Datasheet

General Description
The DS1624 consists of two separate functional units: a
256-byte nonvolatile E
2
memory and a direct-to-digital
temperature sensor.
The nonvolatile memory is made up of 256 bytes of E
2
memory. This memory can be used to store any type of
information the user wishes. These memory locations are
accessed through the 2-wire serial bus.
The direct-to-digital temperature sensor allows the
DS1624 to measure the ambient temperature and report
the temperature in a 12-bit word with 0.0625°C resolu-
tion. The temperature sensor and its related registers are
accessed through the 2-wire serial interface. Figure 1
shows a block diagram of the DS1624.
Benets and Features
● Reduces Component Count with Integrated
Temperature Sensor and Nonvolatile E
2
Memory
• Measures Temperatures from -55°C to +125°C in
0.0625°C Increments
• ±0.5°C Accuracy from 0°C to 70°C
• 256 Bytes of E
2
Memory for Storing Information
Such as Frequency Compensation Coefcients
• No External Components
● Easy-to-Use 2-Wire Serial Interface
• Temperature is Read as a 12-Bit Value
(2-Byte Transfer)
● Available in 8-Pin SO and DIP Packages
Ordering Information appears at end of data sheet.
19-6288; Rev 4; 1/15
Figure 1. Block Diagram
STATUS REGISTER AND
CONTROL LOGIC
TEMPERATURE
SENSOR
EEPROM MEMORY
(256 BYTES)
V
DD
GND
SCL
SDA
A0
A1
A2
DS1624
ADDRESS AND
I/O CONTROL
DS1624 Digital Thermometer and Memory