MCP40D18T-103E/LT Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock
MCP40D18T-103E/LT is a 7-bit I2C digital potentiometer from Microchip with a 10 kΩ end-to-end resistance and 128 wiper positions. It supports a 2-wire I2C serial interface for microcontroller-programmable resistance adjustment and is packaged in a compact 6-pin SOT-23 for space-constrained applications.
- Manufacturer
- Microchip
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- MCP40D18T-103E/LT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5070(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 7-bit resolution with 128 programmable wiper positions for fine resistance adjustment
- 10 kΩ end-to-end resistance with I2C 2-wire serial control interface
- Compact 6-pin SOT-23 package minimizing PCB real estate
- Single potentiometer function with 1 kHz nominal bandwidth
- Non-volatile wiper memory retaining position through power cycles
- Low wiper current enabling use in precision voltage divider circuits
Applications
The MCP40D18T-103E/LT is ideal for digitally adjustable gain stages in audio amplifiers, programmable reference voltage dividers in sensor calibration circuits, and software-controlled bias setting in analog front ends. Its I2C interface allows microcontrollers to update the resistance setting dynamically without mechanical intervention, making it suitable for remote calibration in IoT sensor nodes and industrial field instruments. Medical devices, LCD contrast control, and programmable filter circuits also leverage its fine 128-step resolution.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 7Weeks |
| YTEOL | 0 |
| Bandwidth-Nom | 1kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 128 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Resistance Law | LINEAR |
| Resistance Tolerance-Max | 20% |
| Resistor Terminal Voltage-Max | 5.5V |
| Screening Level | TS 16949 |
| Supply Current-Max | 0.08mA |
| Supply Voltage-Nom | 2.7V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Coefficient-Nom | 150ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Total Resistance-Nom | 10000Ω |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP40D18T-103E/LT:
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
How many resistance steps does the MCP40D18T-103E/LT offer, and what resolution does each step represent?
The MCP40D18T-103E/LT provides 128 wiper positions over a 10 kΩ end-to-end resistance, giving each step approximately 78 Ω of resolution. This 7-bit granularity is sufficient for gain trimming, voltage reference adjustment, and analog bias control in precision analog circuits.
Which communication interface does the MCP40D18T-103E/LT use, and how does it connect to a microcontroller?
The MCP40D18T-103E/LT uses a 2-wire I2C serial interface with standard SDA and SCL signals, requiring only 2 signal lines plus power and ground to a microcontroller. This makes it straightforward to integrate into I2C bus systems alongside sensors, EEPROMs, and DACs without requiring dedicated SPI chip-select pins.
In what scenarios would the MCP40D18T-103E/LT in a 6-pin SOT-23 package be preferred over a through-hole potentiometer?
The MCP40D18T-103E/LT's 6-pin SOT-23 package is preferred when the design requires automated factory calibration, remote software adjustment during field operation, or when the application must survive vibration environments where mechanical potentiometers would drift or wear out after fewer than 10,000 adjustment cycles.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5790 | $0.58 |
| 9000+ | $0.5120 | $4608.00 |
| 12000+ | $0.5090 | $6108.00 |
| 15000+ | $0.5070 | $7605.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”