component
MCP4021-103E
Public Made by Adomby adom
Microchip Tech Digital Potentiometers, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MCP4021-103E
Microchip Tech · Digital Potentiometers · MSOP-8
MCP4021-103E 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, relative to VSS from 2.7V to 5.5V, with a decoupling capacitor to VSS recommended. |
| 2 | VSS | power_in | Device ground reference. |
| 3 | A | passive | Potentiometer terminal A, the fixed connection to the 0x3F end of the pot; carries positive or negative current and must be between VSS and VDD. |
| 4 | W | passive | Potentiometer wiper terminal, the adjustable terminal; carries positive or negative current and must be between VSS and VDD. |
| 5 | CS | input | Chip select input, TTL compatible; VIL enables serial commands, VIHH enables high-voltage commands (including WiperLock enable/disable), with an internal pull-up that is disabled below VIH. |
| 6 | B | passive | Potentiometer terminal B, the fixed connection to the 0x00 end of the pot; carries positive or negative current and must be between VSS and VDD. |
| 7 | NC | unconnected | No connection. |
| 8 | U/D | input | Increment/Decrement input, TTL compatible; an increment moves the wiper one step toward terminal A and a decrement one step toward terminal B. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | MSOP-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 voltage | 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 | -0.3 | 6 | V | VDD + 0.3V as printed (6.0 is not printed; see note) | 2 | ||
| Storage temperature | -65 | 150 | °C | 2 | |||
| Ambient temp. with power applied | -55 | 125 | °C | 2 | |||
| Maximum Junction Temperature | TJ | 150 | °C | 2 | |||
| Current at Potentiometer Pins | -2.5 | 2.5 | mA | ±2.5 mA | 2 | ||
| Current at Input Pins | -10 | 10 | mA | ±10 mA | 2 | ||
| Current at Supply Pins | -10 | 10 | mA | ±10 mA | 2 | ||
| Resistance (A to B) | RAB | 8 | 10 | 12 | kΩ | -103 devices (Note 1) | 2 |
| Resistance tolerance | RAB | -20 | 20 | % | ±20% | 2 | |
| Supply Current, active | IDD | 45 | µA | 5.5V, CS = VSS, fU/D = 1 MHz | 2 | ||
| Supply Current, active | IDD | 15 | µA | 2.7V, CS = VSS, fU/D = 1 MHz | 2 | ||
| Supply Current, inactive | IDD | 0.3 | 1 | µA | Serial Interface Inactive (CS = VIH, U/D = VIH) | 2 | |
| Supply Current, EE write | IDD | 0.6 | 3 | mA | EE Write cycle, TA = +25°C | 2 | |
| CS Input Voltage | VCS | 0 | 12.5 | V | VSS to 12.5V (Note 6) | 2 | |
| Resolution | N | 64 | Taps | No Missing Codes | 2 | ||
| Wiper Resistance | RW | 70 | 125 | Ω | 5.5V | 3 | |
| Wiper Resistance | RW | 70 | 325 | Ω | 2.7V | 3 | |
| Nominal Resistance Tempco | ΔR/ΔT | 50 | ppm/°C | TA = -20°C to +70°C | 3 | ||
| Nominal Resistance Tempco | ΔR/ΔT | 100 | ppm/°C | TA = -40°C to +85°C | 3 | ||
| Nominal Resistance Tempco | ΔR/ΔT | 150 | ppm/°C | TA = -40°C to +125°C | 3 | ||
| Ratiometric Tempco | ΔVWA/ΔT | 10 | ppm/°C | MCP4021 and MCP4023 only, code = 1Fh | 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 INL | INL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Potentiometer DNL | DNL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Resistor Terminal Input Voltage Range | VA,VW,VB | 0 | V | Vss to VDD; Note 5, Note 6 | 3 | ||
| Maximum current through A, W or B | IW | 2.5 | mA | Note 6 | 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 | 1 | MHz | -103 devices, Code = 1F, output load = 30 pF | 3 | ||
| Rheostat INL | R-INL | -0.5 | 0.25 | 0.5 | LSb | -103 devices (10 kΩ), 5.5V | 4 |
| Rheostat INL | R-INL | -3 | 1 | 3 | LSb | -103 devices (10 kΩ), 2.7V (Note 7) | 4 |
| Rheostat DNL | R-DNL | -0.5 | 0.25 | 0.5 | LSb | -103 devices (10 kΩ), 5.5V | 4 |
| Rheostat DNL | R-DNL | -1 | 0 | 1 | LSb | -103 devices (10 kΩ), 2.7V (Note 7) | 4 |
| Input High Voltage | VIH | 0.7 | V | 0.7 VDD (min, in units of VDD) | 5 | ||
| Input Low Voltage | VIL | 0.3 | V | 0.3 VDD (max, in units of VDD) | 5 | ||
| High-Voltage Input Entry Voltage | VIHH | 9 | 12.5 | V | -40°C to +125°C | 5 | |
| High-Voltage Input Entry Voltage | VIHH | 8.5 | 12.5 | V | +7°C to +125°C | 5 | |
| High-Voltage Input Exit Voltage | VIHH | 0.8 | V | VDD+0.8 max (offset from VDD) | 5 | ||
| 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 | ||
| Input Leakage Current | IIL | -1 | 1 | µA | VIN = VDD | 5 | |
| CS and U/D Pin Capacitance | CIN, COUT | 10 | pF | fC = 1 MHz | 5 | ||
| Power Supply Sensitivity | PSS | 0.0015 | 0.0035 | %/% | VDD = 4.5V to 5.5V, VA = 4.5V, Code = 1Fh (MCP4021/23 only) | 5 | |
| CS Low Time | tCSLO | 5 | µs | 6 | |||
| CS High Time | tCSHI | 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 | |||
| Up/Down Toggle Frequency | fUD | 1 | MHz | 6 | |||
| Internal EEPROM Write Time | twc | 10 | ms | -40°C to +125°C | 6 | ||
| Thermal Resistance, 8L-MSOP | θJA | 206 | °C/W | 10 | |||
| Operating Temperature Range | TA | -40 | 125 | °C | 10 |
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:
MCP4021-103E - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
mcp4021-103e-etched.step/mcp4021-103e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp4021-103e.step/mcp4021-103e.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 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# MCP4021-103E
**Microchip Tech** · Digital Potentiometers · MSOP-8
MCP4021-103E 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, relative to VSS from 2.7V to 5.5V, with a decoupling capacitor to VSS recommended. |
| 2 | VSS | power_in | Device ground reference. |
| 3 | A | passive | Potentiometer terminal A, the fixed connection to the 0x3F end of the pot; carries positive or negative current and must be between VSS and VDD. |
| 4 | W | passive | Potentiometer wiper terminal, the adjustable terminal; carries positive or negative current and must be between VSS and VDD. |
| 5 | CS | input | Chip select input, TTL compatible; VIL enables serial commands, VIHH enables high-voltage commands (including WiperLock enable/disable), with an internal pull-up that is disabled below VIH. |
| 6 | B | passive | Potentiometer terminal B, the fixed connection to the 0x00 end of the pot; carries positive or negative current and must be between VSS and VDD. |
| 7 | NC | unconnected | No connection. |
| 8 | U/D | input | Increment/Decrement input, TTL compatible; an increment moves the wiper one step toward terminal A and a decrement one step toward terminal B. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | MSOP-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 voltage | 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 | | -0.3 | | 6 | V | VDD + 0.3V as printed (6.0 is not printed; see note) | 2 |
| Storage temperature | | -65 | | 150 | °C | | 2 |
| Ambient temp. with power applied | | -55 | | 125 | °C | | 2 |
| Maximum Junction Temperature | TJ | | | 150 | °C | | 2 |
| Current at Potentiometer Pins | | -2.5 | | 2.5 | mA | ±2.5 mA | 2 |
| Current at Input Pins | | -10 | | 10 | mA | ±10 mA | 2 |
| Current at Supply Pins | | -10 | | 10 | mA | ±10 mA | 2 |
| Resistance (A to B) | RAB | 8 | 10 | 12 | kΩ | -103 devices (Note 1) | 2 |
| Resistance tolerance | RAB | -20 | | 20 | % | ±20% | 2 |
| Supply Current, active | IDD | | 45 | | µA | 5.5V, CS = VSS, fU/D = 1 MHz | 2 |
| Supply Current, active | IDD | | 15 | | µA | 2.7V, CS = VSS, fU/D = 1 MHz | 2 |
| Supply Current, inactive | IDD | | 0.3 | 1 | µA | Serial Interface Inactive (CS = VIH, U/D = VIH) | 2 |
| Supply Current, EE write | IDD | | 0.6 | 3 | mA | EE Write cycle, TA = +25°C | 2 |
| CS Input Voltage | VCS | 0 | | 12.5 | V | VSS to 12.5V (Note 6) | 2 |
| Resolution | N | | 64 | | Taps | No Missing Codes | 2 |
| Wiper Resistance | RW | | 70 | 125 | Ω | 5.5V | 3 |
| Wiper Resistance | RW | | 70 | 325 | Ω | 2.7V | 3 |
| Nominal Resistance Tempco | ΔR/ΔT | | 50 | | ppm/°C | TA = -20°C to +70°C | 3 |
| Nominal Resistance Tempco | ΔR/ΔT | | 100 | | ppm/°C | TA = -40°C to +85°C | 3 |
| Nominal Resistance Tempco | ΔR/ΔT | | 150 | | ppm/°C | TA = -40°C to +125°C | 3 |
| Ratiometric Tempco | ΔVWA/ΔT | | 10 | | ppm/°C | MCP4021 and MCP4023 only, code = 1Fh | 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 INL | INL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Potentiometer DNL | DNL | -0.5 | 0.25 | 0.5 | LSb | MCP4021/23 only (Note 2) | 3 |
| Resistor Terminal Input Voltage Range | VA,VW,VB | 0 | | | V | Vss to VDD; Note 5, Note 6 | 3 |
| Maximum current through A, W or B | IW | | | 2.5 | mA | Note 6 | 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 | | 1 | | MHz | -103 devices, Code = 1F, output load = 30 pF | 3 |
| Rheostat INL | R-INL | -0.5 | 0.25 | 0.5 | LSb | -103 devices (10 kΩ), 5.5V | 4 |
| Rheostat INL | R-INL | -3 | 1 | 3 | LSb | -103 devices (10 kΩ), 2.7V (Note 7) | 4 |
| Rheostat DNL | R-DNL | -0.5 | 0.25 | 0.5 | LSb | -103 devices (10 kΩ), 5.5V | 4 |
| Rheostat DNL | R-DNL | -1 | 0 | 1 | LSb | -103 devices (10 kΩ), 2.7V (Note 7) | 4 |
| Input High Voltage | VIH | 0.7 | | | V | 0.7 VDD (min, in units of VDD) | 5 |
| Input Low Voltage | VIL | | | 0.3 | V | 0.3 VDD (max, in units of VDD) | 5 |
| High-Voltage Input Entry Voltage | VIHH | 9 | | 12.5 | V | -40°C to +125°C | 5 |
| High-Voltage Input Entry Voltage | VIHH | 8.5 | | 12.5 | V | +7°C to +125°C | 5 |
| High-Voltage Input Exit Voltage | VIHH | | | 0.8 | V | VDD+0.8 max (offset from VDD) | 5 |
| 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 |
| Input Leakage Current | IIL | -1 | | 1 | µA | VIN = VDD | 5 |
| CS and U/D Pin Capacitance | CIN, COUT | | 10 | | pF | fC = 1 MHz | 5 |
| Power Supply Sensitivity | PSS | | 0.0015 | 0.0035 | %/% | VDD = 4.5V to 5.5V, VA = 4.5V, Code = 1Fh (MCP4021/23 only) | 5 |
| CS Low Time | tCSLO | 5 | | | µs | | 6 |
| CS High Time | tCSHI | 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 |
| Up/Down Toggle Frequency | fUD | | | 1 | MHz | | 6 |
| Internal EEPROM Write Time | twc | | | 10 | ms | -40°C to +125°C | 6 |
| Thermal Resistance, 8L-MSOP | θJA | | 206 | | °C/W | | 10 |
| Operating Temperature Range | TA | -40 | | 125 | °C | | 10 |
## 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: `MCP4021-103E`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `mcp4021-103e-etched.step` / `mcp4021-103e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp4021-103e.step` / `mcp4021-103e.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](docs/mcp4021-103e-datasheet.pdf) (74 pp, sha256 `6d9ee87ab7f5b4fc`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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](docs/mcp4021-103e-datasheet.pdf)