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Microchip Technology AT97SC3204-X2A16-00
- Part No.:
- AT97SC3204-X2A16-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-X2A16-00.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,142
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Product details
Overview
AT97SC3204-X2A16-00 from Microchip Technology (formerly Atmel) is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and LPC Interface Specification 1.2. 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 operates at 3.3V on a 33MHz LPC bus for PC platform security.
For engineers reviewing the AT97SC3204-X2A16-00 datasheet, AT97SC3204-X2A16-00 pinout, AT97SC3204-X2A16-00 application, or AT97SC3204-X2A16-00 equivalent, this page delivers verified technical context, LPC interface timing behavior, secure key storage architecture, GPIO-Express-00 assignment, and package-specific pin validation for OEM motherboard integration and BIOS-level TPM enablement.
Technical Context
The AT97SC3204-X2A16-00 implements a dedicated TCG-compliant security subsystem using an on-chip AVR 8-bit RISC CPU, hardware-accelerated RSA (1024-bit in 40ms, 2048-bit in 200ms) and SHA-1 (20μs/64-byte block), and internal EEPROM for persistent RSA key storage. It supports LPC bus signaling with LFRAME#, LAD[3:0], SIRQ via SERIRQ, and power management via CLKRUN# and LPCPD#.
Its physical security circuitry includes tamper-resistant layout, secure firmware execution, and dynamic internal memory management for key caching without host intervention. The device uses SB3V for standby 3.3V supply and provides GPIO-Express-00 as a configurable general-purpose I/O pin mapped to TPM_NV_INDEX_GPIO_00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client-specific TIS 1.2 - enables certified Windows BitLocker and Linux tpm-tools integration. |
| RSA Performance | 2048-bit signature in 200ms - meets TCG latency requirements for boot-time attestation and sealed storage operations. |
| LPC Interface | 33MHz clock, LAD[3:0], LFRAME#, SERIRQ, CLKRUN#, LPCPD# - directly replaces legacy LPC-based TPM modules without bridge logic. |
| Secure Storage | 1756 bytes of NV user-defined data + internal EEPROM for RSA keys - supports platform configuration registers (PCRs) and sealed encryption keys. |
| RNG Certification | FIPS 140-2 compliant hardware RNG - satisfies cryptographic entropy requirements for key generation and protocol randomness. |
| Supply Voltage | 3.3V main supply (VCC) + dedicated 3.3V standby rail (SB3V) - enables persistent state retention during S3/S4 sleep states. |
| Operating Range | Industrial grade: −40°C to +85°C - qualified for embedded industrial PCs and ruggedized client platforms. |
Pinout & Package
AT97SC3204-X2A16-00 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch, VQFN), per ordering code 40ML1. Pin functions are validated per Atmel-5295ES datasheet summary Table 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V Power Supply | Primary power domain for core logic and crypto engine; requires local decoupling per LPC interface guidelines. |
| SB3V | Standby 3.3V Supply | Maintains RTC-like state and NV storage during system suspend; must remain powered when VCC is off. |
| LAD0–LAD3 | LPC Bidirectional Data Bus | Time-multiplexed command/address/data lines; support TIS-compliant burst reads/writes and error detection. |
| LFRAME# | LPC Frame Strobe | Active-low signal indicating start/end of LPC transaction cycle; synchronizes host-to-TPM command framing. |
| SERIRQ | Serialized Interrupt Request | Open-drain bidirectional interrupt line used for TPM event notification (e.g., command completion, error). |
| CLKRUN# | LPC Clock Run Control | Enables dynamic clock gating for power savings in mobile platforms; asserted to request host resume clock. |
| GPIO-Express-00 | Configurable General-Purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per TCG specification; usable for platform-specific status signaling or debug. |
| LPCPD# | LPC Power-Down Input | Asserted by host to place TPM into low-power state; triggers internal power management sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Crypto Acceleration | Dedicated RSA and SHA-1 engines eliminate CPU offload overhead and ensure deterministic timing for attestation flows. |
| FIPS 140-2 RNG | On-die entropy source certified for cryptographic key generation - eliminates need for external entropy sources or software PRNG seeding. |
| Turnkey Firmware Integration | Pre-certified TCG-compliant firmware embedded in ROM/EEPROM - reduces qualification time and eliminates field firmware update risk. |
| LPC Interface Compliance | Full TIS 1.2 implementation including SIRQ, CLKRUN#, and LPCPD# - ensures plug-and-play compatibility with standard BIOS drivers. |
| Secure Key Storage | Internal EEPROM with write-protection and access control - prevents extraction of private keys even under physical probing. |
Applications
| Desktop PC Security | Industrial Embedded Control |
|---|---|
Use Scenario: Enabling BitLocker drive encryption and measured boot on Windows-based desktop motherboards. IC Role / Device Role / Timing Role: Root-of-trust anchor providing PCR extension, sealed key storage, and attestation signing via LPC interface. Use Value: Ensures firmware integrity verification before OS load and protects encrypted volume keys from offline attacks. |
Use Scenario: Securing firmware updates and runtime authentication in programmable logic controllers (PLCs) operating in harsh environments. IC Role / Device Role / Timing Role: Tamper-resistant key vault and cryptographic service provider interfaced via LPC-compatible industrial host controller. Use Value: Prevents unauthorized firmware modification and enables secure remote diagnostics with signed telemetry. |
| Thin Client Authentication | Medical Imaging Workstation |
Use Scenario: User identity binding and session credential protection in cloud-connected thin clients with minimal local storage. IC Role / Device Role / Timing Role: Hardware-backed credential store supporting TPM-bound certificates and EK-based attestation. Use Value: Enables zero-trust network access policies without exposing private keys to OS or application layers. |
Use Scenario: HIPAA-compliant audit logging and DICOM image encryption in FDA-cleared diagnostic imaging systems. IC Role / Device Role / Timing Role: Secure timestamping and digital signature generation for medical records using internal RNG and RSA engine. Use Value: Meets regulatory requirements for non-repudiation and data integrity in patient-critical applications. |
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 SLB9665TT2.0 | Supports TPM 2.0, higher RSA throughput (2048-bit in ~120ms), SPI/LPC dual interface; larger 6×6mm QFN-48 package. | Required for Windows 11 compliance and UEFI Secure Boot v2; not backward-compatible with TPM 1.2-only BIOS. | Select if upgrading to TPM 2.0 ecosystem; verify LPC pin mapping and CLKRUN#/SERIRQ timing alignment. |
| Nuvoton NPCT750KB0GX | TPM 1.2 compliant, same 40-pin QFN footprint, but uses different GPIO naming (GPIO0–GPIO3) and lacks SB3V standby rail. | Lower cost alternative for commercial-grade desktops where standby power retention is not required. | Use only where industrial temperature range and SB3V persistence are non-critical; validate BIOS driver compatibility. |
Compared with AT97SC3204-X2A16-00, the SLB9665TT2.0 enables future-proof TPM 2.0 deployment but requires firmware and BIOS changes, while the NPCT750KB0GX offers footprint compatibility at the expense of standby power capability and industrial temperature rating.
Availability
AT97SC3204-X2A16-00 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial PC manufacturing, and medical imaging system integration requiring stable component supply, long-term lifecycle support, and RoHS-compliant industrial-grade security ICs.
Supply support for AT97SC3204-X2A16-00 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 legacy Atmel security ICs including the AT97SC3204 series.
The AT97SC3204 belongs to Atmel's Trusted Platform Module product line, designed specifically to deliver certified hardware root-of-trust for PC client platforms and embedded systems requiring TCG-compliant secure boot and data protection.
FAQ
What is the primary interface protocol supported by the AT97SC3204-X2A16-00?
The AT97SC3204-X2A16-00 uses the Low Pin Count (LPC) bus interface compliant with TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. It supports LAD[3:0], LFRAME#, SERIRQ, CLKRUN#, and LPCPD# signals for full host communication, interrupt handling, and power management - no additional protocol translation or bridge IC is required for standard BIOS integration.
Does the AT97SC3204-X2A16-00 support both commercial and industrial temperature ranges?
Yes, the AT97SC3204-X2A16-00 is qualified for industrial operation from −40°C to +85°C, as confirmed in the Atmel ordering information and datasheet addendum. This makes the AT97SC3204-X2A16-00 suitable for deployment in ruggedized client devices, factory automation controllers, and medical equipment where extended thermal stability is required.
How much non-volatile user storage does the AT97SC3204-X2A16-00 provide?
The AT97SC3204-X2A16-00 provides 1756 bytes of NV user-defined data storage, separate from its internal EEPROM reserved for RSA keys and TCG platform configuration registers (PCRs). This space is accessible via standard TPM commands (e.g., TPM_NV_Write, TPM_NV_Read) and persists across power cycles and system resets.
Is the AT97SC3204-X2A16-00 compatible with Windows BitLocker and Linux tpm-tools?
Yes, the AT97SC3204-X2A16-00 is fully compliant with TCG TPM 1.2 and TIS 1.2 specifications, enabling native support in Windows BitLocker (via tpm.msc and manage-bde) and Linux distributions using tpm-tools or trousers stack. Its LPC interface and command set are validated against Microsoft and Linux Foundation TPM reference implementations.
What is the function of the SB3V pin on the AT97SC3204-X2A16-00?
The SB3V pin on the AT97SC3204-X2A16-00 supplies standby 3.3V power to maintain internal state, NV storage contents, and real-time clock-like functionality during system suspend (S3/S4) states. Unlike VCC, SB3V must remain active when main power is removed - ensuring TPM integrity and sealed key persistence across sleep/resume cycles.
AT97SC3204-X2A16-00 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-X2A16-00 FAQ
1.How can I place an order for AT97SC3204-X2A16-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-X2A16-00 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-X2A16-00 reliable?
The price and inventory of AT97SC3204-X2A16-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-X2A16-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-X2A16-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-X2A16-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-X2A16-00?
AT97SC3204-X2A16-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-X2A16-00 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-X2A16-00?
For technical support, including AT97SC3204-X2A16-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-X2A16-00 requirements.
6.How does Aetrix verify that AT97SC3204-X2A16-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-X2A16-00 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-X2A16-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-X2A16-00?
All AT97SC3204-X2A16-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-X2A16-00, 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-X2A16-00 part is unused and in its original packaging.
Return procedure for AT97SC3204-X2A16-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-X2A16-00 Tags
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