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MCP4021-202E

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Microchip Tech Digital Potentiometers, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MCP4021-202E

Microchip Tech · Digital Potentiometers · MSOP-8

MCP4021-202E from Microchip Tech, in a MSOP-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, specified from 2.7V to 5.5V relative to VSS, with a decoupling capacitor on VDD to VSS recommended for maximum performance.
2 VSS power_in Ground reference for the device.
3 A bidirectional Potentiometer terminal A, the fixed connection to the 0x3F tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current.
4 W bidirectional Potentiometer wiper terminal, the adjustable tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current.
5 CS input Chip select input: driving VIL enables serial commands, driving VIHH enables high-voltage commands that also control WiperLock, and an internal pull-up holds it at VIH when floating.
6 B bidirectional Potentiometer terminal B, the fixed connection to the 0x00 tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current.
7 NC unconnected No internal connection.
8 U/D input TTL-compatible increment/decrement input that moves the wiper one step toward terminal A when incremented and toward terminal B when decremented.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package MSOP-8
Category Data Acquisition
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
CS Input Voltage VCS 12.5 V The CS pin will be at one of three input levels (VIL, VIH or VIHH). (Note 6) 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 RAB (-202 device) RAB 1.68 2.1 2.52 kΩ -202 devices (Note 1) 2
Resistance tolerance (RAB, -202) -20 20 % (± 20%) on RAB, -202 devices 2
Wiper Resistance, 5.5V RW 70 125 Ω 5.5V (Note 3, Note 4) 3
Wiper Resistance, 2.7V RW 70 325 Ω 2.7V (Note 3, Note 4) 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, 5.5V (-202, 2.1 k) R-INL -0.5 0.25 0.5 LSb -202 devices (2.1 k), 5.5V (Note 4, Note 8) 4
Rheostat Integral Non-linearity, 2.7V (-202, 2.1 k) R-INL -8.5 4.5 8.5 LSb -202 devices (2.1 k), 2.7V (Note 7) 4
Rheostat Differential Non-linearity, 5.5V (-202, 2.1 k) R-DNL -0.5 0.25 0.5 LSb -202 devices (2.1 k), 5.5V (Note 4, Note 8) 4
Rheostat Differential Non-linearity, 2.7V (-202, 2.1 k) R-DNL -1 0.5 2 LSb -202 devices (2.1 k), 2.7V (Note 7) 4
High-Voltage Input Entry Voltage (Threshold for WiperLock) VIHH 8.5 12.5 V +7°C to +125°C 5
High-Voltage Input Entry Voltage (Threshold for WiperLock) VIHH 9 12.5 V -40°C to +125°C 5
Input Leakage Current (CS, U/D) IIL -1 1 µA VIN = VDD 5
Internal EEPROM Write Time twc 5 ms @25°C 6
Internal EEPROM Write Time twc 10 ms -40°C to +125°C 6
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 (-202) tS 0.5 µs 2.1 k CL = 100 pF 6
HV U/D to CS Hold Time tHUC 1.5 µs 8
HV CS to U/D Low Setup Time tHCUF 8 µs 8
HV CS to U/D High Setup Time tHCUR 4.5 µs 8
Power Supply Sensitivity PSS 0.0015 0.0035 %/% VDD = 4.5V to 5.5V, VA = 4.5V, Code = 1Fh 5
Maximum VDD (absolute) VDD 6.5 V 2
CS and U/D inputs w.r.t VSS -0.3 12.5 V 2
A, B and W terminals w.r.t VSS (upper limit VDD + 0.3 V) -0.3 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
Storage temperature -65 150 °C 2
Ambient temperature with power applied -55 125 °C 2
ESD protection (HBM) 4 kV HBM 2
ESD protection (MM) 400 V MM 2
Maximum Junction Temperature TJ 150 °C 2
Operating Temperature Range TA -40 125 °C 10
Ratiometric Temperature Coefficient VWA/T 10 ppm/°C MCP4021 and MCP4023 only, code = 1Fh 3
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
Typical Step Resistance (RS) RS 33.33 Ω MCP402X-202E 42
Supply Current, 5.5V IDD 45 µA 5.5V, CS = VSS, fU/D = 1 MHz 2
CS Pull-up/Pull-down Resistance RCS 16 kΩ 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
Bandwidth -3 dB (-202) BW 4 MHz Code = 1F, output load = 30 pF 3
Thermal Resistance, 8L-MSOP θJA 206 °C/W 10
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: MCP4021-202E
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: mcp4021-202e-etched.step / mcp4021-202e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp4021-202e.step / mcp4021-202e.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (74 pp, sha256 6d9ee87ab7f5b4fc, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF