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Microchip Technology AT97SC3204-U1A190
- Part No.:
- AT97SC3204-U1A190
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-U1A190.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,123
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Product details
Overview
AT97SC3204-U1A190 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-based RSA-2048 signing (200ms), SHA-1 acceleration (20µs/64B block), and FIPS 140-2–compliant RNG. It integrates an AVR RISC CPU, internal EEPROM for key storage, and communicates via 33MHz LPC bus with SIRQ and CLKRUN support for power-managed PC platforms.
For engineers reviewing the AT97SC3204-U1A190 datasheet, AT97SC3204-U1A190 pinout, AT97SC3204-U1A190 application, or AT97SC3204-U1A190 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 trusted boot and platform attestation.
Technical Context
The AT97SC3204-U1A190 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-2048 signatures in 200ms and SHA-1 hashing at 20µs per 64-byte block, with dedicated SRAM and EEPROM for key caching and NV user data (1280 bytes).
It uses a 33MHz LPC bus with LAD[0:3], LFRAME#, LCLK, and CLKRUN# to interface directly with host chipset southbridge, supporting clock gating and interrupt-driven operation via SERIRQ. The device includes on-die physical security circuitry and dynamic memory management for transparent key loading and flushing without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TPM Standard | TCG TPM Specification v1.2 - enables certified platform integrity measurement and attestation in Windows BitLocker and Linux tpm-tools environments |
| RSA Signature Speed | 2048-bit RSA sign in 200ms - meets TCG latency requirements for secure boot key validation and remote attestation |
| SHA-1 Throughput | 20µs per 64-byte block - supports high-frequency PCR extension during OS boot and runtime integrity checks |
| LPC Bus Speed | 33MHz - matches standard Intel/AMD southbridge LPC timing, eliminating need for clock dividers or glue logic |
| NV User Storage | 1280 bytes - sufficient for storing platform-specific credentials, sealed keys, or policy hashes without external EEPROM |
| Operating Voltage | 3.3V ±5% - compatible with standard LPC I/O voltage domains and eliminates level-shifting components |
| Temperature Range | -40°C to +85°C - qualified for industrial embedded systems and mobile computing thermal profiles |
Pinout & Package
AT97SC3204-U1A190 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm, 0.65 mm pitch), RoHS-compliant and lead-free. Pin functions are defined per JEDEC MO-153 Variation AE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply input | Power domain for core logic, crypto engine, and LPC interface; requires local 100nF decoupling |
| SB3V | Standby 3.3V supply | Maintains RTC and key state during S3/S4 sleep; must be supplied independently of VCC |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data bus; supports burst transfers and error detection per LPC spec |
| LCLK | 33MHz LPC clock input | Driven by host chipset; no internal PLL - simplifies clock tree design and reduces jitter sensitivity |
| SERIRQ | Serialized interrupt request | Open-drain signal shared across LPC devices; enables low-latency event notification without dedicated IRQ line |
| CLKRUN# | LPC clock run control | Allows host to gate LCLK during idle periods - critical for battery life in laptops and tablets |
| GPIO6 | General-purpose I/O | Configurable as input/output; used for platform-specific presence detection or firmware debug signaling |
| LRESET# | PCI/LPC reset input | Active-low asynchronous reset synchronized to LCLK - ensures deterministic state recovery after warm reboot |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Asymmetric Crypto Engine | Offloads RSA-2048 signing and key generation from host CPU - reduces boot time and prevents software-side side-channel leakage |
| FIPS 140-2 Compliant RNG | Provides cryptographically secure entropy for key derivation and protocol nonces - satisfies NIST SP 800-90A requirements for TPM applications |
| Internal EEPROM Key Storage | Stores multiple RSA key pairs with hardware-enforced access control - eliminates need for external secure memory and associated bus exposure |
| LPC Interface Compliance | Full implementation of TCG PC Client LPC interface spec - enables plug-and-play integration with standard BIOS/UEFI firmware stacks |
| Dynamic Key Cache Management | Automatically loads/unloads keys based on TPM_FlushSpecific and TPM_LoadKey2 commands - removes host driver complexity for key lifecycle handling |
Applications
| Secure Boot Validation | Platform Remote Attestation |
|---|---|
Use Scenario: Verifying signed bootloader and kernel images during system power-on sequence before execution. IC Role / Device Role / Timing Role: TPM root-of-trust executing PCR extension and signature verification using internally stored endorsement key. Use Value: Prevents unauthorized firmware modification by binding boot measurements to hardware-bound keys stored in AT97SC3204-U1A190 EEPROM. | Use Scenario: Responding to remote challenge requests from enterprise management servers to prove platform integrity. IC Role / Device Role / Timing Role: TPM performing quote operation with SHA-1 hash of PCRs and signing result with AIK stored in AT97SC3204-U1A190. Use Value: Enables zero-touch provisioning and compliance auditing using AT97SC3204-U1A190's 200ms RSA-2048 signing capability and FIPS RNG. |
| BIOS Firmware Sealing | Hardware-Bound Credential Storage |
Use Scenario: Encrypting disk encryption keys so they only decrypt when BIOS configuration matches pre-recorded PCR values. IC Role / Device Role / Timing Role: AT97SC3204-U1A190 acting as unsealing authority using PCR-bound policies and internal AES-encrypted NV storage. Use Value: Ensures BitLocker or LUKS keys remain inaccessible if BIOS settings are tampered with - enforced by AT97SC3204-U1A190's hardware policy engine. | Use Scenario: Storing user authentication tokens, certificate private keys, or license entitlements resistant to extraction. IC Role / Device Role / Timing Role: Secure vault providing tamper-resistant storage with hardware access control gates managed by AT97SC3204-U1A190 firmware. Use Value: Protects 1280 bytes of NV user data using AT97SC3204-U1A190's physical security circuitry and write-lock mechanisms. |
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 | TPM 2.0 compliant; supports ECC and SHA-256; 40-pin QFN only; no AVR CPU core | Required for Windows 11 certification; lacks legacy BIOS compatibility in older platforms | Select when upgrading to TPM 2.0 mandates or requiring SHA-256 attestation; not drop-in for AT97SC3204-U1A190 LPC timing or firmware API |
| Nuvoton NPCT650KBAX | TPM 1.2 compliant; same 28-pin TSSOP footprint; integrated 8051 core; lower RSA-2048 speed (250ms) | Compatible with existing LPC layouts but requires updated driver stack due to different register map | Choose for cost-sensitive industrial designs where AT97SC3204-U1A190's 200ms signing speed is noncritical and 8051 toolchain familiarity exists |
Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT650KBAX, the AT97SC3204-U1A190 offers optimal balance of TPM 1.2 compliance, 200ms RSA-2048 performance, and direct LPC integration for legacy BIOS platforms - making it the preferred choice for OEMs maintaining Windows 7/8.1 compatibility and minimizing firmware porting effort.
Availability
AT97SC3204-U1A190 is available at Aetrix Electronics and suitable for secure boot validation, platform remote attestation, and BIOS firmware sealing requiring stable component supply across industrial and commercial temperature ranges.
Supply support for AT97SC3204-U1A190 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-U1A190 belongs to Atmel's PC Security product line, designed specifically to deliver certified, single-chip TPM 1.2 functionality for OEM motherboard and notebook manufacturers integrating hardware-rooted trust.
FAQ
What is the primary function of the AT97SC3204-U1A190 in a PC platform?
The AT97SC3204-U1A190 serves as a Trusted Platform Module (TPM) v1.2 security co-processor that provides hardware-based cryptographic services including RSA-2048 signing, SHA-1 hashing, and secure key storage. It enables secure boot validation, platform attestation, and firmware sealing by acting as the root of trust anchored in silicon. Its LPC interface allows direct integration into standard PC motherboards without additional bridge logic.
Does the AT97SC3204-U1A190 support both commercial and industrial temperature ranges?
Yes, the AT97SC3204-U1A190 is qualified for operation across -40°C to +85°C (industrial grade) and 0°C to +70°C (commercial grade). This dual qualification makes it suitable for deployment in ruggedized embedded PCs, point-of-sale terminals, and industrial control systems where extended thermal stability is required alongside standard desktop/laptop use cases.
What package type is used for the AT97SC3204-U1A190?
The AT97SC3204-U1A190 is supplied in a 28-lead Thin TSSOP package (4.4 mm × 9.7 mm body, 0.65 mm pitch), compliant with JEDEC MO-153 Variation AE. This compact, surface-mount package supports high-density PCB layouts and is RoHS-compliant with lead-free terminations, matching common reflow profiles used in modern SMT assembly lines.
How does the AT97SC3204-U1A190 handle random number generation for cryptographic operations?
The AT97SC3204-U1A190 incorporates a FIPS 140-2–compliant True Random Number Generator (RNG) using analog entropy sources and a certified pseudo-random number generator. It supplies cryptographically secure randomness directly to the hardware crypto engine for RSA key generation and TCG protocol nonces, eliminating reliance on software-based PRNGs vulnerable to prediction or seeding flaws.
Can the AT97SC3204-U1A190 be used as a direct replacement for other TPM 1.2 modules?
The AT97SC3204-U1A190 is not a pin-compatible or drop-in replacement for other TPM modules due to unique pin assignments (e.g., SB3V, GPIO6, ATest) and proprietary firmware architecture. While functionally comparable to other TPM 1.2 devices like the Nuvoton NPCT650KBAX, successful substitution requires validation of LPC timing margins, BIOS driver compatibility, and firmware update procedures specific to AT97SC3204-U1A190.
AT97SC3204-U1A190 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-U1A190 FAQ
1.How can I place an order for AT97SC3204-U1A190 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-U1A190 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-U1A190 reliable?
The price and inventory of AT97SC3204-U1A190 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-U1A190 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-U1A190?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-U1A190 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-U1A190?
AT97SC3204-U1A190 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-U1A190 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-U1A190?
For technical support, including AT97SC3204-U1A190 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-U1A190 requirements.
6.How does Aetrix verify that AT97SC3204-U1A190 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-U1A190 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-U1A190 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-U1A190?
All AT97SC3204-U1A190 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-U1A190, 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-U1A190 part is unused and in its original packaging.
Return procedure for AT97SC3204-U1A190:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-U1A190 Tags
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CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
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SLB9672XU20FW1523XTMA1
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SLB9673XU20FW2613XTMA1
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CYPD3125-40LQXIT
Infineon Technologies
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AT97SC3204-U2A1A-20
Microchip Technology
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AT97SC3204-U2A1A-10
Microchip Technology
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SLM9670AQ20FW1311XTMA1
Infineon Technologies
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SLB9672XU20FW1613XTMA1
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SLB9672AU20FW1613XTMA1
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SLB9673AU20FW2613XTMA1
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