Analog Devices Inc./Maxim Integrated DS24B33G+T&R

Overview

DS24B33G+T&R from Analog Devices is a 4096-bit, 1-Wire® EEPROM organized as 16 pages of 256 bits each, featuring a 32-byte scratchpad for write-verify operation, 64-bit unique factory-programmed registration number, and parasitic power operation over a single-conductor bus - used for calibration constant storage, board identification, and product revision tracking in industrial sensor nodes and embedded systems.

For engineers reviewing the DS24B33G+T&R datasheet, DS24B33G+T&R pinout, DS24B33G+T&R application, or DS24B33G+T&R equivalent, key selection considerations include 1-Wire timing compliance (standard/overdrive modes), scratchpad-based write integrity, -40°C to +85°C operating range, SFN package mechanical interface, and backward compatibility with DS2433 family code 0x23.

Technical Context

The DS24B33G+T&R implements a fully parasitic-powered 1-Wire slave interface with open-drain IO requiring external pullup, supporting both standard-speed (15.4kbps) and overdrive-speed (125kbps) communication. Its memory architecture enforces a two-step write process: data first loaded into volatile 32-byte scratchpad, verified via readback, then copied to nonvolatile EEPROM under strict CRC-16 (X¹⁶+X¹⁵+X²+1) validation.

Each device contains a unique 64-bit ROM ID (8-bit family code 0x23, 48-bit serial number, 8-bit CRC), enabling multidrop bus addressing without external addressing logic. The SFN package variant is qualified exclusively for electro-mechanical contact applications - not soldering - and requires direct mechanical engagement with compliant mating contacts per Analog Devices' attachment guidelines.

Key Specifications

Pinout & Package

SFN package (6mm × 6mm × 0.9mm), qualified for electro-mechanical contact only - not solderable. Requires compliant mating connector with defined contact force and alignment per Analog Devices' application note on attachment methods.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS2433+T&R, DS24B33G+T&R delivers higher ESD robustness and guaranteed 50k write cycles at +85°C, while DS24B33S+T&R offers solderable mounting and identical electrical performance - making DS24B33G+T&R the sole option for electro-mechanical contact deployments requiring industrial-grade reliability.

Availability

DS24B33G+T&R is available at Aetrix Electronics and suitable for calibration data storage, board identification, and product revision tracking requiring stable component supply across industrial, medical, and test equipment programs.

Supply support for DS24B33G+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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and connectivity applications.

The DS24B33G+T&R belongs to Analog Devices' 1-Wire EEPROM product line, designed specifically for rugged, low-pin-count, parasitic-powered identity and calibration storage in space-constrained or mechanically interfaced systems.

FAQ

What is the package type and mounting method for DS24B33G+T&R?

The DS24B33G+T&R uses the SFN package (6mm × 6mm × 0.9mm), which is qualified exclusively for electro-mechanical contact applications - not soldering. It requires compliant mating connectors with defined contact force and alignment per Analog Devices' application note on attachment methods. This distinguishes DS24B33G+T&R from solderable variants like DS24B33S+T&R.

Does DS24B33G+T&R require an external power supply?

No, DS24B33G+T&R operates with parasitic power only - it draws all required energy from the 1-Wire bus through the IO pin during active communication. No V_CC connection is needed or supported. The device functions across VPUP = 2.8V to 5.25V, and its internal circuitry conditions power directly from the bus line.

How does the scratchpad mechanism in DS24B33G+T&R ensure data integrity during writes?

The DS24B33G+T&R uses a mandatory two-step write process: data is first written to a 32-byte volatile scratchpad, then verified via readback (including optional CRC-16 check), before issuing the Copy Scratchpad command to commit to EEPROM. This prevents partial or corrupted writes - a critical safeguard for calibration constants or board IDs stored in DS24B33G+T&R.

Is DS24B33G+T&R pin-compatible with DS2433?

DS24B33G+T&R shares the same 2-pin SFN footprint and functional pinout (GND, IO) as DS2433 variants in matching packages, and maintains identical 1-Wire timing, family code (0x23), and memory map. However, DS24B33G+T&R is not a drop-in replacement for DS2433 in soldered applications - its SFN variant is contact-only, whereas DS2433+T&R TO-92 is through-hole solderable.

What is the maximum write endurance and data retention of DS24B33G+T&R at industrial temperature?

At +85°C (industrial worst-case), DS24B33G+T&R guarantees 50,000 write/erase cycles and 40 years of data retention. These values are production-tested and specified per Analog Devices' datasheet - exceeding DS2433's 200k cycles only at +25°C and offering superior long-term reliability for field-deployed systems storing calibration or revision data.