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Microchip Technology AT97SC3204T-U1A180
- Part No.:
- AT97SC3204T-U1A180
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204T-U1A180.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,280
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Product details
Overview
AT97SC3204T-U1A180 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-accelerated 2048-bit RSA signing (200ms), SHA-1 hashing (20µs/64B), and FIPS 140-2–compliant RNG. It integrates an AVR RISC CPU, internal EEPROM for key storage, and interfaces via 33MHz LPC bus with SIRQ and CLKRUN support. Used in PC motherboard Trusted Platform Modules for secure boot and attestation.
For engineers reviewing the AT97SC3204T-U1A180 datasheet, AT97SC3204T-U1A180 pinout, AT97SC3204T-U1A180 application, or AT97SC3204T-U1A180 equivalent, this page delivers verified package mapping (28-pin Thin TSSOP), confirmed LPC interface timing, validated GPIO6 and SERIRQ terminal roles, and real-world OEM integration context for BIOS-level TPM deployment.
Technical Context
The AT97SC3204T-U1A180 implements the full TCG PC Client Specific TPM Interface Specification v1.2, including command/response framing, locality management, and physical presence assertion logic. Its cryptographic engine executes RSA private-key operations in hardware without software intervention, while the integrated RNG feeds both key generation and TCG protocol entropy requirements.
Communication occurs over a synchronous 33MHz LPC bus with dedicated LAD[0:3], LFRAME#, LCLK, and CLKRUN# signals enabling clock gating for power-constrained mobile platforms. The device supports SIRQ-based interrupt signaling and uses SB3V for standby voltage retention during low-power states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TPM Standard | TCG TPM Specification v1.2 – enables interoperability with Windows BitLocker, Linux tpm-tools, and UEFI Secure Boot stacks |
| RSA Signature Speed | 2048-bit private key operation in ≤200ms – meets TCG latency requirement for platform authentication handshake |
| LPC Bus Speed | 33MHz synchronous interface – matches standard PC chipset LPC timing, eliminating need for bridge logic |
| Random Number Generator | FIPS 140-2–certified hardware RNG – provides cryptographically secure entropy for key derivation and nonce generation |
| Nonvolatile Storage | 1280 bytes user NV space + dedicated RSA key EEPROM – persists credentials across reboots without host OS dependency |
| Supply Voltage | 3.3V main supply (VCC) + 3.3V standby (SB3V) – supports always-on TPM functionality during S3/S4 sleep states |
| Operating Temperature | −40°C to +85°C industrial grade – qualified for embedded systems outside desktop PC thermal envelope |
Pinout & Package
AT97SC3204T-U1A180 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm, 0.65 mm pitch), RoHS-compliant and lead-free per JEDEC MO-153 Variation AE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 3.3V nominal supply for core logic and crypto engine; decoupling required per layout guidelines |
| SB3V | Standby voltage input | 3.3V backup rail maintaining SRAM and key state during system suspend (S3/S4) |
| LAD0–LAD3 | LPC bidirectional data/address bus | Time-multiplexed command, address, and data lines; requires pull-up resistors per LPC spec |
| LCLK | LPC clock input | 33MHz system-synchronous clock sourced from chipset; defines all timing windows |
| SERIRQ | Serialized interrupt request | Open-drain IRQ signal compatible with LPC SERIRQ protocol; used for asynchronous event notification |
| CLKRUN# | PCI clock run control | Enables dynamic clock stopping during idle; critical for mobile platform power savings |
| GPIO6 | General-purpose I/O | Configurable as input/output; used by OEMs for board-specific presence detection or status signaling |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA Accelerator | Offloads 2048-bit private-key operations from host CPU, reducing boot-time latency and preventing software-side key exposure |
| Integrated AVR RISC Core | Runs certified TPM firmware stack independently; eliminates external microcontroller and associated BOM cost |
| LPC Interface Compliance | Full support for TCG-defined LPC register map, command sequences, and error reporting – ensures BIOS driver compatibility |
| FIPS 140-2 RNG | Meets NIST validation requirements for entropy sources in cryptographic modules; required for government and enterprise deployments |
| Secure Key Storage | Dedicated EEPROM with tamper-resistant write protection prevents extraction of stored RSA keys even under physical attack |
Applications
| Desktop PC Security Module | Laptop TPM Subsystem |
|---|---|
Use Scenario: Integrated into motherboard LPC bus to enable Windows BitLocker encryption and measured boot verification. IC Role / Device Role / Timing Role: Root-of-trust anchor providing cryptographic attestation of boot firmware integrity before OS load. Use Value: Prevents unauthorized firmware modification by binding disk encryption keys to verified platform configuration registers (PCRs). | Use Scenario: Mounted on laptop baseboard to support Intel TXT and UEFI Secure Boot with runtime attestation. IC Role / Device Role / Timing Role: Hardware-enforced trust anchor managing platform identity and remote attestation responses. Use Value: Enables enterprise IT to remotely verify device health and enforce compliance policies before granting network access. |
| Industrial Control System HSM | Embedded Gateway Authentication |
Use Scenario: Deployed in PLC or HMIs requiring secure firmware update signing and device identity binding. IC Role / Device Role / Timing Role: Standalone hardware security module performing asymmetric signature verification and key storage. Use Value: Ensures only signed firmware images execute, mitigating supply-chain compromise in long-lifecycle industrial equipment. | Use Scenario: Embedded in smart gateway for IoT edge devices to authenticate cloud connections and sign telemetry. IC Role / Device Role / Timing Role: Cryptographic identity provider generating ECDSA signatures and managing certificate lifecycles. Use Value: Eliminates need for cloud-based key management by securely storing root credentials on-device with hardware isolation. |
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 | TCG 2.0 compliant; supports ECC and SHA-256; 40-pin QFN only; no AVR core (separate firmware execution) | Required for Windows 11 readiness and modern UEFI implementations; not backward-compatible with legacy TPM 1.2 BIOS | Select when upgrading to TCG 2.0 mandates or requiring elliptic-curve cryptography for smaller key sizes and faster signing |
| Nuvoton NPCT650KB0DX | TPM 1.2 compliant; same 28-pin TSSOP footprint; lower RSA speed (2048-bit in 300ms); no FIPS 140-2 RNG certification | Cost-optimized alternative for non-FIPS environments where full entropy certification is not mandated | Select for commercial-grade desktops where TCG 1.2 compliance suffices and FIPS validation is not contractually required |
Compared with SLB9665TT2.0 and NPCT650KB0DX, the AT97SC3204T-U1A180 offers verified FIPS 140-2 RNG certification and 200ms RSA signing within a mature, BIOS-integrated 1.2 stack-making it optimal for legacy platform continuity and regulated deployments where TCG 2.0 migration is not yet scheduled.
Availability
AT97SC3204T-U1A180 is available at Aetrix Electronics and suitable for desktop motherboards, industrial HMIs, embedded gateways, and laptop baseboards requiring stable component supply and long-term lifecycle support.
Supply support for AT97SC3204T-U1A180 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
Atmel Corporation, now part of Microchip Technology, designs secure microcontrollers and trusted computing solutions for embedded systems, with deep expertise in hardware-based security IP.
The AT97SC3204 product line delivers turnkey TPM 1.2 modules targeting PC OEMs and industrial system integrators needing certified, pre-validated root-of-trust silicon with minimal firmware integration effort.
FAQ
What is the primary security function of the AT97SC3204T-U1A180?
The AT97SC3204T-U1A180 serves as a hardware-rooted Trusted Platform Module implementing TCG TPM 1.2. Its core function is to generate, store, and use cryptographic keys to ensure platform integrity-enabling secure boot, disk encryption binding, and remote attestation. The AT97SC3204T-U1A180 performs these operations using isolated hardware, preventing software-based key extraction or firmware tampering.
Does the AT97SC3204T-U1A180 support TCG 2.0 or only TPM 1.2?
The AT97SC3204T-U1A180 is strictly compliant with TCG TPM Specification Version 1.2 and does not support TPM 2.0 features such as ECC algorithms, SHA-256, or hierarchical key structures. It lacks the architectural changes required for 2.0 compliance. For new designs requiring Windows 11 readiness or modern UEFI security stacks, a TPM 2.0 device like the Infineon SLB9665TT2.0 must be selected instead of the AT97SC3204T-U1A180.
What is the role of the SB3V pin on the AT97SC3204T-U1A180?
The SB3V pin supplies standby voltage to maintain internal SRAM state and cryptographic key context during system suspend (S3/S4). This allows the AT97SC3204T-U1A180 to retain its operational state-including PCR values and session keys-without requiring full reinitialization upon resume. SB3V must be connected to a clean 3.3V rail independent of VCC to ensure uninterrupted security context preservation.
Can the AT97SC3204T-U1A180 be used in industrial temperature environments?
Yes, the AT97SC3204T-U1A180 is qualified for industrial temperature operation from −40°C to +85°C, as confirmed in Atmel's ordering information and package documentation. This rating applies to all supported packages (28A2, 28A3, 40ML1), making the AT97SC3204T-U1A180 suitable for deployment in factory automation controllers, transportation systems, and outdoor embedded gateways where extended thermal range is required.
How does the AT97SC3204T-U1A180 handle random number generation for cryptographic operations?
The AT97SC3204T-U1A180 incorporates a hardware True Random Number Generator (TRNG) certified to FIPS 140-2 Annex C requirements. It uses analog entropy sources and a deterministic random bit generator (DRBG) to produce cryptographically secure output consumed directly by the RSA engine and TCG protocol stack. This eliminates reliance on software-based PRNGs and ensures entropy quality meets federal and enterprise security policy mandates for the AT97SC3204T-U1A180.
AT97SC3204T-U1A180 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-U1A180 FAQ
1.How can I place an order for AT97SC3204T-U1A180 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U1A180 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-U1A180 reliable?
The price and inventory of AT97SC3204T-U1A180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-U1A180 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U1A180?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U1A180 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U1A180?
AT97SC3204T-U1A180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U1A180 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-U1A180?
For technical support, including AT97SC3204T-U1A180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U1A180 requirements.
6.How does Aetrix verify that AT97SC3204T-U1A180 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U1A180 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-U1A180 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U1A180?
All AT97SC3204T-U1A180 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U1A180, 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-U1A180 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U1A180:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-U1A180 Tags
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