Analog Devices Inc./Maxim Integrated DS28E10P+

Overview

DS28E10P+ from Maxim Integrated is a 1-Wire SHA-1 authenticator IC with dedicated hardware-accelerated SHA-1 engine, 224-bit one-time programmable (OTP) EPROM, and factory-programmed unique 64-bit ROM ID. It operates from 2.8V to 3.6V across –40°C to +85°C, communicates at up to 125kbps in overdrive mode, and provides irreversible write protection for secure accessory authentication in industrial sensor systems.

For engineers reviewing the DS28E10P+ datasheet, DS28E10P+ pinout, DS28E10P+ application, or DS28E10P+ equivalent, key selection considerations include its 6-pin TSOC package, 1-Wire open-drain interface with ±6kV HBM ESD rating, guaranteed 10-year data retention at +85°C, and compliance with FIPS 180-3 SHA-1 for cryptographic challenge-response authentication.

Technical Context

The DS28E10P+ implements a 512-bit SHA-1 engine that computes message authentication codes (MACs) using security data stored in on-chip registers and challenge data supplied by the host. Its 28-byte OTP EPROM is organized in seven 4-byte blocks, each automatically write-protected after programming - no partial rewrites permitted.

Communication follows the standard 1-Wire protocol with ROM function commands (e.g., Match ROM, Overdrive-Match ROM) enabling node addressing in multidrop networks. The device supports both standard speed (15.4kbps) and overdrive mode (125kbps), with timing parameters including tRSTL (48–80μs overdrive reset low), tPDH (2–6μs presence detect high), and tSLOT (8μs overdrive timeslot).

Key Specifications

Pinout & Package

DS28E10P+ uses a 6-lead TSOC (Thin Small Outline Package) with exposed pad, optimized for compact PCB layouts and thermal performance in space-constrained modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-Wire cryptographic authenticator applications.

Compared with DS28E10P+, DS2432P+T trades hardware acceleration for flexible memory updates, while MAX32664AELB+ adds processing capability at the cost of interface compatibility and power budget - DS28E10P+ remains optimal for low-pin, low-power, one-time-provisioned authentication.

Availability

DS28E10P+ is available at Aetrix Electronics and suitable for medical sensor authentication, industrial calibration certificate storage, print cartridge licensing, and IoT edge device onboarding requiring stable component supply and long-term lifecycle assurance.

Supply support for DS28E10P+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and secure authentication ICs for industrial, medical, and communications applications.

The DS28E10P+ belongs to Maxim's 1-Wire secure authenticator product line, engineered specifically for low-pin-count, tamper-resistant identity verification in consumables, sensors, and peripherals.

FAQ

What is the primary security function of the DS28E10P+?

The DS28E10P+ provides hardware-accelerated SHA-1 challenge-response authentication compliant with FIPS 180-3. It uses a dedicated 512-bit SHA-1 engine, factory-programmed 64-bit ROM ID, and secret security data to generate cryptographically secure message authentication codes (MACs), preventing cloning and unauthorized access in systems like medical probes and printer cartridges.

Does the DS28E10P+ support reprogramming of its OTP memory?

No, the DS28E10P+ does not support reprogramming. Its 224-bit user EPROM is one-time programmable (OTP): each 4-byte block becomes permanently write-protected after the first write. This design ensures calibration data or licensing keys cannot be altered post-manufacturing - a core requirement for secure authentication applications.

What package type is used by the DS28E10P+?

The DS28E10P+ uses a 6-lead TSOC (Thin Small Outline Package) with no internal connection on pins 4, 5, and 6. This RoHS-compliant, lead-free package measures 2.9mm × 1.6mm × 1.1mm and is optimized for compact, high-density PCB layouts in space-constrained accessories and sensors.

How does the DS28E10P+ handle 1-Wire communication speed negotiation?

The DS28E10P+ supports both standard speed (15.4kbps) and overdrive mode (125kbps). Speed is set via ROM function commands: Overdrive-Skip ROM (0x3C) or Overdrive-Match ROM (0x69) initiate overdrive mode; a standard-speed reset pulse ≥480μs returns the device to standard speed. Timing parameters like tSLOT (8μs) and tRSTL (48–80μs) are strictly defined for reliable operation.

Is the DS28E10P+ suitable for automotive applications?

The DS28E10P+ is rated for –40°C to +85°C operation and meets industrial temperature requirements, but it is not AEC-Q200 qualified or specified for automotive under-hood environments. It is appropriate for cabin-mounted or non-safety-critical automotive accessories where industrial-grade reliability suffices, but not for engine control or ADAS subsystems requiring automotive qualification.