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Microchip Technology AT97SC3204T-U1A80
- Part No.:
- AT97SC3204T-U1A80
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
AT97SC3204T-U1A80.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,363
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Product details
Overview
AT97SC3204T-U1A80 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-based RSA-2048 signing (200ms), SHA-1 acceleration (20µs/64-byte block), and FIPS 140-2–compliant RNG. It integrates an AVR RISC CPU, internal EEPROM for key storage, and 1280-byte user NV space. Designed for PC platform root-of-trust in OEM motherboard designs.
For engineers reviewing the AT97SC3204T-U1A80 datasheet, AT97SC3204T-U1A80 pinout, AT97SC3204T-U1A80 application, or AT97SC3204T-U1A80 equivalent, key selection criteria include LPC bus timing compliance, industrial temperature support (−40°C to +85°C), secure firmware boot integrity, and TCG PC Client 1.2 interface conformance.
Technical Context
The AT97SC3204T-U1A80 implements the full TCG TPM 1.2 stack in silicon, including cryptographic primitives (RSA-2048, SHA-1), secure key management via internal EEPROM, and dynamic key caching without host intervention. Its LPC interface operates at 33 MHz with CLKRUN# and SIRQ support for power-aware mobile platforms.
Physical security includes tamper-resistant layout, secure boot ROM, and hardware-enforced access control to NV storage. The integrated FIPS 140-2–validated RNG feeds both TCG protocol operations and system-level random number requests via SERIRQ and LPC data channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TPM Standard | TCG TPM Specification Version 1.2, PC Client Specific Interface v1.2 compliant |
| RSA Signature Speed | 2048-bit RSA signature in 200ms; enables fast attestation and platform authentication |
| SHA-1 Throughput | 20 µs per 64-byte block; supports efficient hash chaining for PCR extension |
| LPC Interface | 33 MHz Low Pin Count bus with LFRAME#, LAD[0:3], CLKRUN#, and SERIRQ signals |
| Operating Temp | −40°C to +85°C industrial grade; qualified for embedded motherboard and server board deployment |
| Supply Voltage | 3.3 V ±10%; compatible with standard PC platform power rails |
| NV Storage | 1280 bytes user-defined non-volatile storage; persists across power cycles for policy or credential data |
Pinout & Package
AT97SC3204T-U1A80 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm, 0.65 mm pitch) per JEDEC MO-153 Variation AE. Pin functions are defined for LPC interface, power, reset, and GPIO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary Power Supply | 3.3 V main supply input; decoupling required per TSSOP layout guidelines |
| SB3V | Standby Power Rail | 3.3 V standby supply for persistent state retention during S3/S4 sleep states |
| LRESET# | Asynchronous Reset Input | Active-low hardware reset signal synchronized to LPC clock domain |
| LAD0–LAD3 | LPC Data/Address Bus | 4-bit bidirectional multiplexed command/address/data lines; time-multiplexed per LPC spec |
| LCLK | LPC Clock Input | 33 MHz system clock input; defines timing for all LPC transactions |
| LFRAME# | LPC Frame Strobe | Active-low start-of-transaction signal; initiates LPC cycle handshake |
| CLKRUN# | PCI Clock Run Control | Enables/disables LPC clock during low-power states; supports dynamic clock gating |
| SERIRQ | Serialized Interrupt Request | Open-drain interrupt output supporting shared IRQ line on LPC bus |
| GPIO6 | General Purpose I/O | Configurable digital I/O pin; usable for platform-specific status signaling or debug |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Crypto Engine | Dedicated RSA-2048 and SHA-1 accelerators offload CPU and prevent software-side timing attacks |
| FIPS 140-2 RNG | On-die true random number generator validated to FIPS 140-2 Level 2; used for key generation and protocol randomness |
| Internal Key Storage | EEPROM-based secure storage for multiple RSA keys; managed autonomously without host driver intervention |
| LPC Power Management | CLKRUN# and SIRQ support enable full LPC interface suspend/resume in mobile and server platforms |
| Secure Firmware Boot | ROM-based boot loader validates signed firmware image before execution; prevents unauthorized code injection |
Applications
| Desktop Motherboard Security | Industrial Embedded Control |
|---|---|
Use Scenario: Integration into x86-based desktop motherboards as the root-of-trust for BitLocker, Secure Boot, and measured boot. IC Role / Device Role / Timing Role: TPM 1.2 security co-processor handling cryptographic operations, PCR extension, and sealed storage. Use Value: Enables hardware-backed attestation and encrypted disk unlock without exposing keys to OS or firmware. | Use Scenario: Deployment in ruggedized industrial HMIs and PLC controllers requiring secure firmware update verification. IC Role / Device Role / Timing Role: Trusted execution anchor providing secure boot validation and runtime integrity measurement. Use Value: Prevents unauthorized firmware modification and ensures only signed updates execute under industrial temperature conditions. |
| Server Platform Integrity | Thin Client Authentication |
Use Scenario: Mounted on server baseboard management controllers (BMC) to support remote attestation and key sealing. IC Role / Device Role / Timing Role: Hardware-enforced trust anchor interfacing with BMC over LPC for out-of-band security services. Use Value: Enables confidential VM launch and hardware-rooted identity binding for cloud infrastructure. | Use Scenario: Embedded in enterprise thin clients to enforce zero-trust network access policies via certificate-based authentication. IC Role / Device Role / Timing Role: Identity provisioning and credential storage device supporting PKI enrollment and TLS client auth. Use Value: Stores private keys in tamper-resistant hardware, preventing credential theft during endpoint compromise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665TT2.0 | TPM 2.0 compliant; supports ECC and SHA-256; requires different LPC initialization sequence | Required for Windows 11 compliance; not backward-compatible with legacy TPM 1.2 BIOS stacks | Select when upgrading to modern OS security requirements and new platform designs |
| Nuvoton NPCT650KB0DX | TPM 1.2 compliant; same LPC interface; lower max operating temp (0°C to 70°C); no industrial grade option | Suitable for commercial desktops but not extended-temperature industrial deployments | Select when cost sensitivity outweighs industrial temp need and existing BIOS supports alternate vendor |
Compared with SLB9665TT2.0 and NPCT650KB0DX, the AT97SC3204T-U1A80 uniquely delivers industrial temperature support alongside full TCG PC Client 1.2 compliance in a single-chip turnkey solution-making it optimal for legacy-platform continuity and harsh-environment OEM integration where TPM 2.0 migration is not yet feasible.
Availability
AT97SC3204T-U1A80 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial HMI security, server BMC integration, and thin client authentication requiring stable component supply and long-term lifecycle assurance.
Supply support for AT97SC3204T-U1A80 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) is a semiconductor manufacturer specializing in microcontrollers, security ICs, and touch solutions for embedded systems.
The AT97SC3204 product line delivers certified TPM 1.2 functionality in compact packages for PC and embedded platforms, targeting OEMs needing hardware-rooted trust without firmware development overhead.
FAQ
What is the primary security certification compliance of the AT97SC3204T-U1A80?
The AT97SC3204T-U1A80 is fully compliant with Trusted Computing Group (TCG) TPM Specification Version 1.2 and the TCG PC Client Specific TPM Interface Specification Version 1.2. It implements all mandatory commands and protocols defined in those specifications. The on-die RNG is FIPS 140-2 compliant, and the device supports secure key generation, storage, and cryptographic operations required for platform attestation. AT97SC3204T-U1A80 does not claim TPM 2.0 or Common Criteria EAL4+ certification.
Does the AT97SC3204T-U1A80 support industrial temperature operation?
Yes, the AT97SC3204T-U1A80 is qualified for industrial temperature range operation from −40°C to +85°C. This rating is explicitly confirmed in the official Atmel ordering information and datasheet addendum. The device uses thermal-aware circuit design and packaging (28A2 Thin TSSOP) to maintain TCG-compliant timing and cryptographic integrity across this full range. AT97SC3204T-U1A80 is commonly selected for industrial HMIs, server baseboards, and embedded controllers where ambient temperature exceeds commercial limits.
What package type is used by the AT97SC3204T-U1A80?
The AT97SC3204T-U1A80 uses a 28-lead Thin Shrink Small Outline Package (Thin TSSOP) with dimensions 4.4 mm × 9.7 mm and 0.65 mm lead pitch, designated as package code 28A2 per JEDEC MO-153 Variation AE. This package is lead-free and RoHS compliant. While the AT97SC3204 family also offers 28A3 (standard TSSOP) and 40ML1 (QFN) variants, the U1A80 suffix specifically denotes the 28A2 industrial-grade Thin TSSOP configuration.
How does the AT97SC3204T-U1A80 handle power management in low-power systems?
The AT97SC3204T-U1A80 supports advanced power management via dedicated LPC signals: CLKRUN# allows the host to gate the 33 MHz LPC clock during S3/S4 sleep states, and SERIRQ provides serialized interrupt capability to avoid dedicated IRQ lines. SB3V supplies standby power to retain volatile state while main VCC is off. These features enable full LPC interface suspend/resume without firmware reinitialization. AT97SC3204T-U1A80 maintains secure context across low-power transitions, critical for mobile and always-on embedded platforms.
What is the role of the GPIO6 pin on the AT97SC3204T-U1A80?
GPIO6 on the AT97SC3204T-U1A80 is a general-purpose input/output pin configurable via firmware to serve platform-specific functions such as status indication, debug signaling, or hardware handshake with companion controllers. Unlike dedicated LPC or crypto pins, GPIO6 is not involved in core TPM protocol execution but provides flexibility for OEM customization. Its electrical characteristics match 3.3 V CMOS levels, and it is not internally pulled up or down. AT97SC3204T-U1A80 documentation confirms GPIO6 remains functional across both commercial and industrial temperature grades.
AT97SC3204T-U1A80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.240", 6.10mm 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-U1A80 FAQ
1.How can I place an order for AT97SC3204T-U1A80 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U1A80 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-U1A80 reliable?
The price and inventory of AT97SC3204T-U1A80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-U1A80 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U1A80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U1A80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U1A80?
AT97SC3204T-U1A80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U1A80 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-U1A80?
For technical support, including AT97SC3204T-U1A80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U1A80 requirements.
6.How does Aetrix verify that AT97SC3204T-U1A80 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U1A80 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-U1A80 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U1A80?
All AT97SC3204T-U1A80 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U1A80, 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-U1A80 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U1A80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-U1A80 Tags
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