MCP4431 Microchip Technology Inc., MCP4431 Datasheet - Page 39

• Manufacturer Part Number: MCP4431
• Description: 7/8-bit Volatile Quad Digital Pot With I 2c Interface
• Manufacturer: Microchip Technology Inc.

3.0
The descriptions of the pins are listed in
Additional descriptions of the device pins follows.
TABLE 3-1:
 2010 Microchip Technology Inc.
Legend: HV w/ST = High Voltage tolerant input (with Schmidtt trigger input)
Note 1:
14L
—
10
11
12
13
14
—
—
—
—
—
—
1
2
3
4
5
6
7
8
9
TSSOP
2:
PIN DESCRIPTIONS
20L
10
11
12
13
14
15
16
17
18
19
20
—
1
2
3
4
5
6
7
8
9
The pin’s “smart” pull-up shuts off while the pin is forced low. This is done to reduce the standby and
shut-down 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
A = Analog pins (Potentiometer terminals) I = digital input (high Z)
O = digital output
P = Power
pin.
QFN
20L
PINOUT DESCRIPTION FOR THE MCP443X/5X
19
20
10
12
13
14
15
16
17
18
21
11
3
4
5
6
7
8
9
1
2
Pin
Symbol
HVC/A0
RESET
P1W
P2W
P3W
SDA
P0W
P3A
P3B
SCL
P1B
P1A
P0A
P0B
P2B
P2A
V
V
NC
A1
EP
DD
SS
I/O = Input / Output
I/O
—
—
—
A
A
A
A
A
A
A
A
A
A
A
A
I
I
I
I
I
I
Table
HV w/ST
HV w/ST
HV w/ST
HV w/ST
HV w/ST
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Buffer
Type
3-1.
—
—
P
P
Pull-up/
(Note
“smart” High Voltage Command / I
“smart” I
Weak
down
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
—
—
—
—
1)
Potentiometer 3 Terminal A
Potentiometer 3 Wiper Terminal
Potentiometer 3 Terminal B
I
I
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
Positive Power Supply Input
Potentiometer 2 Terminal B
Potentiometer 2 Wiper Terminal
Potentiometer 2 Terminal A
Exposed Pad.
2
2
2
C Clock Input
C Serial Data I/O. Open Drain output
C Address 1
Standard Function
(Note
MCP443X/5X
2)
2
C Address 0
DS22267A-page 39