MCP45HV31-103E 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	VL	power_in	Positive digital power supply input relative to DGND, ranging from 1.8V to 5.5V, with a decoupling capacitor to DGND recommended.
2	SCL	input	I2C serial clock input (Schmitt trigger), input-only because the device is an I2C slave.
3	A1	input	I2C address bit 1 input (Schmitt trigger); with A0 allows up to four devices on one I2C bus.
4	SDA	bidirectional	I2C serial data input/output (Schmitt trigger) with an open-drain N-channel driver, used to read and write the Wiper and TCON registers.
5	A0	input	I2C address bit 0 input (Schmitt trigger), latched at POR/BOR.
6	WLAT	input	Wiper latch enable input: 0 transfers the received I2C shift-register value to the Wiper register, 1 holds the received value in the shift register buffer.
7	NC	unconnected	Not internally connected to the die; connect to DGND or VL to reduce noise coupling.
8	SHDN	input	Shutdown input (Schmitt trigger) that forces the resistor network terminals into the hardware shutdown state.
9	DGND	power_in	Digital ground reference.
10	V-	power_in	Analog negative potential supply, which must be lower than or equal to the DGND potential.
11	P0B	passive	Potentiometer 0 Terminal B, the fixed connection to zero-scale wiper value (0x00), with no polarity and voltage between V+ and V-.
12	P0W	passive	Potentiometer 0 wiper terminal, with no polarity relative to A or B and voltage between V+ and V-.
13	P0A	passive	Potentiometer 0 Terminal A, the fixed connection to full-scale wiper value (0x7F for 7-bit), with no polarity and voltage between V+ and V-.
14	V+	power_in	Analog positive supply voltage, which must be at a higher potential than V-, maximum +36V.

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
Resistance RAB (-103)	RAB	8	10	12	kΩ	-103 devices, V+/V- = 10V to 36V	5
Digital supply VL	VL	2.7		5.5	V	With respect to DGND	4
Digital supply VL (low)	VL	1.8		5.5	V	VL ≥ V- + 2.7V	4
Analog supply V+	V+			36	V	With respect to V-	4
Resistor network supply voltage	VRN			36	V	Delta voltage between V+ and V-	4
Supply current serial interface active	IDDD		45	650	µA	Serial Interface Active, VL = 5.5V, FSCL = 3.4 MHz, V- = DGND	5
Supply current serial interface inactive	IDDD		4	7	µA	Serial Interface Inactive, VL = 5.5V, SCL = VIH, Wiper = 0, V- = DGND	5
Analog supply current	IDDA			5	µA	Current V+ to V-, PxA = PxB = PxW, DGND = V- +(V+/2)	5
RAB current	IAB			4.5	mA	-103 devices, V- = -18V, V+ = +18V	5
Wiper resistance	RW		75	170	Ω	IW = 1 mA, V+ = +18V, V- = -18V, code = 00h	6
Wiper resistance	RW		145	200	Ω	IW = 1 mA, V+ = +5.0V, V- = -5.0V, code = 00h	6
Terminal current	IT, IW			12.5	mA	-103 devices IBW(W ≠ ZS) and IAW(W ≠ FS)	6
Terminal current at ZS/FS	IT, IW			36	mA	IBW(W = ZS), or IAW(W = FS)	6
Full scale error 10k 7-bit	VWFSE	-3.5			LSb	10 k 7-bit VAB = 10V to 36V	7
Zero scale error 10k 7-bit VAB 20-36V	VWZSE			2.125	LSb	10 k 7-bit VAB = 20V to 36V	8
Zero scale error 10k 7-bit VAB 10-36V	VWZSE			3.25	LSb	10 k 7-bit VAB = 10V to 36V	8
Potentiometer INL 10k 7-bit	P-INL	-0.5	0.25	0.5	LSb	10 k 7-bit VAB = 10V to 36V	9
Potentiometer DNL 10k 7-bit	P-DNL	-0.25	0.1	0.25	LSb	10 k 7-bit VAB = 10V to 36V	9
Rheostat INL 10k 7-bit 36V	R-INL	-0.6		0.6	LSb	10 k 7-bit IW = 3.0 mA, (V+ - V-) = 36V (Note 2)	11
Rheostat INL 10k 7-bit 20V	R-INL	-0.8		0.8	LSb	10 k 7-bit IW = 1.7 mA, (V+ - V-) = 20V (Note 2)	11
Rheostat INL 10k 7-bit 10V	R-INL	-1.1		1.1	LSb	10 k 7-bit IW = 830 µA, (V+ - V-) = 10V	11
Rheostat DNL 10k 7-bit 36V	R-DNL	-0.25		0.25	LSb	10 k 7-bit IW = 3.0 mA, (V+ - V-) = 36V (Note 2)	12
Rheostat DNL 10k 7-bit 20V	R-DNL	-0.25		0.25	LSb	10 k 7-bit IW = 1.7 mA, (V+ - V-) = 20V (Note 2)	12
Rheostat DNL 10k 7-bit 10V	R-DNL	-0.25		0.25	LSb	10 k 7-bit IW = 830 µA, (V+ - V-) = 10V	12
Power supply sensitivity 7-bit	PSS		0.0015	0.0035	%/%	7-bit VL = 2.7V to 5.5V, V+ = 18V, V- = -18V, Code = 3Fh	14
Input leakage current	IIL	-1		1	uA	VIN = VL and VIN = DGND	13
Schmitt trigger high-input threshold	VIH	0.7			V	1.8V ≤ VL ≤ 5.5V; min 0.7 VL	13
Output low voltage SDA	VOL			0.2	V	VL = 5.5V, IOL = 5 mA; max 0.2 VL	13
Nominal resistance tempco	ΔRAB/ΔT		50		ppm/°C	TA = -40°C to +85°C	6
Nominal resistance tempco	ΔRAB/ΔT		100		ppm/°C	TA = -40°C to +125°C	6
Ratiometric tempco	ΔVBW/ΔT		15		ppm/°C	Code = Mid scale (3Fh)	6
Bandwidth -3 dB 10k 7-bit	BW		240		kHz	10 k 7-bit Code = 3Fh, load = 30 pF	10
Settling time 10k	tS		1		µs	Code = 00h -> 7Fh; 7Fh -> 00h, CL = 50 pF	16
Power dissipation 10k	PDISS		130		mW	VL = 5.5V, V+ = 18V, V- = -18V	14
Leakage current into A, W or B	ITL		5		nA	A = W = B = V-	6
Capacitance PA	CA		75		pF	Measured to V-, f =1 MHz, Wiper code = Mid Scale	13
Capacitance PW	CW		120		pF	Measured to V-, f =1 MHz, Wiper code = Mid Scale	13
Capacitance PB	CB		75		pF	Measured to V-, f =1 MHz, Wiper code = Mid Scale	13
Operating temperature	TA	-40		125	°C		21
Thermal resistance TSSOP-14	θJA		100		°C/W	14L-TSSOP (ST)	21
V+ with respect to DGND		-0.3		40	V	DGND - 0.3V to 40.0V	3
VL with respect to DGND		-0.6		7	V		3
Digital pins with respect to DGND		-0.6			V	SCL, SDA, A0, A1, WLAT, SHDN: -0.6V to VL + 0.6V	3
Continuous current into PxA/PxW/PxB		-12.5		12.5	mA	RAB = 10 kΩ	3
Package power dissipation TSSOP-14				1000	mW	TA = +50°C, TJ = +150°C	3
Maximum junction temperature	TJ			150	°C		3
Storage temperature		-65		150	°C		3
ESD HBM				5	kV	Human Body Model, all pins	3

CAD (KiCad official)

Symbol: MCP45HV31-103E
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)
3D model files: mcp45hv31-103e-etched.step / mcp45hv31-103e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp45hv31-103e.step / mcp45hv31-103e.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (100 pp, sha256 ab854db7c83242c1, retrieved 2026-10-31, 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

MCP45HV31-103E

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