4.4 AC Characteristics

Table 4-3. AC Characteristics(1)
ParameterSymbolMin.Max.Units
Clock Frequency, SCLfSCL400kHz
Clock Pulse Width LowtLOW1,200ns
Clock Pulse Width HightHIGH600ns
Input Filter Spike SuppressiontI50ns
Clock Low to Data Out ValidtAA100900ns
Bus Free Time between Stop and StarttBUF1,300ns
Start Hold TimetHD.STA600ns
Start Set‑Up TimetSU.STA600ns
Data In Hold TimetHD.DAT0ns
Data In Set‑Up TimetSU.DAT100ns
Inputs Rise Time(2)tR300ns
Inputs Fall Time(2)tF300ns
Stop Set-Up TimetSU.STO600ns
Data Out Hold TimetDH50ns
Write Cycle TimetWR5ms
Note:
  1. AC measurement conditions:
    • CL: 100 pF
    • RPUP (SDA bus line pull-up resistor to VCC): 1.3 kΩ (400 kHz)
    • Input rise and fall times: ≤ 50 ns
    • Input and output timing reference voltages: 0.5 x VCC
    • Input pulse voltages: 0.3 x VCC to 0.7 x VCC
  2. This parameter is characterized but is not 100% tested in production.
Figure 4-1. Bus Timing