MCP4161T-103E/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP4161T-103E/SN is a single-channel 8-bit non-volatile digital potentiometer with SPI interface and 10 kΩ end-to-end resistance in an SOIC-8 package. It retains wiper position through power cycles using on-chip EEPROM storage. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP4161T-103E/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7570(MOQ 25)
- 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 8-bit resolution with 10 kΩ (103) end-to-end resistance and non-volatile EEPROM wiper storage, retaining position across power cycles
- SPI increment/decrement control interface compatible with 3.3 V and 5 V microcontrollers for simple software-driven resistance adjustment
- Compact SOIC-8 package with Pb-free JESD-609 e3 compliance and 1 kHz –3 dB bandwidth suitable for audio and control applications
Applications
The MCP4161T-103E/SN is used in audio volume control, LCD bias voltage adjustment, sensor calibration, and programmable gain amplifier circuits where the resistance setting must survive power interruptions without reconfiguration. Its SPI interface integrates easily with microcontrollers in IoT sensor nodes, industrial calibration equipment, and portable instruments that require digitally controlled resistance with persistent settings.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Bandwidth-Nom | 1kHz |
| Control Interface | INCREMENT/DECREMENT |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 129 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| 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 | YES |
| Technology | CMOS |
| Temperature Coefficient-Nom | 150ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Total Resistance-Nom | 10000Ω |
| 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 | Mainland China, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP4161T-103E/SN:
Microchip Technology Inc SINGLE 8-BIT, NON-VOLATILE LINEAR POT W/SPI
Frequently Asked Questions
How does the non-volatile wiper storage in MCP4161T-103E/SN benefit designs that lose power frequently?
The MCP4161T-103E/SN stores the wiper position in on-chip EEPROM, which retains data for at least 100,000 write cycles and more than 40 years of data retention. When power is restored, the wiper automatically returns to its last programmed position — no SPI initialization sequence is required. This is critical in audio presets, display brightness controls, and sensor trim circuits where re-calibration after every power cycle would be impractical.
For an 8-bit digital potentiometer with 10 kΩ total resistance, what step resolution does MCP4161T-103E/SN provide?
With 8-bit resolution, the MCP4161T-103E/SN provides 256 wiper positions across its 10 kΩ end-to-end resistance. Each step represents approximately 39 Ω of resistance change. For a gain-control amplifier with a 10 kΩ feedback network, this yields roughly 0.03 dB per step near unity gain — sufficient resolution for most audio and instrumentation calibration tasks.
Which control topologies are compatible with the MCP4161T-103E/SN SPI interface?
The MCP4161T-103E/SN supports SPI modes 0,0 and 1,1 (CPOL/CPHA), operating at clock rates up to 10 MHz on a 5 V supply. Its 4-wire SPI bus (CS, SCK, SDI, SDO) is directly compatible with most 8-bit, 16-bit, and 32-bit microcontrollers including PIC, AVR, ARM Cortex-M, and ESP32 families. The increment/decrement command set requires only 16-bit transfers per wiper update.
When is MCP4161T-103E/SN preferred over a mechanical trimmer potentiometer in production calibration?
In automated production calibration where each board must be trimmed to a target value under software control, the MCP4161T-103E/SN eliminates manual adjustment tools and operator variability. The digital interface allows a test fixture to sweep the full 256-step range, measure the circuit output at each step, and lock the optimal wiper position in non-volatile memory in under 1 second — reducing calibration labor cost and improving unit-to-unit consistency compared to a mechanical trimmer with 20-turn adjustment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $1.0600 | $26.50 |
| 100+ | $0.9700 | $97.00 |
| 1000+ | $0.9400 | $940.00 |
| 9900+ | $0.7610 | $7533.90 |
| 13200+ | $0.7600 | $10032.00 |
| 16500+ | $0.7570 | $12490.50 |
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