Click here to ask about the production status of specific part numbers. DS2477 DeepCover Secure SHA-3 Coprocessor with ChipDNA PUF Protection General Description Benefits and Features 2 The DS2477 secure I C coprocessor with built-in 1-Wire Robust Countermeasures Protect Against Security master combines FIPS202-compliant secure hash algo- Attacks rithm (SHA-3) challenge and response authentication with Patented Physically Unclonable Function Secures Maxims patented ChipDNA feature, a physically unclon- Device Data able technology (PUF) to provide a cost-effective solution Actively Monitored Die Shield Detects and Reacts with the ultimate protection against security attacks. The to Intrusion Attempts ChipDNA implementation utilizes the random variation of All Stored Data Cryptographically Protected from semiconductor device characteristics that naturally occur Discovery during wafer fabrication. The ChipDNA circuit generates a Efficient Secure Hash Algorithm Authenticates and unique output value that is repeatable over time, tempera- Manages Peripherals ture, and operating voltage. Attempts to probe or observe FIPS 202-Compliant SHA-3 Algorithm for ChipDNA operation modifies the underlying circuit char- Bidirectional Authentication acteristics thus preventing discovery of the unique value FIPS 198-Compliant Keyed-Hash Message used by the chip cryptographic functions. The DS2477 uti- Authentication Code (HMAC) lizes the ChipDNA output as key content to cryptograph- TRNG with NIST SP 800-90B Compliant Entropy ically secure all device-stored data. With ChipDNA ca- Source pability, the device provides a core set of cryptographic Supplemental Features Enable Easy Integration into tools derived from integrated blocks including a SHA-3 en- End Applications gine, a FIPS/NIST compliant true random number gen- 2Kb of EEPROM for User Data, Key, and Control erator (TRNG), 2Kb of secured EEPROM, and a unique Registers 64-bit ROM identification number (ROM ID). The unique One Open-Drain GPIO Pin ROM ID is used as a fundamental input parameter for Unique and Unalterable Factory-Programmed cryptographic operations and serves as an electronic se- 64-Bit Identification Number (ROM ID) rial number within the application. The DS2477 provides Large 1-Wire Block Buffer (126 Bytes) for Efficient the SHA-3 and memory functionality required by a host Data Transfer system to communicate with and operate a 1-Wire SHA-3 1-Wire Standard and Overdrive Timing slave. In addition, it performs protocol conversion between Communication Speeds 2 the I C master and any attached 1-Wire SHA-3 slaves. 2 I C Communication, up to 1MHz For 1-Wire line driving, internal user-adjustable timers re- Operating Range: 3.3V 10%, -40C to +85C lieve the system host processor from generating time-criti- 6-Pin TDFN-EP Package (3mm x 3mm) cal 1-Wire waveforms, supporting both standard and over- drive 1-Wire communication speeds. The 1-Wire line can be powered down under software control. Strong pullup features support 1-Wire power delivery for commands that Request DS2477 require higher current consumption. Security User Guide Applications Authentication of Medical Sensors and Tools Secure Management of Limited Use Consumables Ordering Information appears at end of data sheet. IoT Node Authentication Peripheral Authentication Reference Design License Management Printer Cartridge Identification and Authentication 1-Wire is a registered trademark and ChipDNA is a trademark of Maxim Integrated Products, Inc. 19-100402 Rev 2 11/20DS2477 DeepCover Secure SHA-3 Coprocessor with ChipDNA PUF Protection Typical Application Circuit VCC R P3 V CC R R P1 P2 GPIO IO VCC DS2477DS2477 2 I C IO SDA PORT SCL C GND IO IO IO GND GPIO IO GPIO IO GPIO IO DS28E50DS28E50 DS28E50DS28E50 DS28E50DS28E50 C C C EXT EXT EXT C C C X X X GND GND GND www.maximintegrated.com Maxim Integrated 2