MCP40D18T-502E/LT Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock
Microchip MCP40D18T-502E/LT is a single-channel 7-bit I2C digital potentiometer with 50 kΩ end-to-end resistance, 128 steps, and a 2 kHz bandwidth in a compact SOT-23-6 package. It enables software-controlled resistance adjustment for gain, offset, and calibration circuits. Available worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- MCP40D18T-502E/LT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5300(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
- 50 kΩ single-channel digital potentiometer with 128-position 7-bit resolution for fine-grained software control over gain, bias, and calibration circuits
- I2C (2-wire serial) interface with volatile wiper setting enables easy integration with any microcontroller using just 2 signal lines and no dedicated SPI bus
- Miniature SOT-23-6 surface-mount package occupies minimal PCB area, ideal for space-constrained portable and wearable applications requiring digitally programmable resistance
Applications
The MCP40D18T-502E/LT is commonly used in sensor-signal conditioning circuits where software-adjustable gain or offset trimming replaces manual potentiometer calibration, reducing production test time. It suits audio volume and tone control in consumer electronics, as well as LCD bias adjustment and op-amp feedback network tuning in industrial instruments. Any embedded design that needs non-mechanical, I2C-driven resistance adjustment across 128 discrete steps benefits from its compact SOT-23-6 footprint and 50 kΩ range.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 15Weeks |
| YTEOL | 0 |
| Bandwidth-Nom | 2kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 128 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Resistance Law | LINEAR |
| Resistance Tolerance-Max | 20% |
| Resistor Terminal Voltage-Max | 5.5V |
| Screening Level | TS 16949 |
| Supply Current-Max | 0.08mA |
| 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 |
| Total Resistance-Nom | 5000Ω |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | 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 MCP40D18T-502E/LT provide, and what does that mean for resolution?
The MCP40D18T-502E/LT offers 128 positions (7-bit resolution) across a 50 kΩ end-to-end resistance, giving a step size of approximately 390 Ω per increment. This resolution is sufficient for gain trimming in op-amp circuits, audio volume control, and bias adjustment in sensor front-ends where coarse mechanical potentiometers introduce variability across production units.
For a battery-powered sensor node, what interface and supply requirements does the MCP40D18T-502E/LT impose?
The MCP40D18T-502E/LT uses a standard I2C 2-wire serial interface, requiring only SDA and SCL lines from the host MCU with no dedicated chip-select pin. It operates from a 2.7 V to 5.5 V supply, making it compatible with both 3.3 V and 5 V microcontrollers without level translation. Its low quiescent current further supports battery-powered designs where minimizing idle consumption across milliamp budgets is critical.
When would MCP40D18T-502E/LT be preferred over a mechanical trimmer in a production calibration flow?
Replacing a manual trimmer with the MCP40D18T-502E/LT allows in-circuit calibration commands over the I2C bus during automated test, eliminating the need for a screwdriver access hole and reducing calibration cycle time from minutes to milliseconds. The volatile wiper setting means the resistance value is loaded fresh on each power cycle, which suits applications where calibration coefficients are stored in MCU flash and applied at startup rather than retained in the potentiometer itself.
What bandwidth limitation should designers consider when using MCP40D18T-502E/LT in signal-path applications?
The MCP40D18T-502E/LT has a nominal bandwidth of 2 kHz, which constrains its use to low-frequency signal paths such as audio bass/treble control, DC bias networks, and slow sensor-conditioning stages. For applications above 2 kHz such as RF or high-speed video circuits, a higher-bandwidth digital potentiometer or a discrete DAC-plus-resistor topology should be evaluated instead to avoid signal attenuation and phase distortion.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5790 | $0.58 |
| 100+ | $0.5300 | $53.00 |
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