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ATECC108A Summary

(文件大小: 608KB, 14 页数, 修订版 B, 更新时间: 01/2016)

Secure authentication and product validation device datasheet summary. The complete document is available under NDA. For more information, please contact your local Atmel sales office.


The ATECC108A provides a full turnkey Elliptic Curve Digital Signature Algorithm (ECDSA) engine using key sizes of 256 or 283 bits - appropriate for modern security environments without the long computation delay typical of software solutions.

Access to the device is through a standard I²C Interface at speeds up to 1Mb/sec. It is compatible with standard Serial EEPROM I²C Interface specifications. The device also supports a Single-Wire Interface that can reduce the number of GPIOs required on the system processor or reduce the number of pins on connectors.

If the Single-Wire Interface is enabled, the remaining pin is available for use as a GPIO which can be asserted or read under program control. It can also be connected to an authorization event for a specified key to provide an external indication of proper authentication or to enable a hardware component of the system.

The ATECC108A can generate high-quality Federal Information Processing Standards (FIPS) random numbers and employ them for any purpose, including usage as part of the device’s crypto protocols. Because each random number is guaranteed to be unique from all numbers ever generated on this or any other device, their inclusion in the protocol calculation ensures that replay attacks (re-transmitting a previously successful transaction) always fails.


  • Crypto Element Devices with Secure Hardware-based Key Storage
  • Performs High-Speed Public Key (PKI) Algorithms: ECDSA
  • NIST Standard P256, B283, and K283 Elliptic Curve Support
  • SHA-256 Hash Algorithm with HMAC Option
  • 256-bit and 283-bit Key Length
  • Guaranteed Unique 72-bit Serial Number
  • Internal High-quality FIPS Random Number Generator (RNG)
  • 10Kb EEPROM Memory for Keys, Certificates, and Data
  • Complete Client and Host Functionality in Same Device
  • Storage for up to 16 Keys
  • Multiple Options for Consumption Logging and One Time Write Information
  • Intrusion Latch for External Tamper Switch or Power-on Chip Enablement
  • 2.0V to 5.5V Supply Voltage Range
  • 1.8V to 5.5V IO levels
  • <150nA Sleep Current
  • 8-pad UDFN, 8-lead SOIC, and 3-lead CONTACT Packages



Interface Type:

Single-wire; I2C



Operating Voltage (Vcc):

2.0 to 5.5

Algorithm Type:


Algorithm Type:


Key Size:

256 or 283



Standby Typical (uA):


Operating Current Typical (mA):


Temp. Range (deg C):

-40 to 85


订购码 封装 操作范围 载体类型 样品 Atmel 商店可用性1 单价2 网上购买
ATECC108A-MAHCZ-T UDFN 8MA2 8 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-MAHDA-T UDFN 8MA2 8 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-RBHCZ-T CONTACT 3RB 3 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-SSHCZ-B SOIC 8S1 8 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-SSHCZ-T SOIC 8S1 8 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-SSHDA-B SOIC 8S1 8 Industrial (A) (-40°C to 85°C) 请求
ATECC108A-SSHDA-T SOIC 8S1 8 Industrial (A) (-40°C to 85°C) 请求

1Backlog orders can be placed for items currently not available.
2Suggested retail price per unit for budgetary use only.