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Microchip Technology AT97SC3204-U2A16-00
- Part No.:
- AT97SC3204-U2A16-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-U2A16-00.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3204-U2A16-00 from Atmel is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and LPC Interface Specification 1.2, 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 operates at 3.3V on a 33MHz LPC bus and targets PC motherboard security integration.
For engineers reviewing the AT97SC3204-U2A16-00 datasheet, AT97SC3204-U2A16-00 pinout, AT97SC3204-U2A16-00 application, or AT97SC3204-U2A16-00 equivalent, key selection criteria include LPC interface timing compliance, TCG 1.2 firmware certification status, GPIO-Express-00 assignment, industrial temperature range (-40°C to +85°C), and QFN-40 package mechanical compatibility.
Technical Context
The AT97SC3204-U2A16-00 implements a full 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 key storage. Its LPC interface supports SIRQ and CLKRUN# for power-aware host coordination.
Security architecture includes physical tamper detection circuitry, secure boot ROM, and dynamic memory management for RSA key caching without host intervention. The RNG is FIPS 140-2 validated and directly accessible by both TPM firmware and host system for entropy seeding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification and PC Client-specific TIS 1.2 - ensures interoperability with Windows BitLocker, Linux tpm-tools, and UEFI firmware stacks. |
| LPC Interface Speed | 33MHz clock support - matches standard LPC bus timing for direct integration into Intel/AMD chipset reference designs. |
| RSA Performance | 2048-bit signature in ≤200ms - meets TCG latency requirements for platform authentication during boot and attestation workflows. |
| RNG Certification | FIPS 140-2 compliant - provides cryptographically secure entropy for key generation and protocol nonces without external seeding. |
| NV Storage Capacity | 1756 bytes user-defined data - sufficient for storing multiple sealed keys, platform configuration registers (PCRs), and policy objects. |
| Supply Voltage | 3.3V ±10% - compatible with standard LPC I/O voltage domains and eliminates need for level-shifting on motherboard traces. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems including thin clients, kiosks, and edge servers. |
Pinout & Package
AT97SC3204-U2A16-00 is packaged in a 40-pad QFN (6.0mm × 6.0mm, 0.50mm pitch), per JEDEC MO-220 WJJD-2. Pinout reflects LPC bus signaling with dual supply rails (VCC and SB3V), dedicated interrupt (SERIRQ), clock control (CLKRUN#), and one configurable GPIO (GPIO-Express-00).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply input | Power domain for core logic, crypto engine, and LPC I/O buffers; requires local 100nF decoupling. |
| SB3V | Standby 3.3V supply input | Independent rail for RTC and wake logic; enables low-power suspend/resume without full VCC shutdown. |
| LAD0–LAD3 | LPC bidirectional data/address/command lines | Time-multiplexed 4-bit bus carrying all TCG command traffic; requires controlled-impedance routing per LPC spec. |
| LFRAME# | LPC frame strobe input | Active-low signal indicating start of LPC transaction; synchronizes host-to-device command framing. |
| SERIRQ | Serialized interrupt request | Open-drain output used to assert IRQ10/IRQ11 via LPC SERIRQ bus; supports shared interrupt arbitration. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per firmware mapping; usable for platform-specific status signaling or reset coordination. |
| LRESET# | PCI/LPC reset input | Asynchronous active-low reset that clears TPM state and forces reinitialization of crypto engines and RNG. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA Accelerator | Offloads 1024/2048-bit modular exponentiation from host CPU, reducing boot-time attestation latency to sub-200ms. |
| FIPS 140-2 RNG | Delivers certified entropy directly to firmware and host OS, eliminating reliance on software PRNGs for key derivation. |
| Integrated TPM Firmware | Turnkey implementation of TCG 1.2 command set - no external flash or firmware update required for basic provisioning. |
| LPC Power Management | CLKRUN# support enables dynamic clock gating during idle, reducing platform standby power by up to 15mW. |
| Secure Key Storage | Internal EEPROM stores RSA private keys with hardware write-protection - keys never exposed to host memory or bus. |
Applications
| Desktop PC Security | Industrial Thin Client |
|---|---|
|
Use Scenario: Secure boot and disk encryption on x86-based desktop motherboards using UEFI firmware and Windows BitLocker. IC Role / Device Role / Timing Role: Root-of-trust anchor providing PCR extension, key sealing/unsealing, and remote attestation via LPC interface. Use Value: Enables hardware-backed cryptographic binding between firmware, OS, and storage - prevents offline brute-force attacks on encrypted volumes. |
Use Scenario: Tamper-resistant identity and credential storage in factory-floor thin clients running locked-down Linux. IC Role / Device Role / Timing Role: Persistent secure element managing TLS client certificates, device identity keys, and firmware integrity hashes. Use Value: Ensures credential confidentiality across power cycles and firmware updates, meeting IEC 62443-3-3 asset protection requirements. |
| Embedded Edge Server | Kiosk Authentication System |
|
Use Scenario: Remote attestation and secure key injection during automated provisioning of edge compute nodes in distributed IoT infrastructure. IC Role / Device Role / Timing Role: TPM 1.2 endpoint responding to TCG-compliant challenge-response protocols over LPC-connected BMC. Use Value: Provides verifiable hardware identity and measured boot logs to cloud orchestrators, enabling zero-touch enrollment with audit trail. |
Use Scenario: Multi-tenant public kiosk requiring per-session cryptographic isolation and PCI DSS–compliant cardholder data handling. IC Role / Device Role / Timing Role: Isolated key vault for session encryption keys and EMV tokenization keys, accessed only via authenticated LPC commands. Use Value: Prevents key extraction via memory dump or bus snooping - satisfies PCI PTS v6.0 requirement for logical key separation. |
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 | Supports both LPC and SPI interfaces; includes optional ECC acceleration not present in AT97SC3204-U2A16-00. | Enables flexible host interface choice in space-constrained designs where SPI routing is preferred over LPC. | Select when multi-interface flexibility or ECC-based attestation (e.g., for ARM-based platforms) is required. |
| Nuvoton NPCT750YX | Offers extended TCG 2.0 backward compatibility mode and larger 2KB NV storage vs. 1756B in AT97SC3204-U2A16-00. | Supports migration path toward TPM 2.0 while maintaining 1.2 operation - suitable for long-lifecycle industrial programs. | Select when future-proofing against TPM 2.0 adoption or needing additional NV space for extended policy objects. |
Compared with SLB9665TT2.0 and NPCT750YX, AT97SC3204-U2A16-00 delivers optimized cost and footprint for pure LPC-based TCG 1.2 deployments, with verified industrial temperature operation and minimal BOM overhead - ideal for high-volume PC OEMs and fixed-function embedded systems.
Availability
AT97SC3204-U2A16-00 is available at Aetrix Electronics and suitable for desktop motherboard security, industrial thin client authentication, and embedded edge server attestation requiring stable component supply and long-term lifecycle assurance.
Supply support for AT97SC3204-U2A16-00 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 secure microcontrollers and trusted computing solutions for industrial and computing markets.
The AT97SC3204 product line delivers fully integrated, pre-certified TPM modules targeting PC platform security and embedded systems requiring hardware-rooted trust - designed to simplify TCG compliance without firmware development overhead.
FAQ
What is the primary interface type supported by the AT97SC3204-U2A16-00?
The AT97SC3204-U2A16-00 uses a Low Pin Count (LPC) interface operating at 33MHz, compliant with TCG PC Client-specific TPM Interface Specification 1.2. It supports LAD0–LAD3 data lines, LFRAME#, SERIRQ, and CLKRUN# signals for full TCG command execution and power-aware host coordination. No SPI or I²C interface is implemented in the AT97SC3204-U2A16-00.
Does the AT97SC3204-U2A16-00 include certified cryptographic functions?
Yes, the AT97SC3204-U2A16-00 integrates a FIPS 140-2–certified Random Number Generator (RNG) and hardware-accelerated RSA signing (1024-bit in 40ms, 2048-bit in 200ms). Its TPM firmware implements the full TCG TPM 1.2 command set, and the device is qualified for use in systems requiring NIST SP 800-155 or ISO/IEC 11889 compliance.
What package variant does the AT97SC3204-U2A16-00 use?
The AT97SC3204-U2A16-00 is supplied in a 40-pad Very-thin Quad Flat No Lead (VQFN) package measuring 6.0mm × 6.0mm with 0.50mm pitch, per JEDEC MO-220 WJJD-2. This differs from the 28-pin TSSOP variants in the AT97SC3204 family and provides higher I/O density and improved thermal performance for compact motherboard layouts.
Is the AT97SC3204-U2A16-00 qualified for industrial temperature operation?
Yes, the AT97SC3204-U2A16-00 is rated for -40°C to +85°C operation, making it suitable for industrial thin clients, edge servers, and kiosk systems deployed in uncontrolled environments. This industrial grade qualification is explicitly confirmed in the Atmel ordering addendum and datasheet summary revision history.
How is secure key storage implemented in the AT97SC3204-U2A16-00?
The AT97SC3204-U2A16-00 uses internal EEPROM to store RSA private keys with hardware-enforced write protection - keys cannot be read out via LPC commands or debug interfaces. The device also provides 1756 bytes of user-configurable NV storage for sealed data, PCR values, and policy objects, all protected by TPM authorization hierarchies.
AT97SC3204-U2A16-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- 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:
- LPC
- Number of I/O:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-U2A16-00 FAQ
1.How can I place an order for AT97SC3204-U2A16-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-U2A16-00 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 AT97SC3204-U2A16-00 reliable?
The price and inventory of AT97SC3204-U2A16-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-U2A16-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-U2A16-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-U2A16-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-U2A16-00?
AT97SC3204-U2A16-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-U2A16-00 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 AT97SC3204-U2A16-00?
For technical support, including AT97SC3204-U2A16-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-U2A16-00 requirements.
6.How does Aetrix verify that AT97SC3204-U2A16-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-U2A16-00 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 AT97SC3204-U2A16-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-U2A16-00?
All AT97SC3204-U2A16-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-U2A16-00, 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 AT97SC3204-U2A16-00 part is unused and in its original packaging.
Return procedure for AT97SC3204-U2A16-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-U2A16-00 Tags
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