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Microchip Technology ATECC108-SSHDA-B
- Part No.:
- ATECC108-SSHDA-B
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC AUTHENTICATION CHIP 8SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
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- Shipping:
Product Details
ATECC108-SSHDA-B - I2C Cryptographic Authentication Device
Microchip ATECC108-SSHDA-B is an 8-SOIC hardware authentication IC with an I2C interface, elliptic-curve signature operations, SHA-256 functions and protected key storage.
The exact ordering code, interface, package and technical features are checked against the manufacturer-hosted Atmel ATECC108 Summary Datasheet, revision 8873BS. The manufacturer marks ATECC108 not recommended for new designs.
Overview
ATECC108 is a CryptoAuthentication device for identity verification, anti-clone checks and protected cryptographic operations. It combines elliptic-curve signing and verification, SHA-256 challenge-response support, an internal random-number generator and nonvolatile storage for keys and configuration. This exact -SSHDA-B option uses the I2C interface and is supplied in bulk tubes, not on tape and reel.
Key Advantages
Hardware-assisted signatures
Elliptic-curve operations support device authentication without exposing a stored private key to the host.
Protected key storage
Configuration and access restrictions help protect secrets and control key use.
Individual device identity
A guaranteed unique 72-bit serial number supports per-unit identification.
I2C host connection
The -SSHDA-B interface option uses SDA and SCL, allowing integration with compatible host controllers.
Feature Summary
ECC engine
ECDSA signing and verification with support for NIST P256, B283 and K283 curves as described in the summary datasheet.
Hash functions
SHA-256 and an HMAC option support authenticated challenge-response workflows.
Memory
8.5 Kbits of EEPROM and 512 one-time-programmable bits for keys, fixed information and application data.
Random generation
An internal random-number generator supports cryptographic protocol operations.
Package & Footprint
Registered package: 8-SOIC (0.154 in, 3.90 mm nominal width). The manufacturer's 8S1 drawing identifies an eight-lead, 0.150-inch-wide-body JEDEC SOIC with 3.81 to 3.99 mm body width, 4.80 to 5.05 mm body length and 1.27 mm lead pitch. The -B suffix denotes bulk-in-tubes delivery.
- Use the manufacturer 8S1 mechanical drawing for the land pattern.
- Check pin-one orientation and the no-connect pins before layout release.
- Follow the datasheet's host-interface and supply-decoupling requirements.
The registered package JPG is pending online availability. Use the dimensioned manufacturer drawing for final PCB design.
Pin Functions
The SOIC top-view drawing for the I2C option identifies the following leads.
The single-wire ordering options use a different interface configuration; do not infer interchangeability from the common SOIC outline.
Key Specifications
| Exact ordering code | ATECC108-SSHDA-B |
|---|---|
| Function | Hardware cryptographic authentication and protected key storage |
| Interface option | I2C, SDA and SCL |
| I2C speed | Up to 1 MHz as specified in the manufacturer summary |
| Supply range | 2.0 to 5.5 V |
| Operating temperature | -40 to +85 °C |
| Sleep current | Less than 150 nA per manufacturer feature summary |
| Identity | Guaranteed unique 72-bit serial number |
| EEPROM | 8.5 Kbits |
| OTP region | 512 bits |
| Key storage | Up to 16 keys |
| Cryptographic functions | ECDSA, SHA-256 and HMAC option |
| Package and delivery | 8S1 SOIC, bulk in tubes |
Feature-level limits and protocol capabilities must be interpreted with the complete device documentation and the selected configuration.
Replacement Considerations
Atmel identifies ATECC108A as the successor family. A replacement assessment must confirm the exact I2C option, package, pin functions, key-slot configuration, command behavior, provisioning process, certificate handling, host firmware and lifecycle. A successor-family designation does not by itself establish a drop-in replacement for a programmed security device. No unverified internal product link is provided.
Manufacturer Information
The catalog identifies Microchip Technology. The manufacturer-hosted Atmel ATECC108 Summary Datasheet, revision 8873BS, explicitly lists ATECC108-SSHDA-B as the SOIC, bulk-in-tubes, I2C ordering option. The summary marks the original ATECC108 not recommended for new designs. The complete technical document is controlled separately; obtain it from the manufacturer when detailed configuration or security implementation decisions require it.
Applications
Accessory authentication
Validate compatible replaceable modules, consumables and daughter cards.
Secure boot checks
Support host-controlled verification of firmware or stored software images.
Protected key operations
Keep private-key operations within a dedicated cryptographic device.
Connected systems
Provide identity and authentication functions for networked embedded equipment.
Quality & Authenticity
Match the full -SSHDA-B code, SOIC body, tube labeling, lot identifiers and traceability to procurement records. Confirm the intended key and configuration state through an authorized provisioning and test process. A package label alone does not establish cryptographic authenticity, and this description does not certify any particular lot.
FAQ
Does this ordering code use I2C?
Yes. The manufacturer ordering table assigns the -SSHDA-B code to the I2C interface.
Is it supplied on a reel?
No. The -B code is listed as SOIC bulk in tubes.
Can ATECC108A be substituted without review?
No. Compare the exact configuration, commands, provisioning, host software and lifecycle before making a change.
Engineering Notice
Use current manufacturer-controlled documentation for final design decisions. Verify I2C electrical design, 8S1 mechanical fit, security configuration, key handling, firmware integration and lifecycle. The package JPG is not a substitute for the manufacturer's dimensioned drawing.
ATECC108-SSHDA-B Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoAuthentication™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Authentication Chip
- Applications:
- Networking and Communications
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Grade:
- -
- Qualification:
- -
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