iButton Temperature Loggers DS1922L/DS1922T with 8KB Datalog Memory 512 Bytes of General-Purpose Memory Plus General Description 64 Bytes of Calibration Memory The iButton temperature loggers (DS1922L/DS1922T) Two-Level Password Protection of All Memory and are rugged, self-sufficient systems that measure tempera- Configuration Registers ture and record the result in a protected memory section. The recording is done at a user-defined rate. A total of Individually Calibrated in a NIST-Traceable 8192 8-bit readings or 4096 16-bit readings, taken at Chamber equidistant intervals ranging from 1s to 273hr, can be Complies to Standard EN12830 stored. Additionally, 512 bytes of SRAM store application- Rugged Construction Survives Harsh Environments specific information and 64 bytes store calibration data. A Water Resistant Enclosure (IP56) or Waterproof if mission to collect data can be programmed to begin Placed Inside DS9107 iButton Capsule (Exceeds immediately, after a user-defined delay, or after a tempera- Water Resistant 3 ATM Requirements) ture alarm. Access to the memory and control functions CE, FCC, and UL913 Certifications can be password protected. The DS1922L/DS1922T are Simple Serial Port Interfaces to Most Microcontrollers configured and communicate with a host-computing for Rapid Data Transfer device through the serial 1-Wire protocol, which requires Communicates to Host with a Single Digital Signal only a single data lead and a ground return. Each DS1922L/DS1922T is factory lasered with a guaranteed Up to 15.4kbps at Standard Speed or Up to unique 64-bit registration number that allows for absolute 125kbps in Overdrive Mode Using 1-Wire Protocol traceability. The durable stainless-steel package is highly Quick Access to Alarmed Devices Through 1-Wire resistant to environmental hazards such as dirt, moisture, Conditional Search Function and shock. Accessories permit the DS1922L/DS1922T to be mounted on almost any object, including containers, Ordering Information pallets, and bags. PART TEMP RANGE PIN-PACKAGE Applications DS1922L-F5 -40C to +85C F5 Can High-Temperature Logging (Process Monitoring, DS1922T-F5 0C to +125C F5 Can Industrial Temperature Monitoring) Denotes a RoHS-compliant device that may include lead(Pb) Temperature Logging in Cold Chain, Food Safety, Bio that is exempt under the RoHS requirements. Science, and Pharmaceutical and Medical Products Benefits and Features Examples of Accessories High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and PART ACCESSORY Dissemination of Electronic Temperature Record DS9096P Self-Stick Adhesive Pad Temperature Accuracy of 0.5C from -10C to DS9101 Multipurpose Clip +65C (DS1922L), 0.5C from +20C to +75C DS9093RA Mounting Lock Ring (DS1922T), with Software Corrections DS9093A Snap-in FOB Measures Temperature with 8-Bit (0.5C) or 11-Bit DS9092 iButton Probe (0.0625C) Resolution Operating Temperature Range: DS1922L: -40C to +85C DS1922T: 0C to +125C Common iButton Device Features and Pin Configuration Automatically Wakes Up, Measures Temperature, appear at end of data sheet. and Stores Values in 8kB of Data-Log Memory in 8- or 16-Bit Format Sampling Rate from 1s Up to 273hr Programmable High and Low Trip Points for Temperature Alarms Programmable Recording Start Delay After Elapsed iButton and 1-Wire are registered trademarks of Maxim Time or Upon a Temperature Alarm Trip Point Integrated Products, Inc. 19-4990 Rev 13 3/15iButton Temperature Loggers DS1922L/DS1922T with 8KB Datalog Memory Absolute Maximum Ratings IO Voltage Range to GND........................................-0.3V to +6V Junction Temperature......................................................+150C IO Sink Current....................................................................20mA Storage Temperature Range* Operating Temperature Range DS1922L..........................................................-40C to +85C* DS1922L ...........................................................-40C to +85C DS1922T...........................................................0C to +125C* DS1922T ............................................................0C to +125C *Storage or operation above +50C significantly reduces battery life. 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 (V = +3.0V to +5.25V.) PUP PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DS1922L (Note 1) -40 +85 Operating Temperature T C A DS1922T (Note 1) 0 +125 IO PIN: GENERAL DATA 1-Wire Pullup Resistance R (Notes 2, 3) 2.2 k PUP Input Capacitance C (Note 4) 100 800 pF IO Input Load Current I IO pin at V 6 10 A L PUP High-to-Low Switching Threshold V (Notes 5, 6) 0.4 3.2 V TL Input Low Voltage V (Notes 2, 7) 0.3 V IL Low-to-High Switching Threshold V (Notes 5, 8) 0.7 3.4 V TH Switching Hysteresis V (Note 9) 0.09 N/A V HY Output Low Voltage V At 4mA (Note 10) 0.4 V OL Standard speed, R = 2.2k 5 PUP Overdrive speed, R = 2.2k 2 PUP Recovery Time (Note 2) t s REC Overdrive speed, directly prior to reset 5 pulse R = 2.2k PUP Rising-Edge Hold-Off Time t (Note 11) 0.6 2.0 s REH Standard speed 65 Time-Slot Duration (Note 2) t s SLOT Overdrive speed, V > 4.5V 8 PUP Overdrive speed (Note 12) 9.5 IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE Standard speed, V > 4.5V 480 720 PUP Standard speed (Note 12) 690 720 Reset Low Time (Note 2) t s RSTL Overdrive speed, V > 4.5V 48 80 PUP Overdrive speed (Note 12) 70 80 Standard speed, V > 4.5V 15 60 PUP Presence-Detect High Time t s Standard speed (Note 12) 15 63.5 PDH Overdrive speed (Note 12) 2 7 Standard speed, V > 4.5V 1.5 5 PUP Presence-Detect Fall Time t s Standard speed 1.5 8 FPD (Note 13) Overdrive speed 0.15 1 www.maximintegrated.com Maxim Integrated 2