MCP4551-103E/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP4551-103E/MS is a single-channel 10 kΩ I2C digital potentiometer with 8-bit (256-step) resolution and a 2 kHz bandwidth, housed in an 8-pin MSOP package. It provides volatile wiper position control via a 2-wire I2C interface for programmable gain, volume, and calibration applications. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP4551-103E/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7500(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 256 steps (approximately 39 Ω per step), delivering 8-bit resistance resolution over a 2-wire I2C bus
- I2C control interface with configurable device address, enabling up to 8 MCP4551 devices on a single bus for multi-channel programmable resistance networks
- 8-pin MSOP package with 2 kHz bandwidth, ideal for audio signal processing, sensor calibration trimmers, and programmable gain amplifier designs in compact PCBs
Applications
The MCP4551-103E/MS is used in I2C-controlled programmable gain amplifiers, digital volume controls, and sensor calibration circuits where software-adjustable resistance from 0 Ω to 10 kΩ in 256 steps is needed without mechanical potentiometers. Its I2C interface integrates directly into systems already using I2C for sensors and EEPROMs, reducing bus complexity and firmware overhead. Medical diagnostic equipment, industrial process controllers, and audio DSP boards use this device for runtime resistance adjustment with microcontroller commands.
Specifications
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Additional Feature | THE RESISTOR ARRAY VALUES ARE 5000 OHM,10000 OHM, 50000 OHM |
| Bandwidth-Nom | 2kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 257 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE |
| 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 | 0.6mA |
| Supply Voltage-Nom | 3V |
| 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 | 100000Ω |
| Package | Small Outline Packages |
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 MCP4551-103E/MS:
Digital Potentiometer, 1 Func, 100000ohm, 2-wire Serial Control Interface, 257 Positions, CMOS, PDSO8
Digital Potentiometer, 1 Func, 100000ohm, 2-wire Serial Control Interface, 257 Positions, CMOS, PDSO8
Digital Potentiometer, 1 Func, 100000ohm, 2-wire Serial Control Interface, 257 Positions, CMOS, PDSO8
Frequently Asked Questions
How many resistance steps does MCP4551-103E/MS provide over its 10 kΩ range, and what step resolution does this yield?
The MCP4551-103E/MS provides 256 wiper positions (8-bit resolution) across its 10 kΩ end-to-end resistance, resulting in a step size of approximately 39 Ω per increment. This resolution is sufficient for audio volume controls with smooth dB-scale adjustment, calibration trimmers replacing mechanical presets, and programmable gain amplifier feedback networks requiring fine resistance tuning.
How does the I2C interface of MCP4551-103E/MS simplify integration into multi-sensor systems compared to SPI-based digital potentiometers?
The MCP4551-103E/MS uses a 2-wire I2C bus (SDA and SCL) with a configurable 3-bit device address, allowing up to 8 devices on the same bus alongside other I2C sensors and EEPROMs. Compared to SPI-based potentiometers that each require a dedicated chip select line, I2C reduces the total pin count on the host MCU and simplifies PCB routing in systems with 4 to 8 independent programmable resistance channels.
Is the MCP4551-103E/MS wiper position volatile or non-volatile, and what design consideration does this create for system startup?
The MCP4551-103E/MS stores wiper position in volatile RAM only — the position resets to mid-scale (128 steps, approximately 5 kΩ) on power-up. Designs that require a specific startup resistance must issue an I2C write command during initialization firmware. For applications needing persistent resistance settings across power cycles, the MCP4561 variant adds non-volatile EEPROM storage, trading a slightly longer write time (approximately 1 ms for EEPROM commit) against the initialization overhead.
For a compact industrial sensor calibration PCB, how does the MSOP-8 package of MCP4551-103E/MS help reduce board space compared to a mechanical trimmer?
The 8-pin MSOP package of the MCP4551-103E/MS measures approximately 3 mm x 3 mm, which is smaller than most 3296-style mechanical trimmer potentiometers (typically 9.5 mm x 4.5 mm) and requires no manual adjustment tooling during production. Software calibration via I2C also allows post-assembly trimming without physical access to the PCB, reducing test fixture cost and enabling field recalibration in sealed industrial enclosures.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9900 | $0.99 |
| 5+ | $0.9400 | $4.70 |
| 10+ | $0.9000 | $9.00 |
| 50+ | $0.8900 | $44.50 |
| 100+ | $0.7800 | $78.00 |
| 1000+ | $0.7500 | $750.00 |
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