DS1615

Series: -
Time Format: HH:MM:SS (12/24 hr)
Date Format: YY-MM-DD-dd
Operating Temperature: -40°C ~ 85°C
Packaging: Tube
Mounting Type: Through Hole
Interface: 3-Wire Serial
Memory Size: 32B
Package / Case: 16-DIP (0.300", 7.62mm)
Supplier Device Package: 16-PDIP
Manufacturer: Maxim Integrated Products
Type: Temperature Recorder
Features: Alarm, Leap Year, Unique ID, Y2K
Voltage - Supply: 4 V ~ 5.5 V
Voltage - Supply, Battery: 2.7 V ~ 4.95 V


Features:

· Digital thermometer measures temperature -40°C to +85°C in 0.5°C increments (-40°F to +183.2°F in 0.9°F increments)
· Digital thermometer provides ±2°C accuracy
· Real Time Clock/Calendar in BCD format counts seconds, minutes, hours, date, month, day of the week, and year with leap year compensation (Y2K compatible)
· Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes
· Logs up to 2048 consecutive temperature measurements in read-only nonvolatile memory
· Records long-term temperature histogram in 63 bins with 2.0°C resolution
· Programmable temperature-high and temperature-low alarm trip points
· Two serial interface options: synchronous and
· asynchronous
    - 3-wire synchronous serial interface
    - Asynchronous serial interface compatible with standard UARTs
· Memory partitioned into 32-byte pages for packetizing data
· On-chip 16-bit CRC generator to safeguard data read operations in asynchronous communications mode
· Unique, factory lasered and tested 64-bit serial number


Pinout




Specifications

Voltage on Any Pin Relative to Ground      -0.3V to +7.0V
Operating Temperature                       -40°C to +85°C
Storage Temperature                        -55°C to +125°C
Soldering Temperature        See J-STD-020A specification
*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.


Description

The DS1615 is an integrated temperature recorder that combines a real time clock with temperature data logging and histogram capabilities. DS1615 has been designed for applications that require temperature profiling over a given period of time. A programmable sampling rate feature makes the device ideal for applications requiring temperature monitoring over short or long time frames. The integrated Real Time Clock (RTC) provides seconds, minutes, hours, day, date, month, and year information with leap year compensation and also provides an alarm interrupt. Temperature measurement is provided via integrated thermal technology which can measure temperatures from -40°C to +85°C in 0.5°C increments.

The DS1615 is a powerful data recording device, providing both a datalog of sampled temperature values over time and a histogram of temperature. The datalog function samples the temperature at a user defined sample rate and writes the data to the Temperature Datalog memory. Up to 2048 datalog samples may be recorded. Histogram functionality is implemented by sampling the temperature and then incrementing the count value in a data bin associated with that temperature. The DS1615 provides 63, 2-byte data bins in 2°C increments. The user can program data sampling for both data logging and for histogram tabulation at intervals ranging from once per minute to once every 255 minutes.

The DS1615 also supports programmable high and low temperature alarm trip points that allow the device to monitor whether the temperature stays within desired limits. The device can drive an interrupt or status pin if the temperature falls outside of the programmable limits. The DS1615 can be programmed to begin sampling data via a pushbutton input or via a command sent over the serial interface with a host machine.

The DS1615 also provides a 64-bit serial number, which is useful for product identification and tracking.