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Microchip Technology AT97SC3204T-U2A17-00
- Part No.:
- AT97SC3204T-U2A17-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204T-U2A17-00.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
AT97SC3204T-U2A17-00 from Microchip Technology (formerly Atmel) is a TCG-compliant Trusted Platform Module implementing TPM 1.2 specification with hardware-based RSA crypto acceleration, FIPS 140-2–compliant RNG, 3.3V supply, and LPC interface for PC platform integration. It integrates an AVR RISC microprocessor, internal EEPROM for RSA keys, and 1756-byte NV user storage.
For engineers reviewing the AT97SC3204T-U2A17-00 datasheet, AT97SC3204T-U2A17-00 pinout, AT97SC3204T-U2A17-00 application, or AT97SC3204T-U2A17-00 equivalent, key selection considerations include LPC bus timing compliance, industrial temperature range (-40°C to +85°C), 40-pin QFN package, secure firmware execution, and TCG PC Client-specific TIS 1.2 interface support.
Technical Context
The AT97SC3204T-U2A17-00 implements a dedicated TPM 1.2 stack in hardware, including a cryptographic engine supporting 2048-bit RSA signature generation in ≤200ms and SHA-1 acceleration at 20μs per 64-byte block. Its AVR CPU executes certified firmware without external code execution.
It interfaces exclusively via the 33MHz Low Pin Count (LPC) bus with SIRQ and CLKRUN# signals for interrupt handling and clock gating in power-constrained systems. Internal physical security circuitry protects against side-channel and fault injection attacks during key operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TPM Specification | TCG TPM 1.2 compliant - ensures interoperability with BIOS/UEFI and OS-level trusted boot stacks. |
| LPC Interface | 33MHz synchronous bus - enables direct connection to host chipset without bridge logic or protocol translation. |
| RSA Performance | 2048-bit signature in ≤200ms - meets TCG latency requirements for platform authentication and attestation. |
| RNG Compliance | FIPS 140-2–certified hardware RNG - provides cryptographically secure entropy for key generation and protocol nonces. |
| Nonvolatile Storage | 1756 bytes user-defined NV space - supports persistent configuration, policy objects, and sealed data binding. |
| Operating Range | -40°C to +85°C - qualified for industrial embedded platforms requiring extended thermal reliability. |
| Supply Voltage | 3.3V ±5% - compatible with standard LPC domain power rails and eliminates need for level-shifting circuitry. |
Pinout & Package
AT97SC3204T-U2A17-00 is packaged in a 40-pad VQFN (6.0 mm × 6.0 mm, 0.50 mm pitch) with exposed thermal pad. This RoHS-compliant, lead-free package supports automated reflow assembly and thermal dissipation in compact motherboard layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply input | Primary power rail for core logic, crypto engine, and SRAM; requires local decoupling. |
| SB3V | Standby 3.3V supply input | Provides power to retention circuits during S3/S4 sleep states; enables wake-on-TPM events. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/data channel; supports burst transfers and TIS-compliant framing. |
| LCLK | 33MHz LPC clock input | Synchronous reference for all LPC transactions; must be clean, low-jitter, and stable during reset. |
| LFRAME# | LPC frame strobe input | Indicates start/end of LPC transaction cycle; synchronized to LCLK edge for timing-critical handshaking. |
| SERIRQ | Serialized interrupt request I/O | Shares IRQ line with other LPC peripherals; requires host-side SERIRQ decoder and routing configuration. |
| CLKRUN# | PCI clock run control I/O | Enables dynamic clock gating during idle periods to reduce platform power consumption in mobile designs. |
| LPCPD# | LPC power-down input | Asserted by host to place device in low-power state; retains NV contents and cryptographic context. |
| GPIO-Express-00 | General-purpose I/O | Configurable as TPM_NV_INDEX_GPIO_00 per TCG spec; supports platform-specific signaling or status reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware asymmetric crypto engine | Offloads RSA/SHA-1 computation from host CPU - reduces boot-time latency and prevents software-side key exposure. |
| Integrated AVR RISC microprocessor | Executes immutable, pre-certified TPM firmware - eliminates runtime code injection risk and simplifies firmware update validation. |
| Internal EEPROM for RSA keys | Stores private keys in tamper-resistant memory - prevents extraction via logical or physical probing during system operation. |
| Secure hardware layout & physical protection | Includes active mesh shielding, voltage/glitch monitors, and sensor-triggered zeroization - counters fault injection and side-channel analysis. |
| TCG PC Client-specific TIS 1.2 compliance | Guarantees interoperability with Intel PCH and AMD FCH chipsets - eliminates custom driver development for mainstream x86 platforms. |
Applications
| Server Platform Security | Industrial PC Boot Integrity |
|---|---|
Use Scenario: Secure boot chain enforcement in rack-mounted servers with remote attestation capability. IC Role / Device Role / Timing Role: Root-of-trust anchor performing measured boot, PCR extension, and remote quote generation. Use Value: Enables hardware-enforced chain-of-trust from power-on through hypervisor launch, meeting PCI-DSS and NIST SP 800-193 requirements. |
Use Scenario: Embedded IPCs deployed in factory automation systems requiring tamper-evident firmware updates. IC Role / Device Role / Timing Role: Persistent key vault and sealed storage controller for signed firmware images and runtime configuration. Use Value: Prevents unauthorized firmware modification via cryptographic sealing tied to hardware identity and platform state. |
| Medical Device Authentication | POS Terminal Data Protection |
Use Scenario: HIPAA-compliant diagnostic equipment requiring audit-log integrity and operator credential binding. IC Role / Device Role / Timing Role: Secure logging module generating time-stamped, digitally signed audit records stored in NV memory. Use Value: Provides cryptographically verifiable evidence of device usage, access attempts, and configuration changes for regulatory review. |
Use Scenario: Payment terminals processing EMV transactions where cardholder data must remain isolated from application software. IC Role / Device Role / Timing Role: Isolated key management unit encrypting PIN blocks and decrypting session keys under strict TCG policy controls. Use Value: Meets PCI PTS v6.0 requirements for secure cryptographic processing outside the main application processor boundary. |
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 | Same TCG TPM 1.2 compliance; uses ARM-based secure core instead of AVR; supports SPI interface in addition to LPC. | Broader interface flexibility but requires separate SPI driver stack; lacks GPIO-Express-00 pin for direct TPM_NV indexing. | Preferred when multi-interface support or ARM ecosystem alignment is required; verify LPC timing compatibility with host chipset. |
| Nuvoton NPCT750YAXX | TCG TPM 1.2–compliant; integrated 32-bit Cortex-M0+ core; supports both LPC and I²C; smaller 5×5mm QFN package. | Lower pin count and footprint ideal for space-constrained designs; I²C option simplifies integration in non-PC embedded systems. | Recommended for cost-sensitive industrial controllers where I²C connectivity suffices and 40-pin QFN layout is prohibitive. |
Compared with SLB9665TT2.0 and NPCT750YAXX, the AT97SC3204T-U2A17-00 offers deterministic LPC timing behavior optimized for legacy x86 BIOS environments, guaranteed industrial temperature operation without derating, and direct GPIO-Express-00 mapping for TCG-specified NV index access - making it optimal for high-reliability PC-compatible platforms.
Availability
AT97SC3204T-U2A17-00 is available at Aetrix Electronics and suitable for server platform security, industrial PC boot integrity, medical device authentication, and POS terminal data protection requiring stable component supply across long-lifecycle deployments.
Supply support for AT97SC3204T-U2A17-00 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
Microchip Technology acquired Atmel in 2016 and maintains full product support, documentation, and manufacturing continuity for the AT97SC3204 series.
The AT97SC3204 product line delivers certified, single-chip TPM 1.2 modules targeting PC client platforms, industrial control systems, and regulated medical devices requiring hardware-rooted trust anchors.
FAQ
What is the primary interface used by the AT97SC3204T-U2A17-00?
The AT97SC3204T-U2A17-00 uses a 33MHz Low Pin Count (LPC) bus interface compliant with TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. It supports LAD0–LAD3 data/address lines, LCLK, LFRAME#, SERIRQ, and CLKRUN# signals for full protocol handshake and power-aware operation. No secondary interfaces such as SPI or I²C are supported on this variant.
Does the AT97SC3204T-U2A17-00 support industrial temperature operation?
Yes, the AT97SC3204T-U2A17-00 is qualified for industrial temperature range operation from -40°C to +85°C. This rating is explicitly confirmed in the Atmel ordering information and applies to the U2A17-00 suffix variant, enabling deployment in harsh environments such as factory automation, transportation systems, and outdoor kiosks without thermal derating.
How much nonvolatile user storage does the AT97SC3204T-U2A17-00 provide?
The AT97SC3204T-U2A17-00 provides 1756 bytes of user-defined nonvolatile (NV) storage space, allocated within its internal EEPROM. This space is accessible via TCG-defined NV write/read commands and is protected by authorization policies, enabling secure storage of platform-specific keys, certificates, or configuration data that persists across power cycles.
Is the AT97SC3204T-U2A17-00 FIPS 140-2 certified?
The AT97SC3204T-U2A17-00 incorporates a FIPS 140-2–compliant Random Number Generator (RNG), validated per the specification's Annex C requirements. While the full module is not individually FIPS 140-2–certified as a standalone cryptographic module, its RNG subsystem meets the entropy generation and unpredictability criteria required for use in FIPS-aligned systems when integrated per TCG guidance.
What package type is used for the AT97SC3204T-U2A17-00?
The AT97SC3204T-U2A17-00 is supplied in a 40-pad Very-thin Quad Flat No Lead (VQFN) package, designated 40ML1, with 6.0 mm × 6.0 mm body size and 0.50 mm pitch. This RoHS-compliant, lead-free package features an exposed thermal pad and is optimized for high-density PCB layouts in space-constrained computing platforms.
AT97SC3204T-U2A17-00 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204T-U2A17-00 FAQ
1.How can I place an order for AT97SC3204T-U2A17-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U2A17-00 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-U2A17-00 reliable?
The price and inventory of AT97SC3204T-U2A17-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-U2A17-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U2A17-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U2A17-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U2A17-00?
AT97SC3204T-U2A17-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U2A17-00 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-U2A17-00?
For technical support, including AT97SC3204T-U2A17-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U2A17-00 requirements.
6.How does Aetrix verify that AT97SC3204T-U2A17-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U2A17-00 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-U2A17-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U2A17-00?
All AT97SC3204T-U2A17-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U2A17-00, 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-U2A17-00 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U2A17-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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