4.4 AC Characteristics

Table 4-3. AC Characteristics(1)
ParameterSymbolFast ModeFast Mode PlusUnits
VCC = 1.7V to 2.5VVCC = 1.7V to 5.5V
MinimumMaximumMinimumMaximum
Clock Frequency, SCLfSCL—400—1000kHz
Clock Pulse Width LowtLOW1300—500—ns
Clock Pulse Width HightHIGH600—400—ns
Noise Suppression Time(2)tI—100—50ns
Clock Low to Data Out ValidtAA5090050450ns
Bus Free Time between Stop and Start(2)tBUF1300—500—ns
Start Hold TimetHD.STA600—250—ns
Start Set‑up TimetSU.STA600—250—ns
Data In Hold TimetHD.DAT0—0—ns
Data In Set‑up TimetSU.DAT100—100—ns
Inputs Rise Time(2)tR—300—300ns
Inputs Fall Time(2)tF—300—100ns
Stop Set-up TimetSU.STO600—250—ns
Data Out Hold TimetDH50—50—ns
Write Cycle TimetWR—5—5ms
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 VCC to 0.7 VCC
    • Input rise and fall times: ≤ 50 ns
    • Input and output timing reference voltages: 0.5 x VCC
  2. This parameter is ensured by characterization and is not 100% tested.
Figure 4-1. Bus Timing