MCP433X/435X
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in
Additional descriptions of the device pins follows.
TABLE 3-1:
TSSOP
14L
—
1
2
3
4
5
6
7
8
—
—
9
10
—
—
11
12
13
14
—
—
Legend:
20L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
—
PINOUT DESCRIPTION FOR THE MCP433X/435X
Pin
QFN
20L
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
21
Symbol
P3A
P3W
P3B
CS
SCK
SDI
V
SS
P1B
P1W
P1A
P0A
P0W
P0B
NC
RESET
SDO
V
DD
P2B
P2W
P2A
EP
I/O
A
A
A
I
I
I
—
A
A
A
A
A
A
I
I
O
—
A
A
A
—
Buffer
Type
Analog
Analog
Analog
HV w/ST
HV w/ST
HV w/ST
P
Analog
Analog
Analog
Analog
Analog
Analog
I
HV w/ST
O
P
Analog
Analog
Analog
—
Weak
Pull-up/
down
No
No
No
“smart”
“smart”
“smart”
—
No
No
No
No
No
No
—
Yes
No
—
No
No
No
—
Standard Function
Potentiometer 3 Terminal A
Potentiometer 3 Wiper Terminal
Potentiometer 3 Terminal B
SPI Chip Select Input
SPI Clock Input
SPI Serial Data Input
Ground
Potentiometer 1 Terminal B
Potentiometer 1 Wiper Terminal
Potentiometer 1 Terminal A
Potentiometer 0 Terminal A
Potentiometer 0 Wiper Terminal
Potentiometer 0 Terminal B
No Connect
Hardware Reset Pin
SPI Serial Data Output
Positive Power Supply Input
Potentiometer 2 Terminal B
Potentiometer 2 Wiper Terminal
Potentiometer 2 Terminal A
Exposed Pad.
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
The pin’s “smart” pull-up shuts off while the pin is forced low. This is done to reduce the standby and
shutdown current.
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
V
SS
pin.
Note 1:
2:
2010 Microchip Technology Inc.
DS22242A-page 37
MICROCHIP [ MICROCHIP TECHNOLOGY ]
