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7 / 18 page ISL25700 FN6885 Rev 1.00 Page 7 of 18 July 23, 2014 tBUF (Note 11) Time the Bus Must be Free Before the Start of a New Transmission SDA crossing 70% of VI2C during a STOP condition, to SDA crossing 70% of VI2C during the following START condition 1300 ns tLOW Clock LOW Time Measured at the 30% of VI2C crossing 1300 ns tHIGH Clock HIGH Time Measured at the 70% of VI2C crossing 600 ns tSU:STA START Condition Setup Time SCL rising edge to SDA falling edge. Both crossing 70% of VI2C 600 ns tHD:STA START Condition Hold Time From SDA falling edge crossing 30% of VI2C to SCL falling edge crossing 70% of VI2C 600 ns tSU:DAT Input Data Setup Time From SDA exiting the 30% to 70% of VI2C window, to SCL rising edge crossing 30% of VI2C 100 ns tHD:DAT Input Data Hold Time From SCL falling edge crossing 70% of VI2C to SDA entering the 30% to 70% of VI2C window 0 ns tSU:STO STOP Condition Setup Time From SCL rising edge crossing 70% of VI2C, to SDA rising edge crossing 30% of VI2C 600 ns tDH Output Data Hold Time From SCL falling edge crossing 30% of VI2C, until SDA enters the 30% to 70% of VI2C window 0 ns tR SDA and SCL Rise Time From 30% to 70% of VI2C 20 + 0.1 * Cb 250 ns tF SDA and SCL Fall Time From 70% to 30% of VI2C 20 + 0.1 * Cb 250 ns Cb Capacitive Loading of SDA or SCL Total on-chip and off-chip 10 400 pF Rpu (Note 11) SDA and SCL Bus Pull-Up Resistor Off-Chip Maximum is determined by tR and tF. For Cb = 400pF, max is about 2~2.5k . For Cb = 40pF, max is about 15~20k 1 k tWC (Notes 11, 12) Non-Volatile Write Cycle Time 15 20 ms NOTES: 6. Typical values are for TA = +25°C and 12V supply voltage. 7. LSB: [VDAC255 – VDAC0]/255. VDAC255 and VDAC0 are the DAC output voltage when DAC register set to FF hex and 00 hex respectively. 8. DNL = [VDACi – VDACi-1]/LSB-1, for i = 1 to 255. i is the DAC register setting. 9. INL = [VDACi – (i • LSB + VDAC0)]/LSB for i = 1 to 255. 10. for i = 1 to 255 decimal, T = -40°C to +125°C, referenced to 40°C. 11. Limits established by characterization and are not production tested. 12. tWC is the time from a valid STOP condition at the end of a Write sequence of a I2C serial interface Write operation, to the end of the self-timed internal non-volatile write cycle. The Busy Polling method can be used to determine the end of the non-volatile write cycle. 13. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 14. B25/85 is a thermistor material specific constant; represents the slope of the Resistance vs. Temperature curve. Operating Specifications Over the recommended operating conditions unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued) SYMBOL PARAMETER TEST CONDITIONS MIN (Note 13) TYP (Note 6) MAX (Note 13) UNITS TCV VDACi T VDAC i 40°C – VDACi 40°C ------------------------------------------------------------------------- 106 T40 – °C ---------------------------- = |
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