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5 / 18 page ISL12057 FN6755 Rev 2.00 Page 5 of 18 Sep 25, 2015 tAA SCL Falling Edge to SDA Output Data Valid SCL falling edge crossing 30% of VDD, until SDA exits the 30% to 70% of VDD window. 900 ns 10 tBUF Time the Bus Must Be Free Before the Start of a New Transmission SDA crossing 70% of VDD during a STOP condition, to SDA crossing 70% of VDD during the following START condition 1300 ns tLOW Clock LOW Time Measured at the 30% of VDD crossing 1300 ns tHIGH Clock HIGH Time Measured at the 70% of VDD crossing 600 ns tSU:STA START Condition Setup Time SCL rising edge to SDA falling edge. Both crossing 70% of VDD 600 ns tHD:STA START Condition Hold Time From SDA falling edge crossing 30% of VDD to SCL falling edge crossing 70% of VDD 600 ns tSU:DAT Input Data Setup Time From SDA exiting the 30% to 70% of VDD window, to SCL rising edge crossing 30% of VDD 100 ns tHD:DAT Input Data Hold Time From SCL falling edge crossing 30% of VDD to SDA entering the 30% to 70% of VDD window 0 900 ns tSU:STO STOP Condition Setup Time From SCL rising edge crossing 70% of VDD, to SDA rising edge crossing 30% of VDD 600 ns tHD:STO STOP Condition Hold Time From SDA rising edge to SCL falling edge. Both crossing 70% of VDD 600 ns tDH Output Data Hold Time From SCL falling edge crossing 30% of VDD, until SDA enters the 30% to 70% of VDD window 0 ns tR SDA and SCL Rise Time From 30% to 70% of VDD 20 + 0.1 x Cb 300 ns 9 tF SDA and SCL Fall Time From 70% to 30% of VDD 20 + 0.1 x Cb 300 ns 9, 10 Cb Capacitive Loading of SDA or SCL Total on-chip and off-chip 10 400 pF 9 Rpu SDA and SCL Bus Pull-Up Resistor Off-Chip Maximum is determined by tR and tF For Cb = 400pF, max is about 2k to~2.5k. For Cb = 40pF, max is about 15k to ~20k 1 k 9 NOTES: 6. IRQ1/FOUT inactive. 7. Typical values are for T = +25°C and 3.3V supply voltage. 8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. 9. These are I2C specific parameters and are not production tested; however, they are used to set conditions for testing devices to validate specification. 10. Parts will work with SDA pull-up voltage above the VPULLUP limit but the tAA and tFin the I2C parameters are not guaranteed. 11. Specified at +25°C. Serial Interface Specifications Over the recommended operating conditions unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) SYMBOL PARAMETER TEST CONDITIONS MIN (Note 8) TYP (Note 7) MAX (Note 8) UNITS NOTES |
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