My Inquiry
My Account
Microchip Technology AT97SC3205T-G3M44-00
- Part No.:
- AT97SC3205T-G3M44-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M44-00.pdf
- Description:
- PRODSTD COM I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3205T-G3M44-00 from Microchip Technology (acquired Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC integrating an AVR® RISC microprocessor, hardware asymmetric crypto engine, FIPS-140-2 certified RNG/AES/SHA/RSA engines, and 2066-byte NV user storage. It operates at 3.3V with I²C interface (400 kHz Fast Mode) and targets secure boot, platform authentication, and key management in embedded systems.
For engineers reviewing the AT97SC3205T-G3M44-00 datasheet, AT97SC3205T-G3M44-00 pinout, AT97SC3205T-G3M44-00 application, or AT97SC3205T-G3M44-00 equivalent, this page delivers verified package mapping (32-pad QFN), confirmed I²C timing constraints, GPIO-Express-00 and PP/GPIO functional roles, low-power TWI_Wakeup# recovery behavior, and FIPS-140-2 module certification scope.
Technical Context
The AT97SC3205T-G3M44-00 implements the full TCG TPM 1.2 specification stack in silicon, including command parsing, cryptographic acceleration, and secure non-volatile key storage in internal EEPROM. Its AVR CPU executes firmware that enforces strict physical and logical security boundaries between host I²C transactions and protected crypto operations.
It supports two power states-active and deep sleep-with TWI_Wakeup# requiring dual-pin assertion for recovery. The RNG is FIPS-140-2 validated and feeds all key generation and protocol randomness requirements, while HMAC, AES-128, SHA-1, and RSA-2048 engines operate under hardware-enforced isolation from general-purpose memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification fully implemented per TCG Main Specification Parts 1–3; no software stack required on host. |
| I²C Interface | 400 kHz Fast Mode / 100 kHz Standard Mode; SM_DAT pull-up ≤800 Ω and SM_CLK ≤1.5 kΩ required for stable high-speed operation. |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC-SHA1, AES-128, SHA-1, and RSA-2048; all executed in hardened hardware with side-channel resistance. |
| Non-Volatile Storage | 2066 bytes user-defined NV space + dedicated RSA key storage; managed via TCG commands (e.g., TPM_LoadKey2) without host memory management. |
| Supply Voltage | 3.3 V ±10%; requires local decoupling: 2200–4700 pF capacitor <5 mm from each VCC pin to adjacent GND, plus 0.1 µF at VCC node <10 mm from device. |
| Operating Temp | Industrial range: −40°C to +85°C; validated across full range for cryptographic stability and I²C timing margin. |
| Package | 32-pad QFN (32M3), 4.0 × 4.0 × 0.90 mm body, 0.40 mm pitch; exposed thermal pad internally tied to GND. |
Pinout & Package
AT97SC3205T-G3M44-00 uses the 32-pad QFN (32M3) package: 4.0 × 4.0 mm body, 0.40 mm pitch, exposed center pad tied to GND. Pinout validated per Atmel-8883AS datasheet summary Figures 1-1 and Table 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires strict decoupling per datasheet layout rules to prevent crypto state corruption. |
| GND | Ground reference | System ground; center thermal pad must be connected to GND plane for thermal and EMI integrity. |
| SM_DAT / SM_CLK | I²C bidirectional data / clock | Host-to-TPM communication channel; timing-critical at 400 kHz; pull-up values directly impact bus reliability. |
| GPIO-Express-00 | Dedicated NV-mapped GPIO | Hardwired to TPM_NV_INDEX_GPIO_00; internal pull-up; used for secure status signaling without host driver overhead. |
| PP/GPIO | Physical Presence indicator | Hardware-level assertion of admin presence; active-high; internal pull-down; enables secure BIOS/UEFI configuration lock. |
| TWI_Wakeup# | Deep sleep recovery trigger | Two-pin active-low signal required to exit low-power mode; prevents accidental wake from noise or single-point fault. |
| PIRQ# | Interrupt request output | Open-drain active-low interrupt to host; signals completion of long crypto operations (e.g., RSA signing) without polling. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Eliminates external firmware, crypto co-processor, or secure memory - reduces BOM count and attack surface. |
| FIPS-140-2 Level 2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines; validates physical tamper resistance and algorithmic correctness for regulated deployments. |
| Hardware-based key storage | RSA private keys stored in internal EEPROM with zero exposure to host memory or debug interfaces - immune to cold-boot or DMA attacks. |
| Low-power deep sleep mode | Automatically entered during idle; recovery requires coordinated TWI_Wakeup# pulse - extends system battery life without compromising security latency. |
| GPIO-Express architecture | Pre-mapped NV indices (e.g., GPIO-Express-00) enable deterministic, low-latency secure I/O without runtime configuration or driver complexity. |
Applications
| Secure Boot Authentication | Platform Integrity Verification |
|---|---|
Use Scenario: Verifying firmware signature before UEFI/BIOS execution in industrial gateways. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor; measures boot components into PCR registers and signs attestation reports. Use Value: Prevents unauthorized firmware modification by validating SHA-1 hashes against RSA-signed certificates stored in AT97SC3205T-G3M44-00 EEPROM. | Use Scenario: Detecting runtime tampering in medical imaging controllers. IC Role / Device Role / Timing Role: Monitors critical memory regions and logs changes to PCRs; triggers PIRQ# on anomaly detection. Use Value: Enables real-time response to memory corruption using hardware-accelerated SHA-1 and secure NV storage for forensic logs. |
| Hardware Physical Presence Control | Secure Key Management for IoT Edge Nodes |
Use Scenario: Enabling BIOS password reset only when technician presses physical button on kiosk panel. IC Role / Device Role / Timing Role: PP/GPIO pin asserts high upon button press; TPM validates presence before unlocking sensitive NVRAM settings. Use Value: Enforces human-in-the-loop policy enforcement without host CPU involvement - blocks remote privilege escalation. | Use Scenario: Storing TLS private keys for encrypted MQTT communication in smart grid sensors. IC Role / Device Role / Timing Role: Generates and stores ECC/RSA keys in protected EEPROM; performs AES-128 encryption of sensor payloads. Use Value: Eliminates key exposure risk during OTA updates by isolating crypto operations from the application MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9670 | TPM 2.0 compliant; supports SHA-256 and ECC; larger 6 × 6 mm QFN package; higher current draw in active mode. | Required for Windows 11 compliance; not drop-in compatible due to different command set and I²C address mapping. | Select if migrating to TPM 2.0 mandates or SHA-256/ECC crypto is required; redesign needed for pinout and firmware. |
| Nuvoton NPCT750 | TPM 1.2 compliant; same 32-pin QFN footprint; supports 1.8 V/3.3 V dual supply; lacks FIPS-140-2 Level 2 certification for RNG/crypto engines. | Suitable for cost-sensitive industrial control where formal crypto validation is not mandated. | Choose for pin-compatible replacement where FIPS certification is not contractually required; verify host driver compatibility. |
Compared with SLB9670 and NPCT750, the AT97SC3205T-G3M44-00 provides validated FIPS-140-2 Level 2 assurance for legacy TPM 1.2 deployments, minimal board space (4.0 × 4.0 mm), and deterministic GPIO-Express behavior - making it optimal for field-deployed equipment requiring long-term crypto stability without OS upgrade pressure.
Availability
AT97SC3205T-G3M44-00 is available at Aetrix Electronics and suitable for secure boot authentication, platform integrity verification, hardware physical presence control, and secure key management requiring stable component supply across industrial temperature ranges.
Supply support for AT97SC3205T-G3M44-00 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 trusted computing product line. The company specializes in secure microcontrollers, analog, and Flash-IP solutions for industrial, automotive, and communications markets.
The AT97SC3205T-G3M44-00 belongs to Atmel's TPM security IC family, designed specifically for embedded systems requiring hardware-rooted trust, cryptographic acceleration, and TCG specification compliance without host software dependency.
FAQ
What is the operating voltage range for the AT97SC3205T-G3M44-00?
The AT97SC3205T-G3M44-00 operates at a nominal supply voltage of 3.3 V ±10%, validated across the full industrial temperature range (−40°C to +85°C). It does not support 1.8 V or 5 V operation. Decoupling must follow Atmel's layout guidelines: 2200–4700 pF capacitors placed within 5 mm of each VCC pin to adjacent GND, plus a 0.1 µF capacitor at the VCC node within 10 mm of the device.
Does the AT97SC3205T-G3M44-00 support TPM 2.0?
No, the AT97SC3205T-G3M44-00 implements only the TCG TPM 1.2 specification. It does not support TPM 2.0 features such as SHA-256, ECC algorithms, or the new command hierarchy. Migration to TPM 2.0 requires hardware replacement (e.g., Infineon SLB9670) and firmware rework, as AT97SC3205T-G3M44-00 lacks backward-compatible 2.0 command support.
How is low-power mode managed on the AT97SC3205T-G3M44-00?
The AT97SC3205T-G3M44-00 enters low-power sleep automatically during idle periods. Recovery requires asserting both TWI_Wakeup# pins low simultaneously - a deliberate dual-signal requirement to prevent spurious wake events. This behavior is enforced in hardware and does not rely on host-controlled register writes or clock gating.
What certifications apply to the AT97SC3205T-G3M44-00's cryptographic functions?
The AT97SC3205T-G3M44-00's RNG, HMAC, AES, SHA, and RSA engines are covered under its FIPS-140-2 Level 2 certification. This validation includes physical security testing (tamper evidence), algorithmic correctness, and operational environmental robustness. Certification documentation is maintained by Atmel/Microchip and applies specifically to the AT97SC3205T-G3M44-00 device variant.
Can the AT97SC3205T-G3M44-00 be used in automotive applications?
No - the AT97SC3205T-G3M44-00 is not qualified for automotive use. Atmel explicitly states in its disclaimer that its products are "not intended, authorized, or warranted for use in automotive applications unless specifically designated as automotive-grade." This part is rated only for commercial and industrial temperature ranges and lacks AEC-Q100 qualification or automotive-specific failure mode analysis.
AT97SC3205T-G3M44-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- 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:
- 4
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205T-G3M44-00 FAQ
1.How can I place an order for AT97SC3205T-G3M44-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M44-00 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 AT97SC3205T-G3M44-00 reliable?
The price and inventory of AT97SC3205T-G3M44-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-G3M44-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M44-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M44-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M44-00?
AT97SC3205T-G3M44-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M44-00 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 AT97SC3205T-G3M44-00?
For technical support, including AT97SC3205T-G3M44-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M44-00 requirements.
6.How does Aetrix verify that AT97SC3205T-G3M44-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M44-00 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 AT97SC3205T-G3M44-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M44-00?
All AT97SC3205T-G3M44-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M44-00, 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 AT97SC3205T-G3M44-00 part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M44-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M44-00 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…
