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Microchip Technology AT97SC3204-X2A1A-20
- Part No.:
- AT97SC3204-X2A1A-20
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-X2A1A-20.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,554
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Product details
Overview
AT97SC3204-X2A1A-20 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 for secure boot and platform authentication in PCs and embedded systems.
For engineers reviewing the AT97SC3204-X2A1A-20 datasheet, AT97SC3204-X2A1A-20 pinout, AT97SC3204-X2A1A-20 application, or AT97SC3204-X2A1A-20 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options aligned with OEM security module integration requirements.
Technical Context
The AT97SC3204-X2A1A-20 implements a full TCG TPM 1.2 stack in silicon, including dedicated cryptographic acceleration for RSA-2048 (200ms sign), SHA-1 (20μs/64B block), and key management via internal EEPROM. Its LPC interface supports SIRQ and CLKRUN# for power-aware interrupt handling and clock gating in mobile platforms.
Security architecture includes physical tamper resistance, dynamic internal key cache management (no host intervention required for TPM_FlushSpecific/TPM_LoadKey2), and GPIO-Express-00 for platform-specific control signaling. Firmware is factory-integrated, eliminating external flash dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client TIS 1.2 - enables certified secure boot and attestation in Windows/Linux enterprise environments. |
| RSA Performance | 2048-bit RSA signature in 200ms - meets TCG latency requirements for platform integrity verification during POST. |
| RNG Certification | FIPS 140-2–compliant hardware RNG - provides cryptographically secure entropy for key generation and protocol nonces. |
| LPC Interface | 33MHz Low Pin Count bus with LAD[0:3], LFRAME#, LCLK, SERIRQ, CLKRUN# - direct drop-in replacement for legacy LPC-based TPM slots on motherboard designs. |
| Supply Voltage | 3.3V ±5% with SB3V standby rail - compatible with standard PC voltage rails and supports low-power suspend states. |
| Operating Temperature | −40°C to +85°C industrial grade - qualified for extended-temperature deployment in ruggedized embedded and server platforms. |
| NV Storage | 1756 bytes of user-defined non-volatile storage - sufficient for storing platform configuration hashes, certificates, or custom policy data. |
Pinout & Package
AT97SC3204-X2A1A-20 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch, VQFN), RoHS-compliant and lead-free. Pinout matches the 40ML1 variant per Atmel-5295ES datasheet summary.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply input | Primary power rail for core logic and crypto engine; requires local 100nF decoupling. |
| SB3V | Standby 3.3V supply input | Independent rail powering retention circuits during S3/S4 sleep states; enables persistent key cache. |
| LAD0–LAD3 | LPC bidirectional data/address/command lines | Time-multiplexed 4-bit bus carrying TCG commands, responses, and status - no external level-shifting needed. |
| LFRAME# | LPC frame strobe input | Active-low signal indicating start/end of LPC transaction cycle; synchronizes command framing with host BIOS. |
| SERIRQ | Serialized interrupt request I/O | Open-drain shared interrupt line supporting IRQ routing over LPC - eliminates dedicated INT# pin routing. |
| CLKRUN# | LPC clock run control I/O | Enables dynamic clock gating during idle periods to reduce platform power consumption in mobile designs. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per TCG spec - usable for platform-specific enable/disable or status signaling. |
| LRESET# | PCI reset input (active low) | Hardware reset trigger synchronized to LPC bus timing - ensures deterministic TPM state recovery after warm reboot. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip turnkey TPM solution | Firmware pre-integrated and factory-validated - eliminates external flash, bootloader development, and firmware update infrastructure. |
| Hardware asymmetric crypto engine | Dedicated RSA accelerator offloads CPU during attestation - reduces boot time impact and prevents software-side timing attacks. |
| Internal EEPROM for RSA keys | Secure key storage isolated from main memory - prevents extraction via DMA or cold-boot attacks; supports key sealing/unsealing. |
| TCG-compliant LPC interface | Native support for SIRQ and CLKRUN# - enables seamless integration into existing PC motherboard layouts without bridge logic or glue components. |
| FIPS 140-2 RNG | On-die entropy source certified for cryptographic key derivation - satisfies NIST SP 800-90A requirements without external entropy injection. |
Applications
| Desktop PC Security Module | Server Platform Integrity |
|---|---|
|
Use Scenario: Integrated into motherboard LPC bus to provide hardware-rooted trust for Windows BitLocker and Secure Boot validation. IC Role / Device Role / Timing Role: TPM 1.2 authenticator performing PCR extension, key sealing, and remote attestation during UEFI POST and OS load. Use Value: Enables measured boot chain with immutable root-of-trust; prevents unauthorized firmware or bootloader modifications. |
Use Scenario: Mounted on rack-server baseboard management controller (BMC) to verify firmware integrity before host CPU initialization. IC Role / Device Role / Timing Role: Standalone security co-processor executing TCG Server Specific TPM Profile commands under BMC control. Use Value: Provides hardware-enforced firmware attestation independent of host OS - critical for zero-trust datacenter compliance. |
| Industrial Embedded HSM | Thin Client Authentication |
|
Use Scenario: Embedded in medical imaging or industrial gateway devices requiring HIPAA/FDA-compliant device identity and data encryption keys. IC Role / Device Role / Timing Role: Hardware security module managing certificate enrollment, TLS key generation, and secure NV storage of audit logs. Use Value: Meets regulatory requirements for cryptographic key isolation and tamper-evident storage without software-only key management risks. |
Use Scenario: Used in cloud-connected thin clients to authenticate against Azure AD or Okta via TPM-backed certificate-based login. IC Role / Device Role / Timing Role: Identity anchor providing EK-certified attestation and credential binding for passwordless authentication flows. Use Value: Eliminates reliance on soft tokens or cloud-stored credentials - enables phishing-resistant, FIDO2-aligned user identity. |
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 LPC interface, TCG 1.2 compliant, but uses ARM-based core and separate OTP for EK; no AVR microcontroller. | Requires different driver stack and lacks GPIO-Express-00; supports same BIOS-level integration but differs in firmware update mechanism. | Preferred where ARM ecosystem tooling and Infineon's OPTIGA™ support are already established. |
| NXP PCF5122A | TPM 2.0 compliant (not 1.2), higher RSA-3072 performance, but requires updated BIOS and OS support; different LPC register map. | Not backward-compatible with legacy TPM 1.2 deployments; mandates platform-level migration to TCG 2.0 stack and policy model. | Select only when upgrading to TPM 2.0 is part of the system roadmap and BIOS vendor confirms full compatibility. |
Compared with SLB9665TT2.0 and PCF5122A, the AT97SC3204-X2A1A-20 offers proven TCG 1.2 interoperability with legacy BIOS implementations, integrated AVR firmware execution, and GPIO-Express-00 flexibility - making it optimal for cost-sensitive, long-lifecycle industrial and PC OEM designs requiring drop-in TPM 1.2 compliance.
Availability
AT97SC3204-X2A1A-20 is available at Aetrix Electronics and suitable for desktop PC motherboards, server baseboard management controllers, and industrial embedded gateways requiring stable component supply, long-term lifecycle assurance, and TCG 1.2 certification readiness.
Supply support for AT97SC3204-X2A1A-20 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 family.
The AT97SC3204 series was designed as a single-chip, firmware-integrated TPM 1.2 solution targeting PC OEMs and embedded system integrators needing certified hardware root-of-trust without external memory or complex bring-up.
FAQ
What is the operating temperature range for AT97SC3204-X2A1A-20?
The AT97SC3204-X2A1A-20 is rated for industrial operation from −40°C to +85°C. This specification is confirmed in the Atmel ordering information table and package qualification data, ensuring reliable performance in extended-temperature environments such as network edge appliances and ruggedized computing platforms. The AT97SC3204-X2A1A-20 maintains full TCG 1.2 functionality across this entire range without derating.
Does AT97SC3204-X2A1A-20 support TPM 2.0?
No, the AT97SC3204-X2A1A-20 implements only TCG TPM 1.2 and PC Client TIS 1.2 specifications. It does not support TPM 2.0 algorithms, command sets, or authorization structures. For TPM 2.0 compliance, Microchip recommends evaluating newer-generation devices such as the CEC1702 or third-party alternatives like the NXP PCF5122A. The AT97SC3204-X2A1A-20 remains fully supported for legacy 1.2 deployments.
What package type is used by AT97SC3204-X2A1A-20?
The AT97SC3204-X2A1A-20 uses 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 is explicitly defined in the Atmel ordering code documentation and confirmed in the package drawing section of the datasheet summary. The X2A1A-20 suffix corresponds to this QFN variant with industrial temperature grading.
Is AT97SC3204-X2A1A-20 RoHS-compliant and lead-free?
Yes, the AT97SC3204-X2A1A-20 is RoHS-compliant and lead-free, as stated in the Atmel ordering information table under "Lead-free, RoHS" packaging notes. The 40ML1 QFN package meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements and is compatible with standard Pb-free reflow profiles used in high-volume PC motherboard assembly.
What is the function of GPIO-Express-00 on AT97SC3204-X2A1A-20?
GPIO-Express-00 on the AT97SC3204-X2A1A-20 is a configurable general-purpose I/O assigned to TPM_NV_INDEX_GPIO_00 per TCG specification. It allows platform designers to implement custom enable/disable logic, status signaling, or hardware-based policy enforcement outside the standard TPM command set. The AT97SC3204-X2A1A-20 exposes this pin directly on the 40ML1 package for board-level routing.
AT97SC3204-X2A1A-20 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-X2A1A-20 FAQ
1.How can I place an order for AT97SC3204-X2A1A-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-X2A1A-20 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-X2A1A-20 reliable?
The price and inventory of AT97SC3204-X2A1A-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-X2A1A-20 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-X2A1A-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-X2A1A-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-X2A1A-20?
AT97SC3204-X2A1A-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-X2A1A-20 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-X2A1A-20?
For technical support, including AT97SC3204-X2A1A-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-X2A1A-20 requirements.
6.How does Aetrix verify that AT97SC3204-X2A1A-20 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-X2A1A-20 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-X2A1A-20 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-X2A1A-20?
All AT97SC3204-X2A1A-20 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-X2A1A-20, 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-X2A1A-20 part is unused and in its original packaging.
Return procedure for AT97SC3204-X2A1A-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-X2A1A-20 Tags
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