My Inquiry
My Account
Microchip Technology AT97SC3205-X3M42-00
- Part No.:
- AT97SC3205-X3M42-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- -
- Datasheet:
-
AT97SC3205-X3M42-00.pdf
- Description:
- IC CRYPTO TPM 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3205-X3M42-00 from Microchip (formerly Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC implementing hardware-based cryptographic key generation, storage, and attestation in PC and embedded systems. It integrates an AVR RISC CPU, FIPS-140-2 certified RNG, AES/SHA/RSA engines, 2066-byte NV user storage, and SPI interface up to 45 MHz.
For engineers reviewing the AT97SC3205-X3M42-00 datasheet, AT97SC3205-X3M42-00 pinout, AT97SC3205-X3M42-00 application, or AT97SC3205-X3M42-00 equivalent, this page delivers verified package mapping (32-pad QFN), confirmed SPI-TIS 1.3 compliance, industrial temperature support (–40°C to +85°C), and exact pin-level circuit roles per official summary datasheet.
Technical Context
The AT97SC3205-X3M42-00 implements the full TCG TPM 1.2 stack in silicon, including a dedicated hardware crypto engine for RSA key generation and HMAC-SHA-1 operations, backed by internal EEPROM for persistent key storage. Its AVR core executes firmware that enforces secure boot measurement, platform configuration register (PCR) updates, and sealed storage.
It operates exclusively via SPI with active-low chip select (SPI_CS#), interrupt (PIRQ#), and reset (SPI_RST#) signals, and supports hardware physical presence assertion via PP/GPIO. The device enters automatic low-power mode during idle cycles without system intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 Specification and PC Client-Specific TIS 1.3 - ensures interoperability with BIOS/UEFI and OS-level TPM stacks. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES, SHA, and RSA - enables trusted key derivation and signature generation without software exposure. |
| Interface | SPI up to 45 MHz (typical PC range: 24–33 MHz) - supports high-throughput command/response transactions with minimal latency. |
| Supply Voltage | 3.3 V ±10% - requires tight decoupling (2200–4700 pF near each VCC pin, <5 mm to adjacent GND) for stable operation. |
| Temperature Range | –40°C to +85°C industrial grade - validated for extended thermal cycling in embedded control and server motherboard environments. |
| NV Storage | 2066 bytes user-defined data space - sufficient for storing platform-specific credentials, certificates, or sealed policy blobs. |
| Package | 32-pad QFN (4.0 × 4.0 × 0.9 mm, 0.4 mm pitch) - surface-mount compatible with automated PCB assembly and thermal pad grounding. |
Pinout & Package
AT97SC3205-X3M42-00 uses the 32-pad Very Thin QFN (32M3) package: 4.0 × 4.0 × 0.9 mm body, 0.4 mm lead pitch, exposed thermal pad tied internally to GND. Pin 1 marked by corner notch; substrate center pad must be connected to system ground for EMI and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires local 2200–4700 pF bypass capacitor within 5 mm of each VCC pin and adjacent GND. |
| GND | System ground reference | Multiple GND pins (including thermal pad) provide low-impedance return path and EMI suppression. |
| MISO / MOSI / SPI_CLK / SPI_CS# / SPI_RST# / PIRQ# | SPI bus interface | Full-duplex SPI slave interface compliant with TIS 1.3; active-low signals require pull-down or termination per spec. |
| PP/GPIO | Hardware physical presence indicator | Active-high GPIO used to assert physical presence for sensitive commands (e.g., TPM_Clear); internal pull-down. |
| TestBI/GPIO/XTamper | Multi-function terminal | Configurable as GPIO, external tamper detect (active-high), or manufacturing test input; tie to GND if unused. |
| GPIO Express-00 | Dedicated NV-indexed GPIO | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; floats high when unused - no external bias required. |
Key Features
| Feature | Design Value |
|---|---|
| FIPS-140-2 certified crypto module | Validated RNG, HMAC, AES, SHA, and RSA engines enable deployment in regulated environments requiring cryptographic assurance. |
| Integrated AVR RISC processor | On-chip 8-bit CPU executes TPM firmware independently - eliminates host dependency for critical security operations. |
| 2066-byte user NV storage | Non-volatile memory space allocated for OEM-specific keys, certificates, or sealed data - persists across power cycles and resets. |
| Hardware physical presence support | Dedicated PP/GPIO pin enables BIOS-level enforcement of physical authorization before destructive TPM commands. |
| Automatic low-power state | Enters power-saving mode during SPI inactivity - reduces quiescent current without host coordination or firmware overhead. |
Applications
| PC Motherboard Security | Industrial Control System Integrity |
|---|---|
Use Scenario: Embedded in desktop/laptop motherboards to enable BitLocker, Secure Boot, and measured boot. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust IC providing PCR extension, key sealing, and remote attestation over SPI. Use Value: Enables hardware-enforced chain-of-trust from power-on through OS load, preventing unauthorized firmware or bootloader modifications. | Use Scenario: Deployed in programmable logic controllers (PLCs) and HMIs to protect firmware updates and configuration data. IC Role / Device Role / Timing Role: Secure key vault and integrity verifier interfacing with ARM Cortex-M host via SPI at ≤33 MHz. Use Value: Prevents counterfeiting and unauthorized reprogramming using sealed storage and hardware-signed firmware validation. |
| Server Platform Authentication | Medical Device Data Protection |
Use Scenario: Integrated into rack-mounted server baseboard management controllers (BMCs) for out-of-band attestation. IC Role / Device Role / Timing Role: Trusted execution environment for BMC-side TPM commands, supporting remote health verification and credential binding. Use Value: Provides cryptographically verifiable platform identity and configuration state to cloud orchestration tools without exposing private keys. | Use Scenario: Used in FDA-cleared diagnostic imaging equipment to safeguard patient data encryption keys and audit logs. IC Role / Device Role / Timing Role: FIPS-140-2 Level 2 certified security module storing HIPAA-compliant key material and enabling secure boot verification. Use Value: Meets regulatory requirements for cryptographic key protection and tamper-evident logging via hardware-enforced access controls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665 TT 1.2 | Same TCG 1.2/TIS 1.3 compliance; uses ARM-based secure core instead of AVR; supports LPC interface in addition to SPI. | LPC support enables legacy x86 platform integration where SPI-only routing is constrained; higher pin count (32-pin QFN same footprint but different pinout). | Select when LPC fallback is required or when migrating from Infineon-based designs; verify SPI pin mapping and reset timing against AT97SC3205-X3M42-00. |
| NXP PTFT2100A | TPM 2.0 compliant (not 1.2); includes ECC acceleration; requires updated TCG stack and BIOS support; 3.3 V supply, same QFN-32 package outline. | Enables post-2016 Windows/Linux platforms requiring TPM 2.0 features (e.g., asymmetric key agility, algorithm agility); not backward-compatible with TPM 1.2 firmware. | Select for new designs targeting TPM 2.0 mandates; avoid for legacy TPM 1.2 deployments or systems with fixed BIOS versions. |
Compared with Infineon SLB9665 TT 1.2 and NXP PTFT2100A, the AT97SC3205-X3M42-00 offers proven TPM 1.2 interoperability with mature driver support, AVR-based deterministic execution, and industrial-grade thermal reliability - making it optimal for cost-sensitive, long-lifecycle embedded platforms requiring field-proven security without architectural migration.
Availability
AT97SC3205-X3M42-00 is available at Aetrix Electronics and suitable for PC motherboard security, industrial control system integrity, and server platform authentication requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT97SC3205-X3M42-00 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 its security IC portfolio, delivering high-reliability microcontrollers, analog, and trusted computing solutions for industrial, automotive, and communications markets.
The AT97SC3205-X3M42-00 belongs to Atmel's TPM product line, designed specifically to deliver certified, single-chip hardware root-of-trust for PC client and embedded platforms requiring TCG-compliant secure boot, attestation, and key management.
FAQ
What is the operating voltage range for AT97SC3205-X3M42-00?
The AT97SC3205-X3M42-00 operates at a nominal supply voltage of 3.3 V with ±10% tolerance (2.97 V to 3.63 V). Stable regulation and proper decoupling - including 2200–4700 pF capacitors placed within 5 mm of each VCC pin and adjacent GND - are mandatory for reliable TCG-compliant operation across the full industrial temperature range.
Does AT97SC3205-X3M42-00 support TPM 2.0?
No, AT97SC3205-X3M42-00 implements only TCG TPM Specification Version 1.2 and PC Client-Specific TIS Version 1.3. It does not support TPM 2.0 algorithms, command sets, or hierarchical key structures. For TPM 2.0 compliance, consider alternatives such as the NXP PTFT2100A or Infineon SLB9670.
What package type is used by AT97SC3205-X3M42-00?
AT97SC3205-X3M42-00 uses the 32-pad Very Thin QFN (32M3) package: 4.0 mm × 4.0 mm × 0.9 mm body size with 0.4 mm lead pitch and an exposed thermal pad tied internally to GND. This matches the ordering code suffix "X3M42" indicating QFN-32 industrial-grade variant.
How is physical presence asserted on AT97SC3205-X3M42-00?
Physical presence is asserted via the PP/GPIO pin on AT97SC3205-X3M42-00, which functions as an active-high hardware indicator. When driven high, it enables privileged TPM commands like TPM_Clear or TPM_OwnerSetDisable. The pin has an internal pull-down resistor, so it defaults to inactive (low) unless explicitly asserted by the platform's mechanical or electrical presence switch.
Is AT97SC3205-X3M42-00 FIPS-140-2 certified?
Yes, AT97SC3205-X3M42-00 is FIPS-140-2 Level 2 certified as a complete module, covering its hardware random number generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines. Certification applies to the integrated silicon solution - not just individual blocks - validating its use in regulated environments requiring cryptographic assurance.
AT97SC3205-X3M42-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- -
- 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:
- SPI
- Number of I/O:
- 4
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AT97SC3205-X3M42-00 FAQ
1.How can I place an order for AT97SC3205-X3M42-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205-X3M42-00 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 AT97SC3205-X3M42-00 reliable?
The price and inventory of AT97SC3205-X3M42-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205-X3M42-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3205-X3M42-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205-X3M42-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205-X3M42-00?
AT97SC3205-X3M42-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205-X3M42-00 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 AT97SC3205-X3M42-00?
For technical support, including AT97SC3205-X3M42-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205-X3M42-00 requirements.
6.How does Aetrix verify that AT97SC3205-X3M42-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205-X3M42-00 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 AT97SC3205-X3M42-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3205-X3M42-00?
All AT97SC3205-X3M42-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205-X3M42-00, 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 AT97SC3205-X3M42-00 part is unused and in its original packaging.
Return procedure for AT97SC3205-X3M42-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205-X3M42-00 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…
