Tiny, Robust Computer Chip-Based Loggers Deliver High Accuracy and Low Cost Monitor: Temperature-Sensitive Shipments Manufacturing Processes Environmental Conditions World's Smallest, Most Rugged, Lowest Cost Family of Digital Data Loggers What is an iButton? An iButton® is a computer chip with a globally unique address, factory-lasered at time of manufacture (think of it as a URL for each iButton), enclosed in a 16mm stainless-steel case. iButtons can include read/write memory, real-time clocks, and temperature/humidity data loggers. They deliver or record data wherever needed. All this power and capability make iButtons ideal for a wide range of applications including environmental data logging, access control, eCash transactions, and asset tracking.
Tiny, Robust Computer Chip-Based Loggers Deliver High Accuracy and Low Cost Monitor: Temperature-Sensitive Shipments Manufacturing Processes Environmental Conditions World's Smallest, Most Rugged, Lowest Cost Family of Digital Data Loggers What is an iButton? An iButton® is a computer chip with a globally unique address, factory-lasered at time of manufacture (think of it as a URL for each iButton), enclosed in a 16mm stainless-steel case. iButtons can include read/write memory, real-time clocks, and temperature/humidity data loggers. They deliver or record data wherever needed. All this power and capability make iButtons ideal for a wide range of applications including environmental data logging, access control, eCash transactions, and asset tracking. The Globally Unique Tag– 281,000,000,000,000 Different Addresses! An iButton's 64-bit address provides a simple, secure way of identifying a location or an item. It can serve as an electronic serial number that is never duplicated. With onboard memory, iButtons can also store critical information about an item or location, such as container contents, shipping destination, or owner information. Rugged Durability That Lasts and Lasts! iButtons bring unparalleled durability to data logger applications. Expose it to high or low temperature extremes. Step on it. Drop it in water. There is no need to worry about destroying this data logger because iButtons can withstand harsh indoor or outdoor environments. The durable iButton can be reprogrammed and reused for many years, significantly reducing operating costs. iButtons–Simple, Low-Power Interface! iButtons require a physical/electrical connection to whatever is reading or writing data. However, a novel digital communication scheme called a 1-Wire® interface reduces the number of electrical contact points to just one, plus a ground reference. A single conductor for both power and data communications is all that is needed. Devices that read and write to iButtons have all their electrical components inside, with only the two electrical contact points exposed, separated by a wide gap. With the connection so simplified, you get very durable, dust- and moisture-immune probes that interface to most surfaces. An iButton reader draws virtually no power in standby mode and less than 2mA during communication–making it ideal for battery-powered devices such as handheld computers and PDAs. Reading an iButton's unique address takes no more than 5ms. Now users can finish their data collection tasks without having to worry about constantly changing batteries in their handheld device every few hours. 2 MAXIM is a registered trademark of Maxim Integrated Products, Inc. DALLAS is a registered trademark of Dallas Semiconductor. iButton, 1-Wire, and TINI are registered trademarks of Dallas Semiconductor. These stainless-steel encased data loggers can go practically anywhere. Minimal power requirements make iButtons idea for handheld and PDA data collection applications. 3 iButton Temperature and Humidity Data Loggers Address a Wide Variety of Applications Temperature Data Collection The DS1920 lets you measure and record the temperature at a specific location together with the unique address for that device. Temperature Data Loggers Our Thermochron® family of iButtons (DS1921/DS1922) are temperature data loggers that track the temperature of specific assets or locations. Now you can easily log the thermal exposure of an asset during shipment to see if it stays within specified temperature ranges. Thermochrons make it simple and inexpensive to monitor anything that is temperature sensitive, including pharmaceuticals (vaccines, drugs, reagents), fresh or frozen foods (fruits, vegetables, dairy/dessert products), biological items (animals, blood products, soil), or heating/refrigeration/freezer systems. The Thermochron could also be used for warranty-tracking purposes on equipment that must be kept within a certain temperature range or to log the results of a process that must be monitored for compliance to a temperature profile. Like all iButtons, the stainless-steel casing of a Thermochron makes it rugged, reusable, and portable. It is so small that it fits anywhere and can deliver years of reliable, highly accurate temperature readings. Temperature/Humidity Data Loggers Our HygrochronTM family of iButtons (DS1923) adds an embedded humidity sensor to the temperature-logging capability of the Thermochron family to create a data logger that records both temperature and humidity. With these two pieces of data, relative humidity can be logged as a function of time. The tiny opening in the lid of the Hygrochron iButton employs a special filter that allows water vapor to pass through and reach the internal humidity sensor, but repels liquid-phase water. For applications where both temperature and humidity are important (foods, chemicals, powders, HVAC systems), the Hygrochrons deliver unprecedented performance in an unbelievably compact size. iButton Data Logger Products Selection Guide DESCRIPTIONPART Thermochron is a registered trademark of Dallas Semiconductor. Hygrochron is a trademark of Dallas Semiconductor. PART TEMP RANGE MAX ACCURACY DATA LOG SIZE DS1921G-F5 -40°C to +85°C ±1°C (-30°C/+70°C) 2k points DS1921H-F5 +15°C to +46°C ±1°C 2k points DS1921Z-F5 -5°C to +26°C ±1°C 2k points DS1922L-F5 -40°C to +85°C ±0.5°C (-10°C/+65°C) 4k/8k points DS1922T-F5 0°C to +125°C ±0.5°C (+20°C/+100°C) 4k/8k points DS1923L-F5 -20°C to +85°C ±0.5°C, 5%RH 8k points (temp) 4k points (temp/RH) Temperature Data Loggers Temperature/Humidity Data Logger Temperature Sensor DS1920-F5 Enables user to collect current temperature upon contact with a reader. Digital thermometer, ±0.5°C accuracy (-55°C to +100°C) 4 Thermochrons Support Two Temperature Logging Modes Time/Temperature Mode Each Thermochron will log up to 2k (DS1921) or 8k (DS1922/DS1923) temperature readings before the logger memory is full. When the device is initialized, the user can configure it to terminate logging or roll over and begin writing over the oldest data points when the memory capacity is reached. If the logger is set to record a temperature every minute, the DS1921 memory will be full after approximately 1.4 days and the DS1922 after approximately 5.6 days. The example data to the right shows the partial log for a device monitoring a product kept at 15°C and the resulting time/temperature graph is below on the left. The change in temperature due to the refrigerator door being opened and then later closed is captured. Histogram Mode (DS1921 Only) A temperature histogram runs concurrently with the time/temperature logging for each DS1921 Thermochron. The histogram logs temperature occurrences into one of 64 different temperature ranges that are each approximately 2°C wide (ex. 22°C to 23.99°C, 24°C to 25.99°C, etc.). A counter is incremented for the corresponding range each time a measured temperature falls within that range. Using the same example data above, the result represented in histogram format would look like the graph on the right. Each range can increment up to 65536. If set to log every minute, the histogram counter would reach 65536 after approximately 44 days (even longer if the measured temperatures fall into multiple ranges, as in the example). Therefore, the histogram can be used in applications where total thermal exposure is important but the exact times that particular temperatures occurred is not. For example, it may be important to monitor a process and record the total number of minutes of exposure at various temperatures. In another type of application, the useful life of temperature-sensitive products may be extended significantly (and thus lower their effective costs) by storing them well below the maximum allowed temperature and using the histogram function to accurately determine the remaining life of the material. Time/Temperature Recording Mode 0 5 10 15 20 25 30 March21,10:05 March21,10:06 March21,10:07 March21,10:08 March21,10:09 March21,10:10 March21,10:11 March21,10:12 March21,10:13 March21,10:14 March21,10:15 March21,10:16 March21,10:17 March21,10:18 March21,10:19 March21,10:20 March21,10:21 March21,10:22 March21,10:23 March21,10:24 March21,10:25 March21,10:26 March21,10:27 March21,10:28 March21,10:29 March21,10:30 March21,10:31 March21,10:32 March21,10:33 March21,10:34 Date/Time Temperature(°C) Histogram Recording Mode 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 10.0 to 11.9 12.0 to 13.9 14.0 to 15.9 16.0 to 17.9 18.0 to 19.9 20.0 to 21.9 22.0 to 23.9 24.0 to 25.9 26.0 to 27.9 28.0 to 29.9 30.0 to 31.9 Temperature Ranges (°C) Count Time Temperature (°C) March 21, 10:05 14.5 March 21, 10:06 15 March 21, 10:07 15.5 March 21, 10:08 15 March 21, 10:09 15 March 21, 10:10 15.5 March 21, 10:11 15 March 21, 10:12 15.5 March 21, 10:13 16 March 21, 10:14 17.5 March 21, 10:15 18.5 March 21, 10:16 20 March 21, 10:17 23 March 21, 10:18 26 March 21, 10:19 24.5 March 21, 10:20 22 March 21, 10:21 21.5 March 21, 10:22 20.5 March 21, 10:23 20 March 21, 10:24 19.5 March 21, 10:25 18.5 March 21, 10:26 17 March 21, 10:27 16 March 21, 10:28 15.5 March 21, 10:29 15.5 March 21, 10:30 15 March 21, 10:31 15 March 21, 10:32 15.5 March 21, 10:33 15 March 21, 10:34 15.5 5 Turnkey Systems Available Dallas Semiconductor/Maxim has teamed with third-party systems integration experts around the world to combine the power of our iButton products with their market knowledge, systems expertise, and local support. Together with these independent companies we created a powerful suite of ready-to-use products. Our Authorized Solutions Developers (ASDs) already have developed turnkey iButton systems to address typical data-logging applications such as cold-chain shipping, process monitoring/quality control, and refrigerator/freezer system tracking. In addition, these developers can also design custom iButton software and/or hardware solutions. Review our partners and their products at www.iButton.com/solutions. If you're shipping highly sensitive products like pharmaceuticals, the shift of even a few degrees can mean the difference between delivering a safe, effective product and rendering it completely useless. Refrigeration/freezer systems that malfunction can cause significant financial loss if left unchecked. But temperature can be easily monitored by strategically placing Thermochrons or Hygrochrons throughout the areas which require accurate, yet potentially highly dispersed monitoring. When you attach a tiny Thermochron anywhere on your shipment, you will know whether the temperature environment changed during transit and by precisely how much. Using Thermochrons, companies are discovering that their quality goes up while their operating costs come down. Photo courtesy of Stanford Blood Center. · Application Note 126 (I/O port pin for 1-Wire) · Application Note 192 (Serial port + DS2480B bridge for 1-Wire) · Application Note 3684 (I2C port plus DS2482) · Some I/O port assembly examples in 1-Wire Public Domain (PD) Kit Interface Is Simple and Low Cost One-Touch Interface How do I communicate with an iButton? Interfacing an iButton to any type of electronics is easy. Information transfers between an iButton and a PC, PDA, a variety of handhelds, or a microcontroller with a momentary contact at up to 142kbps. Simply touch the iButton to a Blue DotTM receptor or other types of mating probes. 6 Microprocessor Documentation to add a 1-Wire port to a microprocessor. Some assembly examples available. If the microprocessor has a `C' compiler, the 1-Wire Public Domain code can be used. Any JavaTM platform (J2METM also available) 1-Wire API for Java Portable Java library. Supports both a serial port plus DS2480B bridge or custom 1-Wire interface. All 1-Wire adapters supported on the Windows platform. Any platform with a `C' compiler 1-Wire Public Domain Kit Portable `C' library. Supports both a serial port plus DS2480B bridge or custom 1-Wire interface. Many 1-Wire adapter and platform- specific example builds provided. Windows® 32 (XP, 2K, NT, ME, 98SE, 95) 1-Wire SDK* Windows programming language-independent library. Supports all 1-Wire adapter types with traditional API* (TMEX) and Windows .NET (OW.NET) interfaces. Windows 32 (XP, 2K, ME, 98SE) Software Authorization Portable `C' library for software developers to control unauthorized use of programs. Supports serial, parallel, and USB 1-Wire adapters. PLATFORM RESOURCE DESCRIPTION *Refer to Application Note 155: 1-Wire Software Resource Guide for an overview of all available APIs. For all iButton application notes and software tools visit www.maxim-ic.com/ibutton. For support, contact autoinfo.support@dalsemi.com. Blue Dot is a trademark of Dallas Semiconductor. Windows is a registered trademark of Microsoft Corporation. Java and J2ME are trademarks of Sun Microsystems. Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associate Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification defined by Philips. Free Software Development Tools Free iButton and other 1-Wire software development kits address different platforms and programming language preferences. Multiple application notes and papers reduce the development burden and help ensure your success. For PCs, we provide low-cost adapters for serial, parallel, and USB ports. For portable handhelds, see our website to examine the wide range of products available from our third party developers. iButtons–More Than Just Temperature/Humidity Data Loggers The iButton product family has over 20 different products that meet all application needs–temperature data logging, maintenance and inspection data management, guard-tour access control, device and software authorization, and eCash. Product Quickview PART DESCRIPTION Address Number Only DS1990A 64-bit ROM ID NV RAM Memory DS1992/3/5/6L 1kb/4kb/16kb/64kb NV RAM EEPROM Memory DS1971/2/3/7 256-bit/1kb/4kb/32kB EEPROM EPROM Memory DS1982/5/6 1kb/16kb/64kb EPROM Password-Protected Secure Memory DS1991L/DS1977 Three 384-bit partitions NV RAM/One 32kB partition EEPROM Challenge-and-Response DS1961S 1kb EEPROM with SHA-1 Secure Memory DS1963S 4kb NV RAM with SHA-1 and counters Real-Time Clock DS1904/DS1994L RTC/RTC with 4kb NV RAM Accessories Quickview COMM. PORT ADAPTERS DS9490R 1-Wire USB Adapter: 1-Wire to USB interface. Connects to all reader/probes with RJ-11 interface. DS9490B USB iButton Holder/Dongle: 1-Wire to USB interface. Designed for applications where iButton is infrequently removed from holder. DS9097U- Universal 1-Wire COM Port Adapter: 1-Wire to RS-232 COM port interface (DB9). Connects to all S09/009/E25 reader/probes with RJ-11 interface. 009 version includes DS2502 for ID. E25 version includes a 12V power port for writing to EPROM iButtons and comes in a DB25 package. PROBES/RECEPTORS (READER/WRITER INTERFACES) DS1402- Blue Dot Receptor Cable: iButton read/writer interface. iButtons communicate through Blue Dot interface DR8/DB8 with just a touch or can be snapped into the Blue Dot for continuous connection. DR8 has RJ-11 interface. DB8 has button interface. iButton Touch and Hold Probe Cable: iButton read/writer interface. iButtons communicate through probe DS1402RP8/BP8 with just a touch or can be snapped into the probe for continuous connection. DR8 has RJ-11 interface. DB8 has button interface. DS9092GT iButton Handheld Wand: Plastic wand with an integrated iButton probe, shaped to self-align with iButtons. Gives tactile feedback. The wand comes with a 10cm handle and a 1m cable that is terminated with an RJ-11 jack. DS9092/T/L Panel-Mount Probe: T version has tactile feedback. L version has LED and is recommended for outdoor use. DS1402D-041 Blue Dot probe component for embedded touch and hold applications. iButton MOUNTS DS9107 Capsules: Protect iButton loggers from moisture, solvents, and pressure. DS9093Ax/F/N Key Fobs: Allow an iButton to be carried conveniently on a key chain. Available in three different versions and five different colors. DS9093S/P Wall Mounts: Allow you to securely mount iButtons to most surfaces. Available in two versions. DS9096P iButton Adhesive Pads: Allow you to easily mount iButtons to anything. 7 Dallas Semiconductor iButton Product Group 4401 Beltwood Parkway Dallas, Texas 75244 Phone: 1-888-maxim-ic FAX: 972-371-3715 www.iButton.com Corporate Headquarters Maxim Integrated Products 120 San Gabriel Dr. Sunnyvale, California 94086 1-888-maxim-ic www.maxim-ic.com Visit Our Website to Find the Latest Information on iButtons– www.ibutton.com Get started todaywith our DS1921KThermochron Starter Kit. MAXIM is a registered trademark of Maxim Integrated Products, Inc. DALLAS is a registered trademark of Dallas Semiconductor Corp. © 2006 Maxim Integrated Products, Inc. All Rights Reserved. Rev. 3
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