MCP4461-104E/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP4461 is a quad-channel 100k-ohm digital potentiometer with 8-bit resolution, non-volatile memory, and I2C interface in 20-pin TSSOP, retaining wiper positions through power cycles for gain and offset trimming.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP4461-104E/ST Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Quad independent 100k-ohm potentiometer channels with 8-bit (256-step) resolution for precise analog adjustment
- Non-volatile EEPROM memory retains all 4 wiper positions through power cycles without host re-initialization
- I2C 2-wire serial control interface at up to 400 kHz supporting multiple devices on a shared bus with address pins
- Supports both potentiometer (voltage divider) and rheostat (variable resistor) configurations on each channel
- 20-pin TSSOP package providing all 4 channels plus I2C pins in a compact 6.5 mm x 4.4 mm footprint
Applications
The MCP4461 is used in precision analog calibration circuits where four independent gain and offset trims must survive power loss, such as multi-channel sensor conditioning boards, audio equalizers, and industrial signal processing cards. Its I2C interface allows a microcontroller to adjust all 4 channels at 400 kHz while sharing the bus with other peripherals. Non-volatile wiper storage eliminates the need for host firmware re-calibration sequences on every power-up, simplifying system initialization.
Specifications
| Manufacturer Package Code | TSSOP-20 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Additional Feature | NON VOLATILE MEMORY |
| Bandwidth-Nom | 0.1kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 4 |
| Number of Positions | 257 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Resistance Law | LINEAR/LOGARITHMIC |
| 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 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many independent potentiometer channels does the MCP4461 provide, and what is the resistance range?
The MCP4461-104 provides 4 independent potentiometer channels, each with a 100k-ohm end-to-end resistance and 256 wiper positions (8-bit resolution). Each channel step represents approximately 391 ohms of resistance change, enabling fine-grained analog voltage division and gain adjustment across the full 100k-ohm range.
Does the MCP4461 retain wiper positions after power is removed?
Yes, the MCP4461 stores all 4 wiper positions in on-chip non-volatile EEPROM memory, retaining settings through unlimited power cycles with no battery backup required. On power-up, each potentiometer channel automatically restores its last programmed position, eliminating the need for host microcontroller re-initialization sequences in calibrated analog systems.
What I2C clock speed does the MCP4461 support, and how many devices can share one bus?
The MCP4461 operates on a standard I2C bus at up to 400 kHz (Fast mode), compatible with most microcontroller I2C peripherals. Multiple MCP4461 devices can share one I2C bus using 3 hardware address pins that set 8 unique 7-bit addresses, allowing up to 8 devices (32 total potentiometer channels) on a single 2-wire bus.
For a multi-channel analog signal conditioning board, how does the MCP4461 compare to using 4 discrete trim potentiometers?
The MCP4461 replaces 4 mechanical trim potentiometers with digitally adjustable channels that can be reprogrammed in-system without physical access, enabling remote calibration and field recalibration. Unlike mechanical pots, each of the 256 wiper positions is precisely repeatable and immune to vibration-induced drift, improving long-term stability in industrial sensor conditioning and measurement applications.
What package does the MCP4461-104E/ST use, and how does it fit in a TSSOP layout?
The MCP4461-104E/ST is packaged in a 20-pin TSSOP with 0.65 mm pin pitch and approximately 6.5 mm x 4.4 mm body, placing all 4 potentiometer channels in a footprint smaller than a single DIP-8 component. The E-suffix grade covers -40°C to +125°C for industrial designs, and the TSSOP footprint integrates cleanly into standard SMD PCB layouts alongside op-amp and instrumentation amplifier ICs.
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