component
MCP4021T-202E
Public Made by Adomby adom
Microchip Tech Digital Potentiometers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownMCP4021T-202E
Microchip Tech · Digital Potentiometers · SOIC-8
MCP4021T-202E from Microchip Tech, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Positive power supply input, which can range from 2.7V to 5.5V relative to VSS; a decoupling capacitor on VDD to VSS is recommended. |
| 2 | VSS | power_in | Device ground reference. |
| 3 | A | passive | Potentiometer terminal A, the fixed connection to the 0x3F terminal; the voltage must be between VSS and VDD and it can carry positive and negative current. |
| 4 | W | passive | Potentiometer wiper terminal, the adjustable terminal; the voltage must be between VSS and VDD and it can carry positive and negative current. |
| 5 | CS | input | Chip select input; forcing VIL enables serial commands, and it has an internal pull-up that is disabled when the voltage is below VIH. |
| 6 | B | passive | Potentiometer terminal B, the fixed connection to the 0x00 terminal; the voltage must be between VSS and VDD and it can carry positive and negative current. |
| 7 | NC | unconnected | No connection. |
| 8 | U/D | input | Increment/decrement input that moves the wiper one step toward terminal A on increment and toward terminal B on decrement. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-8 |
| Category | ADC/DAC/Data Conversion |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Voltage Range | VDD | 2.7 | 5.5 | V | 2 | ||
| Supply Current (serial interface inactive) | IDD | 0.3 | 1 | µA | Serial Interface Inactive (CS = VIH, U/D = VIH) | 2 | |
| Supply Current (EE write cycle) | IDD | 0.6 | 3 | mA | EE Write cycle, TA = +25°C | 2 | |
| Resistance tolerance | RAB | -20 | 20 | % | -202 devices (Note 1) | 2 | |
| Resistance (nominal end-to-end) | RAB | 1.68 | 2.1 | 2.52 | k | -202 devices (Note 1) | 2 |
| Wiper Resistance | RW | 70 | 125 | Ω | 5.5V | 3 | |
| Wiper Resistance | RW | 70 | 325 | Ω | 2.7V | 3 | |
| Full-Scale Error | VWFSE | -0.5 | -0.1 | 0.5 | LSb | Code 3Fh (MCP4021/23 only) | 3 |
| Zero-Scale Error | VWZSE | -0.5 | 0.1 | 0.5 | LSb | Code 00h (MCP4021/23 only) | 3 |
| Potentiometer Integral Non-linearity | INL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Potentiometer Differential Non-linearity | DNL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Maximum current through A, W or B | IW | 2.5 | mA | Note 6 | 3 | ||
| Rheostat Integral Non-linearity | R-INL | -0.5 | 0.25 | 0.5 | LSb | -202 devices (2.1 k), 5.5V | 4 |
| Rheostat Integral Non-linearity | R-INL | -8.5 | 4.5 | 8.5 | LSb | -202 devices (2.1 k), 2.7V (Note 7) | 4 |
| Rheostat Differential Non-linearity | R-DNL | -0.5 | 0.25 | 0.5 | LSb | -202 devices (2.1 k), 5.5V | 4 |
| Rheostat Differential Non-linearity | R-DNL | -1 | 0.5 | 2 | LSb | -202 devices (2.1 k), 2.7V (Note 7) | 4 |
| Input High Voltage | VIH | 0.7 | VDD | CS, U/D | 5 | ||
| Input Low Voltage | VIL | 0.3 | VDD | CS, U/D | 5 | ||
| High-Voltage Input Entry Voltage (WiperLock threshold) | VIHH | 8.5 | 12.5 | V | +7°C to +125°C | 5 | |
| High-Voltage Input Entry Voltage (WiperLock threshold) | VIHH | 9 | 12.5 | V | -40°C to +125°C | 5 | |
| CS Input Voltage | VCS | 12.5 | V | 2 | |||
| Input Leakage Current | IIL | -1 | 1 | µA | VIN = VDD | 5 | |
| Power Supply Sensitivity | PSS | 0.0015 | 0.0035 | %/% | VDD = 4.5V to 5.5V, VA = 4.5V, Code = 1Fh (MCP4021 and MCP4023 only) | 5 | |
| CS Low Time | tCSLO | 5 | µs | 6 | |||
| CS High Time | tCSHI | 500 | ns | 6 | |||
| U/D to CS Hold Time | tLUC | 500 | ns | 6 | |||
| CS to U/D Low Setup Time | tLCUF | 500 | ns | 6 | |||
| CS to U/D High Setup Time | tLCUR | 3 | µs | 6 | |||
| U/D High Time | tHI | 500 | ns | 6 | |||
| U/D Low Time | tLO | 500 | ns | 6 | |||
| Up/Down Toggle Frequency | fUD | 1 | MHz | 6 | |||
| Wiper Settling Time | tS | 0.5 | µs | 2.1 k CL = 100 pF | 6 | ||
| Internal EEPROM Write Time | twc | 5 | ms | @25°C | 6 | ||
| Internal EEPROM Write Time | twc | 10 | ms | -40°C to +125°C | 6 | ||
| VDD | VDD | 6.5 | V | 2 | |||
| CS and U/D inputs w.r.t VSS | VCS, VU/D | -0.3 | 12.5 | V | 2 | ||
| Current at Input Pins | -10 | 10 | mA | 2 | |||
| Current at Supply Pins | -10 | 10 | mA | 2 | |||
| Current at Potentiometer Pins | -2.5 | 2.5 | mA | 2 | |||
| Ambient temp. with power applied | TA | -55 | 125 | °C | 2 | ||
| Maximum Junction Temperature | TJ | 150 | °C | 2 | |||
| Specified Temperature Range | TA | -40 | 125 | °C | 10 | ||
| Operating Temperature Range | TA | -40 | 125 | °C | 10 | ||
| Storage Temperature Range | TA | -65 | 150 | °C | 10 | ||
| Thermal Resistance, 8L-SOIC | θJA | 117 | °C/W | 10 | |||
| Nominal Resistance Tempco | R/T | 50 | ppm/°C | TA = -20°C to +70°C | 3 | ||
| Nominal Resistance Tempco | R/T | 100 | ppm/°C | TA = -40°C to +85°C | 3 | ||
| Nominal Resistance Tempco | R/T | 150 | ppm/°C | TA = -40°C to +125°C | 3 | ||
| Ratiometric Tempco | VWA/T | 10 | ppm/°C | MCP4021 and MCP4023 only, code = 1Fh | 3 | ||
| Leakage current into A, W or B | IWL | 100 | nA | MCP4021 A = W = B = VSS | 3 | ||
| Capacitance (PA) | CAW | 75 | pF | f =1 MHz, code = 1Fh | 3 | ||
| Capacitance (PW) | CW | 120 | pF | f =1 MHz, code = 1Fh | 3 | ||
| Capacitance (PB) | CBW | 75 | pF | f =1 MHz, code = 1Fh | 3 | ||
| Bandwidth -3 dB | BW | 4 | MHz | -202 devices, Code = 1F, output load = 30 pF | 3 | ||
| CS Pull-up/Pull-down Resistance | RCS | 16 | k | VDD = 5.5V, VCS = 3V | 5 | ||
| CS Weak Pull-up/Pull-down Current | IPU | 170 | µA | VDD = 5.5V, VCS = 3V | 5 | ||
| CS and U/D Pin Capacitance | CIN, COUT | 10 | pF | fC = 1 MHz | 5 | ||
| Wiper Response on Power-Up | tPU | 200 | ns | 6 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 | 65 |
CAD (KiCad official)
- Symbol:
MCP4021T-202E - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
mcp4021t-202e-etched.step/mcp4021t-202e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp4021t-202e.step/mcp4021t-202e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (74 pp, sha256
6d9ee87ab7f5b4fc, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).