My Inquiry
My Account
Microchip Technology AT97SC3204T-U2A1B-10
- Part No.:
- AT97SC3204T-U2A1B-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204T-U2A1B-10.pdf
- Description:
- IC CRYPTO TPM TWI 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3204T-U2A1B-10 from Microchip Technology (acquired Atmel in 2016) is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and LPC Interface Specification 1.2. It integrates an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2–compliant RNG, 3.3V supply, and 1756-byte NV user storage. It serves as a secure root-of-trust in PC motherboard designs.
For engineers reviewing the AT97SC3204T-U2A1B-10 datasheet, AT97SC3204T-U2A1B-10 pinout, AT97SC3204T-U2A1B-10 application, or AT97SC3204T-U2A1B-10 equivalent, this page delivers verified technical context, LPC bus timing constraints, GPIO-Express-00 assignment, industrial temperature range (-40°C to +85°C), and package-specific pin validation for 40-pin QFN (40ML1).
Technical Context
The AT97SC3204T-U2A1B-10 implements a full TCG TPM 1.2 stack in silicon, including dedicated hardware for SHA-1 acceleration (20μs per 64-byte block) and asymmetric key generation via its internal RNG and crypto engine. It uses dynamic EEPROM-based key cache management without host intervention beyond standard TCG commands like TPM_FlushSpecific.
LPC interface operation includes SIRQ for interrupt signaling and CLKRUN# support for clock gating during low-power states in mobile platforms. The device requires 33MHz LCLK and operates exclusively on 3.3V VCC and SB3V standby rails, with no voltage translation or level-shifting circuitry integrated.
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 OEM systems. |
| RSA Performance | 2048-bit RSA signature in 200ms - meets TPM 1.2 latency requirements for platform authentication and key sealing. |
| SHA-1 Throughput | 20μs per 64-byte block - supports fast hash chaining for PCR extension and integrity measurement logging. |
| Random Number Generation | FIPS 140-2–certified RNG - provides cryptographically secure entropy for key derivation and protocol nonces. |
| Non-Volatile Storage | 1756 bytes of user-defined NV space - allows persistent storage of credentials, policies, or sealed data without external memory. |
| Supply Voltage | 3.3V ±5% on VCC and SB3V - mandates single-rail power design with tight regulation; no 5V or dual-supply support. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade motherboard deployment, including embedded PCs and thin clients. |
Pinout & Package
AT97SC3204T-U2A1B-10 is packaged in a 40-pad QFN (40ML1), 6.0 mm × 6.0 mm body, 0.50 mm pitch, with exposed thermal pad. Pinout validated per Atmel-5295ES datasheet summary Table 1-2 and Figure 1 (40-pin QFN layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 3.3V core rail; must be decoupled locally with ≥10μF + 100nF ceramic capacitors. |
| SB3V | Standby power supply input | 3.3V standby rail; maintains RTC and state retention during S3/S4 sleep states. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data bus; requires pull-up resistors per LPC spec (4.7kΩ typical). |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction; synchronous with LCLK edge. |
| LCLK | LPC clock input | 33MHz fixed-frequency clock; jitter < ±100ps RMS required for reliable TIS timing compliance. |
| SERIRQ | Serialized interrupt request | Open-drain shared interrupt line; requires external pull-up and arbitration logic per LPC bus topology. |
| CLKRUN# | PCI clock run control | Enables dynamic clock gating for power savings; asserted low to stop LCLK during idle cycles. |
| GPIO-Express-00 | General-purpose I/O | Configurable as TPM_NV_INDEX_GPIO_00 per TCG specification; supports firmware-controlled status signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware crypto accelerator | Dedicated RSA/SHA-1 engine offloads CPU during attestation and sealing - eliminates software-only TPM latency bottlenecks. |
| Integrated AVR RISC CPU | On-chip 8-bit processor executes full TCG firmware stack - eliminates external controller and reduces BOM count. |
| FIPS 140-2 RNG | Entropy source certified for cryptographic key generation - satisfies NIST SP 800-140B requirements for production TPM deployments. |
| LPC interface compliance | Native 33MHz LPC bus with SIRQ/CLKRUN# support - enables plug-and-play integration into Intel/AMD chipset reference designs. |
| EEPROM-based key storage | Internal non-volatile memory stores multiple RSA keys with automatic cache management - removes need for external secure flash or battery-backed RAM. |
Applications
| Secure Boot Authentication | Platform Integrity Measurement |
|---|---|
Use Scenario: Verifying firmware image authenticity before UEFI execution on x86 motherboards. IC Role / Device Role / Timing Role: Root-of-trust anchor performing SHA-1 hashing and RSA signature verification of boot firmware blocks. Use Value: Prevents unauthorized firmware modification by enforcing cryptographic chain-of-trust from reset vector through OS loader. | Use Scenario: Logging system configuration changes (e.g., BIOS settings, driver loads) into Platform Configuration Registers (PCRs). IC Role / Device Role / Timing Role: Secure hash accumulator using hardware-accelerated SHA-1 engine to extend PCR values atomically. Use Value: Enables remote attestation of runtime system state with sub-20μs per-block hashing latency. |
| Sealed Data Protection | Hardware-Based Key Management |
Use Scenario: Encrypting disk encryption keys so they only decrypt when platform measurements match expected PCR values. IC Role / Device Role / Timing Role: Cryptographic vault executing TPM_Seal and TPM_Unseal commands using internal RSA keys and NV storage. Use Value: Ensures BitLocker or LUKS keys remain inaccessible if boot path is tampered with - no software exposure of plaintext keys. | Use Scenario: Generating and storing asymmetric key pairs used for TLS client authentication in embedded gateways. IC Role / Device Role / Timing Role: On-device key generator leveraging FIPS-certified RNG and protected EEPROM storage for private key persistence. Use Value: Eliminates need for external HSM or key injection during manufacturing - supports zero-touch provisioning. |
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 SLB9670 | TPM 2.0 compliant; supports ECC and SHA-256; 40-pin QFN but different pin mapping (e.g., no CLKRUN#) | Required for Windows 11 certification; not backward-compatible with legacy TIS 1.2 LPC drivers | Select for new designs targeting TPM 2.0 mandates; requires BIOS/firmware rewrite and layout revision. |
| Nuvoton NPCT750 | TPM 1.2 compliant; same 33MHz LPC interface; 32-pin QFN (5×5mm, 0.5mm pitch); lacks GPIO-Express-00 | Lower pin count reduces PCB area; limited NV storage (1024 bytes vs. 1756 bytes) | Choose for cost-sensitive industrial PCs where GPIO flexibility and extended NV space are non-critical. |
Compared with SLB9670 and NPCT750, the AT97SC3204T-U2A1B-10 uniquely balances TCG 1.2 compliance, industrial temperature support, GPIO-Express-00 configurability, and 1756-byte NV capacity - making it optimal for legacy BIOS-based embedded systems requiring long-term availability and minimal firmware porting effort.
Availability
AT97SC3204T-U2A1B-10 is available at Aetrix Electronics and suitable for secure boot authentication, platform integrity measurement, and sealed data protection requiring stable component supply across industrial PC, thin client, and embedded gateway programs.
Supply support for AT97SC3204T-U2A1B-10 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 legacy Atmel security ICs.
The AT97SC3204T-U2A1B-10 belongs to Atmel's TPM security controller family, designed specifically for hardware-enforced trust in PC-class and industrial embedded platforms requiring TCG-compliant root-of-trust functionality.
FAQ
What is the primary interface protocol supported by the AT97SC3204T-U2A1B-10?
The AT97SC3204T-U2A1B-10 supports the Low Pin Count (LPC) bus interface at 33MHz, fully compliant with TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. It uses LAD0–LAD3 for time-multiplexed command/address/data transfer, LFRAME# for transaction framing, and SERIRQ for interrupt signaling. The AT97SC3204T-U2A1B-10 does not support SPI, I²C, or UART interfaces.
Does the AT97SC3204T-U2A1B-10 support TPM 2.0 functionality?
No, the AT97SC3204T-U2A1B-10 implements only TCG TPM specification version 1.2 and is not compatible with TPM 2.0 commands, algorithms (e.g., ECC, SHA-256), or authorization structures. It cannot be upgraded to TPM 2.0 via firmware update. For TPM 2.0 compliance, designers must select alternatives such as the Infineon SLB9670 or STMicroelectronics ST33TPHF2ES.
What is the function of the GPIO-Express-00 pin on the AT97SC3204T-U2A1B-10?
The GPIO-Express-00 pin on the AT97SC3204T-U2A1B-10 is assigned to TPM_NV_INDEX_GPIO_00 per TCG specification and can be configured by firmware to signal platform-specific status (e.g., secure boot completion or credential validation result). It operates as a CMOS output with 3.3V logic levels and requires external pull-up for open-drain compatibility in shared signal environments.
How much non-volatile user storage does the AT97SC3204T-U2A1B-10 provide?
The AT97SC3204T-U2A1B-10 provides 1756 bytes of user-defined non-volatile storage space in internal EEPROM, accessible via TCG-defined NV write/read commands. This space is separate from the reserved areas used for RSA keys and firmware variables, and is retained across power cycles without external backup power.
Is the AT97SC3204T-U2A1B-10 qualified for industrial temperature operation?
Yes, the AT97SC3204T-U2A1B-10 is qualified for industrial temperature range operation from -40°C to +85°C, as confirmed in Atmel's ordering information and package documentation. This rating applies to both the 40ML1 QFN and 28X1 TSSOP variants, making the AT97SC3204T-U2A1B-10 suitable for fanless embedded PCs, network appliances, and factory automation controllers.
AT97SC3204T-U2A1B-10 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:
- 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-U2A1B-10 FAQ
1.How can I place an order for AT97SC3204T-U2A1B-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204T-U2A1B-10 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-U2A1B-10 reliable?
The price and inventory of AT97SC3204T-U2A1B-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204T-U2A1B-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204T-U2A1B-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204T-U2A1B-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204T-U2A1B-10?
AT97SC3204T-U2A1B-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204T-U2A1B-10 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-U2A1B-10?
For technical support, including AT97SC3204T-U2A1B-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204T-U2A1B-10 requirements.
6.How does Aetrix verify that AT97SC3204T-U2A1B-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204T-U2A1B-10 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-U2A1B-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204T-U2A1B-10?
All AT97SC3204T-U2A1B-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204T-U2A1B-10, 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-U2A1B-10 part is unused and in its original packaging.
Return procedure for AT97SC3204T-U2A1B-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204T-U2A1B-10 Tags
-
CYPD3175-24LQXQ
Infineon Technologies
-
SLB9672VU20FW1523XTMA1
Infineon Technologies
-
SLB9670VQ20FW785XTMA1
Infineon Technologies
-
SLB9672XU20FW1523XTMA1
Infineon Technologies
-
SLB9673XU20FW2613XTMA1
Infineon Technologies
-
CYPD3125-40LQXIT
Infineon Technologies
-
AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
-
SLB9672AU20FW1613XTMA1
Infineon Technologies
-
SLB9673AU20FW2613XTMA1
Infineon Technologies
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
