive, and communications markets.
The AT97SC3205T-X3A1410B belongs to Atmel's TPM family designed specifically for embedded systems requiring hardware-rooted trust, cryptographic acceleration, and TCG-standardized attestation-targeting infrastructure, medical, and industrial applications where firmware integrity and device identity are mission-critical.
FAQ
What is the primary interface protocol supported by the AT97SC3205T-X3A1410B?
The AT97SC3205T-X3A1410B uses an I²C interface compliant with TCG TPM 1.2 specifications, supporting both Standard Mode (100 kHz) and Fast Mode (400 kHz). Pull-up resistor values of 800 Ω on SM_DAT and 1.5 kΩ on SM_CLK are validated for reliable 400 kHz operation. The AT97SC3205T-X3A1410B does not support SPI or UART interfaces.
Does the AT97SC3205T-X3A1410B support TPM 2.0?
No, the AT97SC3205T-X3A1410B implements only the TCG TPM 1.2 specification. It lacks the hierarchical key structure, algorithm agility, and command set required for TPM 2.0 compliance. For TPM 2.0 functionality, consider alternatives such as the ST33TPHF2XZ or Infineon SLB9670 v2.0 variants.
How is the GPIO-Express-00 pin used in the AT97SC3205T-X3A1410B?
The GPIO-Express-00 pin on the AT97SC3205T-X3A1410B maps directly to NV index TPM_NV_INDEX_GPIO_00 and provides persistent, TPM-managed state storage. It features an internal pull-up resistor and defaults to input mode. When configured, it allows firmware to store and retrieve boolean or enumerated states across reboots without host CPU involvement.
What certifications apply to the AT97SC3205T-X3A1410B's cryptographic modules?
The AT97SC3205T-X3A1410B's RNG, HMAC, AES, SHA, and RSA engines are certified under FIPS-140-2 Level 2. This validation covers both algorithm correctness and physical security mechanisms such as tamper detection and side-channel resistance. Certification documentation is available under NDA from Microchip.
Can the AT97SC3205T-X3A1410B operate in low-power modes, and how is wake-up handled?
Yes, the AT97SC3205T-X3A1410B automatically enters low-power sleep when idle. Recovery requires pulsing two dedicated pins-TWI_Wakeup# (pin 7 in TSSOP, pin 22 in QFN)-active-low in sequence. This dual-pin mechanism prevents spurious wake-ups and ensures deterministic resume from deep sleep after issuing the TPM_DeepSleep command.
AT97SC3205T-X3A1410B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 28-TSSOP
AT97SC3205T-X3A1410B FAQ
1.How can I place an order for AT97SC3205T-X3A1410B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-X3A1410B 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-X3A1410B reliable?
The price and inventory of AT97SC3205T-X3A1410B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-X3A1410B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-X3A1410B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-X3A1410B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-X3A1410B?
AT97SC3205T-X3A1410B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-X3A1410B 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-X3A1410B?
For technical support, including AT97SC3205T-X3A1410B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-X3A1410B requirements.
6.How does Aetrix verify that AT97SC3205T-X3A1410B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-X3A1410B 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-X3A1410B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-X3A1410B?
All AT97SC3205T-X3A1410B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-X3A1410B, 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-X3A1410B part is unused and in its original packaging.
Return procedure for AT97SC3205T-X3A1410B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-X3A1410B Tags
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