Datasheet
© 2007 Microchip Technology Inc. DS21919E-page 27
MCP23008/MCP23S08
TABLE 2-2: I
2
C™ BUS DATA REQUIREMENTS
I
2
C™ AC Characteristics
Operating Conditions (unless otherwise indicated):
1.8V ≤ V
DD ≤ 5.5V at -40°C ≤ TA ≤ +85°C (I-Temp)
4.5V ≤ V
DD ≤ 5.5V at -40°C ≤ TA ≤ +125°C (E-Temp) (Note 1)
RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF
Param
No.
Characteristic Sym Min Typ Max Units Conditions
100 Clock High Time: THIGH
100 kHz mode 4.0 — — µs 1.8V – 5.5V (I-Temp)
400 kHz mode 0.6 — — µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0.12 — — µs 4.5V – 5.5V (E-Temp)
101 Clock Low Time: T
LOW
100 kHz mode 4.7 — — µs 1.8V – 5.5V (I-Temp)
400 kHz mode 1.3 — — µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0.32 — — µs 4.5V – 5.5V (E-Temp)
102 SDA and SCL Rise Time: T
R
(Note 1)
100 kHz mode — — 1000 ns 1.8V – 5.5V (I-Temp)
400 kHz mode 20 + 0.1 C
B
(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: T
F
(Note 1)
100 kHz mode — — 300 ns 1.8V – 5.5V (I-Temp)
400 kHz mode 20 + 0.1 C
B
(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: T
SU:STA
100 kHz mode 4.7 — — µs 1.8V – 5.5V (I-Temp)
400 kHz mode 0.6 — — µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0.16 — — µs 4.5V – 5.5V (E-Temp)
91 START Condition Hold Time: T
HD:STA
100 kHz mode 4.0 — — µs 1.8V – 5.5V (I-Temp)
400 kHz mode 0.6 — — µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0.16 — — µs 4.5V – 5.5V (E-Temp)
106 Data Input Hold Time: T
HD:DAT
100 kHz mode 0 — 3.45 µs 1.8V – 5.5V (I-Temp)
400 kHz mode 0 — 0.9 µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0 — 0.15 µs 4.5V – 5.5V (E-Temp)
107 Data Input Setup Time: T
SU: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 — — µs 4.5V – 5.5V (E-Temp)
92 STOP Condition Setup Time: T
SU:STO
100 kHz mode 4.0 — — µs 1.8V – 5.5V (I-Temp)
400 kHz mode 0.6 — — µs 2.7V – 5.5V (I-Temp)
1.7 MHz mode 0.16 — — µs 4.5V – 5.5V (E-Temp)
Note 1: This parameter is characterized, not 100% tested.
2: C
B is specified to be from 10 to 400 pF.