MCP454X/456X/464X/466X
7/8-Bit Single/Dual I
2
C Digital POT with
Non-Volatile Memory
Features
• Single or Dual Resistor Network options
• Potentiometer or Rheostat configuration options
• Resistor Network Resolution
- 7-bit: 128 Resistors (129 Steps)
- 8-bit: 256 Resistors (257 Steps)
• R
AB
Resistances options of:
- 5 kΩ
- 10 kΩ
- 50 kΩ
- 100 kΩ
• Zero-Scale to Full-Scale Wiper operation
• Low Wiper Resistance: 75Ω (typ.)
• Low Tempco:
- Absolute (Rheostat): 50 ppm typical
(0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
• Non-volatile Memory
- Automatic Recall of Saved Wiper Setting
- WiperLock™ Technology
- 10 General Purpose Memory Locations
• I
2
C Serial interface
- 100 kHz, 400 kHz and 3.4 MHz support
• Serial protocol allows:
- High-Speed Read/Write to wiper
- Read/Write to EEPROM
- Write Protect to be enabled/disabled
- WiperLock to be enabled/disabled
• Resistor Network Terminal Disconnect Feature
via the Terminal Control (TCON) Register
• Write Protect Feature:
- Hardware Write Protect (WP) Control pin
- Software Write Protect (WP) Configuration bit
• Brown-out reset protection (1.5V typical)
• Serial Interface Inactive current (2.5 uA typ.)
• High-Voltage Tolerant Digital Inputs: Up to 12.5V
• Wide Operating Voltage:
- 2.7V to 5.5V - Device Characteristics Specified
- 1.8V to 5.5V - Device Operation
• Wide Bandwidth (-3dB) Operation:
- 2 MHz (typ.) for 5.0 kΩ device
• Extended temperature range (-40°C to +125°C)
Description
The MCP45XX and MCP46XX devices offer a wide
range of product offerings using an I
2
C interface. This
family of devices support 7-bit and 8-bit resistor
networks, Non-Volatile memory configurations, and
Potentiometer and Rheostat pinouts.
WiperLock Technology allows application-specific
calibration settings to be secured in the EEPROM.
Package Types (top view)
MCP45X1
Single Potentiometer
HVC / A0
SCL
SDA
V
SS
1
2
3
4
8
7
6
5
V
DD
P0B
P0W
P0A
MCP45X2
Single Rheostat
HVC / A0
SCL
SDA
V
SS
1
2
3
4
8
7
6
5
V
DD
A1
P0B
P0W
MSOP
HVC / A0 1
SCL 2
SDA 3
V
SS
4
EP
9
8 V
DD
7 A1
6 P0B
5 P0W
HVC / A0 1
SCL 2
SDA 3
V
SS
4
MSOP
8 V
DD
EP
9
7 A1
6 P0B
5 P0W
DFN 3x3 (MF) *
DFN 3x3 (MF) *
MCP46X1
Dual Potentiometers
HVC/A0
SCL
SDA
V
SS
P1B
P1W
P1A
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
DD
A1
A2
WP
P0B
P0W
P0A
HVC/A0
V
DD
A1
A2
16 15 14 13
SCL
SDA
V
SS
V
SS
1
2
3
4
EP
17
5 6 7 8
P1B
P1W
P1A
P0A
12 WP
11 NC
10 P0B
9 P0W
TSSOP
QFN-16 4x4 (ML) *
MCP46X2
Dual Rheostat
HVC/A0
SCL
SDA
V
SS
P1B
1
2
3
4
5
10 V
DD
HVC / A0 1
9 A1
SCL 2
8 P0B
SDA 3
7 P0W
V
SS
4
6 P1W
P1B 5
10 V
DD
EP
11
9 A1
8 P0B
7 P0W
6 P1W
MSOP
DFN 3x3 (MF) *
* Includes Exposed Thermal Pad (EP); see
©
2008 Microchip Technology Inc.
DS22107A-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
