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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 528kB) Download   E-Mail

Description

The DS1629 digital thermometer and real-time clock integrates the critical functions of a real-time clock and a temperature sensor in a 150mil 8-pin SO package (DS1629S). Communication to the DS1629 is accomplished through a 2-wire interface. The wide power supply range and minimal power requirement of the DS1629 allow for accurate time/temperature measurements in battery-powered applications. The real-time clock/calendar provides seconds, minutes, hours, day, day of the week, date of the month, month, and year. The end of the month date is automatically adjusted for months with less than 31 days, including corrections for leap years. The real-time clock operates in either a 12- or 24-hour format with AM/PM indicator in 12-hour mode. The user-supplied crystal oscillator frequency is internally divided, as specified by device configuration. An open-drain oscillator output is provided that can be used as the clock input to a microcontroller. The thermometer offers ±2°C accuracy over a -10°C to +85°C range. Thermometer data is read out in 2's complement format with 9 bits of resolution. Higher resolution readings can be calculated using data from the DS1629 counter and slope accumulator registers. The open-drain alarm output of the DS1629 becomes active when either the measured temperature exceeds the programmed over-temperature limit (TH) or the current time reaches the programmed alarm setting. The user can configure which event (time only, temperature only, either, or neither) will generate an alarm condition. For storage of general system data or time/temperature datalogging, the DS1629 provides 32 bytes of SRAM.

Key Features		Applications/Uses
Real-time clock/calendar ±2°C thermometer accuracy from -10°C to +85°C Measures temperatures from -55°C to +125°C (-67°F to +257°F) 9-bit (expandable) temperature resolution Thermostatic and time alarm settings are user-definable and nonvolatile Dedicated open-drain alarm output 32 bytes SRAM for general data storage Data is transferred over 2-wire/SMBus interface 2.7V to 5.5V supply range 150-mil 8-pin SO (DS1629S) package		Computer Servers Medical Devices

Diagram

Functional Block Diagram

Application Notes

Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS1629 Application Note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors - DS1629

Design Guides

Thermal Management (PDF) Real-Time Clocks (PDF)

Reliability Reports

Reliability Report: DS1629.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-7 of 7

DS1629	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1629S-C03+T&R			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1629S-C03+			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1629S-C05+T&R			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	0°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1629S			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1629S/T&R			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1629S+			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1629S+T&R			Active	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2001-05-03  Temperature Family by Product Type

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