Rheostat, 7 bit, 4-channel, 128 step, I2C, 100 kOhm, TSSOP-14

7-Bit Quad I2C Digital POT with Nonvolatile Memory
MCP444X

Description
The MCP444X devices are non-volatile, 7-bit (129 wiper steps) digital potentiometers with EEPROM and an I2C compatible interface. The MCP444X family is available with end-to-end resistor values of 5KO, 10KO, 50kO and 100KO. These devices offer WiperLock™ Technology which allows the user unlimited reprogramming and locking of the wiper setting. It is useful for equipment that requires factory trimming or recalibration. The MCP444X devices offer a variety of configurations simplifying design while minimizing cost, package size and pin count.

Features
- Quad Resistor Network
- Potentiometer or Rheostat configuration options
- Resistor Network Resolution - 7-bit: 128 Resistors (129 Taps)
- RAB Resistances options of: - 5kO, - 10kO, - 50kO, - 100kO
- Zero Scale to Full Scale Wiper operation
- Low Wiper Resistance: 75 O (typical)
- Low Tempco:
- Absolute (Rheostat): 50 ppm typical (0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
- Nonvolatile Memory
- Automatic Recall of Saved Wiper Setting
- WiperLock™ Technology
- 5 General Purpose Memory Locations
- I2C 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/disable
- WiperLock to be enabled/disabled
- Resistor Network Terminal Disconnect Feature via Terminal Control (TCON) Register
- Reset input pin
- 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 typical)
- High-Voltage Tolerant Digital Inputs: Up to 12.5V
- Supports Split Rail Applications
- Internal weak pull-up on all digital inputs (except SCL and SDA)
- Wide Operating Voltage:
- 2.7V to 5.5V - Device Characteristics Specified
- 1.8V to 5.5V - Device Operation
- Wide Bandwidth (-3 dB) Operation: - 2 MHz (typical) for 5.0 kO device
- Extended temperature range (-40°C to +125°C)
- Package Types: 4x4 QFN-20, TSSOP-20 and TSSOP-14