MCP23S09 Microchip Technology, MCP23S09 Datasheet - Page 10
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MCP23S09
Manufacturer Part Number
MCP23S09
Description
8-Bit I/O Expander
Manufacturer
Microchip Technology
Datasheet
1.MCP23S09.pdf
(50 pages)
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MCP23009/MCP23S09
FIGURE 1-3:
DS22121B-page 10
Assume:
n = A2, A1, A0 in opcode
ratio = R2/(R1+R2)
V2 = voltage on ADDR pin
V2(min) = V2 - (VDD/8) x %tolerance
V2(max) = V2 + (VDD/8) x %tolerance
n
n
n
n
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
VOLTAGE AND CODE EXAMPLE
R2=2n+1
R2=2n+1
R2=2n+1
R2=2n+1
11
13
15
11
13
15
11
13
15
11
13
15
1
3
5
7
9
1
3
5
7
9
1
3
5
7
9
1
3
5
7
9
R1=16-R2 R2/(R1+R2)
R1=16-R2 R2/(R1+R2)
R1=16-R2 R2/(R1+R2)
R1=16-R2
15
13
11
15
13
11
15
13
11
15
13
11
9
7
5
3
1
9
7
5
3
1
9
7
5
3
1
9
7
5
3
1
R2/(R1+R2)
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375
0.0625
0.1875
0.3125
0.4375
0.5625
0.6875
0.8125
0.9375
VDD= 1.8
VDD= 2.7
VDD= 5.5
VDD= 3.3
V2
V2
V2
V2
0.113
0.338
0.563
0.788
1.013
1.238
1.463
1.688
0.169
0.506
0.844
1.181
1.519
1.856
2.194
2.531
0.344
1.031
2.406
3.094
3.781
4.469
5.156
0.206
0.619
1.031
1.444
1.856
2.269
2.681
3.094
1.719
10% Tolerance (total)
10% Tolerance (total)
10% Tolerance (total)
V2(min)
V2(min)
V2(min)
10% Tolerance (total)
V2(min)
0.00
0.32
0.54
0.77
0.99
1.22
1.44
1.67
0.00
0.48
0.82
1.16
1.50
1.83
2.17
2.51
0.00
1.01
1.70
2.38
3.07
3.76
4.45
5.13
0.00
0.60
1.01
1.42
1.83
2.25
2.66
3.07
© 2009 Microchip Technology Inc.
V2(max)
V2(max)
V2(max)
V2(max)
0.14
0.36
0.59
0.81
1.04
1.26
1.49
1.80
0.19
0.53
0.87
1.20
1.54
1.88
2.22
2.70
0.37
1.05
1.74
2.43
3.12
3.80
4.49
5.50
0.23
0.64
1.05
1.47
1.88
2.29
2.70
3.30