Analog Devices Inc./Maxim Integrated DS28E01P-100+

Overview

DS28E01P-100+ from Analog Devices is a 1-Wire secure authentication EEPROM IC integrating a hardware SHA-1 engine, 1024-bit EEPROM (4 × 256-bit pages), 64-bit factory-programmed ROM ID, and EPROM-emulation mode for Page 1. It performs challenge-response authentication in peripheral accessories such as printer cartridges and medical sensors.

For engineers reviewing the DS28E01P-100+ datasheet, DS28E01P-100+ pinout, DS28E01P-100+ application, or DS28E01P-100+ equivalent, key selection criteria include 1-Wire interface speed (15.3/90.9 kbps), 64-bit secret + 40-bit random challenge support, write-protection granularity, EPROM-emulation capability, and operation across –40°C to +85°C.

Technical Context

The DS28E01P-100+ implements ISO/IEC 10118-3 SHA-1 in dedicated on-die logic to compute 160-bit MACs using a 64-bit or extended 320-bit secret combined with a 40-bit host challenge. It uses the 1-Wire bus for bidirectional communication with parasitic or V_CC-powered operation.

Memory architecture includes a 64-bit scratchpad for page-write buffering, per-page write protection (Page 0, Page 3, or all four), and OTP-style bit-wise programming (1→0 only) on Page 1. The device responds to standard 1-Wire reset/presence detection and command sequences.

Key Specifications

Pinout & Package

DS28E01P-100+ is housed in a 6-lead TSOC (Thin Small Outline Package) with exposed pad option not applicable to this variant. Pinout conforms to Maxim/Analog Devices 1-Wire TSOC standard layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure authentication EEPROM applications.

Compared with DS28E01P-100+, DS28E05P-100+ provides double the EEPROM capacity in identical form factor and protocol, while MAX31328 shifts to AES-128 with different memory size and package-requiring crypto stack rework but offering stronger algorithmic assurance.

Availability

DS28E01P-100+ is available at Aetrix Electronics and suitable for printer cartridge authentication, medical sensor calibration, and system IP protection requiring stable component supply across industrial temperature ranges and long-lifecycle designs.

Supply support for DS28E01P-100+ 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

Analog Devices is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The DS28E01P-100+ belongs to Analog Devices' 1-Wire secure authentication product line, designed specifically for cost-sensitive, space-constrained peripheral authentication in consumables and medical devices.

FAQ

What is the primary security function of the DS28E01P-100+?

The DS28E01P-100+ provides challenge-response authentication using an on-chip SHA-1 engine. It computes 160-bit message authentication codes (MACs) from a host-supplied 40-bit random challenge, a device-bound secret (64-bit or extended 320-bit), and internal device data. This ensures only authorized peripherals can operate with the host system, and the DS28E01P-100+ enforces this via write-protected memory and strict access control.

Does the DS28E01P-100+ require an external power supply (V_CC) to operate?

Yes, the DS28E01P-100+ supports both parasitic and V_CC-powered modes. V_CC is required for full-speed 90.9 kbps communication and faster EEPROM write operations. In parasitic mode, it draws power from the 1-Wire bus through the IO line, but write times increase and voltage margin tightens-so DS28E01P-100+ designs should include V_CC for robustness in production systems.

How is memory protection implemented on the DS28E01P-100+?

The DS28E01P-100+ offers three memory protection mechanisms: (1) per-page write protection (Page 0, Page 3, or all four pages), (2) EPROM-emulation mode on Page 1 allowing only 1→0 bit transitions, and (3) secret-dependent access control-where write or authenticated read requires prior MAC validation. These layers ensure calibration data, keys, and firmware signatures stored in DS28E01P-100+ EEPROM remain tamper-resistant.

Can the DS28E01P-100+ be used in place of the DS28E01-100+ (TO-92 package)?

No-the DS28E01P-100+ uses a 6-lead TSOC package, while the DS28E01-100+ uses a 2-lead TO-92 package. They share identical electrical functionality and 1-Wire protocol, but their pin count, physical dimensions, and mounting requirements differ. Substituting DS28E01P-100+ for DS28E01-100+ requires PCB redesign. Both are valid variants of the same core DS28E01-100 family.

What is the role of the 64-bit ROM ID in DS28E01P-100+ operation?

The 64-bit ROM ID is factory-programmed and globally unique to each DS28E01P-100+. It serves as the device's permanent network address on a multi-drop 1-Wire bus, enabling host systems to identify and communicate with individual DS28E01P-100+ units without address conflicts. It also binds cryptographic operations to the physical device, preventing secret reuse across units-making the DS28E01P-100+ suitable for asset tracking and anti-cloning applications.