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DS1624

Digital Thermometer and Memory

Dallas Semiconductor -> Maxim Integrated 

www.dalsemi.com

DS1624

Digital Thermometer and Memory

FEATURES

§ Temperature measurements require no

external components

§ Measures temperatures from -55°C to +125°C

in 0.03125°C increments. Fahrenheit

equivalent is -67°F to +257°F in 0.05625°F

increments

§ Temperature is read as a 13-bit value (two

byte transfer)

§ Converts temperature to digital word in 1

second (max)

§ 256 bytes of E2 memory on board for storing

information such as frequency compensation

coefficients

§ Data is read from/written via a 2-wire serial

interface (open drain I/O lines)

§ Applications include temperature-

compensated crystal oscillators for test

equipment and radio systems

§ 8-pin DIP or SOIC packages

PIN ASSIGNMENT

SDA

1

SCL

2

NC

3

GND

4

8

VDD

7

A0

6

A1

5

A2

DS1624S 8-PIN SOIC (208 MIL)

See Mech Drawings Section

SDA 1

SCL 2

NC 3

GND 4

8

VDD

7

A0

6

A1

5

A2

DS1624 8-PIN DIP (300 MIL)

See Mech Drawings Section

PIN DESCRIPTION

SDA - 2-Wire Serial Data Input/Output

SCL - 2-Wire Serial Clock

GND - Ground

A0 - Chip Address Input

A1 - Chip Address Input

A2 - Chip Address Input

VDD - Digital Power Supply (+3V - +5V)

NC - No Connection

DESCRIPTION

The DS1624 consists of a digital thermometer and 256 bytes of E2 memory. The thermometer provides

13-bit temperature readings which indicate the temperature of the device. The E2 memory allows a user to

store frequency compensation coefficients for digital correction of crystal frequency due to temperature.

Any other type of information may also reside in this user space.

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