Datasheet

© 2007 Microchip Technology Inc. DS21919E-page 29
MCP23008/MCP23S08
FIGURE 2-6: SPI OUTPUT TIMING
CS
SCK
SO
8
13
MSb out
LSb out
2
14
don’t care
SI
Mode 1,1
Mode 0,0
9
12
TABLE 2-3: SPI INTERFACE AC CHARACTERISTICS
SPI Interface 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)
Param
No.
Characteristic Sym Min Typ Max Units Conditions
Clock Frequency FCLK — — 5 MHz 1.8V – 5.5V (I-Temp)
— — 10 MHz 2.7V – 5.5V (I-Temp)
— — 10 MHz 4.5V – 5.5V (E-Temp)
1CS
Setup Time TCSS 50 — — ns
2CS
Hold Time TCSH 100 — — ns 1.8V – 5.5V (I-Temp)
50 — — ns 2.7V – 5.5V (I-Temp)
50 — — ns 4.5V – 5.5V (E-Temp)
3CS
Disable Time TCSD 100 — — ns 1.8V – 5.5V (I-Temp)
50 — — ns 2.7V – 5.5V (I-Temp)
50 — — ns 4.5V – 5.5V (E-Temp)
4 Data Setup Time T
SU 20 — — ns 1.8V – 5.5V (I-Temp)
10 — — ns 2.7V – 5.5V (I-Temp)
10 — — ns 4.5V – 5.5V (E-Temp)
5 Data Hold Time T
HD 20 — — ns 1.8V – 5.5V (I-Temp)
10 — — ns 2.7V – 5.5V (I-Temp)
10 — — ns 4.5V – 5.5V (E-Temp)
6 CLK Rise Time T
R —— 2 µsNote 1
7 CLK Fall Time T
F —— 2 µsNote 1
8 Clock High Time T
HI 90 — — ns 1.8V – 5.5V (I-Temp)
45 — — ns 2.7V – 5.5V (I-Temp)
45 — — ns 4.5V – 5.5V (E-Temp)
Note 1: This parameter is characterized, not 100% tested.
2: T
V = 90 ns (max) when address pointer rolls over from address 0x0A to 0x00.