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Microchip Technology MCP4441T-503E/ST
- Part No.:
- MCP4441T-503E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP4441T-503E/ST.pdf
- Description:
- IC DGT POT 50KOHM 129TAP 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,303
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Product details
Overview
MCP4441T-503E/ST from Microchip Technology is a 7-bit quad I²C digital potentiometer with nonvolatile EEPROM, 50 kΩ end-to-end resistance, WiperLock™ technology, and operation from 2.7V to 5.5V. It provides four independent resistor networks (P0–P3), each configurable as potentiometer or rheostat, with 129 taps, 75 Ω typical wiper resistance, and ±0.5 LSB integral nonlinearity - used for precision gain/offset trimming in industrial sensor signal conditioning circuits.
For engineers reviewing the MCP4441T-503E/ST datasheet, MCP4441T-503E/ST pinout, MCP4441T-503E/ST application, or MCP4441T-503E/ST equivalent, key selection criteria include nonvolatile wiper recall, I²C support up to 3.4 MHz, extended temperature range (−40°C to +125°C), terminal disconnect via TCON register, and hardware/software write protection for field-reprogrammable analog calibration.
Technical Context
The MCP4441T-503E/ST integrates four independent 7-bit resistor networks (RAB = 50 kΩ ±20%), each with volatile and nonvolatile wiper registers, TCON control for terminal disconnection, and EEPROM-based WiperLock™ enabling permanent wiper freeze after calibration. Its I²C interface supports Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes with Schmitt-triggered SDA/SCL inputs and high-voltage tolerant HVC/A0 pin (up to 12.5 V).
It features brown-out reset (1.65 V typical), serial interface inactive current of 2.5 µA, and ratiometric tempco of 15 ppm/°C (potentiometer mode). The device operates across 2.7V–5.5V supply and supports split-rail analog applications with resistor terminal voltage range from VSS to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 7-bit (129 taps); enables 0.78% step resolution for 50 kΩ RAB, suitable for fine analog gain adjustment. |
| RAB Resistance | 50 kΩ ±20%; matches standard feedback network values in op-amp gain stages and sensor bridge biasing. |
| Wiper Resistance | 75 Ω typical; minimizes insertion error in low-impedance signal paths and preserves linearity at mid-scale. |
| Tempco (Ratiometric) | 15 ppm/°C typical; ensures stable voltage division ratio over −40°C to +125°C, critical for uncalibrated systems. |
| I²C Speed Support | Up to 3.4 MHz; allows rapid wiper updates during dynamic calibration sequences without CPU polling overhead. |
| Nonvolatile Memory | 5 × 9-bit EEPROM + NV wiper storage; retains calibrated settings through power cycles without external backup. |
| Operating Voltage | 2.7V to 5.5V; compatible with both 3.3V and 5V microcontroller I/O domains and mixed-supply systems. |
Pinout & Package
TSSOP-20 package (4.4 mm × 6.5 mm, 0.65 mm pitch), thermally enhanced with exposed pad (EP) connected to VSS. Pinout validated per DS22265A-page 2 top-view diagram for MCP44X1 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0A, P0W, P0B | Resistor Network 0 terminals | Terminal A (high-side), W (wiper), B (low-side); configurable as potentiometer or rheostat via external connection. |
| P1A, P1W, P1B | Resistor Network 1 terminals | Independent second network; enables dual-channel gain/offset tuning in single-ended or differential front-ends. |
| P2A, P2W, P2B | Resistor Network 2 terminals | Third network; supports multi-sensor calibration or cascaded filter tuning without additional ICs. |
| P3A, P3W, P3B | Resistor Network 3 terminals | Fourth network; allows full 4-channel analog trimming in compact instrumentation modules. |
| VDD, VSS | Power supply rails | Supports 2.7V–5.5V operation; VSS also serves as thermal and electrical reference for EP pad. |
| SCL, SDA | I²C serial interface | Bi-directional, Schmitt-triggered, compliant with I²C bus timing up to 3.4 MHz (Cb ≤ 100 pF). |
| WP | Hardware write protect | Active-low pin; disables all EEPROM and wiper writes when asserted, preventing accidental reconfiguration. |
| RESET | Asynchronous reset input | Forces wipers to nonvolatile stored values and clears internal registers; 50 ns minimum pulse width. |
| HVC/A0 | High-voltage command / address bit | Accepts up to 12.5 V; enables WiperLock™ activation and selects I²C slave address (A0 = VIHH → address 0x2F). |
| A1 | I²C address bit | Second address bit; combined with HVC/A0, supports up to four devices on same I²C bus. |
Key Features
| Feature | Design Value |
|---|---|
| WiperLock™ Technology | Permanently freezes wiper position after calibration, eliminating drift risk during system runtime or power cycling. |
| Terminal Disconnect via TCON | Software-controllable open-circuit state for any resistor terminal (A/W/B), enabling safe reconfiguration without signal injection. |
| 5 General-Purpose EEPROM Locations | Stores user-defined calibration coefficients, board IDs, or firmware version data alongside wiper settings. |
| Brown-Out Reset (1.65 V) | Guarantees reliable initialization during power ramp-up, preventing undefined wiper states in low-VDD conditions. |
| High-Voltage Tolerant Digital Inputs | Withstands up to 12.5 V on HVC/A0, A1, WP, RESET, SCL, SDA - simplifies level-shifting in mixed-voltage systems. |
Applications
| Industrial Sensor Calibration | Programmable Gain Amplifier |
|---|---|
Use Scenario: Calibrating offset/gain of 4–20 mA current-loop transmitters in factory automation PLC modules. IC Role / Device Role / Timing Role: Quad potentiometer providing independent trim for zero and span adjustment on multiple sensor channels. Use Value: Nonvolatile recall eliminates need for post-power-up recalibration; 15 ppm/°C ratiometric tempco maintains accuracy across ambient shifts. |
Use Scenario: Configuring gain of instrumentation amplifiers in portable medical ECG front-ends. IC Role / Device Role / Timing Role: Digitally adjustable feedback resistor network setting precise closed-loop gain (e.g., 10×, 100×, 1000×). Use Value: 75 Ω wiper resistance minimizes gain error contribution; 3.4 MHz I²C enables real-time gain switching during patient lead detection. |
| Automotive Cabin Climate Control | Test Equipment Offset Trimming |
Use Scenario: Adjusting reference voltages for NTC thermistor interfaces in HVAC control units operating from −40°C to +125°C. IC Role / Device Role / Timing Role: Temperature-stable potentiometer replacing mechanical trimpots for factory-set reference divider ratios. Use Value: Extended temperature range and 15 ppm/°C ratiometric tempco ensure consistent setpoint accuracy without software compensation. |
Use Scenario: Factory calibration of multimeter input attenuators and reference dividers during production test. IC Role / Device Role / Timing Role: Precision resistor network storing calibrated attenuation factors in nonvolatile memory for traceable metrology. Use Value: WiperLock™ prevents tampering; 50 kΩ RAB matches standard 10:1 and 100:1 attenuator designs; TCON enables safe isolation during test sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4461T-503E/ST | 8-bit resolution (257 taps), same 50 kΩ RAB, identical package and I²C interface. | Higher resolution required for sub-0.4% step accuracy in precision DAC replacement or high-dynamic-range AGC loops. | Select when finer granularity than 129 steps is needed; otherwise MCP4441T-503E/ST offers lower cost and equal tempco/stability. |
| AD5242BRUZ50 | 256-tap I²C dual-channel (not quad); no nonvolatile wiper recall; 50 kΩ RAB; SOIC-14 package. | Limited to two independent channels; requires external EEPROM for persistent settings; lacks WiperLock™ and terminal disconnect. | Choose only if quad-channel count is unnecessary and legacy SOIC footprint is mandatory; otherwise MCP4441T-503E/ST provides superior integration and reliability. |
Compared with MCP4461T-503E/ST, the MCP4441T-503E/ST trades resolution for lower cost and identical stability; versus AD5242BRUZ50, it adds two extra channels, nonvolatile recall, and WiperLock™ - making it optimal for multi-sensor embedded calibration where persistence and channel density matter most.
Availability
MCP4441T-503E/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier design, and automotive climate control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MCP4441T-503E/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 Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP444X family is designed for precision analog trimming in harsh environments - delivering nonvolatile calibration, high-voltage tolerance, and extended temperature operation for industrial, automotive, and medical instrumentation.
FAQ
What is the RAB resistance tolerance and temperature coefficient of the MCP4441T-503E/ST?
The MCP4441T-503E/ST has an RAB resistance of 50 kΩ with ±20% initial tolerance. Its ratiometric temperature coefficient is 15 ppm/°C (typical) over −40°C to +125°C when used in potentiometer configuration, ensuring stable voltage division ratios across wide ambient ranges without software compensation.
Does the MCP4441T-503E/ST support I²C clock speeds above 400 kHz?
Yes, the MCP4441T-503E/ST supports I²C High-Speed mode up to 3.4 MHz under specific conditions: VDD ≥ 4.5 V, bus capacitance ≤ 100 pF, and proper slew-rate control. This enables rapid wiper updates during dynamic calibration sequences, reducing host processor overhead compared to standard or fast-mode operation.
How does WiperLock™ technology function on the MCP4441T-503E/ST?
WiperLock™ on the MCP4441T-503E/ST permanently freezes the wiper position of all four resistor networks after calibration. Activation requires applying ≥9.0 V to the HVC/A0 pin while issuing a specific I²C command. Once locked, wiper values cannot be altered until unlocked using the same high-voltage sequence - preventing accidental or malicious reconfiguration in deployed systems.
Can the MCP4441T-503E/ST operate from a 1.8 V supply?
No. The MCP4441T-503E/ST specifies guaranteed operation only from 2.7 V to 5.5 V. While some functional behavior may occur at 1.8 V, analog characteristics (including RAB accuracy, wiper resistance, and tempco) are not characterized below 2.7 V. For 1.8 V systems, consider the MCP4431 series, which supports 1.8 V–5.5 V operation but lacks nonvolatile memory.
What is the purpose of the TCON register in the MCP4441T-503E/ST?
The TCON (Terminal Control) register in the MCP4441T-503E/ST enables software-controlled disconnection of any resistor terminal (A, W, or B) for individual networks. This allows safe reconfiguration - such as changing potentiometer to rheostat mode or isolating a network during fault conditions - without injecting transient signals into sensitive analog circuitry.
MCP4441T-503E/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):
- 50k
- 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-503E/ST FAQ
1.How can I place an order for MCP4441T-503E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP4441T-503E/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-503E/ST reliable?
The price and inventory of MCP4441T-503E/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-503E/ST is usually 5 days.
3.What payment methods are accepted for MCP4441T-503E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP4441T-503E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP4441T-503E/ST?
MCP4441T-503E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP4441T-503E/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-503E/ST?
For technical support, including MCP4441T-503E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP4441T-503E/ST requirements.
6.How does Aetrix verify that MCP4441T-503E/ST is sourced from the original manufacturer or authorized distributors?
All MCP4441T-503E/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-503E/ST meets industry standards.
7.What is the process for return or replacement of MCP4441T-503E/ST?
All MCP4441T-503E/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP4441T-503E/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-503E/ST part is unused and in its original packaging.
Return procedure for MCP4441T-503E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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