2008 Microchip Technology Inc.
DS22107A-page 13
MCP454X/456X/464X/466X
FIGURE 1-1:
I2C Bus Start/Stop Bits Timing Waveforms.
TABLE 1-1:
I2C BUS START/STOP BITS REQUIREMENTS
I2C AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40
°C ≤ TA ≤ +125°C (Extended)
Param.
No.
Symbol
Characteristic
Min
Max
Units
Conditions
FSCL
Standard Mode
0
100
kHz
Cb = 400 pF, 1.8V - 5.5V
Fast Mode
0
400
kHz
Cb = 400 pF, 2.7V - 5.5V
High-Speed 1.7
0
1.7
MHz
Cb = 400 pF, 4.5V - 5.5V
High-Speed 3.4
0
3.4
MHz
Cb = 100 pF, 4.5V - 5.5V
D102
Cb
Bus capacitive
loading
100 kHz mode
—
400
pF
400 kHz mode
—
400
pF
1.7 MHz mode
—
400
pF
3.4 MHz mode
—
100
pF
90
TSU:STA
START condition
100 kHz mode
4700
—
ns
Only relevant for repeated
START condition
Setup time
400 kHz mode
600
—
ns
1.7 MHz mode
160
—
ns
3.4 MHz mode
160
—
ns
91
THD:STA
START condition
100 kHz mode
4000
—
ns
After this period the first
clock pulse is generated
Hold time
400 kHz mode
600
—
ns
1.7 MHz mode
160
—
ns
3.4 MHz mode
160
—
ns
92
TSU:STO
STOP condition
100 kHz mode
4000
—
ns
Setup time
400 kHz mode
600
—
ns
1.7 MHz mode
160
—
ns
3.4 MHz mode
160
—
ns
93
THD:STO
STOP condition
100 kHz mode
4000
—
ns
Hold time
400 kHz mode
600
—
ns
1.7 MHz mode
160
—
ns
3.4 MHz mode
160
—
ns
91
93
SCL
SDA
START
Condition
STOP
Condition
90
92