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Microchip Technology AT97SC3204T-U2MB-00
- Part No.:
- AT97SC3204T-U2MB-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3204T-U2MB-00.pdf
- Description:
- IC CRYPTO TPM LPC 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
AT97SC3204T-U2MB-00 from Atmel is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications, featuring an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2–compliant RNG, and 1756-byte NV user storage. It interfaces via 33MHz LPC bus with SIRQ and CLKRUN support for power-managed PC platforms.
For engineers reviewing the AT97SC3204T-U2MB-00 datasheet, AT97SC3204T-U2MB-00 pinout, AT97SC3204T-U2MB-00 application, or AT97SC3204T-U2MB-00 equivalent, key selection criteria include LPC interface timing compliance, industrial temperature range (-40°C to +85°C), 40-pin QFN package with GPIO-Express-00, and integrated firmware enabling turnkey TPM deployment without external code development.
Technical Context
The AT97SC3204T-U2MB-00 implements a complete TCG-compliant security stack on a single die: its AVR CPU executes embedded TPM firmware, while dedicated crypto hardware accelerates RSA-2048 signing (200ms) and SHA-1 (20μs/64B block). Internal EEPROM stores RSA keys and 1756 bytes of user-defined NV data.
LPC interface operation follows TIS 1.2 with LAD[3:0], LFRAME#, LCLK, SERIRQ, and CLKRUN# signals; it supports dynamic clock gating via CLKRUN# and interrupt delivery via SERIRQ. Power architecture includes dual 3.3V rails (VCC and SB3V) for active and standby modes, with physical security circuitry protecting against side-channel and fault injection attacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 and PC Client TIS 1.2 specification compliance - enables interoperability with BIOS, OS drivers, and management software across Windows/Linux enterprise environments. |
| RSA Performance | 2048-bit RSA signature in 200ms - meets TCG latency requirements for boot-time attestation and secure key operations without host CPU offload. |
| RNG Certification | FIPS 140-2–compliant hardware RNG - provides cryptographically secure entropy for key generation and protocol nonces without external seeding. |
| LPC Interface | 33MHz, 4-bit LAD[3:0] multiplexed bus with SIRQ and CLKRUN# - integrates directly into standard PC motherboard LPC topology without bridge logic. |
| Nonvolatile Storage | 1756 bytes of user-configurable NV space - supports persistent policy variables, sealed storage blobs, and platform-specific credentials beyond core TPM objects. |
| Operating Range | -40°C to +85°C industrial grade - qualified for use in ruggedized embedded systems, industrial PCs, and edge servers where ambient thermal stability is critical. |
| Supply Voltage | 3.3V ±10% (VCC) and standby 3.3V (SB3V) - enables low-power suspend/resume states while preserving TPM state and cryptographic context. |
Pinout & Package
AT97SC3204T-U2MB-00 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch), per JEDEC MO-220 WJJD-2, with exposed thermal pad. Pin 1 is marked by corner cut and "PIN1 ID" indicator on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply | Power rail for active-mode digital and analog blocks; decoupling required per layout guidelines. |
| SB3V | Standby 3.3V supply | Maintains RTC, NV memory, and wake logic during system suspend; independent from VCC. |
| LAD0–LAD3 | LPC bidirectional data/address/command lines | Time-multiplexed 4-bit bus carrying all TIS transactions; requires pull-up resistors and controlled impedance routing. |
| LCLK | 33MHz LPC clock input | Synchronous reference for all LPC transfers; must be clean, low-jitter clock sourced from southbridge or PCH. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction cycle; used for timing alignment and error detection. |
| SERIRQ | Serialized interrupt request | Open-drain shared interrupt line supporting IRQ steering; requires external pull-up and arbitration logic. |
| CLKRUN# | PCI clock run control | Enables dynamic clock gating for power savings; asserted by host to stop LCLK during idle periods. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per firmware mapping; usable for platform-specific signaling or status indication. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware crypto accelerator | Dedicated RSA and SHA-1 engines eliminate host CPU overhead for attestation, sealing, and key wrapping - critical for real-time boot integrity verification. |
| Integrated AVR RISC processor | On-chip 8-bit CPU executes certified TPM firmware stack; no external microcontroller or flash required - reduces BOM count and attack surface. |
| FIPS 140-2 RNG | Entropy source validated to NIST standards ensures cryptographic key material is unpredictable and resistant to deterministic reconstruction. |
| Turnkey firmware | Factory-programmed, TCG-certified firmware eliminates need for OEM driver development or firmware validation - accelerates time-to-certification. |
| LPC interface compliance | Native support for TIS 1.2 timing, retry, and error-handling protocols ensures plug-and-play integration with Intel PCH and AMD FCH chipsets. |
Applications
| Secure Boot Platform | Enterprise Laptop Security |
|---|---|
|
Use Scenario: Motherboard firmware measures boot components into PCR registers before execution, using TPM-protected keys to verify authenticity. IC Role / Device Role / Timing Role: Root-of-trust anchor performing hash extension, signature verification, and sealed storage of PCR values during POST. Use Value: Prevents unauthorized firmware modification by binding measurements to hardware-bound keys stored in internal EEPROM - tamper-evident and replay-resistant. |
Use Scenario: Windows BitLocker encrypts drive volumes using keys sealed to TPM state, unlocking only when boot path remains unaltered. IC Role / Device Role / Timing Role: Cryptographic co-processor generating and protecting volume encryption keys; responds to OS requests over LPC within TIS-specified timing windows. Use Value: Enables transparent full-disk encryption without user password entry at boot - dependent on 2048-bit RSA signing and FIPS RNG for key derivation. |
| Industrial Control System | Medical Device Authentication |
|
Use Scenario: PLC or HMI verifies firmware signature and authenticates firmware updates before installation, rejecting unsigned payloads. IC Role / Device Role / Timing Role: Secure update validator executing TCG-approved algorithms; uses NV storage to persist update counters and revocation lists. Use Value: Mitigates supply-chain compromise by enforcing cryptographic chain-of-trust for field upgrades - enabled by 1756-byte NV space and industrial temp rating. |
Use Scenario: Diagnostic imaging equipment binds device identity to manufacturer-issued certificates, preventing unauthorized service access or calibration tampering. IC Role / Device Role / Timing Role: Identity anchor storing asymmetric key pairs and attesting platform configuration to remote service portals via TPM Quote command. Use Value: Meets FDA cybersecurity guidance by providing hardware-enforced device identity and audit-ready attestation logs - reliant on physical security circuitry and EEPROM key isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9670 | Supports TPM 2.0 and LPC/serial interfaces; higher RSA-3072 performance; no AVR core - uses proprietary secure processor. | Required for Windows 11 compliance and new OEM designs targeting post-2020 TCG standards. | Select SLB9670 when upgrading to TPM 2.0 mandates or requiring extended algorithm support (ECC, SM2); not drop-in compatible due to firmware and register map differences. |
| Nuvoton NPCT650 | TPM 1.2 compliant; 33MHz LPC; integrated RNG and 2KB NV storage; uses ARM-based secure core instead of AVR. | Common in cost-sensitive consumer notebooks; lower power consumption but less robust physical security hardening than AT97SC3204T-U2MB-00. | Choose NPCT650 for high-volume commercial laptops where BOM cost is prioritized over industrial-grade reliability and FIPS RNG certification. |
Compared with SLB9670 and NPCT650, AT97SC3204T-U2MB-00 offers verified FIPS 140-2 RNG, AVR-based firmware transparency, and industrial temperature qualification - making it optimal for legacy-critical infrastructure and medical/industrial systems requiring long-term TPM 1.2 support with documented physical security.
Availability
AT97SC3204T-U2MB-00 is available at Aetrix Electronics and suitable for secure boot platforms, enterprise laptop security, and industrial control systems requiring stable component supply, long lifecycle assurance, and TCG-compliant hardware root-of-trust functionality.
Supply support for AT97SC3204T-U2MB-00 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 innovator specializing in microcontrollers, security ICs, and touch solutions for embedded systems.
The AT97SC3204 product line delivers certified TPM 1.2 modules designed for PC client and industrial embedded platforms requiring hardware-enforced trust, cryptographic acceleration, and seamless LPC integration without external firmware development.
FAQ
What is the primary function of the AT97SC3204T-U2MB-00 in a computing system?
The AT97SC3204T-U2MB-00 serves as a hardware root-of-trust implementing the Trusted Platform Module (TPM) 1.2 specification. It performs cryptographic operations including RSA signing, SHA-1 hashing, and secure random number generation, and stores keys and platform measurements in protected internal EEPROM. Its role is to enable secure boot, disk encryption, and remote attestation by anchoring trust in silicon - a function central to the AT97SC3204T-U2MB-00's design and deployment.
Does the AT97SC3204T-U2MB-00 support TPM 2.0?
No, the AT97SC3204T-U2MB-00 is strictly compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications. It does not implement TPM 2.0 algorithms, structures, or command sets. For TPM 2.0 compliance, alternative devices such as the Infineon SLB9670 must be selected. The AT97SC3204T-U2MB-00 firmware and hardware architecture are fixed to TPM 1.2 functionality as verified in its official summary datasheet.
What package type is used for the AT97SC3204T-U2MB-00?
The AT97SC3204T-U2MB-00 uses a 40-pad Very-thin Quad Flat No Lead (VQFN) package, designated 40ML1, with 6.0 mm × 6.0 mm body size and 0.50 mm pitch. This package is distinct from the 28-pin thin TSSOP option and features an exposed thermal pad for enhanced thermal dissipation in sustained cryptographic workloads - a confirmed mechanical specification for the AT97SC3204T-U2MB-00 variant.
How does the AT97SC3204T-U2MB-00 handle power management in mobile systems?
The AT97SC3204T-U2MB-00 supports dynamic power management via dedicated SB3V standby rail and CLKRUN# signal. When the host asserts CLKRUN#, the device stops LCLK internally while retaining state in SRAM and EEPROM, reducing active power draw. SB3V maintains critical logic during suspend, enabling fast resume without reinitialization - a capability explicitly defined for the AT97SC3204T-U2MB-00 in its LPC interface summary datasheet.
Is the AT97SC3204T-U2MB-00 qualified for industrial temperature operation?
Yes, the AT97SC3204T-U2MB-00 is rated for industrial temperature range (-40°C to +85°C), as confirmed in the ordering information section of its summary datasheet. This qualification applies specifically to variants ordered with industrial-grade screening, including the AT97SC3204T-U2MB-00, making it suitable for deployment in factory automation, transportation, and medical equipment where thermal resilience is mandatory.
AT97SC3204T-U2MB-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Cut Tape (CT)
- 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:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
AT97SC3204T-U2MB-00 FAQ
1.How can I place an order for AT97SC3204T-U2MB-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U2MB-00 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 AT97SC3204T-U2MB-00 reliable?
The price and inventory of AT97SC3204T-U2MB-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-U2MB-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U2MB-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U2MB-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U2MB-00?
AT97SC3204T-U2MB-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U2MB-00 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 AT97SC3204T-U2MB-00?
For technical support, including AT97SC3204T-U2MB-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U2MB-00 requirements.
6.How does Aetrix verify that AT97SC3204T-U2MB-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U2MB-00 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 AT97SC3204T-U2MB-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U2MB-00?
All AT97SC3204T-U2MB-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U2MB-00, 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 AT97SC3204T-U2MB-00 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U2MB-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-U2MB-00 Tags
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CYPD3175-24LQXQ
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SLB9672VU20FW1523XTMA1
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SLB9670VQ20FW785XTMA1
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AT97SC3204-U2A1A-20
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SLM9670AQ20FW1311XTMA1
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SLB9672XU20FW1613XTMA1
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SLB9673AU20FW2613XTMA1
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