ATECC608B-TFLXTLSU

Microchip ATECC608B-TFLXTLSU is an 8‑pin CryptoAuthentication secure element in the TFLX package. It provides hardware-based key storage and crypto acceleration to secure devices without exposing private keys to the host MCU.
Key features
- ECC and crypto: P-256 keys, ECDSA signing/verification, ECDH, SHA-256, HMAC-SHA-256, and an AES-128-CTR engine.
- Secure storage: private keys and certificates stored in tamper-resistant key slots; one‑time programmable options; device unique ID.
- Randomness and attestation: true RNG and cryptographic attestation capabilities.
- Interface and footprint: I2C serial interface, small 8‑pin package, suitable for low-power, space-constrained designs.
Security and use cases
- Keys never leave the device; cryptographic operations occur inside the IC, protecting keys during TLS, code signing, and authentication workflows.
- Common applications: IoT device identity, secure boot, firmware update protection, TLS client authentication, and certificate management.
Software and integration
- Supported by Microchip CryptoAuthLib for easy integration; works with TLS stacks to accelerate crypto operations and key management.
Note: TLSU suffix relates to packaging/temperature options; consult the datasheet for exact specifics.

Here are the key features of ATECC608B-TFLXTLSU (CryptoAuthentication device):
- Secure element with hardware CryptoAuthentication for confidential key storage; private keys never leave the device.
- ECC cryptography: supports P-256 for ECDSA signing/verification and ECDH key agreement.
- TLS offload: hardware-accelerated TLS cryptography and key storage to support TLS client/server operations.
- Symmetric crypto: AES-128 engine for MAC/PRF operations.
- Hash/RNG: SHA-256 engine and true random number generator for nonces and crypto operations.
- Flexible storage: secure key/data storage with multiple slots and zones; OTP and protected areas with configurable lockdown.
- Interfaces: I2C serial interface for host communication (simple integration, wide-support libraries).
- Robust security: tamper-resistant design, anti-cloning protections and secure key lifecycle (generate, store, use inside device).
- Low power, small form factor suitable for IoT devices and embedded systems.
Common uses: device identity and attestation, secure boot and firmware signing, TLS client authentication, and cryptographic key management in constrained environments.

The ATECC608B-TFLXTLSU is supplied in an 8‑lead SOIC (SOIC‑8) surface-mount package (tape-and-reel).

The ATECC608B-TFLXTLSU is an 8-pin cryptographic coprocessor (UDFN/µDFN-style package). Pins provide: VCC (power), GND (ground), SDA (I2C data), SCL (I2C clock), a configurable single‑wire/IO pin (SWI/GPIO), RESET, WAKE (or optional GPIO), and one or more NC/EP (exposed pad for ground/thermal). Several pins are multiplexed for I2C, SWI and GPIO functions—refer to the ATECC608B datasheet for the exact pin numbering and alternate-function table.

Manufacturer: Microchip Technology Inc.
What kind of company: Microchip is an American publicly traded semiconductor company that designs and manufactures microcontrollers, analog and mixed‑signal ICs, memory, and secure/authentication devices (like the ATECC family), plus development tools and embedded control solutions.

Application areas of ATECC608B-TFLXTLSU include:
- Secure device identity and authentication in IoT
- Secure boot and firmware updates
- Secure key management and PKI
- TLS/DTLS authentication for cloud connectivity
- Digital signatures and certificate handling
- Anti-counterfeiting and asset tracking
- Encrypted storage and data integrity in consumer, industrial, and medical devices

Equivalent products include: Microchip ATECC508A / ATECC608A (same family), NXP A71CH and EdgeLock SE050, Infineon OPTIGA Trust X, STMicroelectronics STSAFE‑A110 (A100 family), and Maxim/Analog Devices DS28E38 (DeepCover).