Datasheet MAX31889 (Maxim) - 7

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Pin Configuration μDFN
TOP VIEW MAX31889 GPIO0 1 6 VDD SCL 2 5 GND SDA 3 4 GPIO1 2mm x 2mm
Pin Description PIN NAME FUNCTION
General Purpose Input/Output 0. Programmable digital input or output. State at each I2C start 1 GPIO0 condition can be used to configure I2C addresses. See Table 1 and Table 2. Can be configured as an interrupt output. 2 SCL SCL Input. I2C Clock. 3 SDA SDA Input/Output. I2C Data I/O. General Purpose Input/Output 1. State at each I2C start condition can be used to configure I2C 4 GPIO1 addresses (see Table 1 and Table 2). Can be configured to act as an external temperature convert input. 5 GND Ground. 6 VDD Power Supply Input. A 100nF capacitor connected between VDD and GND is recommended.
Functional Diagrams
1.7V to 3.6V MAX31889 RSDA RSCL VDD 4.7kΩ 4.7kΩ GPIO1 SDA CONTROL SDA LOGIC GPIO0 I2C INTERFACE SCL MCU SCL REGISTERS TEMP GND VDD GND SENSOR CVDD 0.1µF 19-100693 www.maximintegrated.com Maxim Integrated | 7 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