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Microchip Technology AT97SC3204T-U2MB-10
- Part No.:
- AT97SC3204T-U2MB-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3204T-U2MB-10.pdf
- Description:
- IC CRYPTO TPM LPC 40QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3204T-U2MB-10 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 33MHz LPC interface for secure PC platform integration.
For engineers reviewing the AT97SC3204T-U2MB-10 datasheet, AT97SC3204T-U2MB-10 pinout, AT97SC3204T-U2MB-10 application, or AT97SC3204T-U2MB-10 equivalent, key selection considerations include LPC bus timing compliance, industrial temperature range (-40°C to +85°C), 40-pin QFN package, NV storage capacity (1756 bytes), and secure key management architecture.
Technical Context
The AT97SC3204T-U2MB-10 implements a complete TCG-compliant TPM stack in silicon, integrating an 8-bit AVR CPU, dedicated cryptographic accelerator for RSA and SHA-1 (20μs/64-byte block), and internal EEPROM for persistent RSA key storage. It uses dynamic memory management for key caching without host intervention.
Communication occurs exclusively via the 33MHz Low Pin Count (LPC) bus with SIRQ and CLKRUN# support for power-aware interrupt handling and clock gating in mobile systems. Physical security circuitry and tamper-resistant layout enforce hardware-level protection against side-channel and fault injection attacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client TIS 1.2 - enables interoperable trusted boot and attestation in Windows/Linux BIOS environments. |
| Crypto Engine | Hardware RSA accelerator: 2048-bit signature in ≤200ms, 1024-bit in ≤40ms - offloads asymmetric computation from host CPU. |
| RNG | FIPS 140-2-certified hardware random number generator - provides cryptographically secure entropy for key generation and protocol nonces. |
| LPC Interface | 33MHz synchronous LPC bus with LAD[0:3], LFRAME#, LCLK, SERIRQ, CLKRUN# - matches Intel/AMD chipset LPC timing requirements. |
| Nonvolatile Storage | 1756 bytes of user-defined NV space in on-chip EEPROM - supports custom policy objects, credentials, and sealed data without external flash. |
| Supply & Temp | 3.3V single supply; operates from -40°C to +85°C - qualified for industrial embedded and server motherboard deployment. |
| Package | 40-pad QFN (6.0 × 6.0 × 0.9 mm, 0.50 mm pitch) - surface-mount compatible with automated PCB assembly and thermal pad grounding. |
Pinout & Package
AT97SC3204T-U2MB-10 is packaged in a 40-pad Very-thin Quad Flat No Lead (VQFN) with exposed thermal pad, 6.0 mm × 6.0 mm body, and 0.50 mm pitch. Pinout conforms to TCG-specified LPC interface mapping with dedicated GPIO and test pins disabled in production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary Power Supply | 3.3V main supply input; decoupling required per TCG LPC design guidelines. |
| SB3V | Standby Power Rail | 3.3V standby supply for maintaining TPM state during S3/S4 sleep states. |
| GND | Ground Reference | Multiple GND pins provide low-impedance return paths for digital and analog sections. |
| LAD0–LAD3 | LPC Data/Address Bus | 4-bit multiplexed command/address/data lines; bidirectional, open-drain with pull-ups per LPC spec. |
| LCLK | LPC Clock Input | 33MHz system clock input; must be synchronized to host chipset LPC clock domain. |
| LFRAME# | LPC Frame Strobe | Active-low signal indicating start/end of LPC transaction cycle; defines timing window for LAD sampling. |
| SERIRQ | Serialized Interrupt | Shared interrupt line using serialized IRQ protocol; requires host-side SERIRQ controller. |
| CLKRUN# | PCI Clock Run Control | Open-drain output enabling host to gate LPC clock during idle periods for power savings. |
| LPCPD# | LPC Power-Down | Input signaling host-initiated low-power mode; triggers internal state retention sequence. |
| GPIO-Express-00 | Configurable General-Purpose I/O | Single-purpose GPIO mapped to TPM_NV_INDEX_GPIO_00; usable for platform-specific signaling or status indication. |
Key Features
| Feature | Design Value |
|---|---|
| Turnkey TPM Firmware | Firmware pre-integrated and validated per TCG 1.2 specification - eliminates host-side TPM stack development and certification effort. |
| Hardware Key Isolation | Internal EEPROM stores RSA keys with physical read-protection - prevents extraction even under full chip access or probing. |
| Dynamic Key Cache | Automatic SRAM-based key caching with TPM_FlushSpecific/TPM_LoadKey2 support - reduces EEPROM wear and improves session performance. |
| Power-Aware Interface | LPC interface supports CLKRUN# and SIRQ - enables seamless integration into ACPI-compliant power management frameworks (S0ix/S3). |
| Secure Boot Foundation | Meets TCG PC Client requirements for measured boot chain - provides PCR extension, quote, and sealing primitives for UEFI Secure Boot validation. |
Applications
| Server Motherboard Security | Industrial Embedded Control |
|---|---|
Use Scenario: Secure firmware update and remote attestation in rack-mounted servers with IPMI and BMC integration. IC Role / Device Role / Timing Role: Root-of-trust anchor providing cryptographic signing, sealed storage, and PCR-based integrity measurement of BIOS/firmware images. Use Value: Enables verified boot and runtime integrity monitoring without host CPU involvement, reducing attack surface and ensuring supply-chain authenticity. | Use Scenario: Tamper-evident configuration locking and encrypted parameter storage in programmable logic controllers (PLCs) operating in harsh environments. IC Role / Device Role / Timing Role: Secure key vault and hardware-enforced credential manager interfacing via LPC to ARM-based control SoC. Use Value: Maintains operational integrity across -40°C to +85°C temperature cycles while preventing unauthorized firmware reprogramming or parameter modification. |
| Medical Imaging Workstation | Network Appliance Authentication |
Use Scenario: HIPAA-compliant audit logging and device identity binding in DICOM-enabled imaging systems requiring FDA 510(k) certification. IC Role / Device Role / Timing Role: Hardware-backed identity provider generating unique EK and AIK certificates tied to system serial and manufacturer root keys. Use Value: Meets regulatory requirements for non-repudiation and cryptographic separation between diagnostic software and hardware platform identity. | Use Scenario: Secure boot and TLS certificate provisioning in enterprise firewalls and SD-WAN edge devices with zero-touch provisioning. IC Role / Device Role / Timing Role: Trust anchor for PKI enrollment, certificate lifecycle management, and hardware-bound private key storage for TLS handshake acceleration. Use Value: Eliminates reliance on software-only key storage, preventing credential theft during OS compromise or firmware rollback attacks. |
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 SLB9665TT2.0 | Supports TPM 2.0 specification; includes ECC acceleration and larger NV space (2048+ bytes); requires SPI or I²C interface instead of LPC. | Designed for modern UEFI platforms requiring TPM 2.0 features like algorithm agility and hierarchical key trees; not drop-in LPC replacement. | Select when upgrading to TPM 2.0 compliance is required and host interface can be redesigned for SPI/I²C. |
| Nuvoton NPCT650KB0DX | TPM 2.0 compliant; integrates ARM Cortex-M0+ core; supports both LPC and SPI interfaces; offers extended temperature grade (-40°C to +105°C). | Targets high-reliability industrial and automotive telematics where extended temp and dual-interface flexibility are critical. | Choose for new designs needing TPM 2.0 with backward-compatible LPC option and broader thermal margin than AT97SC3204T-U2MB-10. |
Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT650KB0DX, the AT97SC3204T-U2MB-10 delivers proven TCG 1.2 interoperability with legacy BIOS and LPC-centric motherboards, lower integration risk in existing industrial platforms, and deterministic 33MHz timing behavior - making it optimal for cost-sensitive, long-lifecycle deployments where TPM 2.0 migration is not mandated.
Availability
AT97SC3204T-U2MB-10 is available at Aetrix Electronics and suitable for server motherboard security, industrial embedded control, medical imaging workstations, and network appliance authentication requiring stable component supply and long-term industrial temperature qualification.
Supply support for AT97SC3204T-U2MB-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
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, turnkey TPM modules targeting PC client and industrial platforms requiring hardware-rooted trust, with design focus on LPC integration, FIPS-compliant entropy, and field-proven firmware stack reliability.
FAQ
What is the primary interface standard supported by the AT97SC3204T-U2MB-10?
The AT97SC3204T-U2MB-10 supports the Low Pin Count (LPC) bus interface at 33MHz, fully compliant with TCG PC Client Specific TPM Interface Specification (TIS) version 1.2. It uses LAD[0:3], LFRAME#, LCLK, SERIRQ, and CLKRUN# signals for communication with host chipsets, and does not support SPI, I²C, or UART interfaces.
Does the AT97SC3204T-U2MB-10 meet FIPS 140-2 security requirements?
Yes, the AT97SC3204T-U2MB-10 incorporates a FIPS 140-2-compliant hardware Random Number Generator (RNG) used for key generation and TCG protocol functions. While the full module is not FIPS 140-2 certified as a standalone cryptographic module, its RNG subsystem satisfies the entropy source requirements defined in FIPS 140-2 Annex C.
What is the maximum RSA key size supported by the AT97SC3204T-U2MB-10 crypto engine?
The AT97SC3204T-U2MB-10 hardware crypto engine supports RSA key sizes up to 2048 bits, with documented performance of ≤200ms for a 2048-bit RSA signature operation and ≤40ms for a 1024-bit RSA signature. It does not support RSA-3072 or ECC-based algorithms.
Is the AT97SC3204T-U2MB-10 qualified for industrial temperature operation?
Yes, the AT97SC3204T-U2MB-10 is specified for industrial temperature range operation from -40°C to +85°C. This rating applies to the U2MB variant (40-pin QFN package) and is confirmed in Atmel's ordering information and package documentation.
How much nonvolatile user storage is available on the AT97SC3204T-U2MB-10?
The AT97SC3204T-U2MB-10 provides 1756 bytes of nonvolatile (NV) storage space in on-chip EEPROM for user-defined data, including sealed blobs, platform configuration records, and custom policy objects. This space is logically partitioned and managed via TCG-defined NV write/read commands.
AT97SC3204T-U2MB-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 40-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:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
AT97SC3204T-U2MB-10 FAQ
1.How can I place an order for AT97SC3204T-U2MB-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U2MB-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 AT97SC3204T-U2MB-10 reliable?
The price and inventory of AT97SC3204T-U2MB-10 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-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U2MB-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U2MB-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U2MB-10?
AT97SC3204T-U2MB-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U2MB-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 AT97SC3204T-U2MB-10?
For technical support, including AT97SC3204T-U2MB-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U2MB-10 requirements.
6.How does Aetrix verify that AT97SC3204T-U2MB-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U2MB-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 AT97SC3204T-U2MB-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U2MB-10?
All AT97SC3204T-U2MB-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U2MB-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 AT97SC3204T-U2MB-10 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U2MB-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-U2MB-10 Tags
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CYPD3175-24LQXQ
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SLB9670VQ20FW785XTMA1
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SLM9670AQ20FW1311XTMA1
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