MCP4631-503E/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP4631-503E/ST is a single-channel digital potentiometer with 128 resistive steps and selectable end-to-end resistance values of 5 kOhm, 10 kOhm, or 50 kOhm, controlled via a 2-wire I2C serial interface in a 14-pin TSSOP package. It delivers 2 kHz nominal bandwidth for audio and low-frequency analog adjustment applications. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- MCP4631-503E/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7980(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 128-step digital potentiometer with three resistor array options (5 kOhm, 10 kOhm, 50 kOhm) selectable per order variant for design flexibility
- 2-wire I2C serial interface reducing GPIO usage to 2 pins and enabling multi-device addressing on a shared bus without chip-select lines
- 2 kHz nominal bandwidth supporting audio volume control and low-frequency active filter adjustment in consumer and industrial signal chains
- Compact 14-pin TSSOP package with JESD-609 e3 Pb-free construction for RoHS-compliant portable and industrial designs
Applications
The MCP4631-503E/ST suits I2C-bus systems requiring single-axis resistance trimming such as audio volume controls in portable speakers, gain-setting in microphone preamplifiers, and offset-correction circuits in precision sensor interfaces. Its 2-wire interface minimizes the pin count overhead on microcontrollers managing multiple I2C devices like temperature sensors, EEPROMs, and RTC modules on the same bus. Consumer electronics, handheld medical instruments, and industrial calibration equipment use the 50 kOhm variant for feedback-network adjustment where 128 discrete resistance steps provide sufficient resolution for production trimming.
Specifications
| Manufacturer Package Code | TSSOP-14 |
| Factory Lead Time | 7Weeks |
| 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 | R-PDSO-G14 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 257 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP14,.25 |
| 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 | 0.6mA |
| 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 |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Total Resistance-Nom | 100000Ω |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does MCP4631-503E/ST's I2C interface simplify multi-device bus management compared to an SPI digital potentiometer?
The MCP4631-503E/ST's 2-wire I2C interface requires only SDA and SCL lines shared across all devices on the bus, versus SPI's requirement for a dedicated chip-select line per device. In a design with 8 trim potentiometers, the I2C approach uses 2 GPIO lines total while SPI would require 2 + 8 = 10 GPIO lines, freeing 8 pins on a microcontroller for other peripherals. Multiple MCP4631 devices at different I2C addresses can coexist on the same 400 kHz fast-mode bus alongside temperature sensors, display drivers, and EEPROM devices.
For an audio volume control application, how does MCP4631-503E/ST's 128-step resolution and 2 kHz bandwidth translate to perceptual quality?
With 128 steps across 50 kOhm, each wiper increment changes resistance by approximately 394 Ohm, producing roughly 0.1 dB gain steps when used in a logarithmic voltage divider—below the 0.5 dB just-noticeable difference threshold for human hearing. The 2 kHz nominal bandwidth ensures the 50 kOhm wiper resistance does not attenuate audio signals below 2 kHz, covering the critical 20 Hz to 1 kHz fundamental frequency range of most music instruments and voice content without measurable insertion loss.
When should a designer choose MCP4631-503E/ST over MCP4362-503E/ST for a single-channel trim application?
MCP4631-503E/ST is the better choice for designs needing only 1 resistance channel with I2C bus connectivity and 128-step resolution, since the single-channel device costs less per unit than the quad-channel MCP4362-503E/ST and uses the simpler 2-wire I2C protocol rather than 3-wire SPI. The MCP4362 is preferable when 4 independent 256-step channels are needed simultaneously, such as multi-axis sensor calibration rigs, while MCP4631 suits single gain-trim or single offset-adjust tasks in portable instruments where minimizing BOM cost and I2C bus wiring matters more than channel count.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.2000 | $1.20 |
| 2+ | $0.8842 | $1.77 |
| 1000+ | $0.8700 | $870.00 |
| 5000+ | $0.8500 | $4250.00 |
| 5088+ | $0.8000 | $4070.40 |
| 7584+ | $0.7980 | $6052.03 |
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