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MAX6890ETI Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX6890ETI Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 40 page EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors _______________________________________________________________________________________ 9 Pin Description (continued) PIN MAX6889 MAX6890 MAX6891 NAME FUNCTION 12 10 7 MR Manual Reset Input. MR is configurable to either assert PO_ into a programmed state or to have no effect on PO_ when driving MR low (see Table 6). Leave MR unconnected or connect to DBP if unused. MR is internally pulled up to DBP through a 10µA current source. 13 11 8 SDA Serial Data Input/Output (Open Drain). SDA requires an external pullup resistor. 14 12 9 SCL Serial Clock Input. SCL requires an external pullup resistor. 15 13 10 A0 Address Input 0. Address inputs allow up to four (MAX6889/MAX6890) or two (MAX6891) connections on one common bus. Connect A0 to GND or to the serial-interface power supply. 16 14 — A1 Address Input 1. Address inputs allow up to four MAX6889/MAX6890 connections on one common bus. Connect A1 to GND or to the serial-interface power supply. 17 15 — GPI4 General-Purpose Logic Input 4. An internal 10µA current source pulls GPI4 to GND. Configure GPI4 to control watchdog timer functions or the programmable outputs. 18 16 11 GPI3 General-Purpose Logic Input 3. An internal 10µA current source pulls GPI3 to GND. Configure GPI3 to control watchdog timer functions or the programmable outputs. 19 17 12 GPI2 General-Purpose Logic Input 2. An internal 10µA current source pulls GPI2 to GND. Configure GPI2 to control watchdog timer functions or the programmable outputs. 20 18 13 GPI1 General-Purpose Logic Input 1. An internal 10µA current source pulls GPI1 to GND. Configure GPI1 to control watchdog timer functions or the programmable outputs. 21 19 14 VCC Internal Power-Supply Voltage. Bypass VCC to GND with a 1µF ceramic capacitor. VCC supplies power to the internal circuitry. VCC is internally powered from the highest of the monitored IN1–IN5 voltages. Do not use VCC to supply power to external circuitry. To externally supply VCC, see the Powering the MAX6889/MAX6890/MAX6891 section. 22 20 15 DBP Internal Digital Power-Supply Voltage. Bypass DBP to GND with a 1µF ceramic capacitor. DBP supplies power to the EEPROM memory, the internal logic circuitry, and the programmable outputs. Do not use DBP to supply power to external circuitry. 23 — — IN8 High-Voltage Input 8. Configure IN8 to detect voltage thresholds from 2.5V to 15.25V in 50mV increments, or 1.25V to 7.625V in 25mV increments. For improved noise immunity, bypass IN8 to GND with a 0.1µF capacitor installed as close to the device as possible. 24 — — IN7 Voltage Input 7. Configure IN7 to detect voltage thresholds between 1V and 5.5V in 20mV increments, or 0.5V to 3.05V in 10mV increments. For improved noise immunity, bypass IN7 to GND with a 0.1µF capacitor installed as close to the device as possible. |
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