2007 Microchip Technology Inc.
DS21919E-page 27
MCP23008/MCP23S08
TABLE 2-2:
I2C BUS DATA REQUIREMENTS
I2C AC Characteristics
Operating Conditions (unless otherwise indicated):
1.8V
≤ VDD ≤ 5.5V at -40°C ≤ TA ≤ +85°C (I-Temp)
4.5V
≤ VDD ≤ 5.5V at -40°C ≤ TA ≤ +125°C (E-Temp) (Note 1) RPU (SCL, SDA) = 1 k
Ω, CL (SCL, SDA) = 135 pF
Param
No.
Characteristic
Sym
Min
Typ
Max
Units Conditions
100
Clock High Time:
THIGH
100 kHz mode
4.0
—
s
1.8V – 5.5V (I-Temp)
400 kHz mode
0.6
—
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.12
—
s
4.5V – 5.5V (E-Temp)
101
Clock Low Time:
TLOW
100 kHz mode
4.7
—
s
1.8V – 5.5V (I-Temp)
400 kHz mode
1.3
—
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.32
—
s
4.5V – 5.5V (E-Temp)
102
SDA and SCL Rise Time:
TR
100 kHz mode
—
1000
ns
1.8V – 5.5V (I-Temp)
400 kHz mode
20 + 0.1 CB(2)
—
300
ns
2.7V – 5.5V (I-Temp)
1.7 MHz mode
20
—
160
ns
4.5V – 5.5V (E-Temp)
103
SDA and SCL Fall Time:
TF
100 kHz mode
—
300
ns
1.8V – 5.5V (I-Temp)
400 kHz mode
20 + 0.1 CB(2)
—
300
ns
2.7V – 5.5V (I-Temp)
1.7 MHz mode
20
—
80
ns
4.5V – 5.5V (E-Temp)
90
START Condition Setup Time:
TSU:STA
100 kHz mode
4.7
—
s
1.8V – 5.5V (I-Temp)
400 kHz mode
0.6
—
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.16
—
s
4.5V – 5.5V (E-Temp)
91
START Condition Hold Time:
THD:STA
100 kHz mode
4.0
—
s
1.8V – 5.5V (I-Temp)
400 kHz mode
0.6
—
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.16
—
s
4.5V – 5.5V (E-Temp)
106
Data Input Hold Time:
THD:DAT
100 kHz mode
0
—
3.45
s
1.8V – 5.5V (I-Temp)
400 kHz mode
0
—
0.9
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0
—
0.15
s
4.5V – 5.5V (E-Temp)
107
Data Input Setup Time:
TSU:DAT
100 kHz mode
250
—
ns
1.8V – 5.5V (I-Temp)
400 kHz mode
100
—
ns
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.01
—
s
4.5V – 5.5V (E-Temp)
92
STOP Condition Setup Time:
TSU:STO
100 kHz mode
4.0
—
s
1.8V – 5.5V (I-Temp)
400 kHz mode
0.6
—
s
2.7V – 5.5V (I-Temp)
1.7 MHz mode
0.16
—
s
4.5V – 5.5V (E-Temp)
Note 1: This parameter is characterized, not 100% tested.
2: CB is specified to be from 10 to 400 pF.