MCP4661-104E from Microchip Tech, in a TSSOP-14. 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	HVC/A0	input	High-voltage-tolerant (up to 12.5V) Schmitt-trigger input serving as I2C Address 0 (latched at POR/BOR) and as the High Voltage command pin when driven to VIHH.
2	SCL	input	I2C serial clock input from the host; the device is a slave so it accepts only external clock signals (high-voltage tolerant, Schmitt trigger).
3	SDA	bidirectional	I2C serial data input/output with an open-drain N-channel driver, connected to the host SDA (high-voltage tolerant, Schmitt trigger).
4	VSS	power_in	Device ground reference.
5	P1B	passive	Potentiometer 1 terminal B, the fixed Zero-Scale connection (wiper value 0x00); voltage must be between VSS and VDD.
6	P1W	passive	Potentiometer 1 wiper terminal, the adjustable terminal; voltage must be between VSS and VDD.
7	P1A	passive	Potentiometer 1 terminal A, the fixed Full-Scale connection (0x100 for 8-bit); voltage must be between VSS and VDD.
8	P0A	passive	Potentiometer 0 terminal A, the fixed Full-Scale connection (0x100 for 8-bit); voltage must be between VSS and VDD.
9	P0W	passive	Potentiometer 0 wiper terminal, the adjustable terminal; voltage must be between VSS and VDD.
10	P0B	passive	Potentiometer 0 terminal B, the fixed Zero-Scale connection (wiper value 0x00); voltage must be between VSS and VDD.
11	NC	unconnected	No connection; the datasheet says NC pins should be connected to either VDD or VSS.
12	A2	input	I2C Address 2 input (high-voltage tolerant, Schmitt trigger) which with A1 and A0 allows up to eight devices on one I2C bus.
13	A1	input	I2C Address 1 input (high-voltage tolerant, Schmitt trigger) which with A2 and A0 allows up to eight devices on one I2C bus.
14	VDD	power_in	Positive power supply input relative to VSS; specifications are guaranteed for 2.7V to 5.5V, with operation from 1.8V to 5.5V.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	TSSOP-14
Category	ADC/DAC/Data Conversion
Pins	14

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
Delay after device exits reset state	TBORD		10	20	µs	VDD > VBOR	4
Supply current, active 3.4 MHz	IDD			600	µA	Serial Interface Active, write all 0's to Volatile Wiper 0, VDD = 5.5V, FSCL = 3.4 MHz	4
Supply current, active 100 kHz	IDD			250	µA	Serial Interface Active, write all 0's to Volatile Wiper 0, VDD = 5.5V, FSCL = 100 kHz	4
Supply current, serial interface inactive	IDD		2.5	5	µA	Serial Interface Inactive (Stop condition, SCL = SDA = VIH), Wiper = 0, VDD = 5.5V, HVC/A0 = VIH	4
Nominal resistance RAB (-104)	RAB	80	100	120	kΩ	-104 devices (Note 1), ±20%	5
Resolution 8-bit	N		257		Taps	8-bit No Missing Codes	5
Nominal resistance match	/RAB0-RAB1//RAB		0.2	1.25	%	MCP46X1 devices only	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
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	5
Maximum current through terminal W	IT			2.5	mA	Terminal W IAW or IBW, W = FS or ZS	6
Maximum current Terminal A and B (RAB(MIN)=80000)	IAB			0.069	mA	VB = 0V, VA = 5.5V, RAB(MIN) = 80000	6
Leakage current into A, W or B	IWL		100		nA	MCP4XX1 PxA = PxW = PxB = VSS	6
Full-scale error 100k 8-bit	VWFSE	-0.5	-0.1		LSb	100 k 8-bit 3.0V ≤ VDD ≤ 5.5V	7
Zero-scale error 100k 8-bit	VWZSE		0.1	0.5	LSb	100 k 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, MCP4XX1 devices only (Note 2)	7
Potentiometer DNL 8-bit	DNL	-0.5	0.25	0.5	LSb	8-bit 3.0V ≤ VDD ≤ 5.5V, MCP4XX1 devices only (Note 2)	7
Bandwidth -3 dB, 100k 8-bit	BW		100		kHz	100 k 8-bit Code = 80h, load = 30 pF	8
Rheostat INL 100k 8-bit	R-INL	-1	0.5	1	LSb	100 k 8-bit 5.5V, IW = 45 µA	9
Rheostat INL 100k 8-bit	R-INL	-1.5	0.25	1.5	LSb	100 k 8-bit 3.0V, IW = 24 µA (Note 7)	9
Rheostat DNL 100k 8-bit	R-DNL	-0.5	0.25	0.5	LSb	100 k 8-bit 5.5V, IW = 45 µA	10
Capacitance (PA)	CAW		75		pF	f =1 MHz, Code = Full-Scale	10
Capacitance (PW)	CW		120		pF	f =1 MHz, Code = Full-Scale	10
Capacitance (PB)	CBW		75		pF	f =1 MHz, Code = Full-Scale	10
Schmitt trigger high input threshold (all inputs except SDA, SCL)	VIH	0.45			V	2.7V ≤ VDD ≤ 5.5V; min is 0.45 VDD	11
Schmitt trigger high input threshold (SDA, SCL)	VIH	0.7		12.5	V	min is 0.7 VDD; max is VMAX; 100 kHz to 3.4 MHz	11
Schmitt trigger low input threshold (all inputs except SDA, SCL)	VIL			0.2	V	max is 0.2 VDD	11
Schmitt trigger low input threshold (SDA, SCL)	VIL	-0.5		0.3	V	max is 0.3 VDD; 100 kHz to 3.4 MHz	11
High voltage limit	VMAX			12.5	V	Pin can tolerate VMAX or less	11
Output low voltage (SDA)	VOL	0		0.4	V	VDD ≥ 2.0V, IOL = 3 mA	12
Input leakage current	IIL	-1		1	µA	VIN = VDD and VIN = VSS	12
Pin capacitance	CIN, COUT		10		pF	fC = 3.4 MHz	12
Operating temperature range	TA	-40		125	°C		16
Voltage on VDD with respect to VSS	VDD	-0.6		7	V		3
Voltage on HVC/A0, A1, A2, SCL, SDA		-0.6		12.5	V	with respect to VSS	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 current into PxA, PxW, PxB pins		-2.5		2.5	mA		3
Maximum current into VDD pin				100	mA		3
Maximum current out of VSS pin				100	mA		3
Storage temperature		-65		150	°C		3
Ambient temperature with power applied		-40		125	°C		3
Package power dissipation TSSOP-14				1	W	TA = +50°C, TJ = +150°C	3
Maximum junction temperature	TJ			150	°C		3
Soldering temperature of leads				300	°C	10 seconds	3

CAD (KiCad official)

Symbol: MCP4661-104E
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)
3D model files: mcp4661-104e-etched.step / mcp4661-104e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp4661-104e.step / mcp4661-104e.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (102 pp, sha256 ee77464c39584a73, 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

MCP4661-104E

Verified MCP4661-104E

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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