MCP4142-103E/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
The MCP4142-103E/P is a single-channel 10 kΩ digital potentiometer from Microchip with 129 wiper positions, controlled via an SPI increment/decrement interface and housed in an 8-pin PDIP package. It provides non-volatile position storage so the wiper setting is retained through power cycles.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP4142-103E/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7620(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
- 129 linear wiper positions on a 10 kΩ end-to-end resistance for fine-grained analog adjustment
- SPI increment/decrement interface compatible with standard 3-wire microcontroller peripherals
- Non-volatile wiper position memory retains settings across power cycles without a separate EEPROM
- 8-pin PDIP package ideal for prototyping and through-hole production assemblies
- Wide supply voltage range from 1.8 V to 5.5 V for compatibility with 3.3 V and 5 V systems
Applications
The MCP4142-103E/P is used in calibration circuits for sensor signal conditioning, where software-controlled resistance trimming replaces mechanical trimmer potentiometers that drift over time. It suits audio volume control stages, programmable gain amplifier feedback networks, and LCD bias adjustment circuits that require repeatable, microcontroller-driven resistance settings. The non-volatile memory makes it especially practical in field-calibrated instruments where the last calibration offset must persist through power loss.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 9 |
| Bandwidth-Nom | 1kHz |
| Control Interface | INCREMENT/DECREMENT |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 129 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Resistance Law | LINEAR |
| Resistance Tolerance-Max | 20% |
| Resistor Terminal Voltage-Max | 5V |
| Supply Current-Max | 1mA |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Coefficient-Nom | 150ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Total Resistance-Nom | 10000Ω |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many wiper positions does the MCP4142-103E/P support, and what resolution does this provide over the 10 kΩ range?
The MCP4142-103E/P supports 129 wiper positions over the full 10 kΩ end-to-end resistance, yielding a step resolution of approximately 78 Ω per step. This level of resolution is sufficient for calibration offsets in sensor interfaces where trimming accuracy within 1 % of full-scale is required.
How does the SPI increment/decrement interface of the MCP4142-103E/P differ from a full address-based SPI digital potentiometer?
Unlike address-based SPI potentiometers that write the target position directly in a single transaction, the MCP4142-103E/P moves the wiper one step at a time per SPI command. This means reaching step 64 from step 0 requires 64 individual increment commands, but it simplifies the control firmware and reduces the risk of large resistance jumps that could disturb sensitive analog circuitry.
For a battery-powered calibration instrument, why does the MCP4142-103E/P non-volatile memory reduce system complexity?
Because the MCP4142-103E/P stores the wiper position in internal non-volatile memory, the host microcontroller does not need to write calibration data to an external EEPROM and re-load it at startup. This eliminates at least 2 ICs (external EEPROM plus its decoupling capacitors) and the associated firmware overhead, reducing BOM cost and startup latency by several milliseconds.
Which supply voltage range does the MCP4142-103E/P support, and how does this affect use in mixed 3.3 V / 5 V designs?
The MCP4142-103E/P operates from 1.8 V to 5.5 V, allowing it to connect directly to both 3.3 V microcontroller SPI buses and 5 V analog supply rails without level-shifting circuitry. In a mixed-voltage design where the MCU runs at 3.3 V and the analog section uses 5 V, the device accepts 3.3 V logic levels on its SPI pins while the potentiometer resistive element spans the 5 V rail.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1600 | $1.16 |
| 100+ | $0.8700 | $87.00 |
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| 5000+ | $0.8300 | $4150.00 |
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