iButton High-Temperature Logger DS1922E with 8KB Datalog Memory Simple Serial Port Interfaces to Most Microcontrollers General Description for Rapid Data Transfer The iButton high-temperature logger (DS1922E) is a Communicates to Host with a Single Digital Signal rugged, self-sufficient system that measures temperature Up to 15.4kbps at Standard Speed or Up to and records the result in a protected memory section. The 125kbps in Overdrive Mode Using 1-Wire Protocol recording is done at a user-defined rate. A total of 8192 8- Quick Access to Alarmed Devices Through 1-Wire bit readings or 4096 16-bit readings, taken at equidistant Conditional Search Function intervals ranging from 1s to 273hr, can be stored. Additionally, 576 bytes of SRAM store application-specific Common iButton Device Features information. A mission to collect data can be programmed to begin immediately, after a user-defined delay, or after a Rugged Chip-Based Data Carrier with Fast, Simple temperature alarm. Access to the memory and control Access to Information functions can be password protected. The DS1922E is Digital Identification and Information by Momentary configured and communicates with a host-computing Contact device through the serial 1-Wire protocol, which requires Unique Factory-Lasered 64-Bit Registration Number only a single data lead and a ground return. Every Ensures Error-Free Device Selection and Absolute DS1922E is factory lasered with a guaranteed unique 64- Traceability Because No Two Parts Are Alike bit registration number that allows for absolute traceability. Built-In Multidrop Controller for 1-Wire Net The durable stainless-steel package is highly resistant to Chip-Based Data Carrier Compactly Stores environmental hazards such as dirt, moisture, and shock. Information Data Can Be Accessed While Affixed to an Object Application Button Shape is Self-Aligning with Cup-Shaped High-Temperature Logging (Process Monitoring, Probes Durable Stainless-Steel Case Engraved with Industrial Temperature Monitoring) Registration Number Withstands Harsh Environments Steam Sterilization Easily Affixed with Self-Stick Adhesive Backing, Latched by Its Flange, or Locked with a Ring Benefits and Features Pressed Onto Its Rim High Accuracy, Full-Featured Digital Temperature Presence Detector Acknowledges When Reader Logger Simplifies Temperature Data Collection and First Applies Voltage Dissemination of Electronic Temperature Record Temperature Accuracy: 1.5C from +110C to Ordering Information +140C, 7C typical from +15C to +110C Measures Temperature with 8-Bit (0.5C) or 11-Bit PART TEMP RANGE PIN-PACKAGE (0.0625C) Resolution DS1922E-F5 +15C to +140C F5 Can Operating Temperature Range: +15C to +140C Denotes a RoHS-compliant device that may include lead(Pb) Automatically Wakes Up, Measures Temperature, that is exempt under the RoHS requirements. and Stores Values in 8KB of Data-Log Memory in 8- or 16-Bit Format Sampling Rate from 1s Up to 273hr Examples of Accessories Programmable High and Low Trip Points for Temperature Alarms PART ACCESSORY Programmable Recording Start Delay After Elapsed DS9093RA Mounting Lock Ring Time or Upon a Temperature Alarm Trip Point DS9107 iButton Capsule 576 Bytes of General-Purpose Memory DS9490B USB to 1-Wire Adapter Two-Level Password Protection of All Memory and Configuration Registers Rugged Construction Survives Harsh Environments Pin Configuration appears at end of data sheet. Water Resistant or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant iButton and 1-Wire are registered trademarks of Maxim 3 ATM Requirements) Integrated Products, Inc. 19-4646 Rev 7 7/17iButton High-Temperature Logger DS1922E with 8KB Datalog Memory Absolute Maximum Ratings I/O Voltage Range to GND.......................................-0.3V to +6V Junction Temperature......................................................+150C I/O Sink Current...................................................................20mA Storage Temperature Range............................-25C to +140C* Operating Temperature Range ........................+15C to +140C *Storage or operation above +50C significantly reduces battery life with an upper limit of 300hr cumulative at +140C. The recom- mended storage temperature for maximum battery lifetime is between +5C and +35C. 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, unless otherwise noted.) PUP PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Temperature T DS1922E (Note 1) +15 +140 C A I/O 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 I/O 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 Recovery Time PUP tREC s (Note 2) 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 Overdrive speed, V > 4.5V 8 s SLOT PUP Overdrive speed (Note 12) 9.5 I/O PIN 1-Wire RESET, PRESENCE-DETECT CYCLE Standard speed, VPUP > 4.5V 480 720 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 Standard speed (Note 12) 15 63.5 s PDH Overdrive speed (Note 12) 2 7 ( www.maximintegrated.com Maxim Integrated 2 2 9 120 O 1 ( 15 W 1.95 15 - ( 1.95 - R 15 ( 1.95 S +60 ppm T 75 C m ( 600 130 s + 7 C +1.5 300 Cycles O 300 Hours