My Inquiry
My Account
Microchip Technology AT97SC3205T-H3M44-00
- Part No.:
- AT97SC3205T-H3M44-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-H3M44-00.pdf
- Description:
- PRODSTD IND I2C TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3205T-H3M44-00 from Microchip Technology (formerly Atmel) is a TCG-compliant Trusted Platform Module implementing TPM 1.2 specification, featuring an integrated AVR® RISC microprocessor, hardware asymmetric crypto engine, FIPS-140-2 certified RNG/AES/SHA/RSA engines, and 2066 bytes of user NV storage. It operates at 3.3V with I²C interface (400 kHz Fast Mode) and targets secure boot and platform integrity in embedded industrial systems.
For engineers reviewing the AT97SC3205T-H3M44-00 datasheet, AT97SC3205T-H3M44-00 pinout, AT97SC3205T-H3M44-00 application, or AT97SC3205T-H3M44-00 equivalent, this page delivers verified package mapping (32-pin QFN), confirmed I²C timing constraints, validated GPIO-Express-00 and PP/GPIO roles, low-power TWI_Wakeup# recovery behavior, and FIPS-140-2 module certification scope for cryptographic subsystem selection.
Technical Context
The AT97SC3205T-H3M44-00 integrates a dedicated AVR® 8-bit RISC CPU with on-chip EEPROM for RSA key storage and SRAM for runtime operations. Its crypto engine implements TCG-specified TPM 1.2 commands including TPM_FlushSpecific and TPM_LoadKey2 with dynamic internal key cache management requiring no host intervention.
Communication occurs exclusively via I²C (SM_DAT/SM_CLK) supporting 100 kHz Standard Mode and 400 kHz Fast Mode with strict pull-up requirements (800 Ω on SM_DAT, 1.5 kΩ on SM_CLK) and 50% duty cycle optimization for clock stability. The device enters automatic low-power sleep when idle and recovers only upon dual active-low TWI_Wakeup# pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification compliant; enables standardized platform authentication and attestation workflows |
| Crypto Engines | FIPS-140-2 certified RNG, HMAC, AES, SHA, and RSA engines; meets federal cryptographic validation requirements |
| I²C Interface | 400 kHz Fast Mode / 100 kHz Standard Mode; requires precise pull-up values (800 Ω/1.5 kΩ) and 50% duty cycle for reliable operation |
| Supply Voltage | 3.3 V ±10%; mandates tight decoupling: 2200–4700 pF caps <5 mm from each VCC–GND pair + 0.1 µF cap <10 mm at VCC node |
| NV Storage | 2066 bytes user-defined data space; persistent across power cycles without external memory |
| Operating Temp | Industrial range: −40°C to +85°C; qualified for extended-temperature embedded control and networking equipment |
| Package | 32-pad QFN (4.0 × 4.0 × 0.90 mm, 0.40 mm pitch); exposes thermal pad tied internally to GND |
Pinout & Package
AT97SC3205T-H3M44-00 uses a 32-pad Very Thin QFN (32M3) package with 0.40 mm pitch and internal GND connection on the exposed thermal pad. Pin assignments are defined per Atmel-8883AS-TPM-AT97SC3205T-Datasheet-Summary_022014 Table 1-2 and Figure 1-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V primary supply; requires localized decoupling capacitors (2200–4700 pF) within 5 mm of each VCC–GND pair |
| GND | System ground reference | Reference for all digital and analog circuitry; thermal pad is internally connected to GND |
| SM_DAT | I²C bidirectional data line | Open-drain I²C data; requires 800 Ω pull-up for stable 400 kHz operation; sensitive to trace capacitance |
| SM_CLK | I²C clock input | Open-drain I²C clock; requires 1.5 kΩ pull-up and near-50% duty cycle for timing margin at 400 kHz |
| GPIO-Express-00 | Dedicated NV-mapped GPIO | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; floats high when unused; used for XOR chain output in test mode |
| PP/GPIO | Physical presence indicator | Hardware physical presence signal (active-high); internal pull-down; floats low when unused |
| TWI_Wakeup# | Low-power recovery trigger | Two independent pins (TSSOP pin 7 & 22, QFN pin 19 & 27); both must be pulsed low to exit TPM_DeepSleep state |
| PIRQ# | Interrupt request output | Active-low interrupt signaling to host processor; must be pulled low if unused |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 implementation | Eliminates external microcontroller and crypto co-processor; reduces BOM count and board area in security-critical designs |
| FIPS-140-2 certified crypto modules | Validated RNG, HMAC, AES, SHA, and RSA engines enable compliance with federal and enterprise security policies |
| Internal EEPROM for RSA keys | Secure key storage isolated from host memory; prevents extraction during runtime or power loss |
| Dynamic key cache management | Automatic handling of TPM_FlushSpecific and TPM_LoadKey2 commands; no host firmware overhead for key lifecycle |
| Low-power sleep with dual-trigger wakeup | Reduces system standby current; requires coordinated pulse on two TWI_Wakeup# pins to resume operation |
Applications
| Server Boot Integrity | Industrial PLC Security |
|---|---|
Use Scenario: Verifying firmware authenticity and configuration integrity during BIOS/UEFI boot sequence in rack-mounted servers. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust anchor performing SHA-1/SHA-256 hashing of boot components and sealing secrets to platform state. Use Value: Prevents unauthorized firmware modification by binding cryptographic keys to measured boot logs stored in 2066-byte NV space. | Use Scenario: Securing remote firmware updates and operator authentication in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Hardware-based credential vault and HMAC generator for signed update packages and session keys. Use Value: Enables FIPS-140-2 validated AES encryption and RSA signature verification without exposing keys to PLC application code. |
| Network Appliance Attestation | Medical Device Data Integrity |
Use Scenario: Providing hardware-backed identity and platform configuration evidence to centralized security policy servers in firewalls and SD-WAN edge devices. IC Role / Device Role / Timing Role: TPM 1.2 command processor responding to TCG-standardized Quote and CertifyInfo requests over I²C. Use Value: Delivers cryptographically signed attestation reports using FIPS-certified RNG and SHA engines, meeting NIST SP 800-155 requirements. | Use Scenario: Ensuring audit log integrity and protecting patient data encryption keys in FDA-regulated diagnostic imaging systems. IC Role / Device Role / Timing Role: Secure non-volatile storage controller for HIPAA-compliant audit trails and RSA key pairs used in DICOM TLS handshakes. Use Value: Guarantees tamper-evident logging via TPM_NV_WriteLock and protects keys in on-chip EEPROM-no external secure element required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST33TPHF2XZ | 32-pin QFN, 3.3 V, TCG 1.2 compliant; includes additional SPI interface alongside I²C; lacks AVR CPU core - uses ARM-based secure processor | Supports dual-interface host connectivity; higher throughput for bulk cryptographic operations but larger firmware footprint | Select ST33TPHF2XZ when SPI host interface or ARM-based crypto acceleration is required; verify I²C timing compatibility with existing layout |
| SLB9670 | 32-pin QFN, 3.3 V, TCG 1.2 compliant; integrates Infineon OPTIGA™ security controller; supports optional TPM 2.0 firmware upgrade path | Offers forward-compatible migration path to TPM 2.0; different RNG architecture (not FIPS-140-2 Level 2 certified) | Select SLB9670 when future-proofing against TPM 2.0 adoption is prioritized; confirm RNG validation scope matches regulatory requirements |
Compared with ST33TPHF2XZ and SLB9670, the AT97SC3205T-H3M44-00 provides deterministic AVR-based execution, FIPS-140-2 Level 2 certified RNG/AES/SHA/RSA engines, and minimal I²C-only interface - making it optimal for cost-sensitive, I²C-limited industrial platforms requiring proven TCG 1.2 compliance without interface flexibility or upgrade paths.
Availability
AT97SC3205T-H3M44-00 is available at Aetrix Electronics and suitable for industrial PLCs, network security appliances, medical imaging systems, and server boot integrity solutions requiring stable component supply and long-term lifecycle support.
Supply support for AT97SC3205T-H3M44-00 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 full product support, documentation, and qualification for legacy Atmel security ICs including the AT97SC3205T series.
The AT97SC3205T-H3M44-00 belongs to Atmel's TPM family designed specifically for embedded systems requiring hardware-rooted trust, secure boot, and cryptographic acceleration without external processors or software stacks.
FAQ
What is the operating voltage range for the AT97SC3205T-H3M44-00?
The AT97SC3205T-H3M44-00 operates at a nominal supply voltage of 3.3 V with ±10% tolerance (2.97 V to 3.63 V). Its power integrity design mandates specific decoupling: 2200–4700 pF capacitors placed within 5 mm of each VCC–GND pair, plus a 0.1 µF capacitor located within 10 mm of the VCC node. This ensures stable operation across the industrial temperature range (−40°C to +85°C).
Does the AT97SC3205T-H3M44-00 support TPM 2.0?
No, the AT97SC3205T-H3M44-00 implements only the Trusted Computing Group (TCG) TPM 1.2 specification. It does not support TPM 2.0 features, commands, or algorithms. Its firmware, crypto engines, and command set are fixed to TPM 1.2 compliance as verified in the Atmel-8883AS-TPM-AT97SC3205T-Datasheet-Summary_022014. Migration to TPM 2.0 requires a different device such as the SLB9670.
What are the I²C timing requirements for reliable communication with the AT97SC3205T-H3M44-00?
The AT97SC3205T-H3M44-00 supports I²C Standard Mode (100 kHz) and Fast Mode (400 kHz). For 400 kHz operation, SM_DAT requires an 800 Ω pull-up resistor and SM_CLK requires a 1.5 kΩ pull-up resistor. Clock duty cycle should approach 50% to maximize timing margin. Deviations increase risk of arbitration loss or ACK timeout, especially under noise or trace-length mismatch.
How is low-power sleep managed in the AT97SC3205T-H3M44-00?
The AT97SC3205T-H3M44-00 automatically enters low-power sleep when idle. Recovery requires pulsing both TWI_Wakeup# pins (QFN pins 19 and 27) active-low simultaneously. This dual-trigger mechanism prevents spurious wakeups and ensures intentional resumption. If unused, pin 19 may float or tie to GND; pin 27 must be tied to GND or VCC - both configurations disable wakeup unless explicitly asserted.
Is the AT97SC3205T-H3M44-00 FIPS-140-2 certified?
Yes, the AT97SC3205T-H3M44-00 is FIPS-140-2 Level 2 certified as a complete module. Certification covers its hardware random number generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines. The certification applies to the entire AT97SC3205T family, including the AT97SC3205T-H3M44-00 variant in 32-pin QFN packaging, as documented in the official Atmel summary datasheet.
AT97SC3205T-H3M44-00 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205T-H3M44-00 FAQ
1.How can I place an order for AT97SC3205T-H3M44-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-H3M44-00 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-H3M44-00 reliable?
The price and inventory of AT97SC3205T-H3M44-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-H3M44-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-H3M44-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-H3M44-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-H3M44-00?
AT97SC3205T-H3M44-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-H3M44-00 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-H3M44-00?
For technical support, including AT97SC3205T-H3M44-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-H3M44-00 requirements.
6.How does Aetrix verify that AT97SC3205T-H3M44-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-H3M44-00 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-H3M44-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-H3M44-00?
All AT97SC3205T-H3M44-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-H3M44-00, 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-H3M44-00 part is unused and in its original packaging.
Return procedure for AT97SC3205T-H3M44-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-H3M44-00 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…
