MCP4661-104E/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP4661-104E/ST is a dual-channel 256-step digital potentiometer with 100 kΩ end-to-end resistance and non-volatile memory from Microchip in a 14-pin TSSOP package. Key specs: I2C increment/decrement control interface, NV memory retains wiper position across power cycles. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- MCP4661-104E/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0000(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
- Non-volatile memory stores wiper position across power cycles, eliminating initialization code and enabling plug-and-play operation in calibration and bias adjustment circuits
- 256-step resolution on 100 kΩ end-to-end resistance delivers fine-grained adjustment of approximately 391 Ω per step for precise analog tuning in amplifier and filter circuits
- Dual independent potentiometer channels in a compact 14-pin TSSOP package enable two-axis adjustment (e.g., gain and offset) from a single I2C-controlled device
Applications
The MCP4661-104E/ST is suited for programmable gain and offset calibration in precision analog signal chains where non-volatile retention of settings is required after power removal. Its dual-channel architecture enables simultaneous adjustment of two independent parameters such as amplifier gain and DC offset in sensor front-end circuits. It is also used in adaptive filter tuning, LCD contrast control, and motor speed adjustment in consumer electronics and industrial control systems.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-14 |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| Additional Feature | NON-VOLATILE MEMORY |
| Bandwidth-Nom | 0.1kHz |
| Control Interface | INCREMENT/DECREMENT |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e3 |
| Number of Functions | 2 |
| 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 | 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 | 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
What end-to-end resistance and step count does MCP4661-104E/ST provide, and what adjustment resolution does this yield?
The MCP4661-104E/ST offers a 100 kΩ end-to-end resistance with 256 steps, yielding approximately 391 Ω per step. This resolution is sufficient for precision bias trimming, gain calibration, and analog reference adjustment in amplifier and sensor circuits where fine-grained control over a large resistance range is needed without discrete resistor networks.
How does the non-volatile memory in MCP4661-104E/ST benefit calibration workflows in production environments?
The non-volatile EEPROM in MCP4661-104E/ST retains the wiper position across power cycles without requiring host firmware to re-load calibration values at startup. In production calibration workflows, the technician sets the wiper once via I2C, and the device powers up in the calibrated position on every subsequent boot, reducing firmware complexity and eliminating calibration drift caused by missed initialization steps.
What I2C control method does MCP4661-104E/ST use, and how does increment/decrement compare to absolute wiper addressing?
The MCP4661-104E/ST supports both direct wiper register write (absolute positioning to any of 256 steps) and increment/decrement commands, which move the wiper one step at a time from its current position. Increment/decrement is useful for closed-loop control loops that adjust resistance in response to a sensor reading, while absolute addressing is preferred during one-time calibration where a specific 8-bit resistance code is written directly.
Can MCP4661-104E/ST replace a mechanical trimmer potentiometer in an amplifier gain-set circuit, and what are the tradeoffs?
Yes, MCP4661-104E/ST can replace a mechanical 100 kΩ trimmer in gain-set applications, offering the advantage of software-controlled adjustment, non-volatile retention, and no mechanical wear over millions of adjustment cycles. The tradeoff is that the digital potentiometer has a wiper resistance of approximately 75 Ω to 100 Ω in series, and its 100 Hz bandwidth limits use in high-frequency signal paths, so it is best suited for DC or low-frequency bias and calibration applications.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.6800 | $1.68 |
| 100+ | $1.1600 | $116.00 |
| 1000+ | $1.1200 | $1120.00 |
| 5000+ | $1.1100 | $5550.00 |
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| 7584+ | $1.0000 | $7584.00 |
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