DS1629S+T&R; datasheet, PDF - EEWORLD Datasheet

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DS1629S+T&R;: DescriptionIC THERM/RTC/CALENDAR DIG 8-SOIC; Categorysemiconductor Power management; File Size520KB，23 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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DS1629S+T&R; Overview

IC THERM/RTC/CALENDAR DIG 8-SOIC

DS1629S+T&R; Parametric

Parameter Name	Attribute value
Function	thermometer, thermostat
sensor type	internal
Sensing temperature	-55°C ~ 125°C
Accuracy	±2°C (max)
Topology	ADC, comparator, oscillator, register set
Output type	I²C/SMBus
Output alarm	yes
Output fan	none
Voltage - Power	2.7 V ~ 5.5 V
Operating temperature	-55°C ~ 125°C
Installation type	surface mount
Package/casing	8-SOIC (0.154", 3.90mm wide)
Supplier device packaging	8-SOIC

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DS1629

2-Wire Digital Thermometer

and Real-Time Clock

FEATURES



Measures Temperatures from -55°C to

+125°C; Fahrenheit Equivalent is -67°F to

257°F

Real-Time Clock Counts Seconds, Minutes,

Hours, Date of the Month, Month, Day of the

Week, and Year with Leap Year

Compensation Through the Year 2100

Thermometer Accuracy is ±2.0°C (typ)

Thermometer Resolution is 9 Bits

(Expandable)

Thermostatic and Time Alarm Settings Are

User Definable; Dedicated Open-Drain Alarm

Output

32 Bytes SRAM for General Data Storage

Data is Read From/Written to via a 2-Wire

Serial Interface (Open Drain I/O Lines)

Wide Power Supply Range (2.2V to 5.5V)

Applications Include PCs/PDAs, Cellular

Telephones, Office Equipment, Data Loggers,

or Any Thermally Sensitive System

8-Pin (150-mil) SO Package

PIN CONFIGURATION

SDA

SCL

ALRM

GND

OSC

(150 mils)



SDA

SCL

GND

ALRM

OSC

PIN DESCRIPTION

- 2-Wire Serial Data Input/Output

- 2-Wire Serial Clock

- Ground

- Thermostat and Clock Alarm

Output

- 32.768kHz Crystal Input

- 32.768kHz Crystal Feedback

Output

- Buffered Oscillator Output

- Power-Supply Voltage (+2.2V to

+5V)

DESCRIPTION

The DS1629 2-wire digital thermometer and real-time clock (RTC) integrates the critical functions of a

real-time clock and a temperature monitor in a small outline 8-pin SO package. Communication to the

DS1629 is accomplished via 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 digital thermometer provides 9-bit temperature readings which indicate the temperature of the device.

No additional components are required; the device is truly a “temperature-to-digital” converter.

The clock/calendar provides seconds, minutes, hours, day, date of the month, day of the week, month, and

year. The end of the month date is automatically adjusted for months with less than 31 days, including

corrections for leap years. It operates in either a 12- or 24-hour format with AM/PM indicator in 12-hour

mode. The crystal oscillator frequency is internally divided, as specified by device configuration. An

open-drain output is provided that can be used as the oscillator input for a microcontroller.

1 of 23

19-6849; Rev 11/13

DS1629

The real-time clock/calendar maintains a BCD count of seconds, minutes, hours, day of the week, day of

the month, month, and year. It does so with an internal oscillator/ divider and a required 32.768kHz

crystal. The end of the month date is automatically updated for months with less than 31 days, including

compensation for leap years through the year 2100. The clock format is configurable as a 12- (power-up

default) or 24-hour format, with an AM/PM indicator in the 12-hour mode. The RTC can be shut down

by clearing a bit in the clock register.

The crystal frequency is internally divided by a factor that the user defines. The divided output is buffered

and can be used to clock a microcontroller.

The DS1629 features an open-drain alarm output. It can be configured to activate on a thermal event, time

event, either thermal or time, or neither thermal nor time (disabled, power-up state). The thermal alarm

becomes active when measured temperature is greater than or equal to the value stored in the TH

thermostat register. It will remain active until temperature is equal to or less than the value stored in TL,

allowing for programmable hysteresis. The clock alarm will activate at the specific minute of the week

that is programmed in the clock alarm register. The time alarm is cleared by reading from or writing to

either the clock register or the clock alarm register.

The DS1629 configuration register defines several key items of device functionality. It sets the

conversion mode of the digital thermometer and what event, if any, will constitute an alarm condition. It

also sets the active state of the alarm output. Finally, it enables/disables and sets the division factor for the

oscillator output.

The DS1629 also features 32 bytes of SRAM for storage of general information. This memory space has

no bearing on thermometer or chronograph operation. Possible uses for this memory are time/temperature

histogram storage, thermal data logging, etc.

Digital data is written to/read from the DS1629 via a 2-wire interface, and all communication is MSb

first. Individual registers are accessed by unique 8-bit command protocols.

The DS1629 features a wide power supply range (2.2V

≤

5.5V) for clock functionality, SRAM

data retention, and 2-wire communication. EEPROM writes and temperature conversions should only be

performed at 2.7V

≤

5.5V for reliable results.

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DS1629S+T&R; Related Products

	DS1629S+T&R;	DS1629S/T&R	DS1629S	DS1629S/T&R;	DS1629S-C05+T&R;	DS1629S-2
Description	IC THERM/RTC/CALENDAR DIG 8-SOIC	IC therm/rtc/calendar dig 8-soic	IC therm/rtc/calendar dig 8-soic	IC THERM/RTC/CALENDAR DIG 8-SOIC	IC THERM/RTC/CALENDAR DGTL 8SOIC	Real Time Clock, 0 Timer(s), CMOS, PDSO8, 0.150 INCH, SOIC-8

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