DS1624 Datasheet, PDF (1/16 Pages) Dallas Semiconductor – Digital Thermometer and Memory

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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
V_DD
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
V_DD
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
V_DD - 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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