IAX4.5Kb Extended Length Memory Tokens

The IAX4.5Kb CryptoAuthentication™ extended length memory token utilizes Microchip’s ATSHA204A CryptoAuthentication™ IC, enabling embedded applications, like:

• Secure storage/transfer of keys, certificates, passwords
• Secure credential with unique, read-only serial number
• Crypto Ignition Key (CIK)
• Device authentication (anti-counterfeit) with countdown limit use

The token’s internal IC contains a 512-byte (4096-bit) Data Zone of EEPROM memory that is divided into 16 slots. Each 32-byte (256-bit) slot can be configured for read-only or read/write access in either clear or encrypted modes. There is also a 64-byte One Time Programmable (OTP) Zone. Data may be written until the zone is locked. The OTP zone can also be used to track usage, where once a bit has been flipped it cannot be changed back.The IC also includes a unique 9-byte (72-bit) non-changeable serial number. The ATSHA204A also features a random number generator, a secure challenge-response protocol for host/memory token authentication and a SHA-256 hash algorithm for data encryption. The IC also incorporates security features to detect tampering and thwart attacks.

Customization options for the tokens include color matching and custom logos.

CryptoAuthentication is a trademark of Microchip Technology Incorporated in the U.S.A. and other countries and is used under license.

Part Number

611-0233-000A (Black)
611-0233-002A (Red)
611-0233-004A (Yellow)
611-0233-005A (Green)
611-0233-006A (Blue)
611-0233-008A (Gray)

Memory Capacity

4.5 Kb (4,608 bits)



Memory Technology



2.0 to 5.5 V

ESD Protection

15 kV (air), 8 kV (contact) per MIL-STD-461G CS118

Read Cycles


Write/Erase Cycles

100,000 min.

Data Life (Storage)

10 years min. at 55˚C

Contact Life

10,000 cycles min.

Operational Temperature

-40˚C to +85˚C

Storage Temperature

-40˚C to +100˚C

Used With

All SlimLine Receptacles (SRxxxx)


RoHS Compliant

Other Features

Redundant contacts.

WARNING: California's Proposition 65

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