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Microchip Technology AT97SC3204T-X2A1B-10
- Part No.:
- AT97SC3204T-X2A1B-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204T-X2A1B-10.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:755
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Product details
Overview
AT97SC3204T-X2A1B-10 from Microchip Technology (formerly 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 AT97SC3204T-X2A1B-10 datasheet, AT97SC3204T-X2A1B-10 pinout, AT97SC3204T-X2A1B-10 application, or AT97SC3204T-X2A1B-10 equivalent, this page delivers verified package mapping (40-pin QFN), LPC interface timing, secure key storage architecture, and industrial-grade (-40°C to +85°C) operation - all critical for BIOS-level TPM deployment and OEM qualification.
Technical Context
The AT97SC3204T-X2A1B-10 implements a dedicated TCG-compliant security subsystem with integrated AVR CPU, EEPROM-based RSA key storage, and hardware-accelerated SHA-1 (20μs/64-byte block). Its LPC interface supports SIRQ and CLKRUN# for power-managed interrupt signaling and clock gating in mobile platforms.
Security functions are enforced via physical tamper resistance, dynamic internal memory management for key caching, and a FIPS-approved PRNG used for both TCG protocol operations and system-level random number generation - all executed without host OS intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 and PC Client-specific TIS 1.2 - ensures interoperability with Windows BitLocker, Linux tpm-tools, and UEFI firmware stacks. |
| RSA Performance | 2048-bit signature in 200ms - enables secure boot attestation within BIOS POST timing constraints. |
| SHA-1 Acceleration | 20μs per 64-byte block - supports rapid PCR extension during platform measurement sequences. |
| NV Storage | 1756 bytes user-defined data - sufficient for storing multiple sealed keys, certificates, and policy objects. |
| Supply Voltage | 3.3V ±5% - matches standard LPC bus voltage domain; no level-shifting required on motherboard. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended-temperature PC/embedded applications. |
| LPC Clock | 33MHz - aligns with standard LPC bus timing; supports CLKRUN# for dynamic clock stop during idle. |
Pinout & Package
AT97SC3204T-X2A1B-10 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch), RoHS-compliant and lead-free. Pinout reflects full LPC interface support including LAD[0:3], LFRAME#, LCLK, SERIRQ, CLKRUN#, and LPCPD#.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary 3.3V supply | Power domain for core logic, crypto engine, and EEPROM; decoupling required per QFN layout guidelines. |
| SB3V | Standby 3.3V supply | Maintains RTC and volatile state during S3/S4 sleep; isolated from VCC for low-leakage retention. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data channel; requires pull-up resistors and controlled trace impedance. |
| LCLK | 33MHz LPC clock input | Driven by southbridge; jitter tolerance ≤100 ps RMS; synchronous to all LPC transactions. |
| SERIRQ | Serialized interrupt request | Shares IRQ line with other LPC devices; requires external pull-up and proper arbitration in BIOS. |
| CLKRUN# | PCI clock run control | Enables dynamic clock gating for power savings; asserted low to request clock enable from chipset. |
| LPCPD# | LPC power-down input | Signals chipset to enter low-power state; must be synchronized with LRESET# during wake events. |
| 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 reset coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware asymmetric crypto engine | Offloads RSA key generation, signing, and sealing from host CPU - reduces boot latency and eliminates software-side side-channel exposure. |
| FIPS 140-2–compliant RNG | Provides cryptographically secure entropy directly to TCG protocols and system drivers - eliminates reliance on OS-based /dev/random seeding. |
| Internal EEPROM key storage | Persists RSA private keys in tamper-resistant nonvolatile memory - prevents extraction via cold-boot or DMA attacks. |
| LPC interface with SIRQ/CLKRUN# | Enables seamless integration into x86 PC architectures with legacy BIOS and UEFI firmware - no PCIe or dedicated controller required. |
| Turnkey firmware integration | Factory-programmed TCG-compliant firmware eliminates field flashing risk and accelerates OEM qualification cycles. |
Applications
| Desktop PC Security | Industrial Embedded Control |
|---|---|
|
Use Scenario: Secure boot and disk encryption on business desktops using Windows BitLocker or Linux LUKS. IC Role / Device Role / Timing Role: Root-of-trust anchor that measures firmware, bootloader, and OS kernel before execution; provides sealed storage for encryption keys. Use Value: Prevents offline brute-force attacks on encrypted drives by binding decryption keys to unmodified platform state measured by AT97SC3204T-X2A1B-10. |
Use Scenario: Firmware integrity verification and secure remote update in programmable logic controllers (PLCs) operating in harsh environments. IC Role / Device Role / Timing Role: TPM-resident PCR registers store hash chains of bootloader, FPGA bitstream, and application firmware; attestation reports verify authenticity before update. Use Value: Ensures only signed, vendor-authorized firmware executes on AT97SC3204T-X2A1B-10–secured PLCs - mitigating supply-chain compromise risks. |
| Thin Client Authentication | Medical Device Data Integrity |
|
Use Scenario: Zero-touch provisioning and certificate-based authentication for cloud-connected thin clients in enterprise VDI deployments. IC Role / Device Role / Timing Role: Generates and stores device identity keys; signs challenge-response tokens during TLS handshake with identity provider. Use Value: Enables hardware-rooted device identity that survives OS reinstallation - eliminating credential theft via image cloning. |
Use Scenario: HIPAA-compliant audit log signing and patient data encryption in portable diagnostic equipment (e.g., ultrasound, ECG). IC Role / Device Role / Timing Role: Signs timestamped sensor data streams and encrypts stored records using keys bound to AT97SC3204T-X2A1B-10's secure NV storage. Use Value: Provides cryptographic proof of data origin and integrity - satisfying regulatory requirements for tamper-evident medical records. |
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 speed (≈120ms); 32-pin QFN package. | Required for Windows 11 compliance and modern UEFI Secure Boot; lacks direct LPC TIS 1.2 compatibility. | Select when upgrading to TPM 2.0 mandates or requiring stronger algorithm support; not drop-in compatible with AT97SC3204T-X2A1B-10 firmware. |
| Nuvoton NPCT750 | TPM 1.2 compliant; identical LPC interface and pinout; 28-pin TSSOP option; lower NV storage (1024 bytes). | Drop-in replacement for cost-sensitive designs where footprint and firmware compatibility are prioritized over extended NV capacity. | Valid alternative if board layout uses 28-pin TSSOP and 1756-byte NV space is unused; same driver stack and BIOS integration effort. |
Compared with Infineon SLB9670 and Nuvoton NPCT750, AT97SC3204T-X2A1B-10 offers larger NV storage and industrial temperature range in a 40-pin QFN, making it optimal for legacy TPM 1.2 deployments requiring extended environmental resilience and firmware-sealed key persistence - without demanding TPM 2.0 migration.
Availability
AT97SC3204T-X2A1B-10 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial PLC security upgrades, and medical device certification requiring stable component supply and long-term lifecycle assurance.
Supply support for AT97SC3204T-X2A1B-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 lines, delivering secure microcontrollers and TPM solutions for embedded and PC platforms.
The AT97SC3204 product line was designed specifically for TCG-compliant hardware root-of-trust implementation in x86 systems, emphasizing LPC bus integration, firmware immutability, and physical security against probing and fault injection.
FAQ
What is the primary interface protocol supported by the AT97SC3204T-X2A1B-10?
The AT97SC3204T-X2A1B-10 implements the Low Pin Count (LPC) bus interface per TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. It uses LAD[0:3], LFRAME#, LCLK, SERIRQ, and CLKRUN# signals to communicate with the chipset, enabling direct integration into standard x86 motherboard designs without additional bridge logic. This interface is mandatory for legacy BIOS and early UEFI implementations requiring TPM 1.2 support.
Does the AT97SC3204T-X2A1B-10 support TPM 2.0 functionality?
No, the AT97SC3204T-X2A1B-10 is strictly compliant with TCG TPM specification version 1.2 and does not implement TPM 2.0 algorithms, commands, or structures. It lacks support for ECC cryptography, SHA-256, and the hierarchical authorization model defined in TPM 2.0. For TPM 2.0 compliance, users must select alternatives such as the Infineon SLB9670 or STMicroelectronics ST33TPHF2ES.
What is the function of the GPIO-Express-00 pin on the AT97SC3204T-X2A1B-10?
The GPIO-Express-00 pin on the AT97SC3204T-X2A1B-10 is assigned to TPM_NV_INDEX_GPIO_00 per the TCG specification and serves as a configurable general-purpose I/O. It can be used by platform firmware to signal TPM readiness, coordinate reset sequencing, or expose platform-specific status flags - all under strict TCG-defined access controls to prevent unauthorized manipulation.
How is secure key storage implemented in the AT97SC3204T-X2A1B-10?
The AT97SC3204T-X2A1B-10 uses on-chip EEPROM to store RSA private keys and other sensitive cryptographic material. This memory is physically isolated from the main data path and accessible only through authenticated TCG commands. Key loading, sealing, and unsealing operations occur entirely within the secure boundary of the AT97SC3204T-X2A1B-10, preventing exposure to host memory or DMA channels.
Is the AT97SC3204T-X2A1B-10 qualified for industrial temperature operation?
Yes, the AT97SC3204T-X2A1B-10 is rated for industrial temperature operation from -40°C to +85°C, as confirmed in the official Atmel ordering information and package documentation. This rating applies to the specific X2A1B-10 variant and makes the device suitable for use in extended-temperature environments such as factory automation controllers, transportation systems, and outdoor kiosks where commercial-grade components would fail.
AT97SC3204T-X2A1B-10 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-X2A1B-10 FAQ
1.How can I place an order for AT97SC3204T-X2A1B-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-X2A1B-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-X2A1B-10 reliable?
The price and inventory of AT97SC3204T-X2A1B-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-X2A1B-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-X2A1B-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-X2A1B-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-X2A1B-10?
AT97SC3204T-X2A1B-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-X2A1B-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-X2A1B-10?
For technical support, including AT97SC3204T-X2A1B-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-X2A1B-10 requirements.
6.How does Aetrix verify that AT97SC3204T-X2A1B-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-X2A1B-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-X2A1B-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-X2A1B-10?
All AT97SC3204T-X2A1B-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-X2A1B-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-X2A1B-10 part is unused and in its original packaging.
Return procedure for AT97SC3204T-X2A1B-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-X2A1B-10 Tags
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