DS1624 Maxim Integrated Products, DS1624 Datasheet - Page 3

• Manufacturer Part Number: DS1624
• Description: IC THERM/EEPROM DIG 256BYTE 8DIP
• Manufacturer: Maxim Integrated Products

Specifications of DS1624

• Function: Thermometer, Thermostat
• Topology: EEPROM, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: 2-Wire Serial
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 13 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DS1624 FUNCTIONAL BLOCK DIAGRAM Figure 1
2-WIRE SERIAL DATA BUS
The DS1624 supports a bi–directional two–wire bus and data transmission protocol. A device that sends
data onto the bus is defined as a transmitter, and a device receiving data as a receiver. The device that
controls the message is called a “master”. The devices that are controlled by the master are “slaves”. The
bus must be controlled by a master device which generates the serial clock (SCL), controls the bus access,
and generates the START and STOP conditions. The DS1624 operates as a slave on the two–wire bus.
Connections to the bus are made via the open–drain I/O lines SDA and SCL. The following bus protocol
has been defined (See Figure 2):
• Data transfer may be initiated only when the bus is not busy.
• During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in
Accordingly, the following bus conditions have been defined:
Bus not busy: Both data and clock lines remain HIGH.
Start data transfer: A change in the state of the data line, from HIGH to LOW, while the clock is HIGH,
defines a START condition.
Stop data transfer: A change in the state of the data line, from LOW to HIGH, while the clock line is
HIGH, defines the STOP condition.
the data line while the clock line is high will be interpreted as control signals.
SDA
SCL
V
A0
A1
A2
DD
GND
I/O CONTROL
ADDRESS
AND
3 of 17
EEPROM MEMORY (256 BYTES)
TEMPERATURE SENSOR
STATUS REGISTER &
CONTROL LOGIC
DS1624