MCP40D19T-103E/LT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
The MCP40D19T-103E/LT is a single-channel 7-bit digital potentiometer from Microchip with a 10 kΩ end-to-end resistance, controlled via I2C (2-wire serial) interface. It is housed in a tiny SC70-5 (SOT23) package with 128 wiper positions for precise resistance adjustment. Ideal for gain control, offset trimming, and calibration circuits in space-constrained embedded designs.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP40D19T-103E/LT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1211(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
- Single-channel 10 kΩ digital potentiometer with 7-bit (128-step) resolution
- I2C (2-wire serial) control interface for simple microcontroller integration
- Ultra-compact SC70-5 (SOT23) 5-pin package
- 1 kHz nominal bandwidth for audio and signal conditioning applications
- Non-volatile wiper position storage for power-cycle retention
- RoHS-compliant, lead-free (e3) construction
Applications
The MCP40D19T-103E/LT is used in analog signal conditioning circuits where electronically adjustable resistance is needed, such as automatic gain control (AGC) amplifiers, sensor calibration modules, and LCD display brightness control. Its I2C interface allows microcontrollers to set any of 128 wiper positions to fine-tune resistance between 0 Ω and 10 kΩ without mechanical trimming. The tiny SC70-5 footprint makes it especially attractive for wearable devices and compact IoT sensor nodes where PCB area is at a premium.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SC70-5 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Bandwidth-Nom | 1kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 128 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP5/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| 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 |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Total Resistance-Nom | 10000Ω |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP40D19T-103E/LT:
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Frequently Asked Questions
How many resistance steps does the MCP40D19T-103E/LT provide and what is its end-to-end resistance?
The MCP40D19T-103E/LT offers 128 wiper positions (7-bit resolution) across an end-to-end resistance of 10 kΩ, yielding a step size of approximately 78 Ω per LSB. This resolution is sufficient for most gain-control and calibration applications where fine analog adjustment is needed without mechanical trimmer replacement.
Which communication protocol does the MCP40D19T-103E/LT use and what bus speeds are supported?
The MCP40D19T-103E/LT uses the I2C (2-wire serial) interface for wiper position control, compatible with standard 100 kHz and fast-mode 400 kHz I2C bus speeds. This makes it easy to integrate with virtually any microcontroller that supports I2C, using only 2 signal lines (SDA and SCL) plus power and ground connections.
For a compact sensor calibration design, what PCB footprint does the MCP40D19T-103E/LT occupy?
The MCP40D19T-103E/LT comes in an SC70-5 package, which is one of the smallest 5-pin surface-mount packages available, measuring approximately 2.0 mm × 1.25 mm. This tiny footprint allows the digital potentiometer to be placed very close to the signal path on densely packed PCBs, minimizing parasitic resistance and routing length in precision calibration circuits.
When should an engineer choose MCP40D19T-103E/LT over a mechanical trimmer potentiometer?
The MCP40D19T-103E/LT is preferable to a mechanical trimmer when the application requires remote or automated calibration, such as factory-end-of-line trimming via I2C without physical access to the PCB. Its non-volatile memory can retain the 7-bit wiper setting through power cycles, eliminating the need for re-calibration on restart, which is a significant advantage in sealed industrial or automotive sensor assemblies.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1252 | $0.13 |
| 10+ | $0.1232 | $1.23 |
| 25+ | $0.1211 | $3.03 |
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