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Microchip Technology ATSHA204A-SSHDA-T

Part No.:
ATSHA204A-SSHDA-T
Manufacturer:
Microchip Technology
Category:
Specialized ICs
Package:
8-SOIC (0.154", 3.90mm Width)
Description:
IC AUTHENTICATION CHIP 8SOIC
Quantity:

Unit Price:$0

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Product Details

ATSHA204A-SSHDA-T - Microchip SHA-256 CryptoAuthentication™ IC (SOIC-8)

The ATSHA204A-SSHDA-T is a high-security CryptoAuthentication™ device from Microchip Technology. It provides advanced hardware-based security for SHA-256 hash algorithm applications, including message authentication code (MAC) and hash-based message authentication code (HMAC). Housed in a standard SOIC-8 package, it is designed for easy integration into industrial, consumer, and automotive systems to prevent cloning and unauthorized hardware tampering.

Product Focus: This version utilizes the SOIC-8 footprint, making it ideal for systems where ease of assembly and high-reliability soldering are prioritized.

 

Overview & Security Architecture

The ATSHA204A-SSHDA-T is an ideal solution for protecting intellectual property (IP) and ensuring brand integrity. It features a secure 4.5Kb EEPROM that can store keys, certificates, and non-volatile data, protected by sophisticated hardware-level anti-tamper mechanisms.

Unlike software-based security, the ATSHA204A executes the SHA-256 algorithm in a dedicated hardware zone, shielding sensitive keys from being read even if the host microcontroller is compromised. It supports a high-quality Random Number Generator (RNG) to ensure the uniqueness of every challenge-response session.

SEO Engineering Insight: The ATSHA204A-SSHDA-T is frequently specified for medical and industrial accessories where a standard SOIC-8 package is required for robust vibration resistance and simple visual inspection during QC.
 

About Microchip Technology

Microchip Technology Inc. is a leading provider of smart, connected, and secure embedded control solutions. Their hardware security portfolio, centered around the CryptoAuthentication™ brand, is the industry leader for root-of-trust implementations.

By providing low-cost, low-power, and easy-to-implement security ICs, Microchip enables developers to defend their systems against increasingly sophisticated cyber and physical threats.

 

Key Advantages

Hardware-Based SHA-256

Delivers ultra-secure message authentication that is immune to software-based eavesdropping and extraction.

Robust SOIC-8 Package

Standard leaded package simplifies PCB design and is highly resilient to thermal and mechanical stress.

Secure Key Storage

Protects up to 16 keys in an encrypted EEPROM zone that is physically shielded from probing.

Single-Wire & I2C Interfaces

Supports dual-interface options for maximum flexibility, requiring as few as one GPIO for operation.

 

Package & Mechanical Specs

The ATSHA204A-SSHDA-T is supplied in the widely used 8-lead SOIC (Small Outline Integrated Circuit) package.

Mechanical Details: 
  • Package Code: SS (8S1 standard).
  • Dimensions: 3.90 mm x 4.90 mm body.
  • Operating Temp: -40°C to +85°C.
  • Storage Temp: -65°C to +150°C.
 

Pin Functions

The 8-lead SOIC pinout is optimized for standard I2C or Single-Wire communication.

VCC / GND
Power supply (2.0V to 5.5V) and system ground.
SDA / SCL
Standard I2C data and clock lines.
SDA (SWI)
Pin used for Single-Wire Interface mode.
NC
No internal connection.
 

Technical Specifications

Manufacturer Microchip Technology
Algorithm SHA-256
Secure Storage 4.5 Kb EEPROM
Voltage Supply 2.0V to 5.5V
Interface I2C / Single-Wire
Package SOIC-8
Sleep Current < 150 nA
Unique ID 72-bit Serial Number
 

Equivalent & Replacement Guide

Replacement for the ATSHA204A-SSHDA-T should prioritize pin-compatibility and interface logic.

  • ATSHA204A-MAHDA-T: Functional equivalent in a smaller UDFN (2x3) package.
  • ATECC608B-SSHDA-T: Pin-compatible upgrade with ECC (Elliptic Curve Cryptography) support for enhanced cloud security.
  • DS28E15 (Analog Devices): Alternative authentication IC (Note: Different command set and interface logic).
Sourcing Tip: Ensure the "SSHDA" suffix is verified for correct I2C addressing and packaging before purchase.
 

Typical Application Fields

Medical Accessories

Medical Accessories

Validating the authenticity of disposable probes and surgical attachments to ensure patient safety.

Industrial Control

Industrial Control

Protecting PLC firmware and preventing uncertified modules from entering industrial networks.

Consumer Electronics

Consumer Electronics

Anti-cloning for batteries, cables, and smart home peripherals.

Network Equipment

Network Equipment

Providing hardware root-of-trust for routers, switches, and edge computing gateways.

 

Quality & Authenticity

  • Tamper Evidence: Integrated active shields and environmental sensors protect internal data.
  • FIPS-Standard Support: High-quality RNG compliant with FIPS SP800-90A/B/C.
  • Authorized Distribution: We provide full Lot Date Code (LDC) traceability for all Microchip security components.
 

Technical FAQ

Is the ATSHA204A-SSHDA-T pin-compatible with standard 24C series EEPROMs?
Partially. While it shares the VCC, GND, and I2C pins, it is a security IC, not a standard memory chip. The software interface and protocol are entirely different.
What is the benefit of the SOIC package over UDFN?
The SOIC-8 package is much easier for manual prototyping and visual inspection on the production line, and it offers better mechanical strength in high-vibration environments.
 

Disclaimer

Important Notice: Technical information is for reference only. High-security systems require careful firmware implementation. Always consult the official Microchip ATSHA204A datasheet and security implementation guides for production designs.

ATSHA204A-SSHDA-T Information

  • Specifications
  • Tags
Product attributes
Attribute value
Manufacturer:
Microchip Technology
Series:
CryptoAuthentication™
Package/Case:
8-SOIC (0.154", 3.90mm Width)
Packaging:
Tape & Reel (TR)
Product Status:
Active
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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