Rainbow Electronics DS1624 - Manual

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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 E 2
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
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 E
2
memory. The thermometer provides
13-bit temperature readings which indicate the temperature of the device. The E
2
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.
DS1624
Digital Thermometer and Memory
www.dalsemi.com
6 3
1
2
4
8
7
5
SDA
SCL
NC
GND
V
DD
A
0
A
1
A
2
DS1624S 8-PIN SOIC (208 MIL)
See Mech Drawings Section
6 3
1
2
4
8
7
5
SDA
SCL
NC
GND
V
DD
A
0
A
1
A
2
DS1624 8-PIN DIP (300 MIL)
See Mech Drawings Section