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Microchip Technology AT97SC3204T-X2A17-00
- Part No.:
- AT97SC3204T-X2A17-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204T-X2A17-00.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,104
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Product details
Overview
AT97SC3204T-X2A17-00 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, FIPS 140-2-compliant RNG, 33MHz LPC interface, and 1756-byte NV user storage. It operates at 3.3V and supports industrial temperature range (−40°C to +85°C) in 40-pad QFN package.
For engineers reviewing the AT97SC3204T-X2A17-00 datasheet, AT97SC3204T-X2A17-00 pinout, AT97SC3204T-X2A17-00 application, or AT97SC3204T-X2A17-00 equivalent, this page delivers verified technical context, LPC bus timing constraints, secure key storage architecture, GPIO-Express-00 assignment, and industrial-grade thermal validation - all critical for BIOS integration, platform attestation, and OEM security module qualification.
Technical Context
The AT97SC3204T-X2A17-00 implements a dedicated TCG-compliant security subsystem with on-chip 2048-bit RSA acceleration (200ms signature), SHA-1 processing (20μs/64-byte block), and dynamic internal key cache management via TPM_FlushSpecific/TPM_LoadKey2 commands. Its LPC interface supports SIRQ and CLKRUN# for interrupt signaling and clock-gating power savings in mobile platforms.
Security execution relies on physically isolated circuitry, internal EEPROM for RSA key storage, and a hardware RNG seeded by analog entropy sources - all validated under FIPS 140-2 requirements. The device integrates ROM-resident firmware and requires no external boot code, delivering turnkey TPM functionality upon power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client TIS 1.2 specifications - enables interoperable platform authentication and sealed storage. |
| LPC Interface Speed | 33MHz synchronous operation - matches standard PC chipset LPC timing for plug-and-play BIOS integration. |
| RSA Performance | 2048-bit signature in 200ms; 1024-bit signature in 40ms - meets TCG-defined latency thresholds for boot-time attestation. |
| Secure Storage | 1756 bytes of NV user-defined data space - supports persistent policy variables, credentials, and measurement logs. |
| Operating Voltage | 3.3V ±10% supply - compatible with standard LPC bus voltage domains and eliminates level-shifting requirements. |
| Temperature Range | −40°C to +85°C industrial grade - qualified for extended thermal environments in embedded servers and ruggedized clients. |
| Random Number Generator | FIPS 140-2–certified hardware RNG - provides cryptographically secure entropy for key generation and protocol nonces. |
Pinout & Package
AT97SC3204T-X2A17-00 is packaged in a 40-pad QFN (6.0mm × 6.0mm body, 0.50mm pitch), per JEDEC MO-220 WJJD-2, with exposed thermal pad. Pinout reflects LPC bus signaling, dedicated GPIO, and dual supply rails (VCC/SB3V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply rail | Power domain for core logic, crypto engine, and SRAM - must be decoupled within 5mm of pin. |
| SB3V | Standby 3.3V supply | Independent power for RTC and wake logic during S3/S4 sleep states - enables persistent TPM state retention. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data bus - supports TCG-specified LPC frame protocol with parity and error detection. |
| LCLK | 33MHz system clock input | Synchronous reference for all LPC transactions - requires low-jitter source aligned to chipset clock tree. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction cycle - defines timing boundaries for address latching and data sampling. |
| SERIRQ | Serialized interrupt request | Open-drain shared interrupt line - carries TPM-specific events (e.g., command completion, error assertion) to southbridge. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per TCG spec - usable for platform-specific control signals or status reporting. |
| LPCPD# | LPC power-down control | Asserted by host to place TPM in low-power suspend mode - reduces current draw to <100μA during idle periods. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware asymmetric crypto engine | Offloads RSA-2048 signing and SHA-1 hashing from host CPU - reduces boot time and eliminates software-side side-channel exposure. |
| Internal EEPROM for RSA keys | Non-volatile, tamper-resistant storage for up to 16 RSA key pairs - prevents key extraction via physical probing or memory dump. |
| 33MHz LPC bus interface | Direct compatibility with Intel/AMD chipset LPC controllers - eliminates need for bridge ICs or custom interface logic. |
| FIPS 140-2–compliant RNG | Entropy sourced from analog noise circuits and validated by NIST SP800-22 tests - satisfies cryptographic key generation requirements for government and enterprise systems. |
| Secure hardware/firmware layout | Physically isolated crypto blocks, bus encryption, and anti-tamper mesh layers - resists fault injection, glitching, and differential power analysis attacks. |
Applications
| Desktop PC Security | Embedded Industrial Controller |
|---|---|
Use Scenario: Secure boot and remote attestation in business desktops requiring BitLocker encryption and Windows Hello support. IC Role / Device Role / Timing Role: Root-of-trust anchor that measures BIOS, bootloader, and OS kernel integrity before execution - responds to LPC read/write cycles within 33MHz timing budget. Use Value: Enables hardware-enforced chain-of-trust with measured boot logs stored in 1756-byte NV space - meets Microsoft SDL and TCG PC Client requirements. | Use Scenario: Firmware update authentication and runtime integrity monitoring in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Standalone security co-processor interfacing via LPC to ARM-based controller SoC - maintains secure state across power cycles using SB3V-supplied RTC domain. Use Value: Prevents unauthorized firmware flash via signed update verification using on-chip RSA engine - industrial temp rating ensures reliability in uncooled control cabinets. |
| Server Platform Authentication | Thin Client Identity Management |
Use Scenario: Hardware-based identity binding for bare-metal provisioning in cloud infrastructure servers. IC Role / Device Role / Timing Role: TPM endpoint responding to BMC-initiated LPC commands for quote generation and sealed storage - leverages CLKRUN# to gate clocks during idle to reduce platform power. Use Value: Provides verifiable platform configuration data to hypervisors and orchestration tools - 2048-bit RSA keys enable long-term credential validity without periodic rotation. | Use Scenario: Credential vault and single-sign-on token storage in zero-client endpoints used in healthcare kiosks and financial terminals. IC Role / Device Role / Timing Role: Isolated secrets manager communicating over LPC with x86 application processor - uses GPIO-Express-00 to signal tamper events to host watchdog circuitry. Use Value: Stores biometric templates and PKI certificates in encrypted NV space - FIPS 140-2 RNG ensures cryptographically strong session keys for TLS handshakes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9670 | Supports TPM 2.0 specification; includes ECC acceleration; uses SPI instead of LPC interface. | Requires SPI-capable host controller and updated BIOS drivers; not drop-in LPC replacement. | Select when upgrading to TPM 2.0 compliance and ECC-based key exchange is required. |
| Nuvoton NPCT750 | TPM 1.2–compliant; LPC interface; lower NV storage (1024 bytes); commercial temp only (0°C to 70°C). | Limited user data space and narrower thermal range - unsuitable for industrial deployments requiring extended temperature operation. | Select for cost-sensitive commercial desktop designs where industrial temp rating and full 1756-byte NV space are not required. |
Compared with SLB9670 and NPCT750, AT97SC3204T-X2A17-00 uniquely combines industrial temperature support, 1756-byte NV storage, and native LPC timing compliance - making it optimal for legacy BIOS platforms needing field-proven TPM 1.2 security without interface redesign or thermal derating.
Availability
AT97SC3204T-X2A17-00 is available at Aetrix Electronics and suitable for desktop PC security, embedded industrial controllers, server platform authentication, and thin client identity management requiring stable component supply and long-term lifecycle assurance.
Supply support for AT97SC3204T-X2A17-00 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 - with deep expertise in embedded security and trusted computing.
The AT97SC3204 product line delivers certified TPM 1.2 modules designed specifically for PC client and industrial embedded platforms requiring hardware-rooted trust, secure boot, and cryptographic key protection without external firmware dependencies.
FAQ
What is the primary security function of the AT97SC3204T-X2A17-00?
The AT97SC3204T-X2A17-00 serves as a hardware root-of-trust implementing the TCG TPM 1.2 specification. It performs cryptographic operations including RSA-2048 signing, SHA-1 hashing, and secure key generation using its FIPS 140-2–compliant RNG. The AT97SC3204T-X2A17-00 stores keys in internal EEPROM and provides 1756 bytes of NV user storage for platform measurements and policies - enabling secure boot, remote attestation, and sealed storage in PCs and embedded systems.
Does the AT97SC3204T-X2A17-00 support both commercial and industrial temperature ranges?
Yes, the AT97SC3204T-X2A17-00 is qualified for industrial operation from −40°C to +85°C, as confirmed in the ordering information and package documentation. This makes the AT97SC3204T-X2A17-00 suitable for deployment in harsh environments such as factory automation controllers, outdoor kiosks, and network infrastructure equipment where extended thermal stability is required.
What package type is used for the AT97SC3204T-X2A17-00?
The AT97SC3204T-X2A17-00 uses a 40-pad QFN package (6.0mm × 6.0mm body, 0.50mm pitch), designated as 40ML1 per Atmel's ordering code. This VQFN package complies with JEDEC MO-220 WJJD-2 and includes an exposed thermal pad for enhanced heat dissipation - critical for sustained crypto engine operation in thermally constrained PCB layouts.
How does the AT97SC3204T-X2A17-00 interface with the host system?
The AT97SC3204T-X2A17-00 interfaces exclusively via the 33MHz Low Pin Count (LPC) bus, supporting LAD0–LAD3 data/address lines, LCLK, LFRAME#, SERIRQ, and CLKRUN#. It requires no external drivers beyond standard TCG-compliant BIOS or UEFI firmware - the AT97SC3204T-X2A17-00 integrates ROM-resident firmware and handles all TIS 1.2 protocol layers internally.
Is the AT97SC3204T-X2A17-00 compatible with TPM 2.0 standards?
No, the AT97SC3204T-X2A17-00 implements only TPM 1.2 and associated TIS 1.2 specifications. It does not support TPM 2.0 features such as ECC algorithms, hierarchical key structures, or command authorization enhancements. For TPM 2.0 compliance, designers must select alternatives like the Infineon SLB9670 - the AT97SC3204T-X2A17-00 remains optimized for legacy BIOS platforms requiring field-proven TPM 1.2 functionality.
AT97SC3204T-X2A17-00 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:
- I2C
- Number of I/O:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204T-X2A17-00 FAQ
1.How can I place an order for AT97SC3204T-X2A17-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-X2A17-00 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-X2A17-00 reliable?
The price and inventory of AT97SC3204T-X2A17-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-X2A17-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-X2A17-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-X2A17-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-X2A17-00?
AT97SC3204T-X2A17-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-X2A17-00 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-X2A17-00?
For technical support, including AT97SC3204T-X2A17-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-X2A17-00 requirements.
6.How does Aetrix verify that AT97SC3204T-X2A17-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-X2A17-00 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-X2A17-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-X2A17-00?
All AT97SC3204T-X2A17-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-X2A17-00, 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-X2A17-00 part is unused and in its original packaging.
Return procedure for AT97SC3204T-X2A17-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-X2A17-00 Tags
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