component
MCP4161-103E
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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MCP4161-103E
Microchip Tech · Digital Potentiometers · MSOP-8
MCP4161-103E 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 | CS | input | Chip select input: forcing CS to VIL enables serial commands and forcing it to VIHH enables high-voltage serial commands, and the input is high-voltage tolerant up to 12.5V. |
| 2 | SCK | input | SPI serial clock input, a high-voltage tolerant input with Schmitt trigger that operates at up to 10 MHz in SPI modes 0,0 and 1,1. |
| 3 | SDI/SDO | bidirectional | Multiplexed SPI serial data input/output on the MCP41X1; it acts as SDI on input and switches to SDO for reads, and the host SDO must be protected from drive conflict; SDO is an open-drain output using the internal smart pull-up. |
| 4 | VSS | power_in | Device ground reference for all pins. |
| 5 | P0A | passive | Potentiometer 0 terminal A, connected to full-scale wiper value (0x80 for 7-bit devices, 0x100 for 8-bit); voltage must be between VSS and VDD and it may carry positive or negative current. |
| 6 | P0W | passive | Potentiometer 0 wiper terminal, the adjustable terminal of the digital potentiometer; voltage must be between VSS and VDD and it may carry positive or negative current. |
| 7 | P0B | passive | Potentiometer 0 terminal B, connected to the zero-scale wiper value (0x00); voltage must be between VSS and VDD and it may carry positive or negative current. |
| 8 | VDD | power_in | Positive power supply input relative to VSS; while VDD is below Vmin (2.7V) the electrical performance may not meet the data sheet specifications. |
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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | 2.7 | 5.5 | V | 4 | ||
| Supply Voltage (serial interface only) | VDD | 1.8 | 2.7 | V | Serial Interface only | 4 | |
| VDD start voltage to ensure wiper reset | VBOR | 1.65 | V | RAM retention voltage (VRAM) < VBOR | 4 | ||
| Supply current, serial interface active | IDD | 450 | µA | Serial Interface Active, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to volatile Wiper 0 | 4 | ||
| EE write current | IDD | 1 | mA | EE Write Current, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to non-volatile Wiper 0 | 4 | ||
| Supply current, serial interface inactive | IDD | 2.5 | 5 | µA | Serial Interface Inactive, CS = VIH, VDD = 5.5V | 4 | |
| Supply current, serial interface active (decrement non-volatile wiper) | IDD | 0.55 | 1 | mA | Serial Interface Active, VDD = 5.5V, CS = VIHH, SCK @ 5 MHz, decrement non-volatile Wiper 0 | 4 | |
| Resistance RAB | RAB | 8 | 10 | 12 | kΩ | -103 devices (Note 1) | 5 |
| Resistance tolerance | -20 | 20 | % | Resistance (± 20%), -103 devices | 5 | ||
| Wiper resistance | RW | 75 | 160 | Ω | VDD = 5.5 V, IW = 2.0 mA, code = 00h | 5 | |
| Wiper resistance | RW | 75 | 300 | Ω | VDD = 2.7 V, IW = 2.0 mA, code = 00h | 5 | |
| Maximum current through A, W or B | IW | 2.5 | mA | Worst case current through wiper at Full-Scale or Zero Scale | 5 | ||
| Full-Scale Error (10 kΩ, 8-bit) | VWFSE | -3.5 | -0.1 | LSb | 10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V | 6 | |
| Zero-Scale Error (10 kΩ, 8-bit) | VWZSE | 0.1 | 3.5 | LSb | 10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V | 6 | |
| Potentiometer Integral Non-linearity 8-bit | INL | -1 | 0.5 | 1 | LSb | 8-bit 3.0V ≤ VDD ≤ 5.5V MCP4XX1 devices only (Note 2) | 6 |
| Potentiometer Differential Non-linearity 8-bit | DNL | -0.5 | 0.25 | 0.5 | LSb | 8-bit 3.0V ≤ VDD ≤ 5.5V MCP4XX1 devices only (Note 2) | 6 |
| Rheostat Integral Non-linearity (10 kΩ, 8-bit) | R-INL | -1.5 | 0.5 | 1.5 | LSb | 10 kΩ 8-bit 5.5V, IW = 450 µA | 7 |
| Rheostat Integral Non-linearity (10 kΩ, 8-bit) | R-INL | -5.5 | 2.5 | 5.5 | LSb | 10 kΩ 8-bit 3.0V, IW = 240 µA (Note 7) | 7 |
| Rheostat Differential Non-linearity (10 kΩ, 8-bit) | R-DNL | -0.5 | 0.25 | 0.5 | LSb | 10 kΩ 8-bit 5.5V, IW = 450 µA | 8 |
| Rheostat Differential Non-linearity (10 kΩ, 8-bit) | R-DNL | -1 | 0.25 | 1 | LSb | 10 kΩ 8-bit 3.0V (Note 7) | 8 |
| High Voltage Input Entry Voltage | VIHH | 8.5 | 12.5 | V | Threshold for WiperLock Technology | 9 | |
| High Voltage Limit | VMAX | 12.5 | V | Pin can tolerate VMAX or less. | 9 | ||
| Weak Pull-up / Pull-down Current | IPU | 1.75 | mA | Internal VDD pull-up, VIHH pull-down, VDD = 5.5V, VCS = 12.5V | 9 | ||
| Input Leakage Current | IIL | -1 | 1 | µA | VIN = VDD and VIN = VSS | 9 | |
| Operating Temperature Range | TA | -40 | 125 | °C | 14 | ||
| Storage temperature | -65 | 150 | °C | 3 | |||
| Voltage on VDD with respect to VSS | VDD | -0.6 | 7 | V | 3 | ||
| Voltage on CS, SCK, SDI, SDI/SDO, WP, SHDN with respect to VSS | -0.6 | 12.5 | V | 3 | |||
| Input clamp current | IIK | -20 | 20 | mA | VI < 0, VI > VDD, VI > VPP ON HV pins | 3 | |
| Output clamp current | IOK | -20 | 20 | mA | VO < 0 or VO > VDD | 3 | |
| Maximum output current sunk by any Output pin | 25 | mA | 3 | ||||
| Maximum output current sourced by any Output pin | 25 | mA | 3 | ||||
| Maximum current out of VSS pin | 100 | mA | 3 | ||||
| Maximum current into VDD pin | 100 | mA | 3 | ||||
| Maximum current into PxA, PxW and PxB pins | -2.5 | 2.5 | mA | 3 | |||
| Ambient temperature with power applied | -40 | 125 | °C | 3 | |||
| Soldering temperature of leads (10 seconds) | 300 | °C | 3 | ||||
| Maximum Junction Temperature | TJ | 150 | °C | 3 | |||
| Nominal Resistance Tempco | ΔRAB/ΔT | 50 | ppm/°C | TA = -20°C to +70°C | 5 | ||
| Nominal Resistance Tempco | ΔRAB/ΔT | 100 | ppm/°C | TA = -40°C to +85°C | 5 | ||
| Nominal Resistance Tempco | ΔRAB/ΔT | 150 | ppm/°C | TA = -40°C to +125°C | 5 | ||
| Ratiometric Tempco | ΔVWB/ΔT | 15 | ppm/°C | Code = Midscale (80h or 40h) | 5 | ||
| Leakage current into A, W or B | IWL | 100 | nA | MCP4XX1 PxA = PxW = PxB = VSS | 5 | ||
| Bandwidth -3 dB (10 kΩ, 8-bit) | BW | 1 | MHz | 10 kΩ 8-bit Code = 80h, load = 30 pF | 6 | ||
| Capacitance (PA) | CAW | 75 | pF | f = 1 MHz, Code = Full-Scale | 8 | ||
| Capacitance (PW) | CW | 120 | pF | f = 1 MHz, Code = Full-Scale | 8 | ||
| Capacitance (PB) | CBW | 75 | pF | f = 1 MHz, Code = Full-Scale | 8 | ||
| CS pull-up/pull-down current | ICS | 170 | µA | CS pin, VDD = 5.5V, VCS = 3V | 9 | ||
| CS pull-up/pull-down resistance | RCS | 16 | kΩ | VDD = 5.5V, VCS = 3V | 9 | ||
| Pin Capacitance | CIN, COUT | 10 | pF | fC = 20 MHz | 9 | ||
| EEPROM Programming Write Cycle Time | tWC | 5 | 10 | ms | 10 | ||
| SCK Input Frequency | FSCK | 10 | MHz | VDD = 2.7V to 5.5V | 11 | ||
| SCK Input Frequency | FSCK | 1 | MHz | VDD = 1.8V to 2.7V | 11 | ||
| Thermal Resistance, 8L-MSOP | θJA | 211 | °C/W | 14 |
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 | P = Plastic Dual In-line (PDIP) (300 mil), 8/14-lead SN = Plastic Small Outline (SOIC), (150 mil), 8-lead | 85 |
CAD (KiCad official)
- Symbol:
MCP4161-103E - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
mcp4161-103e-etched.step/mcp4161-103e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp4161-103e.step/mcp4161-103e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (88 pp, sha256
485870dfa4cb7357, 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).
# MCP4161-103E
**Microchip Tech** · Digital Potentiometers · MSOP-8
MCP4161-103E 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 | CS | input | Chip select input: forcing CS to VIL enables serial commands and forcing it to VIHH enables high-voltage serial commands, and the input is high-voltage tolerant up to 12.5V. |
| 2 | SCK | input | SPI serial clock input, a high-voltage tolerant input with Schmitt trigger that operates at up to 10 MHz in SPI modes 0,0 and 1,1. |
| 3 | SDI/SDO | bidirectional | Multiplexed SPI serial data input/output on the MCP41X1; it acts as SDI on input and switches to SDO for reads, and the host SDO must be protected from drive conflict; SDO is an open-drain output using the internal smart pull-up. |
| 4 | VSS | power_in | Device ground reference for all pins. |
| 5 | P0A | passive | Potentiometer 0 terminal A, connected to full-scale wiper value (0x80 for 7-bit devices, 0x100 for 8-bit); voltage must be between VSS and VDD and it may carry positive or negative current. |
| 6 | P0W | passive | Potentiometer 0 wiper terminal, the adjustable terminal of the digital potentiometer; voltage must be between VSS and VDD and it may carry positive or negative current. |
| 7 | P0B | passive | Potentiometer 0 terminal B, connected to the zero-scale wiper value (0x00); voltage must be between VSS and VDD and it may carry positive or negative current. |
| 8 | VDD | power_in | Positive power supply input relative to VSS; while VDD is below Vmin (2.7V) the electrical performance may not meet the data sheet specifications. |
## 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | 2.7 | | 5.5 | V | | 4 |
| Supply Voltage (serial interface only) | VDD | 1.8 | | 2.7 | V | Serial Interface only | 4 |
| VDD start voltage to ensure wiper reset | VBOR | | | 1.65 | V | RAM retention voltage (VRAM) < VBOR | 4 |
| Supply current, serial interface active | IDD | | | 450 | µA | Serial Interface Active, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to volatile Wiper 0 | 4 |
| EE write current | IDD | | | 1 | mA | EE Write Current, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to non-volatile Wiper 0 | 4 |
| Supply current, serial interface inactive | IDD | | 2.5 | 5 | µA | Serial Interface Inactive, CS = VIH, VDD = 5.5V | 4 |
| Supply current, serial interface active (decrement non-volatile wiper) | IDD | | 0.55 | 1 | mA | Serial Interface Active, VDD = 5.5V, CS = VIHH, SCK @ 5 MHz, decrement non-volatile Wiper 0 | 4 |
| Resistance RAB | RAB | 8 | 10 | 12 | kΩ | -103 devices (Note 1) | 5 |
| Resistance tolerance | | -20 | | 20 | % | Resistance (± 20%), -103 devices | 5 |
| Wiper resistance | RW | | 75 | 160 | Ω | VDD = 5.5 V, IW = 2.0 mA, code = 00h | 5 |
| Wiper resistance | RW | | 75 | 300 | Ω | VDD = 2.7 V, IW = 2.0 mA, code = 00h | 5 |
| Maximum current through A, W or B | IW | | | 2.5 | mA | Worst case current through wiper at Full-Scale or Zero Scale | 5 |
| Full-Scale Error (10 kΩ, 8-bit) | VWFSE | -3.5 | -0.1 | | LSb | 10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V | 6 |
| Zero-Scale Error (10 kΩ, 8-bit) | VWZSE | | 0.1 | 3.5 | LSb | 10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V | 6 |
| Potentiometer Integral Non-linearity 8-bit | INL | -1 | 0.5 | 1 | LSb | 8-bit 3.0V ≤ VDD ≤ 5.5V MCP4XX1 devices only (Note 2) | 6 |
| Potentiometer Differential Non-linearity 8-bit | DNL | -0.5 | 0.25 | 0.5 | LSb | 8-bit 3.0V ≤ VDD ≤ 5.5V MCP4XX1 devices only (Note 2) | 6 |
| Rheostat Integral Non-linearity (10 kΩ, 8-bit) | R-INL | -1.5 | 0.5 | 1.5 | LSb | 10 kΩ 8-bit 5.5V, IW = 450 µA | 7 |
| Rheostat Integral Non-linearity (10 kΩ, 8-bit) | R-INL | -5.5 | 2.5 | 5.5 | LSb | 10 kΩ 8-bit 3.0V, IW = 240 µA (Note 7) | 7 |
| Rheostat Differential Non-linearity (10 kΩ, 8-bit) | R-DNL | -0.5 | 0.25 | 0.5 | LSb | 10 kΩ 8-bit 5.5V, IW = 450 µA | 8 |
| Rheostat Differential Non-linearity (10 kΩ, 8-bit) | R-DNL | -1 | 0.25 | 1 | LSb | 10 kΩ 8-bit 3.0V (Note 7) | 8 |
| High Voltage Input Entry Voltage | VIHH | 8.5 | | 12.5 | V | Threshold for WiperLock Technology | 9 |
| High Voltage Limit | VMAX | | | 12.5 | V | Pin can tolerate VMAX or less. | 9 |
| Weak Pull-up / Pull-down Current | IPU | | | 1.75 | mA | Internal VDD pull-up, VIHH pull-down, VDD = 5.5V, VCS = 12.5V | 9 |
| Input Leakage Current | IIL | -1 | | 1 | µA | VIN = VDD and VIN = VSS | 9 |
| Operating Temperature Range | TA | -40 | | 125 | °C | | 14 |
| Storage temperature | | -65 | | 150 | °C | | 3 |
| Voltage on VDD with respect to VSS | VDD | -0.6 | | 7 | V | | 3 |
| Voltage on CS, SCK, SDI, SDI/SDO, WP, SHDN with respect to VSS | | -0.6 | | 12.5 | V | | 3 |
| Input clamp current | IIK | -20 | | 20 | mA | VI < 0, VI > VDD, VI > VPP ON HV pins | 3 |
| Output clamp current | IOK | -20 | | 20 | mA | VO < 0 or VO > VDD | 3 |
| Maximum output current sunk by any Output pin | | | | 25 | mA | | 3 |
| Maximum output current sourced by any Output pin | | | | 25 | mA | | 3 |
| Maximum current out of VSS pin | | | | 100 | mA | | 3 |
| Maximum current into VDD pin | | | | 100 | mA | | 3 |
| Maximum current into PxA, PxW and PxB pins | | -2.5 | | 2.5 | mA | | 3 |
| Ambient temperature with power applied | | -40 | | 125 | °C | | 3 |
| Soldering temperature of leads (10 seconds) | | | | 300 | °C | | 3 |
| Maximum Junction Temperature | TJ | | | 150 | °C | | 3 |
| Nominal Resistance Tempco | ΔRAB/ΔT | | 50 | | ppm/°C | TA = -20°C to +70°C | 5 |
| Nominal Resistance Tempco | ΔRAB/ΔT | | 100 | | ppm/°C | TA = -40°C to +85°C | 5 |
| Nominal Resistance Tempco | ΔRAB/ΔT | | 150 | | ppm/°C | TA = -40°C to +125°C | 5 |
| Ratiometric Tempco | ΔVWB/ΔT | | 15 | | ppm/°C | Code = Midscale (80h or 40h) | 5 |
| Leakage current into A, W or B | IWL | | 100 | | nA | MCP4XX1 PxA = PxW = PxB = VSS | 5 |
| Bandwidth -3 dB (10 kΩ, 8-bit) | BW | | 1 | | MHz | 10 kΩ 8-bit Code = 80h, load = 30 pF | 6 |
| Capacitance (PA) | CAW | | 75 | | pF | f = 1 MHz, Code = Full-Scale | 8 |
| Capacitance (PW) | CW | | 120 | | pF | f = 1 MHz, Code = Full-Scale | 8 |
| Capacitance (PB) | CBW | | 75 | | pF | f = 1 MHz, Code = Full-Scale | 8 |
| CS pull-up/pull-down current | ICS | | 170 | | µA | CS pin, VDD = 5.5V, VCS = 3V | 9 |
| CS pull-up/pull-down resistance | RCS | | 16 | | kΩ | VDD = 5.5V, VCS = 3V | 9 |
| Pin Capacitance | CIN, COUT | | 10 | | pF | fC = 20 MHz | 9 |
| EEPROM Programming Write Cycle Time | tWC | | 5 | 10 | ms | | 10 |
| SCK Input Frequency | FSCK | | | 10 | MHz | VDD = 2.7V to 5.5V | 11 |
| SCK Input Frequency | FSCK | | | 1 | MHz | VDD = 1.8V to 2.7V | 11 |
| Thermal Resistance, 8L-MSOP | θJA | | 211 | | °C/W | | 14 |
## 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 | P = Plastic Dual In-line (PDIP) (300 mil), 8/14-lead SN = Plastic Small Outline (SOIC), (150 mil), 8-lead | 85 |
## CAD (KiCad official)
- Symbol: `MCP4161-103E`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `mcp4161-103e-etched.step` / `mcp4161-103e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp4161-103e.step` / `mcp4161-103e.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](docs/mcp4161-103e-datasheet.pdf) (88 pp, sha256 `485870dfa4cb7357`, retrieved 2026-10-28, tier: manufacturer)
- **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](docs/mcp4161-103e-datasheet.pdf)