DeepCover Secure Authenticator with SHA-256 Coprocessor and 1-Wire Master Function

Advanced Physical Security Protects System Secret, Offloads Host SHA-256 Computing

Please check latest availability status for a specific part variant.


DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible. The DeepCover Secure Authenticator (DS24L65) is a SHA-256 coprocessor with built-in 1-Wire® master that provides the SHA-256 and memory functionality required by a host system to communicate with and operate a 1-Wire SHA-256 slave. In addition, it performs protocol conversion between the I²C master and any attached 1-Wire SHA-256 slaves. For 1-Wire line driving, internal user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds. The 1-Wire line can be powered down under software control. Strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs. When not in use, the DS24L65 can be put in sleep mode where power consumption is minimal.

A DS24L65 evaluation board is included in each of the authenticator evaluation kits below.

DS24L65: Typical Application Circuit DS24L65: Typical Application Circuit Enlarge+

Key Features

  • SHA-256 Engine to Operate a Symmetric-Key-Based Bidirectional Secure Authentication Model
  • Two 32-Byte Pages of User EEPROM with Multiple Programmable Protection Options
  • 1-Wire Master Port with Selectable Active or Passive 1-Wire Pullup
  • Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
  • 1-Wire Port Can Be Powered Down Under Software Control
  • I²C Operating (Pullup) Voltage: 1.8V ±5%
  • ±8kV ESD Protection on IO to GND (JESD22-A114 HBM, Typical)
  • Operating Range: 1.8V ±5%, -40°C to +85°C
  • 6-Pin TSOC Package


  • Authentication of Consumables
  • Secure Feature Control

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.

DS28EL25EVKIT: Evaluation System for the DS28EL25 and DS24L65
DS28EL22EVKIT: Evaluation System for the DS28EL22 and DS24L65
DS28EL15EVKIT: Evaluation System for the DS28EL15 and DS24L65
Product Reliability Reports: DS24L65.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

1-Wire Dual-Port Link

  • Two-Contact Solution Enables Advance TWS Features
  • Full Range of Capabilities for Earbud and Charging Case Detection
  • Minimalist Dual 1-Wire Interface Reduces Cost and Complexity

1-Wire® to I2C/SPI Bridge with Command Sequencer

  • Operate Remote I2C or SPI Devices Using Single-Contact 1-Wire Interface
  • No External Power Required
  • Flexible 1-Wire and I2C/SPI Master Operational Modes
  • Easy to Integrate

I²C Low-Voltage SHA-3 Authenticator

  • Robust Countermeasures Protect Against Security Attacks
  • Efficient Secure Hash Algorithm Authenticates Peripherals
  • Supplemental Features Enable Easy Integration into End Applications