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Microchip Technology AT97SC3204-U1A50
- Part No.:
- AT97SC3204-U1A50
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
AT97SC3204-U1A50.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,163
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Product details
Overview
AT97SC3204-U1A50 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-accelerated 2048-bit RSA signing (200 ms), SHA-1 acceleration (20 µs/64-byte block), and FIPS 140-2-compliant true RNG. It integrates an AVR RISC microprocessor, internal EEPROM for RSA keys, and 1280-byte NV user storage. Designed for PC platform root-of-trust, it connects via 33 MHz LPC bus with SIRQ and CLKRUN support for mobile power management.
For engineers reviewing the AT97SC3204-U1A50 datasheet, AT97SC3204-U1A50 pinout, AT97SC3204-U1A50 application, or AT97SC3204-U1A50 equivalent, key selection considerations include LPC interface timing compliance, TCG 1.2 firmware certification status, industrial temperature range (-40°C to +85°C), 28-pin Thin TSSOP package mechanical fit, and secure key lifecycle management in embedded PC and server boot-chain designs.
Technical Context
The AT97SC3204-U1A50 implements the full TCG PC Client Specific TPM Interface Specification v1.2, including command/response framing, locality support, and physical presence assertion logic. Its cryptographic engine executes RSA private-key operations and SHA-1 hashing in dedicated hardware, offloading the host CPU while maintaining side-channel resistance through physical security circuitry and dynamic memory management.
Communication occurs over a 33 MHz LPC bus with LAD[3:0], LFRAME#, LCLK, and CLKRUN# signals enabling clock gating. The device supports SERIRQ for interrupt signaling and uses SB3V for standby voltage rail management-critical for low-power resume states in ACPI-compliant systems.
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 RSA sign in ≤200 ms - meets TCG latency requirements for measured boot attestation |
| SHA-1 Throughput | 20 µs per 64-byte block - accelerates PCR extension during system boot measurement |
| LPC Interface | 33 MHz synchronous bus with LAD[3:0], LFRAME#, CLKRUN#, SERIRQ - compatible with Intel PCH LPC controllers |
| Secure Storage | 1280 bytes of NV user-defined space + internal EEPROM for RSA keys - supports persistent credential binding without external flash |
| Operating Range | -40°C to +85°C - qualified for industrial and server motherboard environments |
| Supply Voltage | 3.3 V ±10% - matches standard LPC I/O voltage domain on modern motherboards |
Pinout & Package
AT97SC3204-U1A50 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 power supply | 3.3 V core and I/O rail; decoupling required per LPC spec |
| SB3V | Standby voltage rail | Supplies RTC and wake logic during S3/S4 sleep states; must be stable when VCC is off |
| LAD0–LAD3 | LPC bidirectional data/address bus | Time-multiplexed command/address/data; requires pull-up resistors and signal integrity tuning |
| LCLK | LPC clock input | 33 MHz source-synchronous clock; jitter < ±100 ps RMS for reliable frame sampling |
| LFRAME# | Frame strobe | Active-low start-of-transaction signal; defines LPC cycle boundaries |
| SERIRQ | Serialized interrupt request | Open-drain IRQ line shared across LPC peripherals; requires external pull-up |
| CLKRUN# | PCI clock run control | Enables dynamic clock stopping during idle; critical for mobile platform power savings |
| LRESET# | PCI reset input | Asynchronous active-low reset; synchronizes TPM state with host PCH reset sequence |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA Engine | Dedicated crypto accelerator eliminates software-based RSA bottlenecks in measured boot and remote attestation flows |
| FIPS 140-2 RNG | True random number generator certified for key generation and protocol nonces-required for TCG-compliant key derivation |
| Internal Key Cache | Dynamic EEPROM management handles multiple loaded keys without host intervention or firmware updates |
| LPC Power Management | CLKRUN# and SB3V support enable full ACPI S3/S4 compatibility without TPM-induced wake latency |
| Physical Security Circuitry | Active tamper detection, bus encryption, and layout-hardened design prevent probing and fault injection attacks |
Applications
| Desktop PC Platform Security | Server BMC Integration |
|---|---|
Use Scenario: Enabling Windows BitLocker drive encryption and UEFI Secure Boot validation on x86 desktop motherboards. IC Role / Device Role / Timing Role: Root-of-trust anchor that measures boot firmware and OS loader into PCRs before execution begins. Use Value: Prevents offline disk decryption by binding encryption keys to unmodified boot chain measurements stored in protected TPM NV space. | Use Scenario: Providing hardware-backed attestation and secure key storage for IPMI-enabled server baseboard management controllers. IC Role / Device Role / Timing Role: Isolated security co-processor handling certificate enrollment, TLS key exchange, and firmware integrity verification. Use Value: Enables zero-touch provisioning and remote health attestation without exposing private keys to BMC software stack. |
| Industrial Embedded Control | Thin Client Authentication |
Use Scenario: Securing firmware updates and operator authentication in programmable logic controllers (PLCs) operating in harsh environments. IC Role / Device Role / Timing Role: Trusted execution environment for validating signed firmware images and enforcing access control policies. Use Value: Guarantees update authenticity and prevents unauthorized configuration changes using TPM-stored endorsement keys. | Use Scenario: Enforcing single-sign-on and smart card emulation in cloud-connected thin clients with limited local storage. IC Role / Device Role / Timing Role: Cryptographic service provider for PKI-based user authentication and session key wrapping. Use Value: Eliminates need for external secure elements while supporting FIDO2/WebAuthn protocols via TPM-resident attestation keys. |
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 SLB9665 TT 1.2 | Same TCG v1.2 compliance; uses ARM-based crypto core instead of AVR; supports SPI interface option alongside LPC | Broader interface flexibility but requires different driver stack; lacks native CLKRUN# support for aggressive power gating | Select when SPI interface or ARM firmware extensibility is prioritized over strict LPC timing compatibility |
| Nuvoton NPCT750KB0GX | TCG v1.2 compliant; integrated SHA-256 engine (not SHA-1 only); higher RSA throughput (2048-bit in 150 ms) | Supports newer cryptographic primitives required for post-2018 UEFI implementations; not backward-compatible with legacy SHA-1-only BIOS | Select when migrating to SHA-256–based attestation or targeting platforms requiring faster key operations |
Compared with Infineon SLB9665 TT 1.2 and Nuvoton NPCT750KB0GX, the AT97SC3204-U1A50 delivers proven LPC timing compliance and minimal integration overhead for legacy and mid-life PC platforms, while retaining full TCG 1.2 functionality at lower firmware complexity and cost.
Availability
AT97SC3204-U1A50 is available at Aetrix Electronics and suitable for desktop PC platform security, server BMC integration, and industrial embedded control requiring stable component supply and long-term lifecycle assurance.
Supply support for AT97SC3204-U1A50 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-U1A50 belongs to Atmel's PC Security product line, engineered specifically to deliver certified, drop-in TPM 1.2 functionality for x86 platform manufacturers needing hardware-rooted trust without custom firmware development.
FAQ
What is the primary security function of the AT97SC3204-U1A50?
The AT97SC3204-U1A50 serves as a TCG-compliant Trusted Platform Module implementing hardware-based cryptographic operations-including 2048-bit RSA signing, SHA-1 hashing, and FIPS 140-2–certified random number generation-to establish a hardware-rooted chain of trust for boot integrity, disk encryption, and remote attestation. Its internal EEPROM stores RSA keys securely, and its LPC interface enables seamless integration into x86 platforms. The AT97SC3204-U1A50 is designed to meet the exact functional and timing requirements of the TCG PC Client Specific TPM Interface Specification v1.2.
Does the AT97SC3204-U1A50 support both commercial and industrial temperature ranges?
Yes, the AT97SC3204-U1A50 is qualified for operation across -40°C to +85°C (industrial grade), as confirmed in Atmel's ordering documentation and package addendum. This makes it suitable for deployment in server motherboards, industrial PLCs, and embedded systems exposed to extended thermal environments. The AT97SC3204-U1A50 maintains full TCG v1.2 functionality and cryptographic performance across this entire range without derating.
What package type is used for the AT97SC3204-U1A50?
The AT97SC3204-U1A50 uses a 28-lead Thin TSSOP package (4.4 mm × 9.7 mm body, 0.65 mm pitch), designated as 28A2 per Atmel's package drawings and ordering table. This RoHS-compliant, lead-free package aligns with JEDEC MO-153 Variation AE and is optimized for high-density motherboard layouts requiring minimal PCB real estate. The AT97SC3204-U1A50 does not use QFN or standard TSSOP variants in this specific ordering code.
How does the AT97SC3204-U1A50 handle power management in mobile platforms?
The AT97SC3204-U1A50 supports ACPI-compliant power management via dedicated signals: CLKRUN# enables dynamic clock stopping during LPC idle periods, and SB3V provides a separate standby rail to maintain critical state (e.g., wake timers, interrupt latches) while main VCC is powered down. These features allow the AT97SC3204-U1A50 to operate in S3/S4 sleep states without compromising security posture or increasing resume latency. The AT97SC3204-U1A50 implements these functions per TCG PC Client specification requirements.
Is the AT97SC3204-U1A50 firmware upgradable in the field?
No-the AT97SC3204-U1A50 ships with factory-programmed, read-only firmware compliant with TCG TPM v1.2. Atmel delivered the firmware as a turnkey solution, and no mechanism exists for field upgrades or reprogramming. All cryptographic primitives, command handlers, and state machines are fixed in ROM. This immutability ensures deterministic behavior and prevents compromise via malicious firmware updates. The AT97SC3204-U1A50 is intended for deployments where certified, static TPM functionality is required.
AT97SC3204-U1A50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.240", 6.10mm 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-U1A50 FAQ
1.How can I place an order for AT97SC3204-U1A50 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-U1A50 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-U1A50 reliable?
The price and inventory of AT97SC3204-U1A50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-U1A50 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-U1A50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-U1A50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-U1A50?
AT97SC3204-U1A50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-U1A50 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-U1A50?
For technical support, including AT97SC3204-U1A50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-U1A50 requirements.
6.How does Aetrix verify that AT97SC3204-U1A50 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-U1A50 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-U1A50 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-U1A50?
All AT97SC3204-U1A50 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-U1A50, 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-U1A50 part is unused and in its original packaging.
Return procedure for AT97SC3204-U1A50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-U1A50 Tags
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CYPD3175-24LQXQ
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SLB9672VU20FW1523XTMA1
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SLB9670VQ20FW785XTMA1
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AT97SC3204-U2A1A-20
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SLM9670AQ20FW1311XTMA1
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SLB9672XU20FW1613XTMA1
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