My Inquiry
My Account
Microchip Technology AT97SC3205T-U3A1610B
- Part No.:
- AT97SC3205T-U3A1610B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3205T-U3A1610B.pdf
- Description:
- MEM FF IND I2C TPM 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,942
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT97SC3205T-U3A1610B from Microchip (acquired 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-byte NV user storage. It operates at 3.3V with I²C interface up to 400kHz and targets secure boot, platform integrity verification, and key management in embedded computing systems.
For engineers reviewing the AT97SC3205T-U3A1610B datasheet, AT97SC3205T-U3A1610B pinout, AT97SC3205T-U3A1610B application, or AT97SC3205T-U3A1610B equivalent, this page delivers verified electrical parameters, validated I²C timing constraints, confirmed package mapping to 32-pad QFN, exact pin roles per TSSOP/QFN variants, and real-world TPM deployment considerations for industrial-grade embedded security design.
Technical Context
The AT97SC3205T-U3A1610B implements the full TCG TPM 1.2 stack in hardware, including command parsing, cryptographic acceleration, and secure non-volatile key storage. Its AVR CPU executes firmware that enforces strict physical and logical security boundaries between host and TPM domains.
It supports dual I²C modes (100kHz standard / 400kHz fast), requires precise SM_DAT/SM_CLK pull-up values (800Ω and 1.5kΩ respectively), and enters low-power sleep via TPM_DeepSleep command with TWI_Wakeup# recovery. The device integrates tamper-detection circuitry via XTAMPER functionality on TestBI/GPIO/XTAMPER pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TPM Specification | TCG TPM 1.2 compliant - ensures interoperability with BIOS/firmware stacks requiring standardized trusted boot and attestation. |
| I²C Interface Speed | Up to 400kHz Fast Mode - enables rapid command/response exchange with host processor; requires 800Ω pull-up on SM_DAT and 1.5kΩ on SM_CLK for stable operation. |
| Supply Voltage | 3.3V ±5% - mandates tight decoupling: 2200–4700pF capacitors within 5mm of each VCC–GND pair plus 0.1μF near VCC node. |
| Crypto Certification | FIPS-140-2 Level 2 certified - validates RNG, HMAC, AES, SHA, and RSA engines meet NIST security requirements for production deployment. |
| NV Storage Capacity | 2066 bytes user-defined data - provides persistent space for credentials, policy settings, or sealed keys without consuming host memory or external EEPROM. |
| Operating Temperature | -40°C to +85°C industrial range - supports deployment in ruggedized edge gateways, industrial controllers, and network infrastructure equipment. |
| Package Options | 32-pad QFN (4.0×4.0×0.90mm, 0.40mm pitch) - surface-mount compatible with automated assembly; center pad internally tied to GND. |
Pinout & Package
AT97SC3205T-U3A1610B is packaged in a 32-pad Very Thin QFN (32M3) with 0.40mm pitch and 4.0×4.0mm body. The exposed thermal pad is internally connected to GND and may be left floating or soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3V main supply; requires dedicated decoupling per datasheet layout rules to prevent noise-induced TPM failure. |
| GND | Ground reference | System ground return; center pad is electrically tied to GND and serves as primary thermal path. |
| SM_DAT | I²C bidirectional data line | Open-drain I²C data bus; must use 800Ω pull-up for reliable 400kHz operation; sensitive to trace length and capacitance. |
| SM_CLK | I²C clock input | Input-only clock signal; 1.5kΩ pull-up recommended; 50% duty cycle improves communication stability at high speed. |
| LRESET# | Active-low reset input | Asynchronous hard reset; minimum 2μs pulse width required; must remain asserted until VCC stabilizes after power-on. |
| PP/GPIO | Physical presence indicator | Hardware-enforced physical presence detection; active-high signal used to authorize privileged TPM operations like clearing ownership. |
| TestBI/GPIO/XTAMPER | Multi-function terminal | Configurable as GPIO, XTAMPER (external tamper sensor), or test input; tie to GND if unused to avoid floating state. |
| TWI_Wakeup# | Low-power wake trigger | Two-pin wakeup sequence required to exit deep sleep mode initiated by TPM_DeepSleep command. |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip TPM 1.2 implementation | Eliminates external MCU, crypto co-processor, and EEPROM - reduces BOM count, board area, and firmware integration complexity. |
| Hardware asymmetric crypto engine | Accelerates RSA key generation and signing operations in silicon - prevents side-channel leakage and avoids software-based timing attacks. |
| FIPS-140-2 Level 2 certification | Validates RNG entropy quality, AES/SHA execution integrity, and physical security mechanisms - satisfies compliance requirements for government and enterprise deployments. |
| Internal EEPROM for RSA keys | Stores multiple private keys securely with hardware-enforced access control - no risk of extraction via memory dump or debug interface. |
| GPIO-Express-00 support | Provides dedicated NV-indexed GPIO mapped to TPM_NV_INDEX_GPIO_00 - enables secure status reporting or hardware handshake without host OS involvement. |
Applications
| Secure Boot Verification | Platform Integrity Attestation |
|---|---|
Use Scenario: Verifying firmware hash authenticity during system startup before loading OS kernel. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor; measures BIOS, bootloader, and early kernel components into Platform Configuration Registers (PCRs). Use Value: Prevents unauthorized firmware modification by cryptographically binding boot sequence to hardware identity using AT97SC3205T-U3A1610B's FIPS-certified RSA engine and secure NV storage. | Use Scenario: Reporting runtime system state to remote management server for compliance auditing. IC Role / Device Role / Timing Role: TPM generates signed PCR quotes containing current measurement values; uses hardware RNG for nonce generation. Use Value: Enables verifiable proof of unmodified software stack using AT97SC3205T-U3A1610B's certified SHA-1/SHA-256 engines and secure signature generation. |
| Hardware-Bound Key Management | Physical Presence Enforcement |
Use Scenario: Storing and using encryption keys tied to specific hardware for disk encryption or TLS certificate protection. IC Role / Device Role / Timing Role: TPM seals keys to PCR values and decrypts only when platform state matches expected measurements. Use Value: Ensures keys remain inaccessible if firmware or OS is altered, leveraging AT97SC3205T-U3A1610B's internal EEPROM and hardware-enforced key binding logic. | Use Scenario: Requiring physical button press to authorize TPM owner clear or dictionary attack lockout reset. IC Role / Device Role / Timing Role: PP/GPIO pin detects hardware switch closure; triggers TPM to validate physical presence before executing privileged commands. Use Value: Mitigates remote privilege escalation by enforcing human-in-the-loop authorization using AT97SC3205T-U3A1610B's dedicated PP/GPIO input with internal pull-down resistor. |
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 | Same TPM 1.2 compliance, 32-pin QFN, 3.3V supply, but uses SPI interface instead of I²C; lacks AVR CPU - relies on host for command dispatch. | Requires SPI-capable host controller; not drop-in I²C replacement; different driver stack integration effort. | Select when host has SPI bandwidth headroom and prefers vendor-agnostic TPM firmware abstraction layer. |
| NXP PCF5122A | TPM 2.0 compliant, 32-pin QFN, 3.3V, I²C interface, but includes enhanced algorithms (ECC, SHA-256 native), larger NV space (3.5KB), and updated physical security features. | Supports modern TCG standards and post-quantum readiness planning; requires TPM 2.0-aware BIOS/firmware stack. | Select for new designs targeting long-term compatibility with evolving security standards beyond TPM 1.2. |
Compared with Infineon SLB9665TT2.0 and NXP PCF5122A, the AT97SC3205T-U3A1610B offers proven I²C-based TPM 1.2 integration with on-chip AVR processing, making it optimal for legacy-compatible industrial systems where minimal host-side firmware changes and deterministic I²C timing are critical.
Availability
AT97SC3205T-U3A1610B is available at Aetrix Electronics and suitable for secure boot verification, platform integrity attestation, and hardware-bound key management requiring stable component supply across industrial temperature ranges and long-lifecycle embedded programs.
Supply support for AT97SC3205T-U3A1610B 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 the AT97SC3205T series.
The AT97SC3205T-U3A1610B belongs to Atmel's Trusted Platform Module product line, designed specifically for embedding hardware-rooted trust into resource-constrained industrial and embedded systems without requiring external security co-processors.
FAQ
What is the primary interface protocol supported by the AT97SC3205T-U3A1610B?
The AT97SC3205T-U3A1610B supports only the I²C interface, operating in both Standard Mode (100kHz) and Fast Mode (400kHz). It does not support SPI or LPC interfaces. Proper pull-up resistor selection (800Ω on SM_DAT, 1.5kΩ on SM_CLK) is essential for stable 400kHz operation, and the AT97SC3205T-U3A1610B requires precise clock duty cycle control to maintain communication integrity under load.
Does the AT97SC3205T-U3A1610B include certified cryptographic modules?
Yes, the AT97SC3205T-U3A1610B is FIPS-140-2 Level 2 certified, covering its hardware random number generator (RNG), HMAC, AES, SHA, and RSA engines. This certification validates the implementation against NIST security requirements and confirms resistance to physical and logical attacks. The AT97SC3205T-U3A1610B's certification applies to the full device, including key storage and firmware execution environment.
What package type is used for the AT97SC3205T-U3A1610B variant?
The AT97SC3205T-U3A1610B uses the 32-pad Very Thin QFN (32M3) package measuring 4.0×4.0×0.90mm with 0.40mm pitch. Its exposed thermal pad is internally connected to GND, allowing direct PCB grounding for thermal and electrical stability. This package differs from the 28-pin TSSOP option and requires specific reflow profile validation due to fine-pitch layout constraints.
How does the AT97SC3205T-U3A1610B handle low-power operation?
The AT97SC3205T-U3A1610B enters low-power sleep automatically when idle and supports deep sleep mode triggered by the TPM_DeepSleep command. Recovery requires pulsing both TWI_Wakeup# pins low in sequence. The AT97SC3205T-U3A1610B does not require host intervention to manage sleep states, and its power consumption drops significantly without compromising secure state retention in internal EEPROM.
Can the AT97SC3205T-U3A1610B be used in automotive applications?
No, the AT97SC3205T-U3A1610B is not qualified for automotive applications. Atmel explicitly states in its disclaimer that products are not intended, authorized, or warranted for use in automotive environments unless specifically designated as automotive-grade. The AT97SC3205T-U3A1610B is rated for industrial (-40°C to +85°C) operation but lacks AEC-Q100 qualification, functional safety certification (ISO 26262), or automotive-specific reliability testing.
AT97SC3205T-U3A1610B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 28-TSSOP
AT97SC3205T-U3A1610B FAQ
1.How can I place an order for AT97SC3205T-U3A1610B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-U3A1610B 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-U3A1610B reliable?
The price and inventory of AT97SC3205T-U3A1610B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-U3A1610B is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-U3A1610B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-U3A1610B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-U3A1610B?
AT97SC3205T-U3A1610B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-U3A1610B 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-U3A1610B?
For technical support, including AT97SC3205T-U3A1610B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-U3A1610B requirements.
6.How does Aetrix verify that AT97SC3205T-U3A1610B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-U3A1610B 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-U3A1610B meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-U3A1610B?
All AT97SC3205T-U3A1610B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-U3A1610B, 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-U3A1610B part is unused and in its original packaging.
Return procedure for AT97SC3205T-U3A1610B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-U3A1610B 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…
