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Microchip Technology AT97SC3204T-X2MB-10
- Part No.:
- AT97SC3204T-X2MB-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3204T-X2MB-10.pdf
- Description:
- IC CRYPTO TPM TWI 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,206
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Product details
Overview
AT97SC3204T-X2MB-10 from Microchip Technology (formerly Atmel) is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications. It integrates an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2-compliant RNG, 1756-byte NV user storage, and 33MHz LPC interface - deployed in secure boot, platform authentication, and firmware integrity verification for desktop and embedded PCs.
For engineers reviewing the AT97SC3204T-X2MB-10 datasheet, AT97SC3204T-X2MB-10 pinout, AT97SC3204T-X2MB-10 application, or AT97SC3204T-X2MB-10 equivalent, key selection criteria include LPC bus timing compliance, industrial temperature range (-40°C to +85°C), 40-pin QFN package with GPIO-Express-00 support, and internal EEPROM-based RSA key storage.
Technical Context
The AT97SC3204T-X2MB-10 implements a dedicated TCG-compliant security subsystem using an on-chip AVR 8-bit RISC CPU, hardware-accelerated cryptographic primitives (RSA-2048, SHA-1 at 20μs/64B block), and dynamic key cache management without host intervention. Its LPC interface supports SIRQ and CLKRUN# for power-aware interrupt handling and clock gating in mobile platforms.
Security architecture includes physical tamper resistance, secure firmware execution, and isolated RNG output accessible to both TPM protocol stack and host system. The device uses internal EEPROM for persistent RSA key storage and provides 1756 bytes of user-defined NV space - all managed via standardized TCG command set over LPC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 and PC Client TIS 1.2 - ensures interoperability with BIOS, OS drivers, and management stacks across Windows/Linux enterprise environments. |
| RSA Performance | 2048-bit signature in 200ms; enables full key attestation during POST without measurable boot delay impact. |
| LPC Interface | 33MHz synchronous bus with LAD[3:0], LFRAME#, LCLK, SERIRQ, CLKRUN# - matches Intel PCH LPC timing requirements. |
| Operating Range | -40°C to +85°C industrial grade - qualified for extended-temperature motherboard and industrial PC deployments. |
| 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. |
| Supply Voltage | 3.3V ±10% VCC with separate SB3V standby rail - supports low-power suspend/resume states per ACPI specification. |
| NV Storage | 1756 bytes user-defined non-volatile memory - sufficient for storing multiple certificates, policy hashes, and sealed data blobs. |
Pinout & Package
AT97SC3204T-X2MB-10 is housed in a 40-pad Very-thin Quad Flat No-Lead (VQFN) package, 6.0 mm × 6.0 mm body, 0.50 mm pitch, with exposed thermal pad. Pinout optimized for LPC bus integration and system-level security signaling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply | Power domain for core logic, crypto engine, and EEPROM; requires local 100nF decoupling. |
| SB3V | Standby 3.3V supply | Maintains RTC and NV state during S3/S4 sleep; independent from main VCC sequencing. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data channel; supports burst transfers up to 4 bytes per cycle. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction; synchronized to LCLK edge. |
| SERIRQ | Serialized interrupt request | Open-drain shared interrupt line compatible with Intel LPC SERIRQ protocol (IRQ9 default). |
| CLKRUN# | PCI clock run control | Enables dynamic clock gating during idle periods to reduce platform power consumption. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per TCG spec; usable for platform-specific status signaling or debug. |
| LRESET# | Hardware reset input | Asynchronous active-low reset that clears internal state and forces reinitialization of crypto modules. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA Crypto Engine | Accelerates 1024-bit RSA signatures in 40ms and 2048-bit in 200ms - eliminates software-only bottlenecks in attestation workflows. |
| FIPS 140-2 RNG | Dedicated physical entropy source feeding a NIST-approved PRNG - satisfies cryptographic randomness requirements for key generation and challenge-response protocols. |
| Integrated AVR RISC Core | On-die 8-bit processor executing certified TPM firmware - enables secure boot path validation without external microcontroller dependency. |
| LPC Bus Compliance | Full support for TIS 1.2 timing, SIRQ arbitration, and CLKRUN# power management - seamless integration with Intel/AMD PCH chipsets. |
| EEPROM-Based Key Storage | Internal non-volatile memory stores RSA keys with write-protection and access control - prevents extraction or modification outside authorized TCG commands. |
Applications
| Secure Boot Validation | Firmware Integrity Attestation |
|---|---|
|
Use Scenario: Verifying signed UEFI firmware images before execution during system power-on self-test (POST). IC Role / Device Role / Timing Role: TPM acts as root-of-trust for measurement and signature verification; performs SHA-1 hashing and RSA signature check within 200ms. Use Value: Prevents unauthorized firmware modification by enforcing cryptographic chain-of-trust from hardware reset vector through bootloader. |
Use Scenario: Reporting runtime measurements of loaded OS components to remote management servers for compliance auditing. IC Role / Device Role / Timing Role: TPM generates cryptographically signed quotes of PCR registers containing hash logs of kernel, drivers, and hypervisor modules. Use Value: Enables real-time platform health assessment with tamper-evident evidence - critical for HIPAA, PCI-DSS, and NIST SP 800-193 compliance. |
| Platform Authentication | Sealed Data Storage |
|
Use Scenario: Authenticating a laptop to corporate network infrastructure prior to granting domain access or decrypting BitLocker volumes. IC Role / Device Role / Timing Role: TPM binds cryptographic keys to platform configuration registers (PCRs); releases keys only when measured state matches policy. Use Value: Enforces hardware-bound identity assurance - prevents credential reuse on compromised or cloned systems. |
Use Scenario: Storing encrypted credentials (e.g., Wi-Fi PSK, SSH keys) that unlock only when platform configuration remains unaltered. IC Role / Device Role / Timing Role: TPM encrypts data using a key bound to current PCR values; decryption fails if BIOS or boot loader is modified. Use Value: Provides persistent, hardware-enforced confidentiality for sensitive assets without relying on OS-level encryption keys. |
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 | TPM 2.0 compliant; supports ECC and SHA-256; higher RSA-2048 throughput (~150ms); requires different driver stack. | Required for Windows 11 certification and modern UEFI Secure Boot implementations; not backward-compatible with legacy TIS 1.2 BIOS. | Select SLB9670 when upgrading to TPM 2.0 mandates or requiring SHA-256 attestation; avoid for legacy BIOS-only platforms. |
| Nuvoton NPCT750 | TPM 1.2 compliant; same LPC interface; lower cost; 1024-bit RSA only (no 2048-bit acceleration); smaller NV space (1024B). | Suitable for cost-sensitive embedded clients where full 2048-bit key attestation is not required; limited to basic platform authentication. | Select NPCT750 for budget-constrained industrial gateways or thin clients needing minimal TPM functionality without 2048-bit support. |
Compared with Infineon SLB9670 and Nuvoton NPCT750, AT97SC3204T-X2MB-10 delivers verified 2048-bit RSA performance and industrial-grade reliability within the mature TCG 1.2 ecosystem - making it optimal for long-lifecycle PC motherboards and embedded systems requiring field-proven compatibility without TPM 2.0 migration overhead.
Availability
AT97SC3204T-X2MB-10 is available at Aetrix Electronics and suitable for secure boot validation, firmware integrity attestation, and platform authentication requiring stable component supply across industrial PC, medical device, and network appliance production programs.
Supply support for AT97SC3204T-X2MB-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
Microchip Technology acquired Atmel in 2016 and maintains its trusted computing product portfolio, delivering secure microcontrollers, TPMs, and cryptographic solutions for industrial, automotive, and communications markets.
The AT97SC3204 series was designed as a single-chip, turnkey TPM solution for PC client platforms - integrating hardware crypto acceleration, secure firmware, and LPC interface compliance to simplify BIOS integration and reduce time-to-certification.
FAQ
What is the operating temperature range for AT97SC3204T-X2MB-10?
The AT97SC3204T-X2MB-10 is rated for industrial operation from -40°C to +85°C. This range is validated per JEDEC JESD22-A104 and supports deployment in harsh environments such as factory automation controllers, outdoor kiosks, and vehicle-mounted computing systems where ambient temperatures exceed commercial limits. AT97SC3204T-X2MB-10 maintains full TCG 1.2 functionality across this entire range without derating.
Does AT97SC3204T-X2MB-10 support TPM 2.0?
No, AT97SC3204T-X2MB-10 implements only TCG TPM 1.2 and PC Client TIS 1.2 specifications. It does not support TPM 2.0 algorithms (ECC, SHA-256), command sets, or authorization structures. For TPM 2.0 compliance, Microchip offers the ATTPM20 family. AT97SC3204T-X2MB-10 remains fully supported for legacy BIOS and Windows 10 deployments requiring TCG 1.2 certification.
What package type is used for AT97SC3204T-X2MB-10?
AT97SC3204T-X2MB-10 uses a 40-pad VQFN package (6.0 mm × 6.0 mm body, 0.50 mm pitch) with exposed thermal pad. This package matches the "40ML1" ordering code variant and is distinct from the 28-pin TSSOP options. The QFN footprint supports high-density PCB layouts and provides improved thermal dissipation compared to TSSOP variants.
How is random number generation implemented in AT97SC3204T-X2MB-10?
AT97SC3204T-X2MB-10 incorporates a hardware entropy source feeding a FIPS 140-2–certified pseudo-random number generator (PRNG). The RNG is accessible to both internal TCG protocol functions (e.g., nonce generation) and the host system via LPC read commands. Output passes NIST SP 800-22 statistical tests and is used for RSA key pair generation, challenge-response sessions, and session key derivation.
Is AT97SC3204T-X2MB-10 pin-compatible with other AT97SC3204 variants?
Yes, AT97SC3204T-X2MB-10 shares identical pinout and electrical characteristics with other 40-pin QFN variants (e.g., AT97SC3204T-X2MB-08), differing only in temperature grade and marking. It is not pin-compatible with 28-pin TSSOP versions due to different pin count, layout, and thermal pad configuration. Board designs must match the 40ML1 footprint for AT97SC3204T-X2MB-10.
AT97SC3204T-X2MB-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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
AT97SC3204T-X2MB-10 FAQ
1.How can I place an order for AT97SC3204T-X2MB-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-X2MB-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-X2MB-10 reliable?
The price and inventory of AT97SC3204T-X2MB-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-X2MB-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-X2MB-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-X2MB-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-X2MB-10?
AT97SC3204T-X2MB-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-X2MB-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-X2MB-10?
For technical support, including AT97SC3204T-X2MB-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-X2MB-10 requirements.
6.How does Aetrix verify that AT97SC3204T-X2MB-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-X2MB-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-X2MB-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-X2MB-10?
All AT97SC3204T-X2MB-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-X2MB-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-X2MB-10 part is unused and in its original packaging.
Return procedure for AT97SC3204T-X2MB-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-X2MB-10 Tags
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