19-6288; Rev 5/12
DS1624
Digital Thermometer and Memory
www.maxim-ic.com
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
SDA
SCL
NC
GND
1
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
DS1624S 8-PIN SOIC (208 MIL)
SDA
SCL
NC
GND
1
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
DS1624 8-PIN PDIP (300 MIL)
PIN DESCRIPTION
SDA
SCL
GND
A0
A1
A2
V
DD
NC
- 2-Wire Serial Data Input/Output
- 2-Wire Serial Clock
- Ground
- Chip Address Input
- Chip Address Input
- Chip Address Input
- Power Supply (+2.7V to +5.5V)
- 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.
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