MAX31889 ±0.25°C Accurate I2C Temperature Sensor Electrical Characteristics (continued) (VDD = 1.8V, TA = +25°C, minimum and maximum limits are from TA = -40°C to +125°C, unless otherwise noted. (Note 1)) PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSI2C INTERFACE / TIMING CHARACTERISTICS (Note 2) I2C Write Address GPIO1 = GPIO0 = 0V. See Table 3 A0 Hex I2C Read Address GPIO1 = GPIO0 = 0V. See Table 3 A1 Hex Serial Clock Frequency fSCL 0 400 kHz Bus Free Time Between STOP and START tBUF 1.3 µs Conditions Hold Time START and Repeat START tHD_STA 0.6 µs Condition SCL Pulse-Width Low tLOW 1.3 µs SCL Pulse-Width High tHIGH 0.6 µs Setup Time for a Repeated START tSU_STA 0.6 µs Condition Data Hold Time tHD_DAT 0 900 ns Data Setup Time tSU_DAT 100 ns Setup Time for STOP t Condition SU_STO 0.6 µs Pulse Width of t Suppressed Spike SP 50 ns Bus Capacitance CB 400 pF SDA and SCL Receiving 20 + t 300 ns Rise Time R 0.1CB SDA and SCL Receiving 20 + t 300 ns Fall Time F 0.1CB SDA Transmitting Fall 20 + t 300 ns Time TF 0.1CB Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design and characterization. Note 2: For design guidance only. Not production tested. 19-100693 www.maximintegrated.com Maxim Integrated | 4 Document Outline General Description Applications Benefits and Features Simplified Block Diagram Absolute Maximum Ratings Package Information μDFN Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configuration μDFN Pin Description Functional Diagrams Detailed Description Operation Measuring Temperature Alarm Signaling GPIO I2C I2C Slave Address I2C/SMBus Compatible Serial Interface Detailed I2C Timing Diagram Bit Transfer START and STOP Conditions Early STOP Conditions Acknowledge Bit I2C Write Data Format I2C Read Data Format FIFO Description Register Map Register Map Register Details STATUS (0x0) INTERRUPT ENABLE (0x1) FIFO WRITE POINTER (0x04) FIFO READ POINTER (0x05) FIFO OVERFLOW COUNTER (0x06) FIFO DATA COUNTER (0x07) FIFO DATA (0x08) FIFO CONFIGURATION 1 (0x09) FIFO CONFIGURATION 2 (0x0A) SYSTEM CONTROL (0x0C) ALARM HIGH MSB (0x10) ALARM HIGH LSB (0x11) ALARM LOW MSB (0x12) ALARM LOW LSB (0x13) TEMP SENSOR SETUP (0x14) GPIO SETUP (0x20) GPIO CONTROL (0x21) ROM ID 1 (0x31) ROM ID 2 (0x32) ROM ID 3 (0x33) ROM ID 4 (0x34) ROM ID 5 (0x35) ROM ID 6 (0x36) PART IDENTIFIER (0xFF) Applications Information Measurement Considerations Typical Application Circuit Ordering Information Revision History
