Y Y W W Z Z Z Design Support Resources Click here to ask an associate for production status of specific part numbers. Serial Number iButton DS1990A General Description Features The DS1990A serial number iButton is a rugged data Can Be Read in Less Than 5ms carrier that serves as an electronic registration number for Common iButton Features automatic identification. Data is transferred serially through Unique 64-Bit Registration Number Ensures Error- the 1-Wire protocol, which requires only a single data lead Free Device Selection and Absolute Traceability and a ground return. Every DS1990A has a unique 64-bit Because No Two Parts are Alike registration number that allows for absolute traceability. Built-In Multidrop Controller for 1-Wire Net The durable stainless-steel iButton package is highly resis- Digital Identification by Momentary Contact tant to environmental hazards such as dirt, moisture, and Data Can Be Accessed While Affixed to Object shock. Its compact coin-shaped profile is self-aligning with Economically Communicates to Bus Master with a mating receptacles, allowing the DS1990A to be used eas- Single Digital Signal at 16.3kbps ily by human operators. Accessories enable the DS1990A Button Shape is Self-Aligning with Cup-Shaped iButton to be mounted on almost any object, including con- Probes tainers, pallets, and bags. Durable Stainless-Steel Case Engraved with Registration Number Withstands Harsh Environments Applications Easily Affixed with Self-Stick Adhesive Backing, Access Control Latched by its Flange, or Locked with a Ring Work-in-Progress Tracking Pressed Onto its Rim Tool Management Inventory Control Pin Configurations Ordering Information F3 SIZE F5 SIZE PART TEMP RANGE PIN-PACKAGE 3.10mm 5.89mm 0.51mm 0.51mm BRANDING DS1990A-F5+ -40C to +85C F5 iButton DS1990A-F3+ -40C to +85C F3 iButton 16.25mm DS1990AA-F5+ -40C to +85C F5 iButton 89 01 DS1990AA-F3+ -40C to +85C F3 iButton 000000FBC52B 1-Wire +Denotes a lead(Pb)-free/RoHS-compliant package. 17.35mm IO IO Examples of Accessories GND GND PART ACCESSORY DS9096P Self-Stick Adhesive Pad F3 SIZE F5 SIZE DS9101 Multipurpose Clip 3.10mm 5.89mm 0.51mm BRANDING 0.51mm DS9093RA Mounting Lock Ring DS9093A Snap-In Fob 16.25mm DS9092 iButton Probe 89 01 000000FBC52B 1-Wire 17.35mm IO IO GND GND iButton and 1-Wire are registered trademarks of Maxim Integrated Products, Inc. 19-8145 Rev: 11/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved. D S 1 9 9 0 A + F 5 i DS1990A Serial Number iButton Absolute Maximum Ratings IO Voltage Range to GND ....................................-0.5V to +6.0V Junction Temperature ......................................................+125C IO Sink Current DS1990A ..................................................20mA Storage Temperature Range ............................ -55C to +125C IO Sink Current DS1990AA ..............................................10mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (Limits are 100% production tested at T = +25C and/or T = +85C. Limits over the operating temperature range and relevant supply A A voltage range are guaranteed by design and characterization. Typical values at +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IO PIN: GENERAL DATA DS1990A (Note 1) 2.8 6.0 V 1-Wire Pullup Voltage V PUP DS1990AA (Note 1) 3.0 5.25 V DS1990A (Notes 1 and 2) 0.6 5 k 1-Wire Pullup Resistance R PUP DS1990AA (Notes 1 and 2) 0.3 2.2 k DS1990A (Notes 3, 4, and 5) 100 800 pF Input Capacitance C IO DS1990AA (Notes 4 and 5) 1000 pF DS1990A (Note 6) 0.25 A Input Load Current I L DS1990AA IO pin at V (Note 6) 0.05 1.75 6.7 A PUP Input Low Voltage V (Notes 1 and 7) 0.3 V IL V DS1990A (Notes 4 and 8) 2.2 IH Input High Voltage V 0.75 x DS1990AA (Notes 4 and 8) V PUP Output Low Voltage V I = 4mA 0.4 V OL OL DS1990A (Note 1) 1 s Recovery Time t REC DS1990AA (Note 1) 5 s DS1990A (Note 1) 61 s Time Slot Duration t SLOT DS1990AA (Note 1) 65 s IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE DS1990A (Notes 1 and 9) 480 s Reset Low Time t RSTL DS1990AA (Note 1) 480 640 s Reset High Time t (Notes 1 and 10) 480 s RSTH Presence-Detect High Time t 15 60 s PDH Presence-Detect Low Time t (Note 11) 60 240 s PDL Presence-Detect Sample Time t (Note 1) 60 75 s MSP IO PIN: 1-Wire WRITE Write-Zero Low Time t (Notes 1 and 12) 60 120 s W0L Write-One Low Time t (Notes 1 and 12) 1 15 s W1L IO PIN: 1-Wire READ Read Low Time t (Notes 1 and 13) 1 15 - d s RL Read Sample Time t (Notes 1 and 13) t + d 15 s MSR RL Note 1: System requirement. Note 2: Full R range is guaranteed by design and simulation and not production tested. Production testing performed at a fixed PUP R value. Maximum allowable pullup resistance is a function of the number of 1-Wire devices in the system and 1-Wire PUP recovery times. The specified value here applies to systems with only one device and with the minimum 1-Wire recovery times. For more heavily loaded systems, an active pullup such as that found in the DS2480B may be required. Analog Devices 2 www.analog.com