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CryptoAuthentication, 2V to 5.5V, SOT-23-3

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Product Overview

  • ATSHA204A crypto element device
  • Crypto element with protected hardware-based key storage
  • Secure symmetric authentication device host and client operations
  • Superior SHA-256 hash algorithm with MAC and HMAC options
  • Best-in-class, 256-bit key length, storage for up to 16 Keys
  • Guaranteed unique 72-bit serial number
  • Internal, high-quality Random Number Generator (RNG)
  • 4.5Kb EEPROM for keys and data, 512 bit OTP (One Time Programmable) bits for fixed information
  • UART-compatible high-speed, single-wire interface, 1MHz I2C interface
  • Sleep current<150nA


Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

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Technical Documents (2)

CAD Downloads


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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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Packaging type Re-Reel
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Cut Tape :2851689 Check stock

Back order today stock arriving week commencing 21/04/23

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£0.777 ( ex VAT  ) £0.9324 ( inc VAT )

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100 (Cut Tape 2851689) x 0.777 = £77.70
100 (Cut Tape 2851689) x 0.9324 = £93.24
Total Price: £77.70 ( ex VAT  )
Total Price: £93.24 ( inc VAT )
For the quantity ordered, some or all of your order will be placed on backorder. See 'Check stock and lead times' for details.
100 (Re-reel 2851689RL) x 0.777 = £77.70
100 (Re-reel 2851689RL) x 0.9324 = £93.24
Total Price: £77.70 ( ex VAT  )
Total Price: £93.24 ( inc VAT )
For the quantity ordered, some or all of your order will be placed on backorder. See 'Check stock and lead times' for details.
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