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Microchip Technology MCP4441T-502E/ST
- Part No.:
- MCP4441T-502E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP4441T-502E/ST.pdf
- Description:
- IC DGTL POT 5KOHM 129TAP 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,871
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Product details
Overview
MCP4441T-502E/ST from Microchip Technology is a quad-channel, 7-bit nonvolatile digital potentiometer with 5 kΩ end-to-end resistance, I²C interface, WiperLock™ technology, and EEPROM wiper storage. It operates from 2.7V to 5.5V, supports up to 3.4 MHz I²C, and delivers 129-tap resolution per channel for precision analog control in programmable gain amplifiers and sensor calibration circuits.
For engineers reviewing the MCP4441T-502E/ST datasheet, MCP4441T-502E/ST pinout, MCP4441T-502E/ST application, or MCP4441T-502E/ST equivalent, key selection criteria include its 5 kΩ RAB value, 7-bit resolution, nonvolatile wiper recall, TSSOP-20 package, and support for split-rail operation with high-voltage tolerant inputs up to 12.5V.
Technical Context
The MCP4441T-502E/ST integrates four independent resistor networks, each configurable as potentiometer or rheostat via terminal disconnect control (TCON registers). Its I²C interface supports Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes with hardware/software write protection and reset input for deterministic initialization.
Nonvolatile memory stores wiper positions across power cycles, with automatic recall at power-up and five general-purpose EEPROM locations. The device features brown-out reset (1.5V typical), low 75 Ω typical wiper resistance, and ratiometric tempco of 15 ppm/°C for stable voltage-divider performance over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RAB Resistance | 5 kΩ ±20% - defines full-scale analog range for gain/offset tuning |
| Resolution | 7-bit (129 taps) - enables 0.78% step granularity for fine analog adjustment |
| Wiper Resistance | 75 Ω typical - minimizes signal path error in low-impedance feedback loops |
| Tempco (Ratiometric) | 15 ppm/°C typical - ensures stable voltage division across temperature in sensor interfaces |
| I²C Speed Support | Up to 3.4 MHz - allows rapid wiper updates in real-time closed-loop systems |
| Operating Voltage | 2.7V to 5.5V - compatible with standard logic rails and mixed-signal supply domains |
| Temperature Range | –40°C to +125°C - qualified for automotive under-hood and industrial motor control environments |
Pinout & Package
TSSOP-20 package with 0.65 mm pitch; 20-pin surface-mount outline optimized for space-constrained PCB layouts and thermal performance up to 1110 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | 2.7–5.5V analog/digital core supply; powers internal logic and resistor networks |
| VSS | Ground Reference | Common return for analog and digital sections; must be low-impedance |
| SCL | I²C Clock Input | Drives synchronous serial communication; Schmitt-triggered for noise immunity |
| SDA | I²C Data I/O | Open-drain bidirectional bus line; supports multi-master arbitration |
| WP | Hardware Write Protect | Active-low pin disabling EEPROM and wiper writes when asserted |
| RESET | Asynchronous Reset | Forces all wipers to nonvolatile stored values and clears volatile registers |
| HVC/A0 | High-Voltage Control / Address LSB | Enables WiperLock™ at ≥9.0V; also sets I²C slave address bit A0 |
| A1 | I²C Slave Address MSB | Configures one of four possible I²C addresses (0x2C–0x2F) with A0 |
| P0A–P3B | Resistor Network Terminals | Four independent A/W/B terminals per channel; support potentiometer or rheostat wiring |
| P0W–P3W | Wiper Outputs | Low-resistance sliding contacts; connect to op-amp inputs or feedback nodes |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile Wiper Storage | EEPROM retains last wiper position across power cycles-enables "last-known-state" recovery without host reinitialization |
| WiperLock™ Technology | Hardware-enabled write lock prevents accidental wiper changes during system operation using HVC/A0 pin voltage detection |
| Terminal Disconnect Control | TCON registers allow software-controlled disconnection of any resistor terminal-eliminates leakage paths in standby or fault conditions |
| High-Voltage Tolerant Inputs | Digital pins withstand up to 12.5V-supports direct interfacing with 5V/12V control signals without level shifters |
| Split-Rail Operation Support | Independent VDD/VSS reference enables use in dual-supply analog circuits where ground is not common to digital domain |
Applications
| Programmable Gain Amplifier | Sensor Offset Calibration |
|---|---|
Use Scenario: Adjusting feedback network resistance in instrumentation amplifiers to select discrete gain settings (e.g., 1×, 10×, 100×). IC Role / Device Role / Timing Role: Quad digital potentiometer providing four independent, nonvolatile gain-setting elements per amplifier stage. Use Value: Eliminates manual trimmer replacement; enables factory-programmed or field-updatable gain without hardware change. | Use Scenario: Compensating for zero-point drift in pressure, temperature, or current sensors before ADC digitization. IC Role / Device Role / Timing Role: Precision voltage divider injecting calibrated offset into sensor signal path prior to amplification. Use Value: Achieves <±1 mV offset accuracy over temperature using 15 ppm/°C ratiometric tempco and 75 Ω wiper resistance. |
| LED Brightness Control | Power Supply Feedback Tuning |
Use Scenario: Dynamically adjusting current-limiting resistance in constant-current LED driver feedback loops for dimming profiles. IC Role / Device Role / Timing Role: Rheostat-mode configuration of PxA–PxW terminals to set LED current threshold in DC-DC converter feedback. Use Value: Enables smooth 129-step brightness control with nonvolatile memory retaining last dim level after power loss. | Use Scenario: Fine-tuning output voltage of adjustable DC-DC converters (e.g., buck regulators) via feedback resistor divider. IC Role / Device Role / Timing Role: Potentiometer-mode configuration replacing fixed resistors in VOUT sensing network to enable programmable regulation. Use Value: Supports remote voltage trimming and adaptive load compensation with 5 kΩ RAB matching typical feedback impedance ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4461T-502E/ST | 8-bit resolution (257 taps), same 5 kΩ RAB and nonvolatile architecture | Higher resolution required for sub-0.4% step granularity in precision DAC-like functions | Select when finer analog step control is needed; shares identical pinout and I²C protocol |
| MCP4442T-502E/ST | Rheostat-only configuration (no potentiometer mode); same 7-bit, 5 kΩ, nonvolatile spec | Applications requiring only two-terminal variable resistance (e.g., current limiting) without A–W–B three-terminal use | Choose when circuit topology uses only two terminals per channel and wiper-to-B shorting is acceptable |
Compared with MCP4441T-502E/ST, the MCP4461T-502E/ST offers higher resolution for tighter gain matching, while the MCP4442T-502E/ST simplifies layout by eliminating unused potentiometer terminals-both retain identical supply, temperature, and I²C timing specs.
Availability
MCP4441T-502E/ST is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor calibration systems, LED drivers, and power supply feedback networks requiring stable component supply with guaranteed long-term sourcing.
Supply support for MCP4441T-502E/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a leading provider of microcontrollers, analog components, and connectivity solutions, headquartered in Chandler, Arizona.
The MCP444X family is designed for precision analog control in embedded systems-delivering nonvolatile, multi-channel digital potentiometers with industrial-grade temperature range and robust I²C interface for calibration, tuning, and trimming functions.
FAQ
What is the RAB resistance value of the MCP4441T-502E/ST?
The MCP4441T-502E/ST has a nominal end-to-end resistance of 5 kΩ, with a tolerance of ±20% as specified in the DS22265A datasheet. This value is confirmed by the "-502" suffix in the part number, where "502" decodes to 5.0 × 10² = 5,000 Ω. The resistance applies to all four independent potentiometer channels and is characterized over the full operating temperature range of –40°C to +125°C.
Does the MCP4441T-502E/ST support I²C communication at 3.4 MHz?
Yes, the MCP4441T-502E/ST supports High-Speed I²C mode up to 3.4 MHz, as documented in Section 1.1 of DS22265A. This requires VDD ≥ 4.5V and bus capacitance ≤ 100 pF. At this speed, the device achieves fast wiper updates-critical for real-time control loops-and maintains full functionality including EEPROM read/write and TCON register access.
How does WiperLock™ technology function on the MCP4441T-502E/ST?
WiperLock™ on the MCP4441T-502E/ST is activated by applying ≥9.0V to the HVC/A0 pin, which disables all wiper position changes until the voltage drops below the exit threshold (VDD + 0.8V). This hardware-based lock prevents unintended adjustments during system operation or ESD events, and operates independently of I²C commands-ensuring robust protection even if firmware fails.
What package type is used for the MCP4441T-502E/ST?
The MCP4441T-502E/ST is supplied in a TSSOP-20 package (4.4 mm × 6.5 mm, 0.65 mm pitch), as confirmed by the "/ST" suffix and package diagrams in DS22265A-page 2. This thermally enhanced, surface-mount outline supports automated assembly and provides 1110 mW power dissipation capability at TA = +50°C, making it suitable for dense industrial PCB layouts.
Can the MCP4441T-502E/ST operate from a 1.8V supply?
No-the MCP4441T-502E/ST requires a minimum VDD of 2.7V for full specification compliance, including resistor network accuracy and I²C timing. While the datasheet notes "1.8V to 5.5V - Device Operation", Section 2.0 clarifies that analog characteristics (RAB, tempco, bandwidth) are only guaranteed from 2.7V to 5.5V. Operating below 2.7V may result in undefined wiper behavior or EEPROM corruption.
MCP4441T-502E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- WiperLock™
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 129
- Resistance (Ohms):
- 5k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 1.8V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 150ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 75
MCP4441T-502E/ST FAQ
1.How can I place an order for MCP4441T-502E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP4441T-502E/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP4441T-502E/ST reliable?
The price and inventory of MCP4441T-502E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP4441T-502E/ST is usually 5 days.
3.What payment methods are accepted for MCP4441T-502E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP4441T-502E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP4441T-502E/ST?
MCP4441T-502E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP4441T-502E/ST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP4441T-502E/ST?
For technical support, including MCP4441T-502E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP4441T-502E/ST requirements.
6.How does Aetrix verify that MCP4441T-502E/ST is sourced from the original manufacturer or authorized distributors?
All MCP4441T-502E/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP4441T-502E/ST meets industry standards.
7.What is the process for return or replacement of MCP4441T-502E/ST?
All MCP4441T-502E/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP4441T-502E/ST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP4441T-502E/ST part is unused and in its original packaging.
Return procedure for MCP4441T-502E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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