4.4 AC Characteristics

Table 4-3. AC Characteristics(1)
ParameterSymbolStandard ModeFast ModeFast Mode PlusUnits
VCC = 1.7V to 5.5VVCC = 1.7V to 5.5VVCC = 2.5V to 5.5V
Min.Max.Min.Max.Min.Max.
Clock Frequency, SCLfSCL—100—400—1000kHz
Clock Pulse Width LowtLOW4,700—1,300—500—ns
Clock Pulse Width HightHIGH4,000—600—400—ns
Input Filter Spike Suppression (SCL,SDA)(2)tI—100—100—50ns
Clock Low to Data Out ValidtAA—4,500—900—450ns
Bus Free Time between Stop and Start(2)tBUF4,700—1,300—500—ns
Start Hold TimetHD.STA4,000—600—250—ns
Start Set-up TimetSU.STA4,700—600—250—ns
Data In Hold TimetHD.DAT0—0—0—ns
Data In Set-up TimetSU.DAT200—100—100—ns
Inputs Rise Time(1)tR—1,000—300—100ns
Inputs Fall Time(1)tF—300—300—100ns
Stop Condition Set-up TimetSU.STO4,700—600—250—ns
Write-Protect Setup TimetSU.WP4,000—600—250—ns
Write-Protect Hold TimetHD.WP4,000—600—250—ns
Data Out Hold TimetDH100—50—50—ns
Write Cycle TimetWR—10— 10—10ms
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