DS2478ATB/VY+

Specialized ICS Overview

The DS2478ATB/VY+T is a DeepCover secure coprocessor designed for automotive and IoT applications. It provides hardware-accelerated ECDSA P-256 and SHA-256 cryptographic functions, including signature generation, verification, and HMAC computation. The device integrates a FIPS/NIST-compliant true random number generator (TRNG), 6Kb of secured one-time programmable (OTP) memory, and a configurable GPIO pin. Communication occurs via an I2C interface supporting clock frequencies up to 1MHz. It operates within a supply voltage range of 2.97V to 3.63V and supports an extended temperature range from -40°C to +125°C.

Specialized ICS Feature Summary

• Hardware acceleration for FIPS 186 ECDSA P-256 and FIPS 180 HMAC/SHA-256 operations
• Integrated TRNG with NIST SP 800-90B compliant entropy source
• 6Kb secured OTP memory for keys, certificates, and user data
• I2C communication interface with support for speeds up to 1MHz

Specialized ICS Applications

• Automotive secure authentication
• IoT node crypto-protection
• Secure boot or download of firmware and system parameters
• Secure storage of cryptographic keys for host controllers

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging containing 2,500 units per reel. Confirm the 'V' suffix denotes automotive qualification and 'Y' specifies the side-wettable TDFN package variant. Ensure compatibility with the intended host controller's I2C voltage levels and timing requirements before procurement.

Specialized ICS Selection Notes

Select this component when hardware offloading of ECC P-256 and SHA-256 computations is required to reduce host processor load. It is suitable for designs needing a dedicated secure element for key storage and authenticated communication. Verify that the application environment falls within the specified -40°C to +125°C operating temperature range and utilizes a 3.3V power supply.

Specialized ICS Part Context

This part belongs to the Analog Devices DeepCover family of secure microcontrollers. It serves as a companion coprocessor to devices such as the DS28E40 and DS28C40, providing essential security services like asymmetric key authentication and secure data storage. The device is AEC-Q100 Grade 1 qualified for automotive reliability standards.

Specialized ICS Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should evaluate other DeepCover series components or comparable automotive-grade secure coprocessors based on specific cryptographic algorithm support and package footprint requirements.

Specialized ICS FAQ

What is the maximum I2C clock frequency supported by the DS2478?

The DS2478 supports I2C communication at clock frequencies up to 1MHz.

How much secured OTP memory is available on the chip?

The device integrates 6Kb of secured one-time programmable (OTP) memory, which can be configured for user data, keys, and certificates.

Does the DS2478 include a true random number generator?

Yes, it includes a FIPS/NIST-compliant true random number generator (TRNG) with an entropy source that meets NIST SP 800-90B standards.