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MAX31790 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX31790 Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 43 page  Fan Control Characteristics (TA = -40°C to +125°C, typical values are VCC = 3.3V, TA = +25°C, unless otherwise noted.) (Note 3) I2C AC Electrical Characteristics (VCC = +3.0V to +5.5V, TA = -40°C to +125°C, timing referenced to VIL(MAX) and VIH(MIN), unless otherwise noted.) (Notes 3, 8) (Figure 1) www.maximintegrated.com Maxim Integrated │ 3 MAX31790 6-Channel PWM-Output Fan RPM Controller PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Serial Clock Frequency fSCL DC 400 kHz Bus Free Time Between STOP and START Conditions tBUF 1.3 F s START Condition Hold Time tHD:STA 0.6 F s STOP Condition Setup Time tSU:STO 90% of SCL to 10% of SDA 600 ns Clock Low Period tLOW 1.3 F s Clock High Period tHIGH 0.6 F s START Condition Setup Time tSU:STA 90% of SCL to 90% of SDA 100 ns Data Setup Time tSU:DAT 10% of SDA to 10% of SCL 100 ns Data In Hold Time tHD:DAT 10% of SCL to 10% of SDA (Note 9) 0 0.9 F s Maximum Receive SCL/SDA Rise Time tR (Note 10) 300 ns Minimum Receive SCL/SDA Rise Time tR (Note 10) 20 + 0.1 x CB ns PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS PWM Resolution 9 9 Bits PWM Frequency Accuracy -6 +6 % TACH Count Resolution 11 11 Bits TACH Count Oscillator and CLKOUT Clock fTOSC (Note 7) 32.768 kHz TACH Count Oscillator and CLKOUT Accuracy (Note 7) fERR:TOSC Using internal oscillator: TA = +25°C, VCC = 3.3V -0.5 +0.5 % Using internal oscillator: 0 °C < TA < +70°C, 3.0V < VCC < 3.6V -2.5 +2.5 Using internal oscillator: -40 °C < TA < +125°C, 3.0V < VCC < 3.6V -4.0 +4.0 Using internal oscillator: -40 °C < TA < +125°C, 3.0V < VCC < 5.5V -7.0 +7.0 Using external crystal -0.1 +0.1 TACH Minimum Input Pulse Width tTACHMIN Pulse width must be greater than this value to be detected 25 75 F s |
Similar Part No. - MAX31790_15 |
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Similar Description - MAX31790_15 |
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