My Inquiry
My Account
Microchip Technology AT97SC3205T-G3M4620B
- Part No.:
- AT97SC3205T-G3M4620B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-G3M4620B.pdf
- Description:
- PROD FF COM I2C TPM 4X4 32VQFN S
- Quantity:
- Payment:
- Shipping:
Inventory:2,050
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3205T-G3M4620B from Microchip (acquired Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC implementing hardware-based asymmetric cryptography, FIPS-140-2 certified RNG/AES/SHA/RSA engines, and 2066-byte NV user storage. It integrates an AVR® RISC microprocessor and operates at 3.3V with I²C interface up to 400kHz for secure boot, key management, and platform integrity verification in embedded host systems.
For engineers reviewing the AT97SC3205T-G3M4620B datasheet, AT97SC3205T-G3M4620B pinout, AT97SC3205T-G3M4620B application, or AT97SC3205T-G3M4620B equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options aligned with TPM 1.2 system integration requirements.
Technical Context
The AT97SC3205T-G3M4620B implements the full TCG TPM 1.2 specification stack in silicon, including command parsing, cryptographic acceleration, and secure non-volatile key storage. Its internal AVR® CPU executes firmware with physical tamper resistance, while the FIPS-140-2 certified RNG feeds all key generation and protocol randomness requirements.
Communication occurs exclusively via I²C (SM_DAT/SM_CLK), supporting both 100kHz standard mode and 400kHz fast mode with configurable pull-up values (800Ω on SM_DAT, 1.5kΩ on SM_CLK). The device enters low-power sleep automatically when idle and recovers via TWI_Wakeup# pin sequence, requiring no host-side power management intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with Trusted Computing Group TPM Specification Version 1.2 - enables interoperable trusted boot and attestation in PC, server, and embedded platforms. |
| Crypto Engine | Hardware-accelerated RSA, SHA-1, HMAC, and AES - offloads cryptographic operations from host CPU and prevents software-side key exposure. |
| RNG Certification | FIPS-140-2 certified random number generator - provides cryptographically secure entropy for key derivation and protocol nonces. |
| I²C Interface | 400kHz Fast Mode / 100kHz Standard Mode - supports high-speed host communication with deterministic timing for TPM command/response cycles. |
| Supply Voltage | 3.3V ±10% - requires tight decoupling (2200–4700pF near each VCC pin, 0.1μF at VCC node) to maintain stable operation across temperature ranges. |
| Operating Temp | Industrial range: −40°C to +85°C - qualified for deployment in ruggedized industrial controllers and network infrastructure equipment. |
| NV Storage | 2066 bytes of user-defined non-volatile storage - enables persistent configuration, policy data, or custom credentials without external EEPROM. |
Pinout & Package
AT97SC3205T-G3M4620B is available in two RoHS-compliant packages: 28-pin Thin TSSOP (4.4mm × 9.7mm, 0.65mm pitch) and 32-pad QFN (4.0mm × 4.0mm, 0.40mm pitch, exposed thermal pad tied to GND). Both packages support industrial temperature range and share identical pin functionality except for NC pin count and layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3V main supply; requires dedicated 2200–4700pF bypass capacitor within 5mm of each VCC pin and 0.1μF bulk cap at VCC node. |
| GND | System ground reference | Multiple GND pins provide low-impedance return paths; QFN center pad must be connected to GND for thermal and electrical stability. |
| SM_DAT / SM_CLK | I²C bidirectional data/clock | Host interface pins; require external pull-ups (800Ω on SM_DAT, 1.5kΩ on SM_CLK) for reliable 400kHz operation and 50% duty cycle clock. |
| LRESET# | Active-low reset input | Asynchronous reset; minimum 2μs pulse width required; must remain asserted until VCC stabilizes after power-on. |
| PP/GPIO | Physical presence indicator / GPIO | Active-high hardware physical presence signal; internal pull-down; floats high when asserted - used for BIOS-level TPM enable/disable confirmation. |
| TWI_Wakeup# | Low-power recovery trigger | Two-pin wake sequence (both pulsed low) required to exit deep sleep; enables zero-power retention during host standby states. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 solution | Integrates CPU, crypto engine, RNG, EEPROM, and I²C interface in one die - eliminates multi-chip design complexity and inter-chip timing risks. |
| FIPS-140-2 certification | Covers RNG, HMAC, AES, SHA, and RSA engines - satisfies compliance requirements for government, finance, and healthcare embedded systems. |
| Secure key storage | Internal EEPROM stores RSA keys with hardware protection against extraction - prevents key leakage even under physical probing or fault injection. |
| GPIO-Express-00 mapping | Dedicated NV index (TPM_NV_INDEX_GPIO_00) enables persistent GPIO state retention across reboots - supports tamper-detection logging or secure configuration flags. |
| XTAMPER support | TestBI/GPIO/XTAMPER pin implements external tamper detection - triggers secure erase on physical intrusion attempt per Atmel-specific command set. |
Applications
| Server Platform Integrity | Industrial Control Secure Boot |
|---|---|
Use Scenario: Data center servers require hardware-rooted trust to verify firmware authenticity before OS load and attest runtime integrity to remote management consoles. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4620B acts as the root-of-trust anchor, executing TPM 1.2 commands to measure BIOS, bootloader, and hypervisor components into PCR registers. Use Value: Enables measured boot chain with cryptographic proof, preventing unauthorized firmware modification and enabling remote attestation via TCG-compliant protocols. | Use Scenario: Programmable logic controllers (PLCs) deployed in critical infrastructure must ensure firmware integrity and resist unauthorized reprogramming during field updates. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4620B validates digital signatures on firmware images prior to execution and stores secure update counters in its 2066-byte NV space. Use Value: Prevents malicious firmware injection by enforcing signature verification and maintaining immutable update history, meeting IEC 62443-3-3 security requirements. |
| Medical Device Authentication | Network Appliance Key Management |
Use Scenario: Diagnostic imaging systems require FDA-compliant device authentication to restrict access to proprietary algorithms and prevent unauthorized service tools. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4620B stores manufacturer-signed certificates and performs challenge-response authentication during service tool handshake. Use Value: Enforces hardware-bound identity binding and prevents cloning or counterfeit service modules using FIPS-certified cryptographic primitives. | Use Scenario: Enterprise firewalls and SD-WAN appliances need secure key storage for TLS certificate handling, IPsec SA establishment, and zero-trust identity provisioning. IC Role / Device Role / Timing Role: AT97SC3205T-G3M4620B generates and protects RSA private keys used for TLS mutual authentication and IPsec IKEv2 key exchange. Use Value: Offloads PKI operations from host CPU and isolates private keys from OS memory - mitigates cold-boot and side-channel attacks targeting key material. |
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 |
|---|---|---|---|
| Infineon SLB9665TT2.0 | TPM 2.0 compliant; supports SHA-256 and ECC; higher performance crypto engine; 3.3V I²C interface; same industrial temp range. | Enables migration to TCG TPM 2.0 specification with enhanced algorithm support and improved command throughput. | Select for new designs requiring forward-compatible TPM 2.0 features and broader cryptographic agility. |
| Nuvoton NPCT750AAAXX | TPM 1.2 compliant; integrated voltage supervisor and watchdog; 3.3V I²C; industrial temp; smaller 5×5mm QFN package. | Better suited for space-constrained industrial gateways where board area is limited but TPM 1.2 compliance remains mandatory. | Select when footprint reduction and integrated supervision are prioritized over extended NV storage (2066B vs. 1024B). |
Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT750AAAXX, the AT97SC3205T-G3M4620B offers larger user NV storage (2066B), FIPS-140-2 certification covering RNG/AES/SHA/RSA, and GPIO-Express-00 for persistent tamper-state logging - making it optimal for legacy TPM 1.2 deployments requiring robust field-deployable security logging.
Availability
AT97SC3205T-G3M4620B is available at Aetrix Electronics and suitable for server platform integrity, industrial control secure boot, medical device authentication, and network appliance key management requiring stable component supply and long-term lifecycle support.
Supply support for AT97SC3205T-G3M4620B 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 product line delivers certified TPM 1.2 functionality for embedded systems needing hardware-rooted trust, secure key storage, and FIPS-140-2 validated crypto engines - targeting industrial, medical, and networking applications with stringent security certification needs.
FAQ
What is the primary function of the AT97SC3205T-G3M4620B in a system?
The AT97SC3205T-G3M4620B serves as a hardware-rooted Trusted Platform Module (TPM) 1.2 security controller. It provides cryptographic key generation, secure storage of RSA keys and user data, platform integrity measurement, and authenticated boot enforcement. Its role is to establish and maintain a chain of trust from power-on through OS initialization, ensuring firmware and software authenticity in embedded and server platforms.
Does the AT97SC3205T-G3M4620B support both commercial and industrial temperature ranges?
Yes, the AT97SC3205T-G3M4620B is qualified for industrial temperature operation from −40°C to +85°C. This rating is explicitly documented in the Atmel-8883AS datasheet summary and applies to both the 28-pin TSSOP and 32-pad QFN package variants, including the AT97SC3205T-G3M4620B ordering code.
How does the AT97SC3205T-G3M4620B handle low-power states?
The AT97SC3205T-G3M4620B automatically enters low-power sleep when idle. Recovery requires pulsing both TWI_Wakeup# pins low in sequence, as defined in the Atmel TPM Specific Commands document. No host firmware action beyond this pin toggle is needed - the device manages internal state retention and clock gating autonomously.
What certifications apply to the AT97SC3205T-G3M4620B's cryptographic modules?
The AT97SC3205T-G3M4620B holds FIPS-140-2 certification covering its Random Number Generator (RNG), HMAC, AES, SHA, and RSA cryptographic engines. This certification is explicitly stated in the Atmel datasheet summary and confirms validation against NIST SP 800-22 statistical tests and implementation-level security requirements.
Can the AT97SC3205T-G3M4620B be used as a direct replacement for other TPM 1.2 modules?
No documented pin-to-pin or drop-in compatibility exists between the AT97SC3205T-G3M4620B and other vendor TPM modules. While functionally comparable, differences in I²C timing margins, reset behavior, GPIO mapping, and NV storage layout require hardware and firmware validation. Migration must follow full qualification per application requirements.
AT97SC3205T-G3M4620B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-G3M4620B FAQ
1.How can I place an order for AT97SC3205T-G3M4620B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-G3M4620B 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-G3M4620B reliable?
The price and inventory of AT97SC3205T-G3M4620B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-G3M4620B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-G3M4620B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-G3M4620B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-G3M4620B?
AT97SC3205T-G3M4620B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-G3M4620B 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-G3M4620B?
For technical support, including AT97SC3205T-G3M4620B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-G3M4620B requirements.
6.How does Aetrix verify that AT97SC3205T-G3M4620B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-G3M4620B 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-G3M4620B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-G3M4620B?
All AT97SC3205T-G3M4620B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-G3M4620B, 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-G3M4620B part is unused and in its original packaging.
Return procedure for AT97SC3205T-G3M4620B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-G3M4620B 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…
