Datasheet

Signal description M24C64-DF, M24C64-W, M24C64-R, M24C64-F
10/43 Doc ID 16891 Rev 21
Figure 5. I
2
C Fast mode (f
C
= 400 kHz): maximum R
bus
value versus bus parasitic
capacitance (C
bus
)
Figure 6. I
2
C Fast mode Plus (f
C
= 1 MHz): maximum R
bus
value versus bus
parasitic capacitance (C
bus
)
1
10
100
10 100 1000
Bus line capacitor (pF)
Bus line pull-up resistor
(k
)
When t
LOW
= 1.3 µs (min value for
f
C
= 400 kHz), the R
bus
× C
bus
time constant must be below the
400 ns time constant line
represented on the left.
I²C bus
master
M24xxx
R
bus
V
CC
C
bus
SCL
SDA
ai14796b
R
bus
× C
bus
= 400 ns
Here R
bus
× C
bus
= 120 ns
4 kΩ
30 pF
1
10
100
10 100
Bus line capa citor (pF)
Bus line pull-up resistor (k )
ai14795d
I²C bus
master
M24xxx
R
bus
V
CC
C
bus
SCL
SDA
R
bus
× C
bus
= 270 ns
When t
LOW
= 700 ns
(max possible value for
f
C
= 1 MHz), the R
bus
× C
bus
time constant must be below
the 270 ns time constant line
represented on the left.
When t
LOW
= 400 ns
(min value for f
C
= 1 MHz),
the R
bus
× C
bus
time constant
must be below the 100 ns
time constant line represented
on the left.
Here,
R
bus
× C
bus
= 150 ns
R
bus
× C
bus
= 100 ns
5
30