MCP4451-103E/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP4451-103E/ST is a dual-channel 10 kΩ digital potentiometer with 256 linear positions per channel, controlled via I2C interface in a 20-pin TSSOP package. It integrates four resistor arrays including 5 kΩ, 10 kΩ, and 50 kΩ options, suited for programmable gain, offset, and calibration circuits.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP4451-103E/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2900(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
- Dual-channel digital potentiometer with 256 linear resistance steps per channel
- 10 kΩ end-to-end resistance (also available in 5 kΩ and 50 kΩ versions)
- I2C (2-wire serial) interface for simple two-line control from any microcontroller
- Volatile and non-volatile wiper position storage for power-on recall
- 20-pin TSSOP-20 package enabling compact SMT board layout
- RoHS-compliant lead-free construction (JESD-609 e3)
Applications
The MCP4451-103E/ST is used in programmable gain amplifiers, automatic gain control loops, and sensor calibration circuits in industrial measurement and test equipment. It is also deployed in power supply voltage-adjust circuits and audio balance/volume controls where two independent digitally controlled resistance channels are needed in a single compact device.
Specifications
| Manufacturer Package Code | TSSOP-20 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Additional Feature | THE RESISTOR ARRAY VALUES ARE 5000 OHM,10000 OHM, 50000 OHM |
| Bandwidth-Nom | 2kHz |
| Control Interface | 2-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 4 |
| Number of Positions | 257 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| 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 | 0.6mA |
| Supply Voltage-Nom | 3V |
| 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 | 100000Ω |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| 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 resistance steps does the MCP4451-103E/ST provide and what resolution does that give over 10 kΩ?
The MCP4451-103E/ST offers 256 linear wiper positions across a 10 kΩ end-to-end resistance, giving a step resolution of approximately 39 ohm per step. This fine resolution makes it suitable for precision gain setting and calibration trim in 12-bit and 16-bit measurement chains.
Does the MCP4451-103E/ST retain its wiper position after power cycling?
Yes, the MCP4451-103E/ST includes non-volatile memory for wiper position storage, so the last programmed resistance value across all 4 resistor elements is retained after power-off. This eliminates the need for initialization code on every startup in embedded control applications.
What I2C address options are available on the MCP4451-103E/ST for multi-device bus sharing?
The MCP4451-103E/ST supports multiple hardware-selectable I2C addresses via the A0 and A1 address pins, allowing up to 4 devices to coexist on a single 2-wire bus. The I2C interface operates at standard 100 kHz and fast 400 kHz modes.
Is the TSSOP-20 package of the MCP4451-103E/ST compatible with standard SMT pick-and-place assembly at volume?
Yes, the TSSOP-20 package with 0.65 mm pin pitch is a common SMT footprint supported by virtually all pick-and-place machines and reflow solder processes. The package body is approximately 6.5 mm x 4.4 mm, providing a compact footprint for high-density PCB layouts in volume production.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.8000 | $1.80 |
| 25+ | $1.6500 | $41.25 |
| 50+ | $1.5600 | $78.00 |
| 100+ | $1.3600 | $136.00 |
| 1000+ | $1.3000 | $1300.00 |
| 5000+ | $1.2900 | $6450.00 |
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