Analog Devices Inc./Maxim Integrated DS28E05GB+T

Overview

DS28E05GB+T from Maxim Integrated is a 1-Wire® serial EEPROM IC with 112 bytes of user-programmable memory (7 × 16-byte pages), factory-programmed unique 64-bit ROM ID, and open-drain 1-Wire interface operating at up to 76.9 kbps overdrive speed. It supports write protection and EPROM emulation modes per page, operates from 1.71V to 3.63V, and delivers ±8 kV HBM ESD protection on the IO pin - used for PCB identification, medical sensor calibration storage, and consumables authentication.

For engineers reviewing the DS28E05GB+T datasheet, DS28E05GB+T pinout, DS28E05GB+T application, or DS28E05GB+T equivalent, key selection criteria include 1-Wire bus compatibility, page-level write protection configuration, parasitic power capability, 4-ball UCSP/2-pad SFN/3-pin SOT23/6-pin TSOC package options, and guaranteed 10-year data retention at +85°C.

Technical Context

The DS28E05GB+T implements a single-contact 1-Wire slave interface with strict timing compliance: reset low time ≥48 µs, presence detect sample window 8–10 µs, and overdrive-only operation requiring VPUP = 1.71–3.63 V and RPUP ≤1.5 kΩ (3.3 V) or ≤750 Ω (1.8 V). Its internal architecture includes 64-bit ROM ID (family code 0Dh), 64-bit administrative data (page protection nibbles PPA–PPD), and 112-byte user EEPROM organized as seven 128-bit pages.

Memory access follows hierarchical 1-Wire protocol: ROM function command (e.g., Match ROM, Skip ROM) must precede memory function commands (Read Memory F0h, Write Memory 55h); writes occur in 2-byte segments with read-after-write verification and self-timed tPROG = 16 ms per segment. Protection settings are irreversible once programmed - e.g., writing non-zero to nibble 0073h upper locks PPA–PPD locations.

Key Specifications

Pinout & Package

DS28E05GB+T is available in multiple packages: 4-ball UCSP (1.2 mm × 1.2 mm), 2-pad SFN (3.5 mm × 5 mm, electro-mechanical contact only), 3-pin SOT23, and 6-pin TSOC. The UCSP and SOT23 variants are most common for space-constrained PCBs. All share identical pin functionality: IO (open-drain 1-Wire bus), GND, and N.C. pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS28E05GB+T, DS28EC20+ offers scalable memory for complex calibration workflows without altering 1-Wire integration, while DS2431+ trades speed and protection granularity for broader host compatibility at lower cost - neither is pin-compatible, but all share identical 1-Wire electrical interface and ROM ID architecture.

Availability

DS28E05GB+T is available at Aetrix Electronics and suitable for accessory authentication, medical sensor calibration storage, and analog sensor trim applications requiring stable component supply, long-term data integrity, and secure device identification.

Supply support for DS28E05GB+T 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 digital ICs for industrial, medical, and communications applications - known for high-reliability interface and security solutions.

The DS28E05GB+T belongs to Maxim's 1-Wire secure memory product line, engineered specifically for tamper-resistant identification and calibration data storage in resource-constrained, battery-free, or sealed-system environments.

FAQ

What is the primary function of the DS28E05GB+T?

The DS28E05GB+T is a 1-Wire serial EEPROM IC that provides 112 bytes of user-programmable nonvolatile memory with factory-programmed 64-bit ROM ID. Its core function is secure, low-pin-count device identification and calibration data storage - used in accessories, sensors, and consumables where space, cost, and authenticity are critical. DS28E05GB+T supports write protection and EPROM emulation modes to ensure data integrity across its 10-year retention lifetime.

Does the DS28E05GB+T support parasitic power operation?

Yes, the DS28E05GB+T fully supports parasitic power operation - it draws operating current directly from the IO line during active communication, eliminating the need for a separate VCC connection. This is enabled by its open-drain IO pin and internal charge pump; design requires an external pullup resistor (300–1500 Ω) and careful attention to bus capacitance and timing. DS28E05GB+T remains functional across its full 1.71–3.63 V supply range in parasitic mode.

How many write cycles does the DS28E05GB+T guarantee?

The DS28E05GB+T guarantees 1,000 write/erase cycles at +85°C, as tested per JESD47G standards. This endurance rating applies to each 2-byte segment written via the Write Memory (55h) command. Real-world usage typically exceeds this under normal conditions (e.g., room temperature), but DS28E05GB+T is intended for infrequent updates - such as factory calibration or one-time provisioning - not high-frequency logging.

Can the DS28E05GB+T be used in a multidrop 1-Wire network?

Yes, the DS28E05GB+T is explicitly designed for multidrop 1-Wire networks. Its factory-programmed 64-bit ROM ID serves as a unique node address, enabling individual addressing via Match ROM (55h) or Search ROM (F0h) commands. However, DS28E05GB+T operates overdrive-speed only (76.9 kbps) and must be isolated from standard-speed or dual-speed devices on the same bus to avoid timing conflicts.

What package options are available for the DS28E05GB+T?

The DS28E05GB+T is offered in four package types: 4-ball UCSP (1.2 mm × 1.2 mm), 2-pad SFN (3.5 mm × 5 mm, qualified for electro-mechanical contact only), 3-pin SOT23, and 6-pin TSOC. The UCSP and SOT23 variants are most widely used in space-constrained PCBs; the SFN variant is restricted to contact-based interfaces (e.g., docking connectors) and is not solderable. DS28E05GB+T pinout remains consistent across all packages: IO, GND, and N.C.