The DS28E38 is an ECDSA public key-based secure authenticator that incorporates Maxim’s patented ChipDNA™ PUF technology. ChipDNA technology involves a physically unclonable function (PUF) that enables the DS28E38 to deliver cost-effective protection against invasive physical attacks. Using the random variation of semiconductor device characteristics that naturally occur during wafer fabrication, the ChipDNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage. Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, preventing discovery of the unique value used by the chip cryptographic functions. The DS28E38 utilizes the ChipDNA output as key content to cryptographically secure all device stored data and optionally, under user control, as the private key for the ECDSA signing operation. With ChipDNA capability, the device provides a core set of cryptographic tools derived from integrated blocks including an asymmetric (ECC-P256) hardware engine, a FIPS/NIST-compliant true random number generator (TRNG), 2Kb of secured EEPROM, a decrement-only counter and a unique 64-bit ROM identification number (ROM ID). The ECC public/ private key capabilities operate from the NIST-defined P-256 curve to provide a FIPS 186-compliant ECDSA signature generation function. The unique ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application. The DS28E38 communicates over the single-contact 1-Wire® bus at both standard and overdrive speeds. The communication follows the 1-Wire protocol with the ROM ID acting as node address in the case of a multidevice 1-Wire network.
|Read white paper ›||Read white paper ›|
|How to Setup the DS28E38 Evaluation Kit and Perform ECDSA Authentication||ChipDNA–Defend Your IoT Designs from Hackers|
Also see: ChipDNA Technology ›
|Part Number||Crypto Engine||Applications||Memory Type||Memory Size||Bus Type||VSUPPLY|
|Deep Cover||Oper. Temp.|
|EEPROM||2K x 1||1-Wire||2.97 to 3.63||Yes||-40 to +85|
|See All Secure Authenticators (23)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C|
|User Guide||6575||MAXREFDES168# User Guide|
|User Guide||6468||DS28E38 Security User Guide|
|App Note||4717||Injection Molding an IC into a Connector or Consumable Item|
|Tutorial||4702||Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables|