4.4 AC Characteristics

Table 4-3. AC Characteristics(1)
ParameterSymbolStandard ModeFast ModeFast Mode PlusUnits
VCC = 1.7V to 3.6VVCC = 1.7V to 3.6VVCC = 1.7V to 3.6V
Min.Max.Min.Max.Min.Max.
Clock Frequency, SCLfSCL1004001000kHz
Clock Pulse Width LowtLOW4,7001,300500ns
Clock Pulse Width HightHIGH4,000600400ns
Input Filter Spike Suppression (SCL, SDA)(2)tI100100100ns
Clock Low to Data Out ValidtAA4,500900450ns
Bus Free Time between Stop and Start(2)tBUF4,7001,300500ns
Start Hold TimetHD.STA4,000600250ns
Start Set-Up TimetSU.STA4,700600250ns
Data In Hold TimetHD.DAT000ns
Data In Set-Up TimetSU.DAT200100100ns
Inputs Rise Time(2)tR1,000300100ns
Inputs Fall Time(2)tF300300100ns
Stop Set-Up TimetSU.STO4,700600250ns
Data Out Hold TimetDH1005050ns
Write Cycle TimetWR555ms
Note:  
  1. AC measurement conditions:
    • CL: 100 pF
    • RPUP (SDA bus line pull-up resistor to VCC): 1.3 kΩ (1000 kHz), 4 kΩ (400 kHz), 10 kΩ (100 kHz)
    • Input pulse voltages: 0.3 x VCC to 0.7 x VCC
    • Input rise and fall times: ≤50 ns 
    • Input and output timing reference voltages: 0.5 x VCC
  2. These parameters are determined through product characterization and are not 100% tested in production.
Figure 4-1.  Bus Timing