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Microchip Technology MCP4441T-103E/ST
- Part No.:
- MCP4441T-103E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP4441T-103E/ST.pdf
- Description:
- IC DGT POT 10KOHM 129TAP 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
MCP4441T-103E/ST from Microchip Technology is a 7-bit quad I²C digital potentiometer with nonvolatile EEPROM memory, 10 kΩ end-to-end resistance (RAB), WiperLock™ technology, and operation from 2.7V to 5.5V. It provides four independent potentiometer channels for precision analog voltage division in biasing, gain control, and calibration circuits across industrial and automotive systems.
For engineers reviewing the MCP4441T-103E/ST datasheet, MCP4441T-103E/ST pinout, MCP4441T-103E/ST application, or MCP4441T-103E/ST equivalent, key selection criteria include its 129-tap resolution, 75 Ω typical wiper resistance, 15 ppm/°C ratiometric tempco, EEPROM retention of wiper settings after power loss, and support for I²C speeds up to 3.4 MHz.
Technical Context
The MCP4441T-103E/ST integrates four independent 7-bit resistor networks (129 taps) with configurable potentiometer or rheostat operation via terminal disconnect control (TCON registers). Each channel features nonvolatile wiper storage, automatic recall at power-up, and hardware/software write protection.
Its I²C interface supports Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes with Schmitt-triggered inputs, high-voltage tolerant digital pins (up to 12.5 V), and brown-out reset (1.65 V typical). The device operates across –40°C to +125°C and supports split-rail analog configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RAB Resistance | 10 kΩ ±20% - defines full-scale analog voltage division range and load interaction in feedback/gain circuits |
| Resolution | 7-bit / 129 taps - enables 0.78% step granularity for fine analog tuning without excessive code density |
| Wiper Resistance | 75 Ω typical - minimizes signal path error and insertion loss in low-impedance applications |
| Ratiometric Tempco | 15 ppm/°C - ensures stable voltage division ratio over temperature in precision reference or sensor conditioning |
| I²C Speed Support | Up to 3.4 MHz - allows rapid wiper updates in real-time closed-loop control or dynamic calibration |
| Nonvolatile Memory | EEPROM wiper + 5 GP locations - retains calibrated settings across power cycles without external backup |
| 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 under-hood automotive, industrial motor control, and harsh-environment use |
Pinout & Package
TSSOP-20 package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal dissipation. Pinout optimized for dual-supply and I²C bus routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0A, P0W, P0B | Channel 0 potentiometer terminals | A/W/B connections for first 10 kΩ resistor network; floating A or B enables rheostat mode |
| P1A, P1W, P1B | Channel 1 potentiometer terminals | Independent second 10 kΩ network; electrically isolated from other channels |
| P2A, P2W, P2B | Channel 2 potentiometer terminals | Third 10 kΩ network with identical specs; supports multi-channel trimming |
| P3A, P3W, P3B | Channel 3 potentiometer terminals | Fourth 10 kΩ network; all four channels share common I²C and control logic |
| SCL, SDA | I²C serial interface | Open-drain bidirectional bus lines with internal weak pull-ups; support 3.4 MHz timing |
| WP | Hardware write protect | Active-low pin that disables EEPROM and wiper writes when asserted |
| RESET | Asynchronous reset input | Forces all wipers to nonvolatile stored values and clears volatile registers |
| HVC/A0 | High-voltage command / address bit | Enables WiperLock™ when driven >9 V; also serves as LSB I²C address bit |
| A1 | I²C address bit | MSB of 7-bit I²C slave address; sets one of four possible addresses |
| VDD, VSS | Power supply rails | 2.7–5.5 V analog/digital supply and ground; supports split-rail analog interfacing |
Key Features
| Feature | Design Value |
|---|---|
| WiperLock™ Technology | Prevents unintended wiper changes during EMI events or software glitches by requiring high-voltage activation |
| Automatic NV Recall | Restores last-saved wiper positions on power-up-eliminates startup drift in calibration-critical systems |
| Terminal Disconnect Control | TCON registers allow individual A/W/B terminals to be disconnected-enables true open-circuit or high-Z states per channel |
| High-Voltage Tolerant Inputs | Digital pins withstand up to 12.5 V-simplifies level-shifting in mixed-voltage systems and enables direct HV control signaling |
| Brown-Out Reset | Internal POR/BOR triggers below 1.65 V-ensures reliable initialization even during unstable power ramp-up |
| Split-Rail Compatibility | Resistor terminals operate from VSS to VDD-supports bipolar signal conditioning and rail-to-rail analog interfaces |
Applications
| LED Brightness Control | Sensor Signal Conditioning |
|---|---|
Use Scenario: Adjusting current through high-brightness LEDs in automotive lighting or industrial status indicators. IC Role / Device Role / Timing Role: Four-channel digital potentiometer providing independent current-limiting resistances for RGB or multi-zone LED strings. Use Value: Enables firmware-controlled dimming without discrete resistor changes; nonvolatile storage preserves user-set brightness levels across power cycles. | Use Scenario: Calibrating offset and gain in bridge-based pressure or temperature sensor front-ends. IC Role / Device Role / Timing Role: Precision analog trim element in instrumentation amplifier feedback paths and reference voltage dividers. Use Value: 15 ppm/°C ratiometric tempco maintains calibration accuracy over –40°C to +125°C; 75 Ω wiper resistance avoids loading errors in high-impedance sensor nodes. |
| Power Supply Feedback Tuning | Audio Channel Balance Control |
Use Scenario: Dynamically adjusting output voltage setpoints in programmable DC-DC converters or LDOs. IC Role / Device Role / Timing Role: Replacing mechanical trimpots in feedback voltage dividers to enable remote or adaptive regulation. Use Value: I²C interface allows real-time adjustment during system operation; EEPROM retention ensures stable output voltage after reboot without host reinitialization. | Use Scenario: Implementing digital volume and balance control in professional audio mixers or automotive infotainment systems. IC Role / Device Role / Timing Role: Quad-channel analog attenuation element for left/right channel gain matching and stereo balance. Use Value: 129-tap resolution delivers smooth, click-free level transitions; TCON register disconnect prevents pop/click during mute or channel switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4461T-103E/ST | 8-bit resolution (257 taps), same RAB, EEPROM, and package; higher resolution but lower update speed margin at 3.4 MHz | Better suited for ultra-fine gain trimming where <0.4% step size is required; slightly higher INL/DNL at extremes | Select when 257-step granularity outweighs need for maximum I²C bandwidth |
| MCP4442T-103E/ST | Quad rheostat configuration (no potentiometer mode); identical RAB, resolution, and memory; terminal A/B tied internally | Optimized for variable-series-resistance applications like current limiting or bias current setting-not suitable for voltage divider topologies | Choose only when all four channels require two-terminal (rheostat) operation, not three-terminal potentiometer use |
Compared with MCP4461T-103E/ST, the MCP4441T-103E/ST trades resolution for faster I²C responsiveness and lower code complexity; versus MCP4442T-103E/ST, it supports full potentiometer functionality essential for voltage division, making it the only choice for feedback loop calibration and sensor biasing.
Availability
MCP4441T-103E/ST is available at Aetrix Electronics and suitable for LED driver calibration, sensor front-end trimming, power supply feedback tuning, and audio channel balancing requiring stable component supply and guaranteed long-term sourcing.
Supply support for MCP4441T-103E/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 digital potentiometers with industrial-grade temperature range, robust I²C interface, and advanced reliability features like WiperLock™.
FAQ
What is the exact end-to-end resistance tolerance and temperature coefficient of the MCP4441T-103E/ST?
The MCP4441T-103E/ST has a nominal RAB resistance of 10 kΩ with ±20% initial tolerance. Its ratiometric temperature coefficient is 15 ppm/°C (typical) over –40°C to +125°C, measured at mid-scale code (0x40), ensuring stable voltage division ratios across wide temperature ranges. Absolute tempco is 50 ppm/°C (typical) for rheostat use.
Does the MCP4441T-103E/ST retain wiper settings after power removal?
Yes, the MCP4441T-103E/ST retains wiper positions in nonvolatile EEPROM memory. Upon power-up, it automatically recalls the last-saved wiper values for all four channels. This behavior is enabled by default and requires no host intervention-critical for systems needing consistent analog settings across reboots.
How does WiperLock™ technology function on the MCP4441T-103E/ST?
WiperLock™ on the MCP4441T-103E/ST prevents accidental wiper changes by requiring the HVC/A0 pin to be driven above 9.0 V (VIHHEN) to enable write access. Once activated, wiper updates are permitted until HVC/A0 falls below VDD + 0.8 V (VIHHEX). This high-voltage gating eliminates spurious writes during noise transients or software faults.
What I²C clock frequencies does the MCP4441T-103E/ST support, and what are the bus capacitance limits?
The MCP4441T-103E/ST supports I²C clock frequencies of 100 kHz (≤400 pF), 400 kHz (≤400 pF), 1.7 MHz (≤400 pF), and 3.4 MHz (≤100 pF). At 3.4 MHz, bus capacitance must be ≤100 pF to meet rise/fall time requirements. All modes use standard I²C addressing with A1 and HVC/A0 defining the 7-bit slave address.
Can the MCP4441T-103E/ST be used in split-rail or bipolar analog circuits?
Yes, the MCP4441T-103E/ST supports split-rail operation: resistor terminals (PxA, PxW, PxB) accept voltages from VSS to VDD, enabling use in bipolar signal paths where analog signals swing above and below ground. This capability allows implementation in AC-coupled amplifiers, dual-supply sensor interfaces, and rail-to-rail analog conditioning stages.
MCP4441T-103E/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):
- 10k
- 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-103E/ST FAQ
1.How can I place an order for MCP4441T-103E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP4441T-103E/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-103E/ST reliable?
The price and inventory of MCP4441T-103E/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-103E/ST is usually 5 days.
3.What payment methods are accepted for MCP4441T-103E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP4441T-103E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP4441T-103E/ST?
MCP4441T-103E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP4441T-103E/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-103E/ST?
For technical support, including MCP4441T-103E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP4441T-103E/ST requirements.
6.How does Aetrix verify that MCP4441T-103E/ST is sourced from the original manufacturer or authorized distributors?
All MCP4441T-103E/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-103E/ST meets industry standards.
7.What is the process for return or replacement of MCP4441T-103E/ST?
All MCP4441T-103E/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP4441T-103E/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-103E/ST part is unused and in its original packaging.
Return procedure for MCP4441T-103E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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