Analog Devices Inc./Maxim Integrated DS1624S+T&R

Overview

DS1624S+T&R from Maxim Integrated is a digital thermometer and nonvolatile EEPROM memory IC combining temperature sensing and data storage in a single 8-pin SO package. It measures ambient temperature from −55°C to +125°C with ±0.5°C accuracy (0°C to +70°C), 0.0625°C resolution, and integrates 256 bytes of E² memory accessible via 2-wire serial interface - used in thermal calibration storage for industrial sensors and embedded power supplies.

For engineers reviewing the DS1624S+T&R datasheet, DS1624S+T&R pinout, DS1624S+T&R application, or DS1624S+T&R equivalent, key selection considerations include its dual-function architecture (temperature sensor + EEPROM), I²C-compatible 2-wire interface with fast-mode support up to 400 kHz, −55°C to +125°C operating range, and SO-8 packaging suitable for space-constrained PCB layouts.

Technical Context

The DS1624S+T&R implements a bandgap-based temperature sensor paired with a delta-sigma ADC to produce calibrated 12-bit temperature readings stored in a 16-bit two's complement register. Its 2-wire interface operates in both standard (100 kHz) and fast (400 kHz) modes, supporting slave receiver/transmitter roles with hardware address decoding via A0–A2 pins.

Internal configuration is managed through a nonvolatile status/configuration register controlling one-shot vs. continuous conversion mode and indicating conversion completion (DONE bit). The 256-byte EEPROM supports byte and page programming with 20,000 write cycles and 10-year data retention at −40°C to +70°C.

Key Specifications

Pinout & Package

DS1624S+T&R is housed in an 8-pin SOIC (208 mils) package with gull-wing leads, RoHS-compliant and tape-and-reel packaged (2000 units per reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital thermometer and memory applications.

Compared with DS1624S+T&R, MAX31875RASD+ trades supply voltage range and memory depth for higher precision, while STTS751-2DMR replaces software-configurable conversion control with dedicated hardware thermal outputs - making DS1624S+T&R optimal for flexible, firmware-driven thermal management with persistent calibration storage.

Availability

DS1624S+T&R is available at Aetrix Electronics and suitable for industrial motor drives, medical diagnostic equipment, telecom base station power supplies, and automotive battery management systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for DS1624S+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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and digital ICs for demanding industrial, automotive, and communications applications.

The DS1624S+T&R belongs to Maxim's digital thermometer and memory product line, engineered to consolidate thermal sensing and nonvolatile data storage into a single I²C-compatible device for space- and cost-sensitive embedded systems.

FAQ

What is the operating temperature range of the DS1624S+T&R?

The DS1624S+T&R operates from −55°C to +125°C across its full specification range. This rating is validated per JEDEC standards and applies to both temperature measurement and EEPROM functionality. The device maintains ±0.5°C accuracy between 0°C and +70°C, and ±2.0°C accuracy across the full range - making DS1624S+T&R suitable for under-hood automotive, industrial motor control, and outdoor telecom deployments where extreme thermal cycling occurs.

How does the DS1624S+T&R handle I²C address configuration?

The DS1624S+T&R uses three hardware address pins - A0, A1, and A2 - to set the three least significant bits of its 7-bit I²C slave address. With the fixed 4-bit prefix "1001", this yields eight possible addresses (0x90 to 0x97). Each pin must be tied to VDD or GND; floating connections are undefined. This addressing scheme allows up to eight DS1624S+T&R units on a single I²C bus, enabling multi-zone thermal monitoring without address conflicts or software remapping.

Can the DS1624S+T&R perform temperature conversions autonomously?

Yes - the DS1624S+T&R supports both continuous and one-shot conversion modes controlled via its nonvolatile configuration register. In continuous mode (default shipping state), it automatically performs conversions every 500 ms. In one-shot mode, each Start Convert T command (0xEE) triggers exactly one conversion, after which the device returns to idle until re-activated. The DONE bit in the configuration register indicates completion, allowing efficient polling without fixed delays - a key feature distinguishing DS1624S+T&R from basic temperature sensors requiring fixed wait times.

What is the EEPROM endurance and data retention specification for the DS1624S+T&R?

The DS1624S+T&R EEPROM is rated for 20,000 write cycles at −20°C to +70°C and 40,000 cycles at +25°C, with data retention guaranteed for 10 years at −40°C to +70°C and 20 years at room temperature. Write operations require up to 50 ms to complete, during which the device does not acknowledge I²C traffic. These specifications are production-tested and documented in Maxim's official datasheet revision 5 - confirming DS1624S+T&R's suitability for infrequent calibration updates rather than high-frequency logging.

Does the DS1624S+T&R require external components for basic operation?

No - the DS1624S+T&R requires no external components for core functionality. Only two external 4.7 kΩ pull-up resistors (to VDD) on SDA and SCL lines are needed for I²C bus compliance. A 0.1 µF ceramic decoupling capacitor on VDD is strongly recommended but not strictly mandatory for short-duration lab testing. The absence of trimming resistors, reference voltages, or signal-conditioning circuitry makes DS1624S+T&R a true "connect-and-read" solution - reducing design validation effort and PCB layout complexity compared to discrete sensor + memory implementations.