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MCP433X bảng dữ liệu(PDF) 37 Page - Microchip Technology

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 2010 Microchip Technology Inc.
DS22242A-page 37
MCP433X/435X
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
Additional descriptions of the device pins follows.
TABLE 3-1:
PINOUT DESCRIPTION FOR THE MCP433X/435X
Pin
Weak
Pull-up/
down
(Note 1)
Standard Function
TSSOP
QFN
Symbol
I/O
Buffer
Type
14L
20L
20L
—1
19
P3A
A
Analog
No
Potentiometer 3 Terminal A
12
20
P3W
A
Analog
No
Potentiometer 3 Wiper Terminal
23
1
P3B
A
Analog
No
Potentiometer 3 Terminal B
34
2
CS
I
HV w/ST
“smart” SPI Chip Select Input
45
3
SCK
I
HV w/ST
“smart” SPI Clock Input
56
4
SDI
I
HV w/ST
“smart” SPI Serial Data Input
67
5
VSS
—P
—
Ground
78
6
P1B
A
Analog
No
Potentiometer 1 Terminal B
89
7
P1W
A
Analog
No
Potentiometer 1 Wiper Terminal
—10
8
P1A
A
Analog
No
Potentiometer 1 Terminal A
—11
9
P0A
A
Analog
No
Potentiometer 0 Terminal A
912
10
P0W
A
Analog
No
Potentiometer 0 Wiper Terminal
10
13
11
P0B
A
Analog
No
Potentiometer 0 Terminal B
—14
12
NC
I
I
—
No Connect
—15
13
RESET
I
HV w/ST
Yes
Hardware Reset Pin
11
16
14
SDO
O
O
No
SPI Serial Data Output
12
17
15
VDD
—P
—
Positive Power Supply Input
13
18
16
P2B
A
Analog
No
Potentiometer 2 Terminal B
14
19
17
P2W
A
Analog
No
Potentiometer 2 Wiper Terminal
—20
18
P2A
A
Analog
No
Potentiometer 2 Terminal A
——
21
EP
—
—
—
Exposed Pad. (Note 2)
Legend:
HV w/ST = High Voltage tolerant input (with Schmitt trigger input)
A = Analog pins (Potentiometer terminals)
I = digital input (high Z)
O = digital output
I/O = Input / Output
P = Power
Note 1:
The pin’s “smart” pull-up shuts off while the pin is forced low. This is done to reduce the standby and
shutdown current.
2:
The QFN package has a contact on the bottom of the package. This contact is conductively connected to
the die substrate, and therefore should be unconnected or connected to the same ground as the device’s
VSS pin.



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