DS1615

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ORDERING INFORMATION

DS1615 16-Pin DIP

DS1615S 16-Pin SOIC

DS1615S 16

-Pin SOIC

DS1615X Flip Chip Package

DESCRIPTION

The DS1615 is an integrated temperature recorder that combines a real time clock with temperature data

logging and histogram capabilities.

It 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 simply 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.

OVERVIEW

The block diagram in Figure 1 shows the relationship between the major control and memory sections of

the DS1615. The device has five major data components: 1) Real Time Clock and control block, 2)

32-byte User NV RAM with 64-bit lasered serial number, 3) 96 bytes of Alarm event/duration memory,

4) 128 bytes of histogram RAM, and 5) 2048 bytes of datalog memory. All memory is arranged in a

single linear address space.