MCP42010T-I from Microchip Tech, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	CS	input	SPI chip-select input (active-low). Used to execute a new command after it has been loaded into the shift register. Schmitt Trigger input; gates SCK/SI so no additional current is drawn while CS is high.
2	SCK	input	SPI serial clock input. Data on SI is latched on the rising edge and driven out on SO on the falling edge. Schmitt Trigger input; gated by CS.
3	SI	input	SPI serial data input (MOSI). Command and data bytes are clocked into the shift register on this pin. Schmitt Trigger input; gated by CS.
4	VSS	power_in	Device ground / negative supply reference (0 V). Return for both analog resistor terminals and digital I/O.
5	PB1	passive	Potentiometer 1 Terminal B connection. No polarity restriction versus PA1/PW1; nominal end-to-end resistance PA1-PB1 = 10 kΩ. Voltage on this terminal must be within VSS to VDD.
6	PW1	passive	Potentiometer 1 Wiper connection. Wiper position (0..255) is controlled via SPI; wiper resistance RW ≈ 52 Ω typical at code 00h, VDD = 5.5V. Max wiper current IW = ±1 mA.
7	PA1	passive	Potentiometer 1 Terminal A connection. Opposite end of the 10 kΩ resistor array from PB1. In shutdown mode this terminal is open-circuited from the resistor stack.
8	PA0	passive	Potentiometer 0 Terminal A connection. One end of the 10 kΩ resistor array for channel 0. In shutdown mode this terminal is open-circuited from the resistor stack.
9	PW0	passive	Potentiometer 0 Wiper connection. Wiper position (0..255) is controlled via SPI; wiper resistance RW ≈ 52 Ω typical at code 00h, VDD = 5.5V. Max wiper current IW = ±1 mA.
10	PB0	passive	Potentiometer 0 Terminal B connection. Opposite end of the 10 kΩ resistor array from PA0. Voltage on this terminal must be within VSS to VDD.
11	RS	input	Hardware reset input (active-low). Pulling RS low for at least 150 ns sets both wipers to mid-scale (code 80h). Has an internal active pull-up so it should not be left floating; do not toggle RS low while CS is low.
12	SHDN	input	Hardware shutdown input (active-low), Schmitt Trigger. When low, terminal A is open-circuited and PB/PW are shorted for both potentiometers to save power. Has an internal active pull-up; do not leave floating and do not toggle low while CS is low.
13	SO	output	SPI serial data output (MISO), used for daisy-chaining multiple MCP42XXX devices. Data is clocked out on the falling edge of SCK. Push-pull output that does not go high-Z when CS is high - it drives logic-low while CS is high.
14	VDD	power_in	Positive supply input, 2.7 V to 5.5 V single-supply operation. Static supply current is <1 µA typical; active supply current is ~340 µA typical at 5.5 V with fSCK = 10 MHz.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	TSSOP-14
Category	Data Acquisition
Pins	14

Ordering variants

Same part, different packaging or reel option.

MCP42010T-I/ST
MCP42010T-I-E/ST
MCP42010T-I/SL
MCP42010T-I-E/SL
MCP42010T-I-E/P
MCP42010T-I/P

CAD (KiCad official)

Symbol: MCP42010T-I
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Microchip Tech datasheet (None pp, sha256 6bee8156c8b9f1f6, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF