Datasheet

MCP23017/MCP23S17
DS20001952C-page 6  2005-2016 Microchip Technology Inc.
FIGURE 1-3: I
2
C BUS START/STOP BITS TIMING
FIGURE 1-4: I
2
C BUS DATA TIMING
TABLE 1-3: I
2
C BUS DATA REQUIREMENTS
I
2
C Interface AC Characteristics: Unless otherwise noted, 1.8V V
DD
 5.5V at -40C  T
A
 +125C, R
PU
(SCL,
SDA) = 1 k, C
L
(SCL, SDA) = 135 pF
Param.
No.
Characteristic Sym. Min. Typ. Max. Units Conditions
100 Clock High Time: T
HIGH
100 kHz mode 4.0 — — µs 1.8V – 5.5V
400 kHz mode 0.6 — — µs 2.7V – 5.5V
1.7 MHz mode 0.12 — — µs 4.5V – 5.5V
101 Clock Low Time: T
LOW
100 kHz mode 4.7 — — µs 1.8V – 5.5V
400 kHz mode 1.3 — — µs 2.7V – 5.5V
1.7 MHz mode 0.32 — — µs 4.5V – 5.5V
102 SDA and SCL Rise Time: T
R
(1)
100 kHz mode — — 1000 ns 1.8V – 5.5V
400 kHz mode 20 + 0.1 C
B
(2)
— 300 ns 2.7V – 5.5V
1.7 MHz mode 20 — 160 ns 4.5V – 5.5V
103 SDA and SCL Fall Time: T
F
(1)
100 kHz mode — — 300 ns 1.8V – 5.5V
400 kHz mode 20 + 0.1 C
B
(2)
— 300 ns 2.7V – 5.5V
1.7 MHz mode 20 — 80 ns 4.5V – 5.5V
Note 1: This parameter is characterized, not 100% tested.
2: C
B
is specified to be from 10 to 400 pF.
91
93
SCL
SDA
Start
Condition
Stop
Condition
90
92
90
91 92
100
101
103
106
107
109
109
110
102
SCL
SDA
In
SDA
Out