Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | 7-bit volatile digital rheostat |
| Wiper positions | 128 |
| Interface | I²C-compatible |
| Supply operation | 1.8 V to 5.5 V |
| Power-on setting | Mid-scale |
| Package | 6-lead SC70 |
| Temperature grade | Extended, -40°C to +125°C |
| Product status | In Production family |
Product Overview
The MCP4017T-103E/LT is the 10 kΩ extended-temperature version of Microchip’s MCP4017 7-bit volatile digital rheostat in a six-lead SC70 package. It provides 128 programmable resistance positions through an I²C-compatible interface for calibration, gain setting and electronically controlled resistance functions.
The MCP4017 is a rheostat configuration rather than a three-terminal potentiometer: the available resistor path is between terminal B and the wiper. That distinction matters when replacing another digital potentiometer family, because the topology cannot provide an independently accessible A-W-B voltage divider.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Resolution | 7 bit / 128 taps |
| Nominal resistance | 10 kΩ |
| Resistance range specification | 8 kΩ to 12 kΩ for -103 device |
| Typical wiper resistance | 100 Ω |
| Operating voltage | 1.8 V to 5.5 V |
| I²C standard mode | Up to 100 kHz, Cb ≤ 400 pF |
| I²C fast mode | Up to 400 kHz at 2.7 V to 5.5 V, Cb ≤ 400 pF |
| Typical static current | 2.5 µA with serial interface inactive |
| Typical absolute tempco | 50 ppm/°C from 0°C to +70°C |
| Typical ratiometric tempco | 10–15 ppm/°C near mid-scale depending datasheet revision |
| Operating temperature | -40°C to +125°C |
| Package | SC70-6 |
Design Considerations
The wiper is volatile and returns to mid-scale after power-on or brownout reset. Firmware should therefore explicitly write the operating value during startup whenever the application depends on a calibrated resistance.
The -103 code defines a nominal 10 kΩ element with a fairly broad end-to-end resistance tolerance. Ratiometric uses are less sensitive to absolute resistance, while rheostat uses should include the end-to-end tolerance and wiper resistance in the error budget.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
Within the MCP4017 I²C digital-rheostat family, the MCP4017T-503E/LT specifies 50 kΩ rather than this device’s 10 kΩ nominal resistance. Select by analog circuit impedance and the exact resistance order code, not family name alone. Explore the digital potentiometer category for other topologies.
