Analog Devices Inc./Maxim Integrated DS28E01G-100+T&R

Overview

DS28E01G-100+T&R from Analog Devices is a 1-Wire secure EEPROM IC integrating 1024-bit EEPROM (4 × 256-bit pages), on-chip SHA-1 engine for challenge-response authentication, and factory-programmed unique 64-bit ROM ID. It operates from 2.8V to 5.25V across –40°C to +85°C and communicates at 15.3kbps or 90.9kbps over a single-contact bus-used in printer cartridge authentication and medical sensor calibration.

For engineers reviewing the DS28E01G-100+T&R datasheet, DS28E01G-100+T&R pinout, DS28E01G-100+T&R application, or DS28E01G-100+T&R equivalent, key selection criteria include 1-Wire interface compliance, SHA-1 MAC generation capability, EPROM-emulation mode support on Page 1, 64-bit secret storage with 320-bit extensibility, and write-protection granularity per page.

Technical Context

The DS28E01G-100+T&R implements ISO/IEC 10118-3 SHA-1 in hardware to compute 160-bit MACs using a 40-bit random challenge, device-specific data, and configurable secrets (64-bit base or extended 320-bit). Its 1-Wire interface uses strong pullup timing and built-in hysteresis/filtering for noise immunity in industrial environments.

Memory architecture includes four 256-bit EEPROM pages, a 64-bit scratchpad for write buffering, and programmable protection: individual page lock, full-array write disable, and Page 1 OTP emulation (1→0 only). The 64-bit ROM ID serves as immutable node address in multi-device 1-Wire networks.

Key Specifications

Pinout & Package

DS28E01G-100+T&R is supplied in a 6-lead TSOC package (Thin Small Outline Package) with exposed pad. Pinout conforms to DS28E01P-100+ variant specifications per Analog Devices datasheet Rev 10/24.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure 1-Wire authentication applications.

Compared with DS28E01G-100+T&R, DS28E05-100+T&R offers double the EEPROM capacity without interface or security trade-offs, while MAX31723AATA+ integrates sensing but sacrifices dedicated authentication flexibility and memory configurability.

Availability

DS28E01G-100+T&R is available at Aetrix Electronics and suitable for printer cartridge authentication, medical sensor calibration, and system IP protection requiring stable component supply and long-term industrial availability.

Supply support for DS28E01G-100+T&R 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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and healthcare applications.

The DS28E01G-100+T&R belongs to Analog Devices' secure 1-Wire authentication product line, designed specifically for cost-sensitive, space-constrained peripherals requiring cryptographic binding without MCU overhead.

FAQ

What is the primary function of the DS28E01G-100+T&R in a 1-Wire system?

The DS28E01G-100+T&R functions as a secure identity and data vault, providing cryptographically verified authentication via its on-chip SHA-1 engine and storing protected calibration or licensing data in its 1024-bit EEPROM. Its 64-bit ROM ID ensures unique node addressing, and the DS28E01G-100+T&R responds to host challenges with 160-bit MACs to establish trust before data exchange or feature enablement.

Does the DS28E01G-100+T&R support both parasitic and active power modes on the 1-Wire bus?

Yes, the DS28E01G-100+T&R supports both parasitic and active power configurations. In parasitic mode, it draws operating current from the 1-Wire bus during communication; in active mode, V_CC supplies power independently. The DS28E01G-100+T&R automatically detects and adapts to the selected mode based on V_CC voltage presence and level, ensuring compatibility across diverse host designs.

How is the 320-bit secret extension implemented in the DS28E01G-100+T&R?

The DS28E01G-100+T&R extends its base 64-bit secret to 320 bits by designating one 256-bit EEPROM page as both read- and write-protected. That page's contents are concatenated with the 64-bit secret register during SHA-1 computation. This configuration is controlled via specific memory control registers, and the DS28E01G-100+T&R enforces access restrictions to prevent unauthorized modification of the extended secret.

Can Page 1 of the DS28E01G-100+T&R be used for permanent key storage?

Yes, Page 1 of the DS28E01G-100+T&R can be placed in EPROM-emulation mode, allowing bits to transition only from 1 to 0. Once programmed, this page becomes irreversible - ideal for storing cryptographic keys, serial numbers, or calibration constants that must survive reprogramming attempts. The DS28E01G-100+T&R enforces this behavior at the silicon level, independent of software control.

What package type and reel quantity does DS28E01G-100+T&R ship in?

The DS28E01G-100+T&R is supplied in a 6-lead TSOC package with exposed thermal pad and shipped in tape-and-reel format containing 2500 units per reel. The "+" suffix confirms RoHS-compliance and lead-free finish, and the "T&R" designation explicitly indicates tape-and-reel packaging - verified in Analog Devices' official ordering information table.