MCP4361-103E from Microchip Tech, in a QFN-20-EP(4x4). 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	P3B	passive	Potentiometer 3 Terminal B, the zero-scale (wiper 0x00) connection, which must be held between VSS and VDD.
2	CS	input	SPI chip select input, high-voltage tolerant with Schmitt trigger; VIL enables serial commands and VIHH enables high-voltage serial commands.
3	SCK	input	SPI clock input, high-voltage tolerant with Schmitt trigger.
4	SDI	input	SPI serial data input, high-voltage tolerant with Schmitt trigger, connected to the host controller's SDO.
5	VSS	power_in	Device ground reference.
6	P1B	passive	Potentiometer 1 Terminal B, the zero-scale connection, which must be held between VSS and VDD.
7	P1W	passive	Potentiometer 1 wiper terminal, which must be held between VSS and VDD.
8	P1A	passive	Potentiometer 1 Terminal A, the full-scale connection, which must be held between VSS and VDD.
9	P0A	passive	Potentiometer 0 Terminal A, the full-scale connection, which must be held between VSS and VDD.
10	P0W	passive	Potentiometer 0 wiper terminal, which must be held between VSS and VDD.
11	P0B	passive	Potentiometer 0 Terminal B, the zero-scale connection, which must be held between VSS and VDD.
12	WP	input	Hardware EEPROM write protect input that forces the non-volatile memory to be write protected; it has a smart pull-up that shuts off when the pin is forced low.
13	RESET	input	Hardware reset input, high-voltage tolerant with Schmitt trigger and weak pull-up, that forces the device into the POR/BOR state.
14	SDO	output	SPI serial data output, connected to the host controller's SDI, used to read registers or monitor the command error bit.
15	VDD	power_in	Positive power supply input relative to VSS; device operates from 1.8V to 5.5V, with specifications guaranteed from 2.7V to 5.5V.
16	P2B	passive	Potentiometer 2 Terminal B, the zero-scale connection, which must be held between VSS and VDD.
17	P2W	passive	Potentiometer 2 wiper terminal, which must be held between VSS and VDD.
18	P2A	passive	Potentiometer 2 Terminal A, the full-scale connection, which must be held between VSS and VDD.
19	P3A	passive	Potentiometer 3 Terminal A, the full-scale connection, which must be held between VSS and VDD.
20	P3W	passive	Potentiometer 3 wiper terminal, which must be held between VSS and VDD.
21	EP	passive	Exposed pad connected to the die substrate; tie to the same potential as VSS or leave unconnected, and it can serve as a heat sink.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	QFN-20-EP(4x4)
Category	ADC/DAC/Data Conversion
Pins	21

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Resistance RAB (-103 devices)	RAB	8	10	12	kΩ	-103 devices (Note 1), ±20%	5
Supply Voltage	VDD	2.7		5.5	V		4
Supply Voltage (serial interface only)	VDD	1.8		2.7	V	Serial Interface only.	4
Operating Temperature	TA	-40		125	°C		15
VDD Start Voltage to ensure Wiper Reset	VBOR			1.65	V	RAM retention voltage (VRAM) < VBOR	4
Delay after device exits reset state	TBORD		10	20	µs	(VDD > VBOR)	4
Supply Current, serial interface active	IDD			450	µA	VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to volatile Wiper 0 (address 0h)	4
Supply Current, EE write	IDD			1	mA	EE Write Current, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to non-volatile Wiper 0 (address 2h)	4
Supply Current, serial interface inactive	IDD		2.5	5	µA	Serial Interface Inactive, CS = VIH, VDD = 5.5V	4
Supply Current, high-voltage decrement	IDD		0.55	1	mA	Serial Interface Active, VDD = 5.5V, CS = VIHH, SCK @ 5 MHz, decrement non-volatile Wiper 0 (address 2h)	4
Wiper Resistance 5.5V	RW		75	160	Ω	VDD = 5.5 V, IW = 2.0 mA, code = 00h	5
Wiper Resistance 2.7V	RW		75	300	Ω	VDD = 2.7 V, IW = 2.0 mA, code = 00h	5
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
Resistor Terminal Input Voltage Range	VA,VW,VB	0		5.5	V	Vss to VDD; Note 5, Note 6	6
Maximum current through A, W or B	IW			2.5	mA	Note 6, Worst case current through wiper when wiper is either Full Scale or Zero Scale.	6
Full Scale Error 10 kΩ 8-bit	VWFSE	-3.5	-0.1		LSb	10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V	7
Zero Scale Error 10 kΩ 8-bit	VWZSE		0.1	3.5	LSb	10 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V	7
Potentiometer INL 8-bit	INL	-1	0.5	1	LSb	8-bit 3.0V ≤ VDD ≤ 5.5V, MCP43X1 devices only (Note 2)	7
Potentiometer DNL 8-bit	DNL	-0.5	0.25	0.5	LSb	8-bit 3.0V ≤ VDD ≤ 5.5V, MCP43X1 devices only (Note 2)	7
Bandwidth -3 dB 10 kΩ 8-bit	BW		1		MHz	10 kΩ 8-bit Code = 80h	7
Rheostat INL 10 kΩ 8-bit 5.5V	R-INL	-1.5	0.5	1.5	LSb	10 kΩ 8-bit 5.5V, IW = 450 µA	8
Rheostat INL 10 kΩ 8-bit 3.0V	R-INL	-5.5	2.5	5.5	LSb	10 kΩ 8-bit 3.0V, IW = 240 µA (Note 7)	8
Rheostat DNL 10 kΩ 8-bit 5.5V	R-DNL	-0.5	0.25	0.5	LSb	10 kΩ 8-bit 5.5V, IW = 450 µA	9
Rheostat DNL 10 kΩ 8-bit 3.0V	R-DNL	-1	0.25	1	LSb	10 kΩ 8-bit 3.0V (Note 7)	9
Capacitance (PA)	CAW		75		pF	f =1 MHz, Code = Full Scale	9
Capacitance (PW)	CW		120		pF	f =1 MHz, Code = Full Scale	9
Capacitance (PB)	CBW		75		pF	f =1 MHz, Code = Full Scale	9
Schmitt Trigger High Input Threshold	VIH	0.45			V	2.7V ≤ VDD ≤ 5.5V; min is 0.45 VDD	10
Schmitt Trigger Low Input Threshold	VIL			0.2	V	max is 0.2VDD	10
High Voltage Input Entry Voltage	VIHH	8.5		12.5	V	Threshold for WiperLock Technology (Note 6)	10
High Voltage Limit	VMAX			12.5	V	Pin can tolerate VMAX or less. (Note 6)	10
Output Low Voltage (SDO)	VOL	0		0.3	V	IOL = 5 mA, VDD = 5.5V; max is 0.3VDD	10
Output High Voltage (SDO)	VOH	0.7			V	IOH = -2.5 mA, VDD = 5.5V; min is 0.7VDD	10
Weak Pull-up Current	IPU			1.75	mA	Internal VDD pull-up, VIHH pull-down, VDD = 5.5V, VCS = 12.5V	11
Input Leakage Current	IIL	-1		1	µA	VIN = VDD (all pins) and VIN = VSS (all pins except RESET)	11
EEPROM Programming Write Cycle Time	tWC		3	10	ms		11
Power Supply Sensitivity 8-bit	PSS		0.0015	0.0035	%/%	8-bit VDD = 2.7V to 5.5V, VA = 2.7V, Code = 80h	11
RESET pulse width	tRST	50			ns		12
SCK Input Frequency	FSCK			10	MHz	VDD = 2.7V to 5.5V	13
SCK input high time	TscH	45			ns	VDD = 2.7V to 5.5V	13
SCK input low time	TscL	45			ns	VDD = 2.7V to 5.5V	13
SDO data output valid after SCK falling edge	TscL2DOV			70	ns	VDD = 2.7V to 5.5V	13
Voltage on VDD with respect to VSS	VDD	-0.6		7	V		3
Voltage on CS, SCK, SDI, WP, RESET		-0.6		12.5	V	with respect to VSS	3
Voltage on PxA, PxW, PxB, SDO		-0.3			V	-0.3V to VDD + 0.3V with respect to VSS	3
Maximum current into PXA, PXW & PXB pins		-2.5		2.5	mA		3
Storage temperature		-65		150	°C		3
Maximum Junction Temperature	TJ			150	°C		3
Thermal Resistance, 20L-QFN	θJA		43		°C/W		15

CAD (KiCad official)

Symbol: MCP4361-103E
Footprint: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
3D model files: mcp4361-103e-etched.step / mcp4361-103e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp4361-103e.step / mcp4361-103e.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (80 pp, sha256 4c13d6e29f4050bf, retrieved 2026-10-30, 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

MCP4361-103E

Verified MCP4361-103E

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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