MCP4341-502E/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP4341-502E/ST is a quad-channel 7-bit digital potentiometer from Microchip with a 5 kohm end-to-end resistance and 128 wiper positions per pot. It communicates over a 3-wire SPI interface and stores wiper settings in on-chip EEPROM for power-loss retention, available in a 20-pin TSSOP package for compact PCB designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP4341-502E/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2400(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
- Quad independent 5 kohm digital potentiometers in a single 20-pin TSSOP package, replacing four discrete mechanical trimmers
- 128 wiper steps (7-bit resolution) providing approximately 39 ohm per step for fine gain and offset adjustment
- Non-volatile EEPROM wiper position storage retaining last-set resistance values across power cycles without host firmware intervention
- 3-wire SPI interface with daisy-chain support enabling control of multiple MCP4341 devices from a single microcontroller SPI bus
Applications
The MCP4341-502E/ST is used in programmable gain amplifier stages, calibration offset trimmers, and LCD contrast adjustment circuits where mechanical potentiometers are impractical. Industrial process control systems use it to digitally adjust sensor signal conditioning networks via SPI, storing calibration values in its EEPROM so settings persist after power cycling. Audio equipment, instrumentation, and automated test equipment also leverage its four independent wiper channels to replace multiple manual adjustment points with software-controlled tuning.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-20 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Bandwidth-Nom | 2kHz |
| Control Interface | 3-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 4 |
| Number of Positions | 129 |
| 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 |
| 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 | 5000Ω |
| 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 many discrete resistance steps does the MCP4341-502E/ST provide across its 5 kohm range?
The MCP4341-502E/ST offers 128 wiper positions across a 5 kohm end-to-end resistance, yielding a step size of approximately 39 ohm per LSB. This resolution is sufficient for fine gain trimming in instrumentation amplifier circuits and offset nulling in data acquisition front-ends where a 0.8% adjustment step meets the required calibration granularity.
How does the on-chip EEPROM benefit a design that loses power unexpectedly?
The MCP4341 EEPROM retains the wiper position programmed by the host and automatically restores it at power-up without any SPI transaction, meaning calibration offsets and gain settings survive brownouts and unplanned shutdowns. This removes the need for a dedicated NVM in the system and eliminates the firmware initialization sequence that would otherwise be required to re-load potentiometer settings from an external Flash device.
What SPI clock rate does the MCP4341-502E/ST support and how quickly can all 4 wipers be updated?
The MCP4341-502E/ST SPI interface operates at clock rates up to 10 MHz. A single 16-bit write command updates one wiper in 1.6 µs at 10 MHz; updating all 4 channels with daisy-chain transfers requires four sequential 16-bit frames, completing the full quad update in approximately 6.4 µs. This is fast enough for real-time gain scheduling in audio processing and control loops running at multi-kilohertz sample rates.
How does replacing four discrete 5 kohm trimmers with a single MCP4341-502E/ST affect PCB space?
Four standard 3-mm square SMT trimmers occupy approximately 36 mm2 of board area plus routing clearances. The MCP4341-502E/ST in a 20-pin TSSOP measures 6.5 mm x 4.4 mm (about 28.6 mm2), and its SPI interface reduces dedicated adjustment access pads to just 4 shared signals. The net board space saving is typically 20% to 40% depending on trimmer placement, while also eliminating mechanical drift and the need for periodic re-trimming.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.8500 | $1.85 |
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| 100+ | $1.4000 | $140.00 |
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